//+------------------------------------------------------------------+
//|                                                PropFirmGuard.mq5 |
//|                                  Copyright 2026, MetaQuotes Ltd. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2026, MetaQuotes Ltd."
#property link      "https://www.mql5.com"
#property version   "1.00"

//+------------------------------------------------------------------+
//| Standard Library                                                 |
//+------------------------------------------------------------------+
#include <Trade\Trade.mqh>

//+------------------------------------------------------------------+
//| Enumerations                                                     |
//+------------------------------------------------------------------+
//| Represents the general compliance condition of the account.      |
//+------------------------------------------------------------------+
enum ENUM_COMPLIANCE_STATUS
  {
   COMPLIANCE_SAFE = 0,          // Account is operating within configured limits
   COMPLIANCE_WARNING,           // Account is approaching a compliance limit
   COMPLIANCE_CRITICAL,          // Account is very close to a compliance limit
   COMPLIANCE_BREACHED           // A configured compliance limit has been breached
  };

//+------------------------------------------------------------------+
//| Profit target status                                             |
//+------------------------------------------------------------------+
//| Represents progress toward the configured account profit target. |
//+------------------------------------------------------------------+
enum ENUM_TARGET_STATUS
  {
   TARGET_IN_PROGRESS = 0,       // Target is still being pursued
   TARGET_NEARING,               // At least 90% of the target has been reached
   TARGET_REACHED                // Required target balance has been achieved
  };

//+------------------------------------------------------------------+
//| Protection action                                                |
//+------------------------------------------------------------------+
//| Defines what Prop Firm Guard should do when a monitored rule     |
//| requires protective action.                                      |
//+------------------------------------------------------------------+
enum ENUM_PROTECTION_ACTION
  {
   PROTECTION_WARN_ONLY = 0,     // Report the condition without closing positions
   PROTECTION_CLOSE_AFFECTED,    // Close positions affected by the triggering rule
   PROTECTION_CLOSE_ALL          // Close every open account position
  };
  
//+------------------------------------------------------------------+
//| Daily session status                                             |
//+------------------------------------------------------------------+
//| Represents the lifecycle state of one persistent daily session.  |
//+------------------------------------------------------------------+
enum ENUM_DAILY_SESSION_STATUS
  {
   SESSION_AWAITING_CONFIRMATION = 0, // Daily starting balance is not yet confirmed
   SESSION_ACTIVE,                    // Daily starting balance has been confirmed
   SESSION_CLOSED                     // Session has been finalized after day rollover
  };

//+------------------------------------------------------------------+
//| Daily session load result                                        |
//+------------------------------------------------------------------+
//| Distinguishes a restored session from absence and database error. |
//+------------------------------------------------------------------+
enum ENUM_DAILY_SESSION_LOAD_RESULT
  {
   SESSION_LOAD_ERROR     = -1, // Database operation failed
   SESSION_LOAD_NOT_FOUND = 0,  // No matching daily session exists
   SESSION_LOAD_FOUND     = 1   // Matching daily session was restored
  };

//+------------------------------------------------------------------+
//| Inputs                                                           |
//+------------------------------------------------------------------+
input group "General"
input int    InpTimerSeconds            = 1;      // Dashboard update interval in seconds
input int    InpDashboardX              = 10;     // Dashboard horizontal position
input int    InpDashboardY              = 105;    // Dashboard vertical position
input bool   InpEnableAlerts            = true;   // Enable terminal alerts
input bool   InpEnablePushNotifications = false;  // Enable mobile push notifications

input group "Daily Session"
input int InpDailyResetHour   = 0; // Daily reset hour in broker server time
input int InpDailyResetMinute = 0; // Daily reset minute in broker server time

input group "Prop Firm Rules"
input double InpInitialAccountBalance  = 20000.0; // Initial prop-firm account balance
input double InpDailyDrawdownPercent   = 5.0;     // Maximum permitted daily drawdown
input double InpOverallDrawdownPercent = 10.0;    // Maximum permitted overall drawdown
input double InpProfitTargetPercent    = 8.0;     // Required profit target

input group "Warning Levels"
input double InpWarningLevelPercent  = 70.0;      // Loss limit usage that triggers warning
input double InpCriticalLevelPercent = 90.0;      // Loss limit usage that triggers critical state

input group "News Filter"
input bool   InpEnableNewsFilter       = true;    // Enable economic news monitoring
input ENUM_CALENDAR_EVENT_IMPORTANCE InpNewsImportance = CALENDAR_IMPORTANCE_HIGH; // Minimum monitored importance
input int    InpMinutesBeforeNews      = 10;      // Restricted minutes before news
input int    InpMinutesAfterNews       = 10;      // Restricted minutes after news
input bool   InpAllowNewsHolding       = true;    // Allow positions to remain open during news

input group "Protection Actions"
input ENUM_PROTECTION_ACTION InpDailyDrawdownAction   = PROTECTION_WARN_ONLY; // Daily breach action
input ENUM_PROTECTION_ACTION InpOverallDrawdownAction = PROTECTION_WARN_ONLY; // Overall breach action
input ENUM_PROTECTION_ACTION InpNewsRestrictionAction = PROTECTION_WARN_ONLY; // News restriction action

//+------------------------------------------------------------------+
//| Account state structure                                          |
//+------------------------------------------------------------------+
//| Holds the live account values required by the monitoring logic.  |
//+------------------------------------------------------------------+
struct SAccountState
  {
   long                    login;       // Trading account login number
   double                  balance;     // Current account balance
   double                  equity;      // Current account equity
   double                  floatingPL;  // Current floating profit or loss
   ENUM_COMPLIANCE_STATUS  status;      // Current overall compliance status
  };

//+------------------------------------------------------------------+
//| Account settings structure                                       |
//+------------------------------------------------------------------+
//| Stores the main prop-firm rules associated with this account.    |
//+------------------------------------------------------------------+
struct SAccountSettings
  {
   long              accountLogin;           // Trading account login
   string            accountServer;          // Broker trading server
   double            initialBalance;         // Initial prop-firm account balance
   double            dailyDrawdownPercent;   // Maximum daily drawdown
   double            overallDrawdownPercent; // Maximum overall drawdown
   double            profitTargetPercent;    // Required profit target
   datetime          updatedAt;              // Last settings update time
  };
  
//+------------------------------------------------------------------+
//| Daily session structure                                          |
//+------------------------------------------------------------------+
//| Stores the persistent reference for one configured trading day.  |
//+------------------------------------------------------------------+
struct SDailySession
  {
   long                       accountLogin;      // Trading account login
   string                     accountServer;     // Broker trading server
   string                     sessionDate;       // Configured trading-day session key
   double                     startingBalance;   // Trader-confirmed daily starting balance
   double                     startingEquity;    // Equity captured when confirmation occurs
   bool                       balanceConfirmed;  // Whether the daily baseline is confirmed
   ENUM_DAILY_SESSION_STATUS  status;            // Current daily session lifecycle state
   datetime                   createdAt;         // Time the session record was created
   datetime                   updatedAt;         // Time the session record was last updated
  };

//+------------------------------------------------------------------+
//| Global variables                                                 |
//+------------------------------------------------------------------+
SAccountState    g_accountState;     // Latest monitored account state
SAccountSettings g_accountSettings;  // Persisted prop-firm settings
SDailySession    g_dailySession;     // Current configured daily session

string g_startBalanceEdit = "PFG_StartBalanceEdit"; // Starting balance input field
string g_confirmButton    = "PFG_ConfirmBalance";   // Daily balance confirmation button
string g_databaseName     = "prop_firm_compliance.sqlite"; // SQLite database file
string g_instanceLockName = "";      // Account-specific terminal instance lock

int  g_database             = INVALID_HANDLE; // Active SQLite database handle
bool g_hasDailySession      = false;          // Whether a daily session is currently loaded
bool g_instanceLockAcquired = false;          // Whether this EA owns the instance lock

//+------------------------------------------------------------------+
//| Validate compliance inputs                                       |
//+------------------------------------------------------------------+
bool ValidateComplianceInputs()
  {
//--- Validate the monitoring interval
   if(InpTimerSeconds < 1)
     {
      Print("Prop Firm Guard: Timer interval must be at least 1 second.");

      return(false);
     }

//--- Validate the configured daily reset hour
   if(InpDailyResetHour < 0 ||
      InpDailyResetHour > 23)
     {
      Print("Prop Firm Guard: Daily reset hour must be between 0 and 23.");

      return(false);
     }

//--- Validate the configured daily reset minute
   if(InpDailyResetMinute < 0 ||
      InpDailyResetMinute > 59)
     {
      Print("Prop Firm Guard: Daily reset minute must be between 0 and 59.");

      return(false);
     }

//--- Validate the initial account balance
   if(InpInitialAccountBalance <= 0.0)
     {
      Print("Prop Firm Guard: Initial account balance must be greater than zero.");

      return(false);
     }

//--- Validate the daily drawdown percentage
   if(InpDailyDrawdownPercent <= 0.0 ||
      InpDailyDrawdownPercent > 100.0)
     {
      Print("Prop Firm Guard: Daily drawdown percentage must be between 0 and 100.");

      return(false);
     }

//--- Validate the overall drawdown percentage
   if(InpOverallDrawdownPercent <= 0.0 ||
      InpOverallDrawdownPercent > 100.0)
     {
      Print("Prop Firm Guard: Overall drawdown percentage must be between 0 and 100.");

      return(false);
     }

//--- Validate the profit target percentage
   if(InpProfitTargetPercent <= 0.0 ||
      InpProfitTargetPercent > 100.0)
     {
      Print("Prop Firm Guard: Profit target percentage must be between 0 and 100.");

      return(false);
     }

//--- Validate the warning threshold
   if(InpWarningLevelPercent <= 0.0 ||
      InpWarningLevelPercent >= InpCriticalLevelPercent)
     {
      Print("Prop Firm Guard: Warning level must be greater than 0 and below the critical level.");

      return(false);
     }

//--- Validate the critical threshold
   if(InpCriticalLevelPercent <= InpWarningLevelPercent ||
      InpCriticalLevelPercent >= 100.0)
     {
      Print("Prop Firm Guard: Critical level must be above the warning level and below 100.");

      return(false);
     }

//--- Validate the news restriction windows
   if(InpMinutesBeforeNews < 0 ||
      InpMinutesAfterNews < 0)
     {
      Print("Prop Firm Guard: News restriction minutes cannot be negative.");

      return(false);
     }

   return(true);
  }

//+------------------------------------------------------------------+
//| Update account state                                             |
//+------------------------------------------------------------------+
void UpdateAccountState()
  {
//--- Read the current account values
   g_accountState.login = AccountInfoInteger(ACCOUNT_LOGIN);
   g_accountState.balance = AccountInfoDouble(ACCOUNT_BALANCE);
   g_accountState.equity = AccountInfoDouble(ACCOUNT_EQUITY);

//--- Derive the current floating profit or loss
   g_accountState.floatingPL = g_accountState.equity - g_accountState.balance;

//--- Initialize compliance status before rule calculations are added
   g_accountState.status = COMPLIANCE_SAFE;
  }
  
//+------------------------------------------------------------------+
//| Acquire instance lock                                            |
//+------------------------------------------------------------------+
bool AcquireInstanceLock()
  {
//--- Require a valid trading account identity
   if(g_accountState.login <= 0)
     {
      Print("Prop Firm Guard: Cannot acquire an instance lock without a valid account login.");

      return(false);
     }

//--- Build one terminal-wide lock name for the current account
   g_instanceLockName =
      StringFormat("PFG_INSTANCE_LOCK_%I64d",
                   g_accountState.login);

//--- Create the temporary lock only when it does not already exist
   if(!GlobalVariableCheck(g_instanceLockName))
     {
      ResetLastError();

      if(!GlobalVariableTemp(g_instanceLockName))
        {
         Print("Prop Firm Guard: Could not create the terminal instance lock. Error: ",
               GetLastError());

         return(false);
        }
     }

//--- Atomically claim an available lock whose current value is zero
   ResetLastError();

   if(!GlobalVariableSetOnCondition(g_instanceLockName,
                                    1.0,
                                    0.0))
     {
      int errorCode = GetLastError();

      if(errorCode == 0)
        {
         Print("Prop Firm Guard: Another instance is already active for account ",
               g_accountState.login,
               ". Only one instance per trading account is allowed.");
        }
      else
        {
         Print("Prop Firm Guard: Could not acquire the terminal instance lock. Error: ",
               errorCode);
        }

      return(false);
     }

//--- Record ownership only after the atomic acquisition succeeds
   g_instanceLockAcquired = true;

   Print("Prop Firm Guard: Instance lock acquired for account ",
         g_accountState.login,
         ".");

   return(true);
  }
  
//+------------------------------------------------------------------+
//| Release instance lock                                            |
//+------------------------------------------------------------------+
bool ReleaseInstanceLock()
  {
//--- Ignore cleanup when this EA never acquired the lock
   if(!g_instanceLockAcquired)
      return(true);

//--- Treat a missing lock variable as already released
   if(!GlobalVariableCheck(g_instanceLockName))
     {
      g_instanceLockAcquired = false;

      return(true);
     }

//--- Atomically return this owned lock to the available state
   ResetLastError();

   if(!GlobalVariableSetOnCondition(g_instanceLockName,
                                    0.0,
                                    1.0))
     {
      Print("Prop Firm Guard: Could not release the terminal instance lock. Error: ",
            GetLastError());

      return(false);
     }

//--- Clear local ownership after successful release
   g_instanceLockAcquired = false;

   Print("Prop Firm Guard: Instance lock released for account ",
         g_accountState.login,
         ".");

   return(true);
  }
  
//+------------------------------------------------------------------+
//| Get current daily session date                                   |
//+------------------------------------------------------------------+
string GetCurrentSessionDate()
  {
//--- Read the server time currently known by the terminal
   datetime serverTime = TimeCurrent();

//--- Convert the configured reset boundary to seconds from midnight
   int resetOffsetSeconds =
      (InpDailyResetHour * 60 * 60) +
      (InpDailyResetMinute * 60);

//--- Shift the server time so the configured reset becomes midnight
   datetime sessionTime =
      serverTime - resetOffsetSeconds;

//--- Use the shifted calendar date as the persistent session key
   return(TimeToString(sessionTime,
                       TIME_DATE));
  }
  
//+------------------------------------------------------------------+
//| Get account currency digits                                      |
//+------------------------------------------------------------------+
int GetAccountCurrencyDigits()
  {
//--- Read the precision configured for the account currency
   ResetLastError();

   long currencyDigits =
      AccountInfoInteger(ACCOUNT_CURRENCY_DIGITS);

   int errorCode = GetLastError();

   if(errorCode != 0)
     {
      Print("Prop Firm Guard: Could not read account currency digits. Error: ",
            errorCode);

      return(-1);
     }

//--- Reject an invalid precision returned by the terminal
   if(currencyDigits < 0 ||
      currencyDigits > 8)
     {
      Print("Prop Firm Guard: Account currency digits are outside the supported range.");

      return(-1);
     }

   return((int)currencyDigits);
  }
  
//+------------------------------------------------------------------+
//| Format account monetary value                                    |
//+------------------------------------------------------------------+
bool FormatAccountMoney(const double value,
                        string       &formattedValue)
  {
//--- Reject invalid numeric input
   if(!MathIsValidNumber(value))
     {
      Print("Prop Firm Guard: Cannot format an invalid monetary value.");

      return(false);
     }

//--- Read the account currency precision
   int currencyDigits = GetAccountCurrencyDigits();

   if(currencyDigits < 0)
      return(false);

//--- Format the value using the account currency precision
   formattedValue = DoubleToString(value,
                                   currencyDigits);

   return(true);
  }
  
//+------------------------------------------------------------------+
//| Parse starting balance                                           |
//+------------------------------------------------------------------+
bool ParseStartingBalance(const string balanceText,
                          double       &startingBalance)
  {
//--- Start with a neutral output value
   startingBalance = 0.0;

//--- Remove surrounding whitespace before validation
   string normalizedText = balanceText;

   StringTrimLeft(normalizedText);
   StringTrimRight(normalizedText);

   int textLength = StringLen(normalizedText);

   if(textLength == 0)
      return(false);

   bool decimalPointFound = false;
   int  digitCount = 0;
   int  fractionalDigits = 0;

//--- Validate the complete input before numeric conversion
   for(int i = 0; i < textLength; i++)
     {
      ushort character =
         (ushort)StringGetCharacter(normalizedText,
                                    i);

      if(character >= '0' &&
         character <= '9')
        {
         digitCount++;

         if(decimalPointFound)
            fractionalDigits++;

         continue;
        }

      if(character == '.')
        {
         if(decimalPointFound)
            return(false);

         if(i == 0 ||
            i == textLength - 1)
            return(false);

         decimalPointFound = true;

         continue;
        }

      return(false);
     }

   if(digitCount == 0)
      return(false);

//--- Enforce the account currency precision
   int currencyDigits = GetAccountCurrencyDigits();

   if(currencyDigits < 0)
      return(false);

   if(fractionalDigits > currencyDigits)
      return(false);

//--- Convert only after the whole string has passed validation
   double parsedValue =
      StringToDouble(normalizedText);

   if(!MathIsValidNumber(parsedValue) ||
      parsedValue <= 0.0)
      return(false);

   startingBalance = parsedValue;

   return(true);
  }
  
//+------------------------------------------------------------------+
//| Check daily session state consistency                            |
//+------------------------------------------------------------------+
bool IsDailySessionStateConsistent(const SDailySession &session)
  {
//--- An unconfirmed session must remain in the waiting state
   if(session.status == SESSION_AWAITING_CONFIRMATION)
      return(!session.balanceConfirmed);

//--- An active session requires a confirmed daily baseline
   if(session.status == SESSION_ACTIVE)
      return(session.balanceConfirmed);

//--- A closed session may have ended with or without confirmation
   if(session.status == SESSION_CLOSED)
      return(true);

   return(false);
  }

//+------------------------------------------------------------------+
//| Open database                                                    |
//+------------------------------------------------------------------+
bool OpenDatabase()
  {
//--- Open or create the SQLite database
   ResetLastError();

   g_database = DatabaseOpen(g_databaseName,
                             DATABASE_OPEN_READWRITE |
                             DATABASE_OPEN_CREATE);

   if(g_database == INVALID_HANDLE)
     {
      Print("Prop Firm Guard: Could not open database ",
            g_databaseName,
            ". Error: ",
            GetLastError());

      return(false);
     }

   Print("Prop Firm Guard: Database opened successfully: ",
         g_databaseName);

   return(true);
  }

//+------------------------------------------------------------------+
//| Close database                                                   |
//+------------------------------------------------------------------+
void CloseDatabase()
  {
//--- Ignore the request when no database connection is active
   if(g_database == INVALID_HANDLE)
      return;

//--- Close the active SQLite connection
   ResetLastError();

   DatabaseClose(g_database);

   int errorCode = GetLastError();

   if(errorCode != 0)
     {
      Print("Prop Firm Guard: Database close reported error: ",
            errorCode);
     }
   else
     {
      Print("Prop Firm Guard: Database closed successfully.");
     }

//--- Clear the stored database handle
   g_database = INVALID_HANDLE;
  }

//+------------------------------------------------------------------+
//| Ensure database tables exist                                     |
//+------------------------------------------------------------------+
bool EnsureDatabaseTables()
  {
//--- Require an active SQLite connection before creating tables
   if(g_database == INVALID_HANDLE)
     {
      Print("Prop Firm Guard: Cannot ensure database tables without an active database.");

      return(false);
     }

//--- Define persistent storage for each account/server pair
   string settingsTable =
      "CREATE TABLE IF NOT EXISTS settings ("
      "account_login INTEGER NOT NULL,"
      "account_server TEXT NOT NULL,"
      "initial_balance REAL NOT NULL,"
      "daily_drawdown_percent REAL NOT NULL,"
      "overall_drawdown_percent REAL NOT NULL,"
      "profit_target_percent REAL NOT NULL,"
      "updated_at INTEGER NOT NULL,"
      "PRIMARY KEY(account_login, account_server)"
      ");";

//--- Define persistent storage for each configured daily session
   string dailySessionsTable =
      "CREATE TABLE IF NOT EXISTS daily_sessions ("
      "account_login INTEGER NOT NULL,"
      "account_server TEXT NOT NULL,"
      "session_date TEXT NOT NULL,"
      "starting_balance REAL NOT NULL,"
      "starting_equity REAL NOT NULL,"
      "balance_confirmed INTEGER NOT NULL,"
      "session_status INTEGER NOT NULL,"
      "created_at INTEGER NOT NULL,"
      "updated_at INTEGER NOT NULL,"
      "PRIMARY KEY(account_login, account_server, session_date)"
      ");";

//--- Ensure the existing account settings table is available
   ResetLastError();

   if(!DatabaseExecute(g_database,
                       settingsTable))
     {
      Print("Prop Firm Guard: Could not create settings table. Error: ",
            GetLastError());

      return(false);
     }

//--- Ensure the daily session table is available
   ResetLastError();

   if(!DatabaseExecute(g_database,
                       dailySessionsTable))
     {
      Print("Prop Firm Guard: Could not create daily_sessions table. Error: ",
            GetLastError());

      return(false);
     }

   return(true);
  }

//+------------------------------------------------------------------+
//| Finalize database request                                        |
//+------------------------------------------------------------------+
void FinalizeDatabaseRequest(const int request)
  {
//--- Ignore invalid database requests
   if(request == INVALID_HANDLE)
      return;

//--- Release the prepared database request
   ResetLastError();

   DatabaseFinalize(request);

   int errorCode = GetLastError();

   if(errorCode != 0)
     {
      Print("Prop Firm Guard: Could not finalize database request. Error: ",
            errorCode);
     }
  }

//+------------------------------------------------------------------+
//| Execute prepared database statement                              |
//+------------------------------------------------------------------+
bool ExecuteDatabaseRequest(const int request,
                            const string operation)
  {
//--- Execute the prepared database statement
   ResetLastError();

   bool result = DatabaseRead(request);

   int errorCode = GetLastError();

//--- Accept normal completion when no result row is returned
   bool success =
      (result || errorCode == ERR_DATABASE_NO_MORE_DATA);

   if(!success)
     {
      Print("Prop Firm Guard: Database error while ",
            operation,
            ". Error: ",
            errorCode);
     }

//--- Release the request after execution
   FinalizeDatabaseRequest(request);

   return(success);
  }

//+------------------------------------------------------------------+
//| Save account settings                                            |
//+------------------------------------------------------------------+
bool SaveAccountSettings()
  {
//--- Prepare the account-settings write statement
   string sql =
      "INSERT OR REPLACE INTO settings ("
      "account_login,"
      "account_server,"
      "initial_balance,"
      "daily_drawdown_percent,"
      "overall_drawdown_percent,"
      "profit_target_percent,"
      "updated_at"
      ") VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7);";

   int request = DatabasePrepare(g_database, sql);

   if(request == INVALID_HANDLE)
     {
      Print("Prop Firm Guard: Could not prepare settings save request. Error: ",
            GetLastError());

      return(false);
     }

//--- Bind the current account settings to the prepared statement
   if(!DatabaseBind(request, 0, g_accountSettings.accountLogin) ||
      !DatabaseBind(request, 1, g_accountSettings.accountServer) ||
      !DatabaseBind(request, 2, g_accountSettings.initialBalance) ||
      !DatabaseBind(request, 3, g_accountSettings.dailyDrawdownPercent) ||
      !DatabaseBind(request, 4, g_accountSettings.overallDrawdownPercent) ||
      !DatabaseBind(request, 5, g_accountSettings.profitTargetPercent) ||
      !DatabaseBind(request, 6, g_accountSettings.updatedAt))
     {
      Print("Prop Firm Guard: Could not bind settings values. Error: ",
            GetLastError());

      FinalizeDatabaseRequest(request);
      return(false);
     }

//--- Execute and finalize the prepared write request
   if(!ExecuteDatabaseRequest(request, "saving account settings"))
      return(false);

   return(true);
  }

//+------------------------------------------------------------------+
//| Load account settings                                            |
//+------------------------------------------------------------------+
bool LoadAccountSettings()
  {
//--- Build the current account/server lookup
   string accountServer = AccountInfoString(ACCOUNT_SERVER);

   string sql =
      "SELECT "
      "account_login,"
      "account_server,"
      "initial_balance,"
      "daily_drawdown_percent,"
      "overall_drawdown_percent,"
      "profit_target_percent,"
      "updated_at "
      "FROM settings "
      "WHERE account_login = ?1 AND account_server = ?2;";

   int request = DatabasePrepare(g_database, sql);

   if(request == INVALID_HANDLE)
     {
      Print("Prop Firm Guard: Could not prepare settings load request. Error: ",
            GetLastError());

      return(false);
     }

//--- Bind the current account identity
   if(!DatabaseBind(request, 0, g_accountState.login) ||
      !DatabaseBind(request, 1, accountServer))
     {
      Print("Prop Firm Guard: Could not bind settings search values. Error: ",
            GetLastError());

      FinalizeDatabaseRequest(request);
      return(false);
     }

//--- Read the matching settings record
   ResetLastError();

   if(!DatabaseRead(request))
     {
      int errorCode = GetLastError();

      FinalizeDatabaseRequest(request);

      //--- No row means this account/server pair has not been saved yet
      if(errorCode == ERR_DATABASE_NO_MORE_DATA)
         return(false);

      Print("Prop Firm Guard: Could not read account settings. Error: ",
            errorCode);

      return(false);
     }

//--- Read and validate the stored column values
   long   accountLogin;
   string storedServer;
   double initialBalance;
   double dailyDrawdown;
   double overallDrawdown;
   double profitTarget;
   long   updatedAt;

   if(!DatabaseColumnLong(request, 0, accountLogin) ||
      !DatabaseColumnText(request, 1, storedServer) ||
      !DatabaseColumnDouble(request, 2, initialBalance) ||
      !DatabaseColumnDouble(request, 3, dailyDrawdown) ||
      !DatabaseColumnDouble(request, 4, overallDrawdown) ||
      !DatabaseColumnDouble(request, 5, profitTarget) ||
      !DatabaseColumnLong(request, 6, updatedAt))
     {
      Print("Prop Firm Guard: Could not read stored settings columns. Error: ",
            GetLastError());

      FinalizeDatabaseRequest(request);
      return(false);
     }

//--- Restore the stored values into the account settings structure
   g_accountSettings.accountLogin           = accountLogin;
   g_accountSettings.accountServer          = storedServer;
   g_accountSettings.initialBalance         = initialBalance;
   g_accountSettings.dailyDrawdownPercent   = dailyDrawdown;
   g_accountSettings.overallDrawdownPercent = overallDrawdown;
   g_accountSettings.profitTargetPercent    = profitTarget;
   g_accountSettings.updatedAt              = (datetime)updatedAt;

//--- Release the completed read request
   FinalizeDatabaseRequest(request);

   return(true);
  }

//+------------------------------------------------------------------+
//| Initialize account settings                                      |
//+------------------------------------------------------------------+
bool InitializeAccountSettings()
  {
//--- Check whether this account/server pair already has stored settings
   bool settingsFound = LoadAccountSettings();

//--- Associate the settings with the current trading account
   g_accountSettings.accountLogin = g_accountState.login;
   g_accountSettings.accountServer = AccountInfoString(ACCOUNT_SERVER);

//--- Synchronize persistence with the current Inputs values
   g_accountSettings.initialBalance = InpInitialAccountBalance;
   g_accountSettings.dailyDrawdownPercent = InpDailyDrawdownPercent;
   g_accountSettings.overallDrawdownPercent = InpOverallDrawdownPercent;
   g_accountSettings.profitTargetPercent = InpProfitTargetPercent;
   g_accountSettings.updatedAt = TimeCurrent();

//--- Save the synchronized configuration
   if(!SaveAccountSettings())
      return(false);

//--- Report whether the record was created or synchronized
   if(settingsFound)
      Print("Prop Firm Guard: Account settings restored and synchronized.");
   else
      Print("Prop Firm Guard: New account settings saved.");

   return(true);
  }
  
//+------------------------------------------------------------------+
//| Save daily session                                               |
//+------------------------------------------------------------------+
bool SaveDailySession()
  {
//--- Require an active SQLite connection
   if(g_database == INVALID_HANDLE)
     {
      Print("Prop Firm Guard: Cannot save daily session without an active database.");

      return(false);
     }

//--- Reject an incomplete session identity
   if(g_dailySession.accountLogin <= 0 ||
      g_dailySession.accountServer == "" ||
      g_dailySession.sessionDate == "")
     {
      Print("Prop Firm Guard: Cannot save daily session with an incomplete identity.");

      return(false);
     }

//--- Prevent contradictory confirmation and lifecycle states
   if(!IsDailySessionStateConsistent(g_dailySession))
     {
      Print("Prop Firm Guard: Cannot save an inconsistent daily session state.");

      return(false);
     }

//--- Insert a new session or update only its mutable fields
   string sql =
      "INSERT INTO daily_sessions ("
      "account_login,"
      "account_server,"
      "session_date,"
      "starting_balance,"
      "starting_equity,"
      "balance_confirmed,"
      "session_status,"
      "created_at,"
      "updated_at"
      ") VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9) "
      "ON CONFLICT(account_login, account_server, session_date) "
      "DO UPDATE SET "
      "starting_balance = excluded.starting_balance,"
      "starting_equity = excluded.starting_equity,"
      "balance_confirmed = excluded.balance_confirmed,"
      "session_status = excluded.session_status,"
      "updated_at = excluded.updated_at;";

   ResetLastError();

   int request = DatabasePrepare(g_database,
                                 sql);

   if(request == INVALID_HANDLE)
     {
      Print("Prop Firm Guard: Could not prepare daily session save request. Error: ",
            GetLastError());

      return(false);
     }

//--- Bind the complete daily session to the prepared statement
   if(!DatabaseBind(request, 0, g_dailySession.accountLogin) ||
      !DatabaseBind(request, 1, g_dailySession.accountServer) ||
      !DatabaseBind(request, 2, g_dailySession.sessionDate) ||
      !DatabaseBind(request, 3, g_dailySession.startingBalance) ||
      !DatabaseBind(request, 4, g_dailySession.startingEquity) ||
      !DatabaseBind(request, 5, g_dailySession.balanceConfirmed ? 1 : 0) ||
      !DatabaseBind(request, 6, (int)g_dailySession.status) ||
      !DatabaseBind(request, 7, (long)g_dailySession.createdAt) ||
      !DatabaseBind(request, 8, (long)g_dailySession.updatedAt))
     {
      Print("Prop Firm Guard: Could not bind daily session values. Error: ",
            GetLastError());

      FinalizeDatabaseRequest(request);

      return(false);
     }

//--- Execute the UPSERT and release the prepared request
   if(!ExecuteDatabaseRequest(request,
                              "saving daily session"))
      return(false);

   return(true);
  }
  
//+------------------------------------------------------------------+
//| Load daily session                                               |
//+------------------------------------------------------------------+
ENUM_DAILY_SESSION_LOAD_RESULT LoadDailySession(const string sessionDate)
  {
//--- Require an active SQLite connection
   if(g_database == INVALID_HANDLE)
     {
      Print("Prop Firm Guard: Cannot load daily session without an active database.");

      return(SESSION_LOAD_ERROR);
     }

//--- Reject an empty session key
   if(sessionDate == "")
     {
      Print("Prop Firm Guard: Cannot load a daily session with an empty session date.");

      return(SESSION_LOAD_ERROR);
     }

//--- Build the current account and session lookup
   string accountServer = AccountInfoString(ACCOUNT_SERVER);

   string sql =
      "SELECT "
      "account_login,"
      "account_server,"
      "session_date,"
      "starting_balance,"
      "starting_equity,"
      "balance_confirmed,"
      "session_status,"
      "created_at,"
      "updated_at "
      "FROM daily_sessions "
      "WHERE account_login = ?1 "
      "AND account_server = ?2 "
      "AND session_date = ?3 "
      "LIMIT 1;";

   ResetLastError();

   int request = DatabasePrepare(g_database,
                                 sql);

   if(request == INVALID_HANDLE)
     {
      Print("Prop Firm Guard: Could not prepare daily session load request. Error: ",
            GetLastError());

      return(SESSION_LOAD_ERROR);
     }

//--- Bind the complete session identity
   if(!DatabaseBind(request, 0, g_accountState.login) ||
      !DatabaseBind(request, 1, accountServer) ||
      !DatabaseBind(request, 2, sessionDate))
     {
      Print("Prop Firm Guard: Could not bind daily session search values. Error: ",
            GetLastError());

      FinalizeDatabaseRequest(request);

      return(SESSION_LOAD_ERROR);
     }

//--- Attempt to read the matching session in the same database request
   ResetLastError();

   if(!DatabaseRead(request))
     {
      int errorCode = GetLastError();

      FinalizeDatabaseRequest(request);

      //--- Absence is a normal result when the configured day is new
      if(errorCode == ERR_DATABASE_NO_MORE_DATA)
         return(SESSION_LOAD_NOT_FOUND);

      Print("Prop Firm Guard: Could not read daily session. Error: ",
            errorCode);

      return(SESSION_LOAD_ERROR);
     }

//--- Read every column before changing the active in-memory session
   long   accountLogin;
   string storedServer;
   string storedSessionDate;
   double startingBalance;
   double startingEquity;
   int    balanceConfirmed;
   int    sessionStatus;
   long   createdAt;
   long   updatedAt;

   bool loaded =
      DatabaseColumnLong(request, 0, accountLogin) &&
      DatabaseColumnText(request, 1, storedServer) &&
      DatabaseColumnText(request, 2, storedSessionDate) &&
      DatabaseColumnDouble(request, 3, startingBalance) &&
      DatabaseColumnDouble(request, 4, startingEquity) &&
      DatabaseColumnInteger(request, 5, balanceConfirmed) &&
      DatabaseColumnInteger(request, 6, sessionStatus) &&
      DatabaseColumnLong(request, 7, createdAt) &&
      DatabaseColumnLong(request, 8, updatedAt);

   if(!loaded)
     {
      Print("Prop Firm Guard: Could not read daily session columns. Error: ",
            GetLastError());

      FinalizeDatabaseRequest(request);

      return(SESSION_LOAD_ERROR);
     }

//--- Release the completed read request
   FinalizeDatabaseRequest(request);

//--- Validate persisted boolean and enum representations
   if(balanceConfirmed != 0 &&
      balanceConfirmed != 1)
     {
      Print("Prop Firm Guard: Stored daily session has an invalid confirmation value.");

      return(SESSION_LOAD_ERROR);
     }

   if(sessionStatus < (int)SESSION_AWAITING_CONFIRMATION ||
      sessionStatus > (int)SESSION_CLOSED)
     {
      Print("Prop Firm Guard: Stored daily session has an invalid status value.");

      return(SESSION_LOAD_ERROR);
     }

//--- Build a temporary session before replacing the active state
   SDailySession loadedSession;

   loadedSession.accountLogin     = accountLogin;
   loadedSession.accountServer    = storedServer;
   loadedSession.sessionDate      = storedSessionDate;
   loadedSession.startingBalance  = startingBalance;
   loadedSession.startingEquity   = startingEquity;
   loadedSession.balanceConfirmed = (balanceConfirmed == 1);
   loadedSession.status =
      (ENUM_DAILY_SESSION_STATUS)sessionStatus;
   loadedSession.createdAt = (datetime)createdAt;
   loadedSession.updatedAt = (datetime)updatedAt;

//--- Reject a persisted state that contradicts its confirmation flag
   if(!IsDailySessionStateConsistent(loadedSession))
     {
      Print("Prop Firm Guard: Stored daily session contains an inconsistent state.");

      return(SESSION_LOAD_ERROR);
     }

//--- Restore the validated session only after the complete read succeeds
   g_dailySession = loadedSession;

   return(SESSION_LOAD_FOUND);
  }
  
//+------------------------------------------------------------------+
//| Initialize daily session                                         |
//+------------------------------------------------------------------+
bool InitializeDailySession()
  {
//--- Derive the session key from the configured reset boundary
   string sessionDate = GetCurrentSessionDate();

   if(sessionDate == "")
     {
      Print("Prop Firm Guard: Could not derive the current daily session date.");

      return(false);
     }

//--- Attempt to restore the session for the current account and day
   ENUM_DAILY_SESSION_LOAD_RESULT loadResult =
      LoadDailySession(sessionDate);

   if(loadResult == SESSION_LOAD_FOUND)
     {
      //--- Mark the restored session as available to the runtime
      g_hasDailySession = true;

      Print("Prop Firm Guard: Daily session restored for ",
            sessionDate,
            ".");

      return(true);
     }

//--- Stop initialization when the database lookup failed
   if(loadResult == SESSION_LOAD_ERROR)
     {
      Print("Prop Firm Guard: Could not restore the current daily session.");

      return(false);
     }

//--- Build a new unconfirmed session when no stored record exists
   datetime currentTime = TimeCurrent();

   g_dailySession.accountLogin     = g_accountState.login;
   g_dailySession.accountServer    = AccountInfoString(ACCOUNT_SERVER);
   g_dailySession.sessionDate      = sessionDate;
   g_dailySession.startingBalance  = 0.0;
   g_dailySession.startingEquity   = 0.0;
   g_dailySession.balanceConfirmed = false;
   g_dailySession.status           = SESSION_AWAITING_CONFIRMATION;
   g_dailySession.createdAt        = currentTime;
   g_dailySession.updatedAt        = currentTime;

//--- Persist the newly created session before exposing it as active
   if(!SaveDailySession())
     {
      Print("Prop Firm Guard: Could not save the new daily session.");

      g_hasDailySession = false;

      return(false);
     }

//--- Mark the persisted session as available to the runtime
   g_hasDailySession = true;

   Print("Prop Firm Guard: New daily session created for ",
         sessionDate,
         ".");

   return(true);
  }
  
//+------------------------------------------------------------------+
//| Delete daily session controls                                    |
//+------------------------------------------------------------------+
bool DeleteDailySessionControls()
  {
   bool success = true;

//--- Remove the starting balance edit field when present
   if(ObjectFind(0,
                 g_startBalanceEdit) >= 0)
     {
      ResetLastError();

      if(!ObjectDelete(0,
                       g_startBalanceEdit))
        {
         Print("Prop Firm Guard: Could not delete starting balance field. Error: ",
               GetLastError());

         success = false;
        }
     }

//--- Remove the confirmation button when present
   if(ObjectFind(0,
                 g_confirmButton) >= 0)
     {
      ResetLastError();

      if(!ObjectDelete(0,
                       g_confirmButton))
        {
         Print("Prop Firm Guard: Could not delete confirmation button. Error: ",
               GetLastError());

         success = false;
        }
     }

   return(success);
  }
  
//+------------------------------------------------------------------+
//| Create starting balance edit                                     |
//+------------------------------------------------------------------+
bool CreateStartingBalanceEdit(const int    x,
                               const int    y,
                               const string suggestedBalance)
  {
//--- Create the editable starting balance field
   ResetLastError();

   if(!ObjectCreate(0,
                    g_startBalanceEdit,
                    OBJ_EDIT,
                    0,
                    0,
                    0))
     {
      Print("Prop Firm Guard: Could not create starting balance field. Error: ",
            GetLastError());

      return(false);
     }

//--- Configure the field used to review or change the suggestion
   if(!ObjectSetInteger(0,
                        g_startBalanceEdit,
                        OBJPROP_CORNER,
                        CORNER_LEFT_UPPER) ||
      !ObjectSetInteger(0,
                        g_startBalanceEdit,
                        OBJPROP_XDISTANCE,
                        x) ||
      !ObjectSetInteger(0,
                        g_startBalanceEdit,
                        OBJPROP_YDISTANCE,
                        y) ||
      !ObjectSetInteger(0,
                        g_startBalanceEdit,
                        OBJPROP_XSIZE,
                        120) ||
      !ObjectSetInteger(0,
                        g_startBalanceEdit,
                        OBJPROP_YSIZE,
                        20) ||
      !ObjectSetInteger(0,
                        g_startBalanceEdit,
                        OBJPROP_FONTSIZE,
                        9) ||
      !ObjectSetInteger(0,
                        g_startBalanceEdit,
                        OBJPROP_COLOR,
                        clrBlack) ||
      !ObjectSetInteger(0,
                        g_startBalanceEdit,
                        OBJPROP_BGCOLOR,
                        clrWhite) ||
      !ObjectSetInteger(0,
                        g_startBalanceEdit,
                        OBJPROP_BORDER_COLOR,
                        clrSilver) ||
      !ObjectSetInteger(0,
                        g_startBalanceEdit,
                        OBJPROP_ALIGN,
                        ALIGN_RIGHT) ||
      !ObjectSetInteger(0,
                        g_startBalanceEdit,
                        OBJPROP_HIDDEN,
                        true))
     {
      Print("Prop Firm Guard: Could not configure starting balance field. Error: ",
            GetLastError());

      if(!ObjectDelete(0,
                       g_startBalanceEdit))
         Print("Prop Firm Guard: Could not remove incomplete starting balance field.");

      return(false);
     }

//--- Apply the suggested balance and font
   if(!ObjectSetString(0,
                       g_startBalanceEdit,
                       OBJPROP_FONT,
                       "Tahoma") ||
      !ObjectSetString(0,
                       g_startBalanceEdit,
                       OBJPROP_TEXT,
                       suggestedBalance))
     {
      Print("Prop Firm Guard: Could not initialize starting balance field. Error: ",
            GetLastError());

      if(!ObjectDelete(0,
                       g_startBalanceEdit))
         Print("Prop Firm Guard: Could not remove incomplete starting balance field.");

      return(false);
     }

   return(true);
  }
  
//+------------------------------------------------------------------+
//| Create confirm balance button                                    |
//+------------------------------------------------------------------+
bool CreateConfirmBalanceButton(const int x,
                                const int y)
  {
//--- Create the action control for daily balance confirmation
   ResetLastError();

   if(!ObjectCreate(0,
                    g_confirmButton,
                    OBJ_BUTTON,
                    0,
                    0,
                    0))
     {
      Print("Prop Firm Guard: Could not create confirmation button. Error: ",
            GetLastError());

      return(false);
     }

//--- Configure the confirmation button
   if(!ObjectSetInteger(0,
                        g_confirmButton,
                        OBJPROP_CORNER,
                        CORNER_LEFT_UPPER) ||
      !ObjectSetInteger(0,
                        g_confirmButton,
                        OBJPROP_XDISTANCE,
                        x) ||
      !ObjectSetInteger(0,
                        g_confirmButton,
                        OBJPROP_YDISTANCE,
                        y) ||
      !ObjectSetInteger(0,
                        g_confirmButton,
                        OBJPROP_XSIZE,
                        100) ||
      !ObjectSetInteger(0,
                        g_confirmButton,
                        OBJPROP_YSIZE,
                        20) ||
      !ObjectSetInteger(0,
                        g_confirmButton,
                        OBJPROP_FONTSIZE,
                        9) ||
      !ObjectSetInteger(0,
                        g_confirmButton,
                        OBJPROP_COLOR,
                        clrBlack) ||
      !ObjectSetInteger(0,
                        g_confirmButton,
                        OBJPROP_BGCOLOR,
                        clrWhite) ||
      !ObjectSetInteger(0,
                        g_confirmButton,
                        OBJPROP_BORDER_COLOR,
                        clrSilver) ||
      !ObjectSetInteger(0,
                        g_confirmButton,
                        OBJPROP_HIDDEN,
                        true))
     {
      Print("Prop Firm Guard: Could not configure confirmation button. Error: ",
            GetLastError());

      if(!ObjectDelete(0,
                       g_confirmButton))
         Print("Prop Firm Guard: Could not remove incomplete confirmation button.");

      return(false);
     }

//--- Apply the button label and font
   if(!ObjectSetString(0,
                       g_confirmButton,
                       OBJPROP_FONT,
                       "Tahoma") ||
      !ObjectSetString(0,
                       g_confirmButton,
                       OBJPROP_TEXT,
                       "Confirm"))
     {
      Print("Prop Firm Guard: Could not initialize confirmation button. Error: ",
            GetLastError());

      if(!ObjectDelete(0,
                       g_confirmButton))
         Print("Prop Firm Guard: Could not remove incomplete confirmation button.");

      return(false);
     }

   return(true);
  }
  
//+------------------------------------------------------------------+
//| Synchronize daily session controls                               |
//+------------------------------------------------------------------+
bool SynchronizeDailySessionControls()
  {
//--- Require a loaded session before changing its interface
   if(!g_hasDailySession)
     {
      Print("Prop Firm Guard: Cannot synchronize controls without a daily session.");

      return(false);
     }

//--- Confirmed sessions must not expose confirmation controls
   if(g_dailySession.balanceConfirmed)
      return(DeleteDailySessionControls());

//--- Preserve an existing complete control set and any edited text
   bool editExists =
      (ObjectFind(0,
                  g_startBalanceEdit) >= 0);

   bool buttonExists =
      (ObjectFind(0,
                  g_confirmButton) >= 0);

   if(editExists &&
      buttonExists)
      return(true);

//--- Remove a partial or stale owned control set before rebuilding
   if(editExists ||
      buttonExists)
     {
      if(!DeleteDailySessionControls())
         return(false);
     }

//--- Format the current balance only when a new field is required
   string suggestedBalance;

   if(!FormatAccountMoney(g_accountState.balance,
                          suggestedBalance))
     {
      Print("Prop Firm Guard: Could not format the suggested starting balance.");

      return(false);
     }

   int controlX = InpDashboardX + 18;
   int controlY = InpDashboardY + 120;

//--- Build the complete confirmation interface
   if(!CreateStartingBalanceEdit(controlX,
                                 controlY,
                                 suggestedBalance))
      return(false);

   if(!CreateConfirmBalanceButton(controlX + 130,
                                  controlY))
     {
      DeleteDailySessionControls();

      return(false);
     }

//--- Refresh the chart after the complete control set is created
   ChartRedraw(0);

   return(true);
  }
  
//+------------------------------------------------------------------+
//| Confirm daily starting balance                                   |
//+------------------------------------------------------------------+
bool ConfirmDailyStartingBalance()
  {
//--- Require an initialized daily session
   if(!g_hasDailySession)
     {
      Print("Prop Firm Guard: Cannot confirm a starting balance without a daily session.");

      return(false);
     }

//--- Accept confirmation only while the session is awaiting it
   if(g_dailySession.status != SESSION_AWAITING_CONFIRMATION)
     {
      Print("Prop Firm Guard: Current daily session is not awaiting balance confirmation.");

      return(false);
     }

//--- Protect an already confirmed baseline from accidental overwrite
   if(g_dailySession.balanceConfirmed)
     {
      Print("Prop Firm Guard: Daily starting balance is already confirmed.");

      return(false);
     }

//--- Require the starting balance field to exist
   if(ObjectFind(0,
                 g_startBalanceEdit) < 0)
     {
      Print("Prop Firm Guard: Starting balance field is not available.");

      return(false);
     }

//--- Read the complete text entered by the trader
   string balanceText;

   ResetLastError();

   if(!ObjectGetString(0,
                       g_startBalanceEdit,
                       OBJPROP_TEXT,
                       0,
                       balanceText))
     {
      Print("Prop Firm Guard: Could not read starting balance input. Error: ",
            GetLastError());

      return(false);
     }

//--- Validate the complete input before changing session state
   double startingBalance = 0.0;

   if(!ParseStartingBalance(balanceText,
                            startingBalance))
     {
      Print("Prop Firm Guard: Starting balance must be a valid positive monetary value.");

      return(false);
     }

//--- Preserve the previous session state for persistence rollback
   SDailySession previousSession = g_dailySession;

//--- Refresh live account values immediately before capturing equity
   UpdateAccountState();

//--- Convert the waiting session into a confirmed active session
   g_dailySession.startingBalance  = startingBalance;
   g_dailySession.startingEquity   = g_accountState.equity;
   g_dailySession.balanceConfirmed = true;
   g_dailySession.status           = SESSION_ACTIVE;
   g_dailySession.updatedAt        = TimeCurrent();

//--- Persist the confirmed state before changing presentation state
   if(!SaveDailySession())
     {
      //--- Restore the previous in-memory state after persistence failure
      g_dailySession = previousSession;

      Print("Prop Firm Guard: Starting balance confirmation was not saved. "
            "The previous session state has been restored.");

      return(false);
     }

//--- Format the confirmed monetary values for reporting
   string formattedBalance;
   string formattedEquity;

   if(!FormatAccountMoney(g_dailySession.startingBalance,
                          formattedBalance))
      formattedBalance = DoubleToString(g_dailySession.startingBalance);

   if(!FormatAccountMoney(g_dailySession.startingEquity,
                          formattedEquity))
      formattedEquity = DoubleToString(g_dailySession.startingEquity);

//--- Synchronize presentation only after persistence succeeds
   if(!SynchronizeDailySessionControls())
     {
      Print("Prop Firm Guard: Starting balance was confirmed and saved, "
            "but the confirmation controls could not be synchronized.");

      return(true);
     }

   Print("Prop Firm Guard: Daily starting balance confirmed at ",
         formattedBalance,
         ". Equity captured at confirmation: ",
         formattedEquity,
         ".");

   return(true);
  }
  
//+------------------------------------------------------------------+
//| Check for new trading day                                        |
//+------------------------------------------------------------------+
bool CheckForNewTradingDay()
  {
//--- Require an initialized daily session before checking rollover
   if(!g_hasDailySession)
     {
      Print("Prop Firm Guard: Cannot check session rollover without a daily session.");

      return(false);
     }

//--- Derive the session key from the currently known server time
   string currentSessionDate = GetCurrentSessionDate();

   if(currentSessionDate == "")
     {
      Print("Prop Firm Guard: Could not derive the current session date.");

      return(false);
     }

//--- Keep the current session while its configured day is unchanged
   if(currentSessionDate == g_dailySession.sessionDate)
      return(true);

//--- Preserve the active state in case closing persistence fails
   SDailySession previousSession = g_dailySession;

//--- Close the previous session before changing the active day
   g_dailySession.status    = SESSION_CLOSED;
   g_dailySession.updatedAt = TimeCurrent();

   if(!SaveDailySession())
     {
      g_dailySession = previousSession;

      Print("Prop Firm Guard: Could not close daily session ",
            previousSession.sessionDate,
            ". Rollover has been postponed.");

      return(false);
     }

//--- Preserve the exact closed state that was successfully persisted
   SDailySession closedSession = g_dailySession;

   g_hasDailySession = false;

//--- Restore or create the session for the new configured day
   if(!InitializeDailySession())
     {
      g_dailySession    = closedSession;
      g_hasDailySession = true;

      if(!DeleteDailySessionControls())
         Print("Prop Firm Guard: Could not remove stale session controls after rollover failure.");

      Print("Prop Firm Guard: Previous session was closed, but the new daily session could not be initialized.");

      return(false);
     }

   Print("Prop Firm Guard: Daily session rollover completed from ",
         previousSession.sessionDate,
         " to ",
         g_dailySession.sessionDate,
         ".");

   return(true);
  }

//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- Validate the complete Part 1 and Part 2 input configuration
   if(!ValidateComplianceInputs())
      return(INIT_PARAMETERS_INCORRECT);

//--- Refresh the account identity and current financial state
   UpdateAccountState();

//--- Enforce one Prop Firm Guard instance for the trading account
   if(!AcquireInstanceLock())
      return(INIT_FAILED);

//--- Open the SQLite persistence layer
   if(!OpenDatabase())
     {
      Print("Prop Firm Guard: Database initialization failed.");

      if(!ReleaseInstanceLock())
         Print("Prop Firm Guard: Instance lock cleanup was incomplete.");

      return(INIT_FAILED);
     }

//--- Ensure all persistence tables required through Part 2 exist
   if(!EnsureDatabaseTables())
     {
      Print("Prop Firm Guard: Could not initialize database tables.");

      CloseDatabase();

      if(!ReleaseInstanceLock())
         Print("Prop Firm Guard: Instance lock cleanup was incomplete.");

      return(INIT_FAILED);
     }

//--- Restore and synchronize the Part 1 account settings
   if(!InitializeAccountSettings())
     {
      Print("Prop Firm Guard: Could not initialize account settings.");

      CloseDatabase();

      if(!ReleaseInstanceLock())
         Print("Prop Firm Guard: Instance lock cleanup was incomplete.");

      return(INIT_FAILED);
     }

//--- Restore or create the current configured daily session
   if(!InitializeDailySession())
     {
      Print("Prop Firm Guard: Could not initialize daily session.");

      CloseDatabase();

      if(!ReleaseInstanceLock())
         Print("Prop Firm Guard: Instance lock cleanup was incomplete.");

      return(INIT_FAILED);
     }

//--- Match the confirmation controls to the current session state
   if(!SynchronizeDailySessionControls())
     {
      Print("Prop Firm Guard: Could not synchronize daily session controls.");

      if(!DeleteDailySessionControls())
         Print("Prop Firm Guard: Daily session control cleanup was incomplete.");

      CloseDatabase();

      if(!ReleaseInstanceLock())
         Print("Prop Firm Guard: Instance lock cleanup was incomplete.");

      return(INIT_FAILED);
     }

//--- Start periodic daily session maintenance
   ResetLastError();

   if(!EventSetTimer(InpTimerSeconds))
     {
      Print("Prop Firm Guard: Could not start the session timer. Error: ",
            GetLastError());

      if(!DeleteDailySessionControls())
         Print("Prop Firm Guard: Daily session control cleanup was incomplete.");

      CloseDatabase();

      if(!ReleaseInstanceLock())
         Print("Prop Firm Guard: Instance lock cleanup was incomplete.");

      return(INIT_FAILED);
     }

   Print("Prop Firm Guard initialized successfully.");

   return(INIT_SUCCEEDED);
  }

//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
//--- Stop periodic session maintenance first
   EventKillTimer();

//--- Remove chart objects owned by the Part 2 session workflow
   if(!DeleteDailySessionControls())
     {
      Print("Prop Firm Guard: Daily session control cleanup was incomplete.");
     }

//--- Close the SQLite persistence layer
   CloseDatabase();

//--- Release this trading account's terminal instance lock
   if(!ReleaseInstanceLock())
     {
      Print("Prop Firm Guard: Instance lock cleanup was incomplete.");
     }

//--- Record the MetaTrader deinitialization reason
   Print("Prop Firm Guard removed. Deinitialization reason: ",
         reason);
  }

//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
  {
  }
  
//+------------------------------------------------------------------+
//| Timer function                                                   |
//+------------------------------------------------------------------+
void OnTimer()
  {
//--- Refresh the account snapshot used by the session workflow
   UpdateAccountState();

//--- Maintain the configured daily session boundary
   if(!CheckForNewTradingDay())
     {
      Print("Prop Firm Guard: Daily session maintenance could not be completed.");

      return;
     }

//--- Keep chart controls aligned with the authoritative session state
   if(!SynchronizeDailySessionControls())
     {
      Print("Prop Firm Guard: Daily session controls could not be synchronized.");
     }
  }
  
//+------------------------------------------------------------------+
//| Chart event function                                             |
//+------------------------------------------------------------------+
void OnChartEvent(const int id,
                  const long &lparam,
                  const double &dparam,
                  const string &sparam)
  {
//--- Ignore events that are not graphical object clicks
   if(id != CHARTEVENT_OBJECT_CLICK)
      return;

//--- Ignore every chart object except the owned confirmation button
   if(sparam != g_confirmButton)
      return;

//--- Release the button's pressed visual state when it still exists
   if(ObjectFind(0,
                 g_confirmButton) >= 0)
     {
      ResetLastError();

      if(!ObjectSetInteger(0,
                           g_confirmButton,
                           OBJPROP_STATE,
                           false))
        {
         Print("Prop Firm Guard: Could not reset confirmation button state. Error: ",
               GetLastError());
        }
     }

//--- Delegate validation, state transition, and persistence
   ConfirmDailyStartingBalance();
  }
//+------------------------------------------------------------------+