//+------------------------------------------------------------------+
//|                                                       Warrior_EA |
//|                                                     AnimateDread |
//|                                                                  |
//| THE PER-CONFIG CHART LOCK. STATELESS-except-one-field, same       |
//| doctrine as BarrierHorizon\BarrierHorizon.mqh: m_configLockName   |
//| is genuinely exclusive (grep-verified against the rest of         |
//| Expert\ - nothing outside Lifecycle.mqh ever touched it), so this |
//| collaborator owns it as a real member instead of reaching it      |
//| through the view. Every method below is a pure relocation of      |
//| Expert\AIBase\Lifecycle.mqh's original AcquireConfigLock/         |
//| ReleaseConfigLock bodies - same order, same conditionals, no      |
//| logic changes (the repeated m_activeFileName reads are cached to  |
//| one local, since the view call replaces a direct field read that  |
//| was itself invariant for the duration of the call). AcquireConfigLock |
//| has exactly one external caller (Topology.mqh, grep-verified),    |
//| which keeps calling it unqualified - nothing to rewire.           |
//+------------------------------------------------------------------+
#ifndef WARRIOR_CONFIGLOCK_CONFIGLOCK_MQH
#define WARRIOR_CONFIGLOCK_CONFIGLOCK_MQH
//--- Set when a start is refused for a reason no retry can change. OnInit's retry loop (Warrior_EA.mq5)
//--- reads it so the operator's LAST log line names the cause instead of "Failed to initialize Indicators".
string g_initFatalReason = "";
class CConfigLock
  {
private:
   CConfigLockView    *m_view;   // BORROWED - the signal owns the adapter, not the reverse
   string              m_configLockName;
public:
                     CConfigLock(void) : m_view(NULL), m_configLockName("") { }
   void              Bind(CConfigLockView *view) { m_view = view; }

   bool              Acquire(void);
   void              Release(void);
  };
//+------------------------------------------------------------------+
//| Claim the resolved model filename for this chart, terminal-wide. |
//+------------------------------------------------------------------+
bool CConfigLock::Acquire(void)
  {
   string activeFileName = m_view.ActiveFileName();
   //--- FNV-1a over the resolved filename: every retrain-affecting input is already folded into that
   //--- name, so equal names mean genuinely equal configs and nothing else has to be compared. Hashed
   //--- because MQL5 caps global-variable names at 63 characters and the path alone exceeds that.
   uint h = 2166136261;
   int len = StringLen(activeFileName);
   for(int i = 0; i < len; i++)
     {
      h ^= (uint)StringGetCharacter(activeFileName, i);
      h *= 16777619;
     }
   string name = "WarriorAI_" + m_view.ShortId() + "_" + StringFormat("%08x", h);
   long self = ChartID();
   //--- Atomic: true means it did not exist and is now ours.
   if(GlobalVariableTemp(name))
     {
      GlobalVariableSet(name, (double)self);
      m_configLockName = name;
      return true;
     }
   long owner = (long)GlobalVariableGet(name);
   //--- Our own entry: this chart is re-initializing after a parameter change or a recompile whose
   //--- OnDeinit never reached Release(). Reclaim it instead of refusing to start.
   if(owner == self)
     {
      m_configLockName = name;
      return true;
     }
   //--- Owner recorded but its chart no longer runs an expert - take the claim over. owner == 0 is
   //--- deliberately NOT treated as stale: it means another instance created the variable microseconds
   //--- ago and has not stamped its id yet, which is a live claim, not a dead one.
   bool ownerAlive = false;
   if(owner != 0)
     {
      long id = ChartFirst();
      while(id >= 0)
        {
         if(id == owner)
           {
            ownerAlive = (StringLen(ChartGetString(id, CHART_EXPERT_NAME)) > 0);
            break;
           }
         id = ChartNext(id);
        }
     }
   if(owner != 0 && !ownerAlive)
     {
      GlobalVariableSet(name, (double)self);
      m_configLockName = name;
      return true;
     }
   Print(m_view.Id() + ": REFUSED to start - another chart is already training this exact configuration. Both" +
         " would save into the same files (" + activeFileName + ".nnw plus its .cfg/.stats/checkpoints)" +
         " and overwrite each other's progress with no error reported anywhere. Owner: " +
         (owner != 0 ? "chart " + IntegerToString(owner) + " (" + ChartSymbol(owner) + " " +
          EnumToString((ENUM_TIMEFRAMES)ChartPeriod(owner)) + ")" : "another chart, still initializing") +
         ". Change the enabled NN set (Use_MLP/Use_CONV/Use_LSTM/Use_CONVLSTM) or any retrain-affecting" +
         " input on THIS chart so it trains its own model, or remove one of the two charts. Note the" +
         " private build defaults ALL FOUR direction NNs on - two same-symbol charts left at their" +
         " defaults land here.");
   g_initFatalReason = "another chart already owns this configuration (" + activeFileName + ")";
   return false;
  }
//+------------------------------------------------------------------+
//| Drop this instance's claim (see Acquire).                        |
//+------------------------------------------------------------------+
void CConfigLock::Release(void)
  {
   if(StringLen(m_configLockName) == 0)
      return;
   //--- Only delete a claim we still hold: if a later instance took this entry over via the stale-owner
   //--- path above, deleting it here would silently hand the config to a third chart.
   if((long)GlobalVariableGet(m_configLockName) == ChartID())
      GlobalVariableDel(m_configLockName);
   m_configLockName = "";
  }
#endif // WARRIOR_CONFIGLOCK_CONFIGLOCK_MQH
//+------------------------------------------------------------------+