#ifndef AI_SESSION_MQH
#define AI_SESSION_MQH

#include "LabelUtils.mqh"

// ---------------------------------------------------------------------------
// AISession.mqh — Forex session detection + chart corner label
// Asia: 22:00-06:00 UTC | London: 07:00-12:00 UTC | NY: 13:00-17:00 UTC
// AMD: Accumulation | Manipulation | Distribution
// ---------------------------------------------------------------------------

string GetCurrentSession()
{
   datetime now = TimeCurrent();
   MqlDateTime dt;
   TimeToStruct(now, dt);
   int h = dt.hour;

   if(h >= 22 || h < 6)  return "Asia";
   if(h >= 7  && h < 12) return "London";
   if(h >= 13 && h < 17) return "NY";
   return "Interbank";
}

string GetCurrentSessionPhase(const string session_name)
{
   datetime now = TimeCurrent();
   MqlDateTime dt;
   TimeToStruct(now, dt);
   int h = dt.hour;
   string session = session_name;
   if(StringLen(session) == 0)
      session = GetCurrentSession();

   if(session == "Asia")
   {
      if(h >= 22 || h < 2) return "A";
      if(h >= 2  && h < 4) return "M";
      return "D";
   }
   if(session == "London")
   {
      if(h >= 7 && h < 9)  return "A";
      if(h >= 9 && h < 11) return "M";
      return "D";
   }
   if(session == "NY")
   {
      if(h >= 13 && h < 15) return "A";
      if(h >= 15 && h < 16) return "M";
      return "D";
   }

   if(h >= 6 && h < 7)   return "A";
   if(h >= 12 && h < 13)  return "M";
   if(h >= 17 && h < 22)  return "D";
   return "A";
}

void InitAISession()
{
   GW_Session_Name = GetCurrentSession();
   GW_Session_Phase = GetCurrentSessionPhase(GW_Session_Name);
   GW_Session_Confidence = 0.0;
   g_symbol_session_name = GW_Session_Name;
   g_symbol_session_phase = GW_Session_Phase;
   Last_GW_Session_Update = TimeCurrent();
}

void RefreshAISessionState()
{
   string session_name = GetCurrentSession();
   string local_phase  = GetCurrentSessionPhase(session_name);

   g_symbol_session_name = session_name;
   g_symbol_session_phase = local_phase;

   GW_Session_Name = session_name;

   if(!GW_Initialized || AI_Mode == "off" || Last_GW_Session_Update == 0 ||
      (TimeCurrent() - Last_GW_Session_Update) > (Session_Phase_Refresh_Seconds * 2))
   {
      GW_Session_Phase = local_phase;
      if(GW_Session_Confidence <= 0.0)
         GW_Session_Confidence = 50.0;
   }
   else if(StringLen(GW_Session_Phase) == 0)
   {
      GW_Session_Phase = local_phase;
   }
}

void UpdateSessionLabel()
{
   RefreshAISessionState();

   if(!AI_Session_Draw)
   {
      ObjectDelete(0, "GW_SESSION_LABEL");
      ObjectDelete(0, "GW_NEWS_LABEL");
      return;
   }

   // Session phase label
   string phase = StringLen(GW_Session_Phase) > 0 ? GW_Session_Phase : "?";
   string sess  = StringLen(GW_Session_Name)  > 0 ? GW_Session_Name  : GetCurrentSession();
   string text  = "  " + sess + " | " + phase;
   if(GW_Session_Confidence > 0.0)
      text += " (" + DoubleToString(GW_Session_Confidence, 0) + "%)";
   text += "  |  GW:" + GW_Status;

   VZ_DrawLabel("GW_SESSION_LABEL", 7, text, VZ_ColorFromPhase(phase), 9);

   // News headline label (if any)
   if(StringLen(GW_News_Headlines) > 0)
   {
      string ntext = "  News: " + StringSubstr(GW_News_Headlines, 0, 100);
      color ncolor = clrKhaki;
      if(News_Bias_Direction > 0) ncolor = clrLime;
      else if(News_Bias_Direction < 0) ncolor = clrRed;
      else if(News_Bias_Strength >= 70.0) ncolor = clrGold;
      else if(News_Bias_Strength >= 40.0) ncolor = clrOrange;
      VZ_DrawLabel("GW_NEWS_LABEL", 8, ntext, ncolor, 8);
   }
}

void CleanupSessionLabel()
{
   ObjectDelete(0, "GW_SESSION_LABEL");
   ObjectDelete(0, "GW_NEWS_LABEL");
}

#endif