//+------------------------------------------------------------------+
//|                                           StochasticSlow_Pro.mq5 |
//|                                          Copyright 2026, xxxxxxxx|
//+------------------------------------------------------------------+
#property copyright "Copyright 2026, xxxxxxxx"
#property version   "3.10" // Upgraded with dynamic high-performance Standard/MTF support
#property description "Professional Slow Stochastic with selectable MA types and"
#property description "candle source (Standard or Heikin Ashi)."

//--- Indicator Window and Plot Properties ---
#property indicator_separate_window
#property indicator_buffers 2 // %K and %D
#property indicator_plots   2
#property indicator_level1 10.0
#property indicator_level2 20.0
#property indicator_level3 50.0
#property indicator_level4 80.0
#property indicator_level5 90.0
#property indicator_minimum 0.0
#property indicator_maximum 100.0

//--- Plot 1: %K line
#property indicator_label1  "%K"
#property indicator_type1   DRAW_LINE
#property indicator_color1  clrLightSeaGreen
#property indicator_style1  STYLE_SOLID
#property indicator_width1  1

//--- Plot 2: %D line
#property indicator_label2  "%D"
#property indicator_type2   DRAW_LINE
#property indicator_color2  clrLightCoral
#property indicator_style2  STYLE_SOLID
#property indicator_width2  1

//--- Include the calculator engine ---
#include <MyIncludes\StochasticSlow_Calculator.mqh>
#include <MyIncludes\DataSync_Tools.mqh> // Centralized MTF synchronization daemon

//--- Enum for selecting the candle source for calculation ---
enum ENUM_CANDLE_SOURCE
  {
   CANDLE_STANDARD,      // Use standard OHLC data
   CANDLE_HEIKIN_ASHI    // Use Heikin Ashi smoothed data
  };

//--- Input Parameters ---
input group "--- Timeframe Settings ---"
input ENUM_TIMEFRAMES     InpTimeframe      = PERIOD_CURRENT;       // Target Higher Timeframe

input group "--- Stochastic Settings ---"
input int                InpKPeriod       = 5;
input int                InpSlowingPeriod = 3;
input ENUM_MA_TYPE       InpSlowingMAType = SMA;
input int                InpDPeriod       = 3;
input ENUM_MA_TYPE       InpDMAType       = SMA;
input ENUM_CANDLE_SOURCE InpCandleSource  = CANDLE_STANDARD;

//--- Indicator Buffers ---
double    BufferK[];
double    BufferD[];

//--- Internal HTF Data Caches
double    h_open[], h_high[], h_low[], h_close[];
double    h_res_k[], h_res_d[];
datetime  h_time[];

//--- Global Objects & Synchronizer State
CStochasticSlowCalculator *g_calculator;

bool            g_is_mtf_mode         = false;
ENUM_TIMEFRAMES g_calc_timeframe;
bool            g_data_ready          = false;
bool            g_data_synced         = false;
int             g_htf_count           = 0;
datetime        g_last_htf_time       = 0;

//+------------------------------------------------------------------+
//| Custom indicator initialization function.                        |
//+------------------------------------------------------------------+
int OnInit()
  {
   g_data_ready    = false;
   g_data_synced   = false;
   g_htf_count     = 0;
   g_last_htf_time = 0;

//--- 1. Resolve Timeframe and validate direction
   g_calc_timeframe = InpTimeframe;
   if(g_calc_timeframe == PERIOD_CURRENT)
      g_calc_timeframe = (ENUM_TIMEFRAMES)Period();

   if(g_calc_timeframe < Period())
     {
      PrintFormat("Critical Error: Target timeframe (%s) must be >= current timeframe (%s).",
                  EnumToString(g_calc_timeframe), EnumToString(Period()));
      return(INIT_FAILED);
     }
   g_is_mtf_mode = (g_calc_timeframe > Period());

//--- 2. Bind buffers to index mapping
   SetIndexBuffer(0, BufferK, INDICATOR_DATA);
   SetIndexBuffer(1, BufferD, INDICATOR_DATA);

//--- Force strict chronological alignment (false = old to new)
   ArraySetAsSeries(BufferK, false);
   ArraySetAsSeries(BufferD, false);

//--- 3. Factory Logic for Heikin Ashi price routing
   switch(InpCandleSource)
     {
      case CANDLE_HEIKIN_ASHI:
         g_calculator = new CStochasticSlowCalculator_HA();
         break;
      default:
         g_calculator = new CStochasticSlowCalculator();
         break;
     }

   if(CheckPointer(g_calculator) == POINTER_INVALID || !g_calculator.Init(InpKPeriod, InpSlowingPeriod, InpSlowingMAType, InpDPeriod, InpDMAType))
     {
      Print("Critical Error: Failed to create or initialize Slow Stochastic Calculator object.");
      return(INIT_FAILED);
     }

//--- 4. Dynamic Setup of Indicator Shortname and Plots
   string type = (InpCandleSource == CANDLE_HEIKIN_ASHI) ? " HA" : "";
   string tf_str = g_is_mtf_mode ? (" " + EnumToString(g_calc_timeframe)) : "";
   IndicatorSetString(INDICATOR_SHORTNAME, StringFormat("SlowStoch%s%s(%d,%d,%d)", type, tf_str, InpKPeriod, InpSlowingPeriod, InpDPeriod));

//--- Drawing offset configuration
   int draw_begin_k = InpKPeriod + InpSlowingPeriod - 2;
   int draw_begin_d = InpKPeriod + InpSlowingPeriod + InpDPeriod - 3;
   if(g_is_mtf_mode)
     {
      draw_begin_k = 0;
      draw_begin_d = 0;
     }

   PlotIndexSetInteger(0, PLOT_DRAW_BEGIN, draw_begin_k);
   PlotIndexSetInteger(1, PLOT_DRAW_BEGIN, draw_begin_d);
   IndicatorSetInteger(INDICATOR_DIGITS, 2);

//--- 5. Initialize Background Synchronization Timer Daemon (Only if MTF is active)
   if(g_is_mtf_mode)
      EventSetTimer(1);

   return(INIT_SUCCEEDED);
  }

//+------------------------------------------------------------------+
//| Custom indicator deinitialization function.                      |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
   EventKillTimer();
   if(CheckPointer(g_calculator) != POINTER_INVALID)
      delete g_calculator;
  }

//+------------------------------------------------------------------+
//| Custom indicator calculation function                            |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
   int required_bars = InpKPeriod + InpSlowingPeriod + InpDPeriod + 5;
   if(rates_total < required_bars)
      return 0;

   if(CheckPointer(g_calculator) == POINTER_INVALID)
      return 0;

//--- Force chronological indexing on current timeframe arrays
   ArraySetAsSeries(time,  false);
   ArraySetAsSeries(open,  false);
   ArraySetAsSeries(high,  false);
   ArraySetAsSeries(low,   false);
   ArraySetAsSeries(close, false);

//===================================================================
// MODE 1: Current Timeframe calculation (Standard ultra-high speed)
//===================================================================
   if(!g_is_mtf_mode)
     {
      g_calculator.Calculate(rates_total, prev_calculated, open, high, low, close, BufferK, BufferD);
      return(rates_total);
     }

//===================================================================
// MODE 2: Multi-Timeframe Engine (Warp-free step synchronization)
//===================================================================
   if(!CDataSync::EnsureHTFDataReady(_Symbol, g_calc_timeframe, required_bars))
     {
      g_data_synced = false;
      return 0; // Wait for next tick to let history synchronize
     }

   g_data_synced = true;

//--- Check if a new HTF candle has opened
   datetime htf_time_current = iTime(_Symbol, g_calc_timeframe, 0);
   bool htf_updated = (htf_time_current != g_last_htf_time);

   if(htf_updated || prev_calculated == 0)
     {
      g_last_htf_time = htf_time_current;

      int htf_bars = iBars(_Symbol, g_calc_timeframe);
      if(htf_bars < required_bars)
        {
         g_data_ready = false;
         return 0;
        }

      g_htf_count = MathMin(htf_bars, 3000); // Guard rails to prevent memory overload

      // Resize all HTF caching arrays
      ArrayResize(h_time,    g_htf_count);
      ArrayResize(h_open,    g_htf_count);
      ArrayResize(h_high,    g_htf_count);
      ArrayResize(h_low,     g_htf_count);
      ArrayResize(h_close,   g_htf_count);
      ArrayResize(h_res_k,   g_htf_count);
      ArrayResize(h_res_d,   g_htf_count);

      // Force chronological structure on high-level arrays
      ArraySetAsSeries(h_time,    false);
      ArraySetAsSeries(h_open,    false);
      ArraySetAsSeries(h_high,    false);
      ArraySetAsSeries(h_low,     false);
      ArraySetAsSeries(h_close,   false);
      ArraySetAsSeries(h_res_k,   false);
      ArraySetAsSeries(h_res_d,   false);

      // Copy basic pricing data
      if(CopyTime(_Symbol,  g_calc_timeframe, 0, g_htf_count, h_time)  != g_htf_count ||
         CopyOpen(_Symbol,  g_calc_timeframe, 0, g_htf_count, h_open)  != g_htf_count ||
         CopyHigh(_Symbol,  g_calc_timeframe, 0, g_htf_count, h_high)  != g_htf_count ||
         CopyLow(_Symbol,   g_calc_timeframe, 0, g_htf_count, h_low)   != g_htf_count ||
         CopyClose(_Symbol, g_calc_timeframe, 0, g_htf_count, h_close) != g_htf_count)
        {
         g_data_ready = false;
         return 0;
        }

      //--- Calculate core indicators directly on high timeframe (Initial setup)
      g_calculator.Calculate(g_htf_count, 0, h_open, h_high, h_low, h_close, h_res_k, h_res_d);

      g_data_ready = true;
     }

   if(!g_data_ready)
      return 0;

//--- 5. Real-Time Update for the active forming HTF candle (Index: g_htf_count - 1) on every tick
   int live_idx = g_htf_count - 1;
   if(live_idx >= required_bars)
     {
      double o[1], h[1], l[1], c[1];
      int shift = iBarShift(_Symbol, g_calc_timeframe, htf_time_current, false);
      if(shift >= 0 &&
         CopyOpen(_Symbol,  g_calc_timeframe, shift, 1, o) == 1 &&
         CopyHigh(_Symbol,  g_calc_timeframe, shift, 1, h) == 1 &&
         CopyLow(_Symbol,   g_calc_timeframe, shift, 1, l) == 1 &&
         CopyClose(_Symbol, g_calc_timeframe, shift, 1, c) == 1)
        {
         h_open[live_idx]  = o[0];
         h_high[live_idx]  = h[0];
         h_low[live_idx]   = l[0];
         h_close[live_idx] = c[0];

         // Stateful, O(1) mock update for the live bar
         g_calculator.Calculate(g_htf_count, g_htf_count, h_open, h_high, h_low, h_close, h_res_k, h_res_d);
        }
     }

//--- 6. Warp-free step force (Staircase Solution anchor determination)
   int start = (prev_calculated > 0) ? prev_calculated - 1 : 0;

   int first_bar_of_forming_htf = rates_total - 1;
   while(first_bar_of_forming_htf > 0 &&
         iBarShift(_Symbol, g_calc_timeframe, time[first_bar_of_forming_htf], false) == 0)
     {
      first_bar_of_forming_htf--;
     }
   first_bar_of_forming_htf++; // Anchor set to start of current HTF period block

   if(start > first_bar_of_forming_htf)
      start = first_bar_of_forming_htf;

//--- 7. Map HTF Calculated results cleanly to the lower chart timeframe (O(1) complexity)
   for(int i = start; i < rates_total; i++)
     {
      datetime t = time[i];
      int shift_htf = iBarShift(_Symbol, g_calc_timeframe, t, false);

      if(shift_htf >= 0)
        {
         int idx_htf = g_htf_count - 1 - shift_htf;
         if(idx_htf >= 0 && idx_htf < g_htf_count)
           {
            BufferK[i] = h_res_k[idx_htf];
            BufferD[i] = h_res_d[idx_htf];
           }
         else
           {
            BufferK[i] = EMPTY_VALUE;
            BufferD[i] = EMPTY_VALUE;
           }
        }
      else
        {
         BufferK[i] = EMPTY_VALUE;
         BufferD[i] = EMPTY_VALUE;
        }
     }

   return(rates_total);
  }

//+------------------------------------------------------------------+
//| OnTimer Event Handler                                            |
//+------------------------------------------------------------------+
void OnTimer()
  {
//--- Delegate asynchronous history checking and forced redraws to DataSync daemon using correct lookback period
   int required_bars = InpKPeriod + InpSlowingPeriod + InpDPeriod + 10;
   CDataSync::OnTimerUpdate(_Symbol, g_calc_timeframe, required_bars, g_data_synced);
  }
//+------------------------------------------------------------------+
//+------------------------------------------------------------------+