//+------------------------------------------------------------------+
//|                                             GQ_RiskEngine.mqh    |
//|                             Copyright 2026, Gueta Quant (AGPLv3) |
//|                                       https://guetaquant.com     |
//+------------------------------------------------------------------+
#property copyright "Gueta Quant"
#property link      "https://guetaquant.com"

class CGQRiskManager
{
private:
   string   m_symbol;
   double   m_risk_pct;

public:
   CGQRiskManager(string symbol, double risk_pct) : m_symbol(symbol), m_risk_pct(risk_pct) {}

   double CalculateLots(double sl_distance_price)
   {
      if (sl_distance_price <= 0) return 0.0;

      double balance     = AccountInfoDouble(ACCOUNT_BALANCE);
      double risk_amount = balance * (m_risk_pct / 100.0);

      double tick_size   = SymbolInfoDouble(m_symbol, SYMBOL_TRADE_TICK_SIZE);
      double tick_value  = SymbolInfoDouble(m_symbol, SYMBOL_TRADE_TICK_VALUE);
      double min_lot     = SymbolInfoDouble(m_symbol, SYMBOL_VOLUME_MIN);
      double max_lot     = SymbolInfoDouble(m_symbol, SYMBOL_VOLUME_MAX);
      double lot_step    = SymbolInfoDouble(m_symbol, SYMBOL_VOLUME_STEP);

      if (tick_size == 0 || tick_value == 0) return 0.0;

      double loss_per_lot = (sl_distance_price / tick_size) * tick_value;
      if (loss_per_lot <= 0) return 0.0;

      double raw_lots = risk_amount / loss_per_lot;

      // Normalize to broker lot step
      double normalized_lots = MathFloor(raw_lots / lot_step) * lot_step;

      if (normalized_lots < min_lot) normalized_lots = min_lot;
      if (normalized_lots > max_lot) normalized_lots = max_lot;

      return normalized_lots;
   }
};

double GetATRDistance(string symbol, ENUM_TIMEFRAMES tf, int period, double multiplier)
{
   int handle = iATR(symbol, tf, period);
   if (handle == INVALID_HANDLE) return 0.0;

   double atr_val[1];
   if (CopyBuffer(handle, 0, 0, 1, atr_val) <= 0) return 0.0;

   return atr_val[0] * multiplier;
}