// MQ4 Converter
class MQ4Converter {
    constructor(strategy) {
        this.strategy = strategy;
        this.parser = new RuleParser();
    }

    generate() {
        const { parameters, buy_rules, sell_rules } = this.strategy;
        const symbol = parameters.symbol || 'EURUSD';
        const atrPeriod = parameters.atr_period || 14;
        const slMultiplier = parameters.sl_multiplier || 2.0;
        const tpMultiplier = parameters.tp_multiplier || 3.0;

        // Generate random 6-digit magic number
        const magicNumber = Math.floor(100000 + Math.random() * 900000);

        const buyConditions = this.parser.parseRules(buy_rules, 'mql');
        // SELL rules use inverted operators
        const sellConditions = this.parser.parseRulesInverted(buy_rules, 'mql');

        return `//+------------------------------------------------------------------+
//|                                           Strategy_${symbol}.mq4 |
//|                                  Generated by Strategy Converter |
//+------------------------------------------------------------------+
#property copyright "FxMath Quant"
#property link      "https://fxmath.com"
#property version   "1.00"
#property strict

//=== TRADE SETTINGS ===
input double LotSize = 0.1;                    // Lot Size
input int ATR_Period = ${atrPeriod};           // ATR Period
input double SL_Multiplier = ${slMultiplier.toFixed(2)};  // SL ATR Multiplier
input double TP_Multiplier = ${tpMultiplier.toFixed(2)};  // TP ATR Multiplier
input int MagicNumber = ${magicNumber};        // Magic Number
input string TradeComment = "FxMath EA";       // Trade Comment
input int Slippage = 3;                        // Slippage

//=== SL/TP SETTINGS ===
input bool EnableHardSL = true;                // Enable Hard Stop Loss
input bool EnableHardTP = true;                // Enable Hard Take Profit

//=== TRAILING STOP ===
input bool EnableTrailing = false;             // Enable Trailing Stop
input double TrailingStart = 30;               // Trailing Start (pips)
input double TrailingStep = 10;                // Trailing Step (pips)

//=== BREAKEVEN ===
input bool EnableBreakeven = false;            // Enable Breakeven
input double BreakevenStart = 20;              // Breakeven Start (pips)
input double BreakevenOffset = 2;              // Breakeven Offset (pips)

//=== TIME FILTER ===
input bool EnableTimeFilter = false;           // Enable Time Filter
input int StartHour = 8;                       // Start Hour (Server Time)
input int StartMinute = 0;                     // Start Minute
input int EndHour = 22;                        // End Hour (Server Time)
input int EndMinute = 0;                       // End Minute

//=== SIGNAL SETTINGS ===
input bool CloseOnOpposite = false;             // Close Trade on Opposite Signal

//=== DISPLAY SETTINGS ===
input bool ShowChartInfo = true;               // Show Info on Chart

// Global Variables
double atrValue;

//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
{
    Print("Strategy EA initialized for ${symbol}");
    Print("Magic Number: ", MagicNumber);
    return(INIT_SUCCEEDED);
}

//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
{
    Print("Strategy EA deinitialized");
}

//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
{
    // Calculate ATR
    atrValue = iATR(Symbol(), 0, ATR_Period, 1);
    
    // Check for open positions
    bool hasPosition = false;
    for(int i = OrdersTotal() - 1; i >= 0; i--)
    {
        if(OrderSelect(i, SELECT_BY_POS, MODE_TRADES))
        {
            if(OrderSymbol() == Symbol() && OrderMagicNumber() == MagicNumber)
            {
                hasPosition = true;
                ManagePosition();
                break;
            }
        }
    }
    
    // If no position, check for entry signals
    if(!hasPosition)
    {
        // Check time filter
        if(EnableTimeFilter && !IsTimeAllowed())
            return;
        
        // Check Buy Signal
        if(CheckBuySignal())
        {
            OpenBuyOrder();
        }
        // Check Sell Signal
        else if(CheckSellSignal())
        {
            OpenSellOrder();
        }
    }
    
    // Display chart info
    if(ShowChartInfo)
        DisplayChartInfo();
}

//+------------------------------------------------------------------+
//| Check if current time is allowed for trading                    |
//+------------------------------------------------------------------+
bool IsTimeAllowed()
{
    int currentHour = Hour();
    int currentMinute = Minute();
    int currentMinutes = currentHour * 60 + currentMinute;
    int startMinutes = StartHour * 60 + StartMinute;
    int endMinutes = EndHour * 60 + EndMinute;
    
    if(startMinutes < endMinutes)
        return (currentMinutes >= startMinutes && currentMinutes < endMinutes);
    else
        return (currentMinutes >= startMinutes || currentMinutes < endMinutes);
}

//+------------------------------------------------------------------+
//| Manage existing position                                         |
//+------------------------------------------------------------------+
void ManagePosition()
{
    if(!OrderSelect(0, SELECT_BY_POS, MODE_TRADES))
        return;
    
    int orderType = OrderType();
    double orderOpenPrice = OrderOpenPrice();
    double orderSL = OrderStopLoss();
    double orderTP = OrderTakeProfit();
    
    // Check for opposite signal
    if(CloseOnOpposite)
    {
        if(orderType == OP_BUY && CheckSellSignal())
        {
            if(!OrderClose(OrderTicket(), OrderLots(), Bid, Slippage, clrRed))
                Print("Error closing buy order: ", GetLastError());
            return;
        }
        else if(orderType == OP_SELL && CheckBuySignal())
        {
            if(!OrderClose(OrderTicket(), OrderLots(), Ask, Slippage, clrGreen))
                Print("Error closing sell order: ", GetLastError());
            return;
        }
    }
    
    double currentPrice = (orderType == OP_BUY) ? Bid : Ask;
    double point = Point;
    double pipValue = point * 10;
    
    // Breakeven
    if(EnableBreakeven)
    {
        double profit = (orderType == OP_BUY) ? 
                       (currentPrice - orderOpenPrice) : 
                       (orderOpenPrice - currentPrice);
        
        if(profit >= BreakevenStart * pipValue)
        {
            double newSL = orderOpenPrice + (BreakevenOffset * pipValue * 
                          ((orderType == OP_BUY) ? 1 : -1));
            
            if((orderType == OP_BUY && newSL > orderSL) ||
               (orderType == OP_SELL && (orderSL == 0 || newSL < orderSL)))
            {
                if(!OrderModify(OrderTicket(), orderOpenPrice, newSL, orderTP, 0, clrBlue))
                    Print("Error modifying order for breakeven: ", GetLastError());
            }
        }
    }
    
    // Trailing Stop
    if(EnableTrailing)
    {
        double profit = (orderType == OP_BUY) ? 
                       (currentPrice - orderOpenPrice) : 
                       (orderOpenPrice - currentPrice);
        
        if(profit >= TrailingStart * pipValue)
        {
            double newSL = currentPrice - (TrailingStep * pipValue * 
                          ((orderType == OP_BUY) ? 1 : -1));
            
            if((orderType == OP_BUY && newSL > orderSL) ||
               (orderType == OP_SELL && (orderSL == 0 || newSL < orderSL)))
            {
                if(!OrderModify(OrderTicket(), orderOpenPrice, newSL, orderTP, 0, clrBlue))
                    Print("Error modifying order for trailing stop: ", GetLastError());
            }
        }
    }
}

//+------------------------------------------------------------------+
//| Display chart information                                        |
//+------------------------------------------------------------------+
void DisplayChartInfo()
{
    string info = "\\n=== " + TradeComment + " ===\\n";
    info += "Symbol: " + Symbol() + "\\n";
    info += "Magic: " + IntegerToString(MagicNumber) + "\\n";
    
    bool hasPosition = false;
    for(int i = OrdersTotal() - 1; i >= 0; i--)
    {
        if(OrderSelect(i, SELECT_BY_POS, MODE_TRADES))
        {
            if(OrderSymbol() == Symbol() && OrderMagicNumber() == MagicNumber)
            {
                hasPosition = true;
                info += "Position: " + (OrderType() == OP_BUY ? "BUY" : "SELL") + "\\n";
                info += "Profit: " + DoubleToStr(OrderProfit(), 2) + "\\n";
                break;
            }
        }
    }
    
    if(!hasPosition)
        info += "No Position\\n";
    
    Comment(info);
}

//+------------------------------------------------------------------+
//| Check Buy Signal                                                 |
//+------------------------------------------------------------------+
bool CheckBuySignal()
{
    return (${buyConditions.join(' &&\n            ')});
}

//+------------------------------------------------------------------+
//| Check Sell Signal                                                |
//+------------------------------------------------------------------+
bool CheckSellSignal()
{
    return (${sellConditions.join(' &&\n            ')});
}

//+------------------------------------------------------------------+
//| Open Buy Order                                                   |
//+------------------------------------------------------------------+
void OpenBuyOrder()
{
    double price = Ask;
    double sl = EnableHardSL ? price - (atrValue * SL_Multiplier) : 0;
    double tp = EnableHardTP ? price + (atrValue * TP_Multiplier) : 0;
    
    sl = (sl > 0) ? NormalizeDouble(sl, Digits) : 0;
    tp = (tp > 0) ? NormalizeDouble(tp, Digits) : 0;
    
    int ticket = OrderSend(Symbol(), OP_BUY, LotSize, price, Slippage, sl, tp, 
                          TradeComment, MagicNumber, 0, clrGreen);
    
    if(ticket > 0)
    {
        Print("Buy order opened at ", price, " SL: ", sl, " TP: ", tp);
    }
    else
    {
        Print("Error opening buy order: ", GetLastError());
    }
}

//+------------------------------------------------------------------+
//| Open Sell Order                                                  |
//+------------------------------------------------------------------+
void OpenSellOrder()
{
    double price = Bid;
    double sl = EnableHardSL ? price + (atrValue * SL_Multiplier) : 0;
    double tp = EnableHardTP ? price - (atrValue * TP_Multiplier) : 0;
    
    sl = (sl > 0) ? NormalizeDouble(sl, Digits) : 0;
    tp = (tp > 0) ? NormalizeDouble(tp, Digits) : 0;
    
    int ticket = OrderSend(Symbol(), OP_SELL, LotSize, price, Slippage, sl, tp, 
                          TradeComment, MagicNumber, 0, clrRed);
    
    if(ticket > 0)
    {
        Print("Sell order opened at ", price, " SL: ", sl, " TP: ", tp);
    }
    else
    {
        Print("Error opening sell order: ", GetLastError());
    }
}
//+------------------------------------------------------------------+
`;
    }
}

window.MQ4Converter = MQ4Converter;