#!/usr/bin/env python3
"""
Simple dashboard server for Quantitative Trading Platform.
Provides mock metrics for PnL, drawdown, and win rate.
"""

from flask import Flask, render_template, jsonify
import random
from datetime import datetime, timedelta

app = Flask(__name__)

def generate_mock_metrics():
    """Generate realistic mock trading metrics."""
    # Simulate daily PnL over last 30 days
    end_date = datetime.now()
    start_date = end_date - timedelta(days=30)
    
    daily_pnl = []
    current_pnl = 0
    for i in range(30):
        day_pnl = random.uniform(-500, 1500)
        current_pnl += day_pnl
        daily_pnl.append({
            'date': (start_date + timedelta(days=i)).strftime('%Y-%m-%d'),
            'pnl': round(day_pnl, 2),
            'cumulative': round(current_pnl, 2)
        })
    
    # Calculate derived metrics
    total_pnl = current_pnl
    peak = max([d['cumulative'] for d in daily_pnl])
    trough = min([d['cumulative'] for d in daily_pnl])
    max_drawdown = round(abs(trough - peak), 2) if peak > 0 else 0
    
    # Win rate (percentage of profitable days)
    profitable_days = sum(1 for d in daily_pnl if d['pnl'] > 0)
    win_rate = round(profitable_days / len(daily_pnl) * 100, 1)
    
    # Current portfolio value (simulated)
    portfolio_value = 100000 + total_pnl
    
    return {
        'total_pnl': round(total_pnl, 2),
        'daily_pnl': daily_pnl,
        'max_drawdown': max_drawdown,
        'win_rate': win_rate,
        'portfolio_value': round(portfolio_value, 2),
        'peak': round(peak, 2),
        'trough': round(trough, 2),
        'last_updated': end_date.isoformat()
    }

@app.route('/')
def dashboard():
    """Serve the dashboard HTML page."""
    return render_template('dashboard.html')

@app.route('/api/metrics')
def metrics():
    """API endpoint returning current metrics."""
    return jsonify(generate_mock_metrics())

@app.route('/health')
def health():
    """Health check endpoint."""
    return jsonify({'status': 'healthy', 'timestamp': datetime.now().isoformat()})

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000, debug=True)