"""Entry point for the ICT Smart Money Concepts Trading Bot.

Usage:
    python main.py              # Start live/sandbox trading
    python main.py --paper      # Paper trading mode (no API keys needed)
    python main.py --backtest   # Run backtest
    python main.py --dashboard  # Launch Streamlit dashboard only
"""

from __future__ import annotations

import argparse
import asyncio
import os
import subprocess
import sys
import threading
from pathlib import Path

# Suppress SMC startup message (avoids encoding issues on non-UTF8 terminals)
os.environ.setdefault("SMC_CREDIT", "0")
os.environ.setdefault("PYTHONIOENCODING", "utf-8")

from loguru import logger

# Ensure project root on path
sys.path.insert(0, str(Path(__file__).resolve().parent))


def setup_logging():
    """Configure loguru logging."""
    from config import settings

    logger.remove()
    logger.add(sys.stderr, level=settings.LOG_LEVEL)

    log_path = Path(settings.LOG_FILE)
    log_path.parent.mkdir(parents=True, exist_ok=True)
    logger.add(
        str(log_path),
        rotation="10 MB",
        retention="30 days",
        level=settings.LOG_LEVEL,
    )


def ensure_dirs():
    """Create required directories."""
    Path("data").mkdir(exist_ok=True)
    Path("logs").mkdir(exist_ok=True)


async def run_bot(paper_mode: bool = False):
    """Start the trading bot."""
    from core.bot import ICTBot

    bot = ICTBot(paper_mode=paper_mode)
    await bot.start()


async def run_backtest():
    """Run a backtest using historical data."""
    from backtest.backtester import Backtester
    from backtest.data_loader import DataLoader
    from execution.paper_exchange import PaperExchangeClient

    logger.info("Starting backtest...")

    client = PaperExchangeClient()
    await client.connect()
    loader = DataLoader(client)
    data = await loader.fetch_from_exchange(
        symbol="BTC/USDT",
        timeframe="1h",
        since="2025-01-01",
        limit=2000,
    )
    await client.disconnect()

    if data.empty:
        logger.error("No data loaded for backtest")
        return

    bt = Backtester()
    result = bt.run(data, initial_balance=1000.0)
    print(Backtester.generate_report(result))


def run_dashboard():
    """Launch the Streamlit dashboard."""
    dashboard_path = Path(__file__).parent / "dashboard" / "app.py"
    subprocess.run([sys.executable, "-m", "streamlit", "run", str(dashboard_path),
                    "--server.port", "8501", "--server.headless", "true"])


def launch_dashboard_background():
    """Launch dashboard in a background thread."""
    t = threading.Thread(target=run_dashboard, daemon=True)
    t.start()
    logger.info("Dashboard launched at http://localhost:8501")
    return t


def main():
    parser = argparse.ArgumentParser(
        description="ICT Smart Money Concepts Crypto Trading Bot"
    )
    parser.add_argument(
        "--backtest", action="store_true", help="Run backtest mode"
    )
    parser.add_argument(
        "--dashboard", action="store_true", help="Launch Streamlit dashboard only"
    )
    parser.add_argument(
        "--paper", action="store_true", help="Paper trading mode (no API keys needed)"
    )
    parser.add_argument(
        "--no-dashboard", action="store_true", help="Disable auto-launching dashboard"
    )
    args = parser.parse_args()

    setup_logging()
    ensure_dirs()

    if args.paper:
        os.environ["SANDBOX_MODE"] = "true"

    if args.backtest:
        asyncio.run(run_backtest())
    elif args.dashboard:
        run_dashboard()
    else:
        # Launch dashboard alongside the bot unless disabled
        if not args.no_dashboard:
            launch_dashboard_background()

        asyncio.run(run_bot(paper_mode=args.paper))


if __name__ == "__main__":
    main()