"""Performance analysis and reporting for backtest results."""
from typing import Any


def print_results(results: list, initial_cash: float = 1_000_000.0) -> dict[str, Any]:
    """Print and return key performance metrics from a backtrader run result."""
    if not results:
        print("No results to report.")
        return {}

    result = results[0]
    report = {}

    # Sharpe ratio
    sharpe = result.analyzers.sharpe.get_analysis()
    report["sharpe"] = sharpe.get("sharperatio", "N/A")

    # Drawdown
    dd = result.analyzers.drawdown.get_analysis()
    report["max_drawdown"] = dd.get("max", {}).get("drawdown", "N/A")
    report["max_drawdown_len"] = dd.get("max", {}).get("len", "N/A")

    # Returns
    rets = result.analyzers.returns.get_analysis()
    report["total_return"] = rets.get("rtot", "N/A")
    report["avg_return"] = rets.get("ravg", "N/A")

    # Trades
    trades = result.analyzers.trades.get_analysis()
    report["total_trades"] = trades.get("total", {}).get("total", 0)
    report["won_trades"] = trades.get("won", {}).get("total", 0)
    report["lost_trades"] = trades.get("lost", {}).get("total", 0)

    # Print
    print("=" * 50)
    print("BACKTEST RESULTS")
    print("=" * 50)
    print(f"Sharpe Ratio:        {report['sharpe']}")
    print(f"Total Return:        {report['total_return']:.4%}" if isinstance(report['total_return'], float) else f"Total Return:        {report['total_return']}")
    print(f"Max Drawdown:        {report['max_drawdown']:.2%}" if isinstance(report['max_drawdown'], float) else f"Max Drawdown:        {report['max_drawdown']}")
    print(f"Max DD Length:       {report['max_drawdown_len']}")
    print(f"Total Trades:        {report['total_trades']}")
    print(f"Won/Lost:            {report['won_trades']}/{report['lost_trades']}")
    print("=" * 50)

    return report