#!/usr/bin/env python3
import argparse
import sys

import tabulate

import backtest_core


def parse_arguments():
    parser = argparse.ArgumentParser(description="量化回测工具", formatter_class=argparse.RawDescriptionHelpFormatter)

    parser.add_argument("--codes", type=str, nargs="+", required=True, help="股票代码列表 (如: 000001.SZ 600000.SH)", )
    parser.add_argument("--start-date", type=str, required=True, help="回测开始日期 (格式: YYYY-MM-DD)", )
    parser.add_argument("--end-date", type=str, required=True, help="回测结束日期 (格式: YYYY-MM-DD)", )
    parser.add_argument("--strategy-file", type=str, required=True, help="策略文件路径 (如: strategy.py)", )
    parser.add_argument("--cash", type=float, default=100000, help="初始资金 (默认: 100000)", )
    parser.add_argument("--commission", type=float, default=0.002, help="手续费率 (默认: 0.002)", )
    parser.add_argument("--warmup-days", type=int, default=365, help="预热天数 (默认: 365，约一年)", )
    parser.add_argument("--output-dir", type=str, default=None, help="HTML 图表输出目录 (可选，为每个股票生成 {code}.html)", )

    return parser.parse_args()


def format_single_result(result: backtest_core.BacktestResult):
    print("=" * 60)
    print(f"股票代码: {result.code}")
    print("=" * 60)

    indicator_mapping = {
        "最终收益": f"{result.equity_final:.2f}",
        "峰值收益": f"{result.equity_peak:.2f}",
        "总收益率（%）": f"{result.return_pct:.2f}",
        "买入并持有收益率（%）": f"{result.buy_hold_return_pct:.2f}",
        "年化收益率（%）": f"{result.return_ann_pct:.2f}",
        "年化波动率（%）": f"{result.volatility_ann_pct:.2f}",
        "索提诺比率": f"{result.sortino_ratio:.2f}",
        "卡尔玛比率": f"{result.calmar_ratio:.2f}",
        "最大回撤（%）": f"{result.max_drawdown_pct:.2f}",
        "平均回撤（%）": f"{result.avg_drawdown_pct:.2f}",
        "最大回撤持续时长": f"{result.max_drawdown_duration:.0f} 天",
        "平均回撤持续时长": f"{result.avg_drawdown_duration:.0f} 天",
        "总交易次数": f"{result.num_trades:.0f}",
        "胜率（%）": f"{result.win_rate_pct:.2f}",
        "系统质量数": f"{result.sqn:.2f}",
    }

    for name, value in indicator_mapping.items():
        print(f"{name}: {value}")

    print("=" * 60)


def format_batch_results(results: list[backtest_core.BacktestResult]):
    table_data = []
    for result in results:
        table_data.append(
            [
                result.code,
                f"{result.return_pct:.2f}",
                f"{result.buy_hold_return_pct:.2f}",
                f"{result.return_ann_pct:.2f}",
                f"{result.volatility_ann_pct:.2f}",
                f"{result.win_rate_pct:.2f}",
                f"{result.max_drawdown_pct:.2f}",
                f"{result.sortino_ratio:.2f}",
                f"{result.num_trades:.0f}",
                f"{result.sqn:.2f}",
            ]
        )

    headers = [
        "股票代码",
        "收益率%",
        "买入持有%",
        "年化收益%",
        "年化波动%",
        "胜率%",
        "最大回撤%",
        "索提诺比率",
        "交易次数",
        "SQN",
    ]
    print(tabulate.tabulate(table_data, headers=headers, tablefmt="grid"))


def main():
    args = parse_arguments()

    try:
        results = backtest_core.run_batch_backtest(
            codes=args.codes,
            start_date=args.start_date,
            end_date=args.end_date,
            strategy_file=args.strategy_file,
            cash=args.cash,
            commission=args.commission,
            warmup_days=args.warmup_days,
            output_dir=args.output_dir,
            show_progress=True,
        )

        if len(results) == 1:
            format_single_result(results[0])
        else:
            format_batch_results(results)

        if args.output_dir:
            print(f"\n图表已保存到: {args.output_dir}/")

    except Exception as e:
        print(f"\n错误: {e}")
        import traceback

        traceback.print_exc()
        sys.exit(1)


if __name__ == "__main__":
    main()