import sys
import signal
from pathlib import Path
import importlib.util
import logging  # 新增：日志模块

# ==================== 动态路径配置 ====================
from core.path_utils import add_project_root_to_path

# 添加项目根路径到sys.path
PROJECT_ROOT = add_project_root_to_path()
print(f"[INFO] 项目根路径: {PROJECT_ROOT}")
print(f"[INFO] Python路径: {sys.path[:3]}")


# ====================================================

def load_strategy_class(class_path: str):
    """动态加载策略类"""
    try:
        module_path, class_name = class_path.rsplit('.', 1)
        module = importlib.import_module(module_path)
        return getattr(module, class_name)
    except Exception as e:
        print(f"[ERROR] 加载策略类失败 {class_path}: {e}")
        print(f"[ERROR] 请检查项目根路径是否正确: {PROJECT_ROOT}")
        print(f"[ERROR] 当前sys.path: {sys.path}")
        sys.exit(1)


def setup_strategy_logger(config_file: Path, strategy_name: str, symbol: str) -> logging.Logger:
    """配置策略专属日志"""
    # 创建日志目录: logs/{策略名}/
    log_dir = Path("logs") / strategy_name
    log_dir.mkdir(exist_ok=True, parents=True)

    # 日志文件: logs/{策略名}/{品种}.log
    log_file = log_dir / f"{symbol}.log"

    # 配置logger
    logger = logging.getLogger(f"Strategy.{strategy_name}.{symbol}")
    logger.setLevel(logging.INFO)

    # 清除旧handler（防止重复）
    for h in logger.handlers[:]:
        logger.removeHandler(h)

    # 文件handler
    file_handler = logging.FileHandler(log_file, encoding='utf-8')
    file_handler.setFormatter(
        logging.Formatter('%(asctime)s [%(levelname)s] %(message)s')
    )
    logger.addHandler(file_handler)

    return logger, log_file


def run_strategy(config_path: str):
    """通过配置文件运行策略"""
    config_file = Path(config_path)
    if not config_file.exists():
        print(f"[ERROR] 配置文件不存在: {config_file}")
        sys.exit(1)

    # 动态加载配置模块
    try:
        spec = importlib.util.spec_from_file_location(
            f"strategy_config_{config_file.stem}", config_file
        )
        config_module = importlib.util.module_from_spec(spec)
        spec.loader.exec_module(config_module)

        if not hasattr(config_module, 'CONFIG'):
            print(f"[ERROR] 配置文件缺少 CONFIG 变量: {config_file}")
            sys.exit(1)

        config = config_module.CONFIG
    except Exception as e:
        print(f"[ERROR] 加载配置文件失败 {config_path}: {e}")
        sys.exit(1)

    # 配置策略专属日志（关键修改点）
    strategy_name = config_file.parent.name
    symbol = config_file.stem
    logger, log_file = setup_strategy_logger(config_file, strategy_name, symbol)

    # 重定向print到logger（捕获策略内的print调用）
    class PrintToLogger:
        def __init__(self, logger, level=logging.INFO):
            self.logger = logger
            self.level = level
            self.linebuf = ''

        def write(self, buf):
            for line in buf.rstrip().splitlines():
                self.logger.log(self.level, line.rstrip())

        def flush(self):
            pass

    # 重定向stdout和stderr
    sys.stdout = PrintToLogger(logger, logging.INFO)
    sys.stderr = PrintToLogger(logger, logging.ERROR)

    # 所有后续的print都会写入日志文件
    print(f"[INFO] [{config['name']}] 正在启动...")
    print(f"[INFO] 日志文件: {log_file}")

    # 动态加载策略类
    strategy_class = load_strategy_class(config["strategy_class"])

    # 创建API
    from tqsdk import TqApi, TqAuth, TqKq, TqAccount
    api = TqApi(TqAccount('H宏源期货', '903308830', 'lzr520102'), auth=TqAuth("emanresu", "dfgvfgdfgg"))

    # 准备策略参数
    strategy_params = config["strategy_params"].copy()
    strategy_params["main_symbol"] = config["engine_params"]["symbol"].split(".")[-1]

    # 创建引擎
    from src.tqsdk_real_engine import TqsdkEngine

    engine = TqsdkEngine(
        strategy_class=strategy_class,
        strategy_params=strategy_params,
        api=api,
        symbol=config["engine_params"]["symbol"],
        duration_seconds=config["engine_params"]["duration_seconds"],
        roll_over_mode=config["engine_params"]["roll_over_mode"],
        history_length=config["engine_params"]["history_length"],
        close_bar_delta=config["engine_params"]["close_bar_delta"]
    )

    # 信号处理
    def signal_handler(sig, frame):
        print(f"\n[INFO] [{config['name']}] 收到停止信号 {sig}，正在关闭...")
        # api.close()
        sys.exit(0)

    signal.signal(signal.SIGTERM, signal_handler)
    signal.signal(signal.SIGINT, signal_handler)

    # 运行
    try:
        print(f"[INFO] [{config['name']}] 开始运行")
        engine.run()
    except Exception as e:
        print(f"[ERROR] [{config['name']}] 运行出错: {e}", exc_info=True)
        sys.exit(1)
    finally:
        api.close()
        print(f"[INFO] [{config['name']}] 已停止")


if __name__ == "__main__":
    if len(sys.argv) != 3 or sys.argv[1] != "--config":
        print("使用方法: python launcher.py --config <config_file>")
        sys.exit(1)

    run_strategy(sys.argv[2])