#!/usr/bin/env python
# -*- coding: utf-8 -*-

import logging as log
import os
import sys
import time
import config
from dataclasses import dataclass
import yaml

PROJECT_ROOT = os.path.dirname(os.path.abspath(__file__))
GLOBAL_CONFIG_PATH = os.path.join(PROJECT_ROOT, "etc", "_global.yaml")
if PROJECT_ROOT not in sys.path:
    sys.path.insert(0, PROJECT_ROOT)

from sdk import Client
from strategy.trend.boot import StartTrend


@dataclass(frozen=True)
class StrategyDefinition:
    mutex_scope: str
    start_strategy: object


STRATEGIES = {
    "trend": StrategyDefinition("Trend", StartTrend),
}

def require_windows() -> bool:
    return os.name == "nt"

def check_single_instance(project_root: str) -> bool:
    """使用 Windows 命名互斥锁保证单实例。"""
    try:
        import ctypes

        error_already_exists = 183
        invalid_handle_value = -1
        safe_path = project_root.replace(":", "_").replace("\\", "_")
        mutex_name = f"Global\\QMT_System_{safe_path}"
        kernel32 = ctypes.WinDLL("kernel32", use_last_error=True)
        handle = kernel32.CreateMutexW(None, True, mutex_name)
        if not handle or handle == invalid_handle_value:
            log.error(f"无法创建互斥锁，错误代码：{ctypes.get_last_error()}")
            return False
        if ctypes.get_last_error() == error_already_exists:
            log.error("程序已在运行中，无法启动多个实例")
            kernel32.CloseHandle(handle)
            return False
        log.info(f"成功获取互斥锁：{mutex_name}")
        return True
    except Exception as exc:
        log.error(f"单实例检测失败：{exc}", exc_info=True)
        return False


def ping_api_host(
    rpc_host: str,
    retry_interval: float = 5.0,
    connect_timeout: float = 3.0,
) -> None:
    """循环检查 API 地址，连通后才返回。"""
    client = Client(config.global_config.qmt_base_url, config.global_config.qmt_token, config.HTTP_TIMEOUT)

    while True:
        try:
            assets = client.assets()
            log.info(f"API 服务已连通：{config.global_config.qmt_base_url}")
            return
        except:
            log.warning(
                f"API 服务未就绪：{config.global_config.qmt_base_url}，{retry_interval:g} 秒后重试"
            )
            time.sleep(retry_interval)
    
def wait_for_any_key() -> None:
    print("按任意键退出...", flush=True)
    if os.name == "nt":
        import msvcrt

        msvcrt.getch()
    elif sys.stdin.isatty():
        sys.stdin.read(1)


def main() -> int:
    try:
        if not require_windows():
            log.error("本程序仅支持 Windows 环境运行")
            return 1
        if not check_single_instance(PROJECT_ROOT):
            return 1

        config.load()
        if config.global_config is None or config.account_config is None:
            raise RuntimeError("配置尚未加载，请先调用 config.load()")
        
        ping_api_host(config.global_config.qmt_base_url)

        STRATEGIES[config.account_config.strategy].start_strategy()
        return 0
    except (OSError, yaml.YAMLError, ValueError) as exc:
            print(f"启动失败: {exc}", file=sys.stderr, flush=True)
            wait_for_any_key()
            return 1


if __name__ == "__main__":
    sys.exit(main())