"""
Hugging Face Spaces 启动入口
"""

import os
import sys
import subprocess
import time
import signal
import atexit

def setup_environment():
    """设置必要的环境变量和目录"""
    # 确保数据目录存在
    try:
        os.makedirs("data", exist_ok=True)
        print("✅ 数据目录已创建")
    except Exception as e:
        print(f"⚠️ 创建数据目录失败: {str(e)}")
    
    # 打印环境诊断信息
    print("🔍 系统信息:")
    print(f"  - Python: {sys.version}")
    print(f"  - 工作目录: {os.getcwd()}")
    print(f"  - 用户: {os.getuid() if hasattr(os, 'getuid') else 'N/A'}")
    
    # 检查二进制文件
    for binary in ["subconverter/subconverter", "clash_core/clash.meta-linux-amd64"]:
        if os.path.exists(binary):
            try:
                # 文件信息
                print(f"✅ 发现二进制文件: {binary}")
                print(f"  - 大小: {os.path.getsize(binary)} 字节")
                print(f"  - 权限: {oct(os.stat(binary).st_mode)[-3:]}")
                print(f"  - 可执行: {os.access(binary, os.X_OK)}")
                
                # 尝试获取文件类型
                try:
                    file_type = subprocess.check_output(["file", binary], universal_newlines=True)
                    print(f"  - 类型: {file_type.strip()}")
                except Exception as e:
                    print(f"  - 获取文件类型失败: {str(e)}")
                
                # 设置执行权限
                os.chmod(binary, 0o755)
                print(f"✅ {binary}权限已设置")
            except Exception as e:
                print(f"⚠️ 检查{binary}时出错: {str(e)}")
        else:
            print(f"❌ 找不到二进制文件: {binary}")
    
    # 尝试执行 Clash 来获取版本信息
    clash_path = "clash_core/clash.meta-linux-amd64"
    if os.path.exists(clash_path):
        try:
            version_output = subprocess.check_output([clash_path, "-v"], stderr=subprocess.STDOUT, universal_newlines=True, timeout=2)
            print(f"✅ Clash版本信息: {version_output.strip()}")
        except Exception as e:
            print(f"⚠️ 获取Clash版本信息失败: {str(e)}")
    
    # 设置环境变量
    os.environ["FLASK_PORT"] = "7860"  # HF Spaces 要求的端口
    
    # 如果没有设置 SUB_URL 环境变量，尝试从 .env 加载
    if not os.environ.get("SUB_URL") and os.path.exists(".env"):
        try:
            with open(".env", "r") as f:
                for line in f:
                    line = line.strip()
                    if line and not line.startswith("#"):
                        key, value = line.split("=", 1)
                        os.environ[key] = value
            print("✅ 从.env加载了环境变量")
        except Exception as e:
            print(f"⚠️ 加载.env失败: {str(e)}")

def start_app():
    """启动应用程序"""
    print("🚀 正在启动 Simple Clash Relay...")
    
    # 使用 gunicorn 启动 Flask 应用
    app_process = subprocess.Popen(
        ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "2", "--threads", "4", "--timeout", "120", "app.main:app"],
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
        universal_newlines=True
    )
    
    # 注册应用程序退出时的清理函数
    def cleanup():
        print("🛑 正在停止应用...")
        app_process.terminate()
        try:
            app_process.wait(timeout=5)
        except subprocess.TimeoutExpired:
            app_process.kill()
    
    atexit.register(cleanup)
    
    # 信号处理
    def signal_handler(sig, frame):
        print(f"📢 接收到信号 {sig}，正在退出...")
        cleanup()
        sys.exit(0)
    
    signal.signal(signal.SIGINT, signal_handler)
    signal.signal(signal.SIGTERM, signal_handler)
    
    # 输出应用程序日志
    while True:
        output = app_process.stdout.readline()
        if output:
            print(output, end="")
        
        # 如果进程已经退出，退出循环
        if app_process.poll() is not None:
            break
    
    # 获取剩余输出
    remaining_output, _ = app_process.communicate()
    if remaining_output:
        print(remaining_output, end="")
    
    return app_process.returncode

if __name__ == "__main__":
    setup_environment()
    exit_code = start_app()
    sys.exit(exit_code)