from uuid import uuid4
from fastapi import Request
from app.config import config
from app.models.exception import HttpException

def get_task_id(request: Request):
    task_id = request.headers.get("x-task-id")
    if not task_id:
        task_id = uuid4()
    return str(task_id)

def get_api_key(request: Request):
    # Try multiple ways to get API key
    api_key = request.headers.get("x-api-key")
    if not api_key:
        api_key = request.headers.get("authorization")
        if api_key and api_key.startswith("Bearer "):
            api_key = api_key[7:]  # Remove "Bearer " prefix
    return api_key

def verify_token(request: Request):
    """验证API密钥（可选）"""
    # Check if API authentication is enabled
    api_enabled = config.app.get("api_enabled", True)
    configured_api_key = config.app.get("api_key", "")
    
    # If API is disabled or no API key is configured, skip authentication
    if not api_enabled or not configured_api_key:
        return True
    
    # Get API key from request
    provided_api_key = get_api_key(request)
    
    # Verify API key
    if not provided_api_key or provided_api_key != configured_api_key:
        request_id = get_task_id(request)
        # 使用通用错误消息，不暴露系统详细信息
        raise HttpException(
            task_id=request_id,
            status_code=401,
            message="Authentication failed. Please provide a valid API key via X-API-Key header or Authorization Bearer token.",
        )
    
    return True