import time
from typing import Optional, Dict, Any, Callable, Awaitable

from fastapi import Request, Response, Depends, HTTPException, security
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.dependencies import db_getter
from app.api.v1.module_system.auth.schema import AuthSchema
from app.plugin.module_payment.apikey.service import TenantApiKeyService
from app.plugin.module_payment.apikey.model import TenantApiKeyModel


class TenantApiKeyAuth:
    """
    租户API Key认证
    """
    def __init__(self, auto_error: bool = True):
        self.auto_error = auto_error

    async def __call__(self, request: Request, db: AsyncSession = Depends(db_getter)) -> Optional[TenantApiKeyModel]:
        """
        验证API Key
        """
        # 记录请求开始时间
        request.state.start_time = time.time()
        
        # 获取Authorization头
        authorization = request.headers.get("Authorization", None)
        
        if not authorization:
            if self.auto_error:
                raise HTTPException(status_code=401, detail="Authorization header required")
            return None
        
        # 检查是否为ApiKey认证
        if not authorization.startswith("ApiKey "):
            if self.auto_error:
                raise HTTPException(status_code=401, detail="Invalid authorization format")
            return None
        
        # 提取API Key和签名
        auth_str = authorization[7:]
        if ":" in auth_str:
            api_key, signature = auth_str.split(":", 1)
        else:
            api_key, signature = auth_str, None
        
        # 创建AuthSchema对象
        temp_auth = AuthSchema(
            user=None,
            check_data_scope=False,
            db=db,
            tenant_id=0
        )
        
        # 验证API Key
        api_key_obj = await TenantApiKeyService.validate_api_key(temp_auth, api_key)
        if not api_key_obj:
            # 记录失败日志
            await TenantApiKeyService.log_api_call(
                auth=temp_auth,
                api_key_id=None,
                tenant_id=0,
                endpoint=str(request.url.path),
                method=request.method,
                request_ip=request.client.host if request.client else "unknown",
                request_data=None,
                response_code=401,
                start_time=request.state.start_time,
            )
            if self.auto_error:
                raise HTTPException(status_code=401, detail="Invalid API Key")
            return None
        
        # 验证签名（如果提供）
        if signature:
            # 获取请求数据
            try:
                request_data = await request.json()
            except Exception:
                request_data = {}
            
            if not TenantApiKeyService.verify_signature(api_key_obj.api_secret, request_data, signature):
                # 记录失败日志
                await TenantApiKeyService.log_api_call(
                    auth=temp_auth,
                    api_key_id=api_key_obj.id,
                    tenant_id=api_key_obj.tenant_id,
                    endpoint=str(request.url.path),
                    method=request.method,
                    request_ip=request.client.host if request.client else "unknown",
                    request_data=request_data,
                    response_code=401,
                    start_time=request.state.start_time,
                )
                if self.auto_error:
                    raise HTTPException(status_code=401, detail="Invalid Signature")
                return None
        
        # 记录成功日志
        await TenantApiKeyService.log_api_call(
            auth=temp_auth,
            api_key_id=api_key_obj.id,
            tenant_id=api_key_obj.tenant_id,
            endpoint=str(request.url.path),
            method=request.method,
            request_ip=request.client.host if request.client else "unknown",
            request_data=None,  # 避免记录敏感数据
            response_code=200,
            start_time=request.state.start_time,
        )
        
        # 更新最后使用时间
        await TenantApiKeyService.update_last_used(temp_auth, api_key_obj.id)
        
        # 将API Key对象存储到请求状态
        request.state.api_key = api_key_obj
        request.state.tenant_id = api_key_obj.tenant_id
        
        return api_key_obj


async def get_tenant_from_api_key(
    request: Request,
    api_key: Optional[TenantApiKeyModel] = Depends(TenantApiKeyAuth(auto_error=False)),
) -> Optional[int]:
    """
    从API Key获取租户ID
    """
    if api_key:
        return api_key.tenant_id
    return None