"""
Cloudflare API Client
Handles authentication and base HTTP operations for Cloudflare services
"""

import asyncio
import json
from typing import Any, Dict, Optional, Union

import aiohttp

from app.logger import logger


class CloudflareClient:
    """Base client for Cloudflare API operations"""

    def __init__(
        self,
        api_token: str,
        account_id: str,
        worker_url: Optional[str] = None,
        timeout: int = 30,
    ):
        self.api_token = api_token
        self.account_id = account_id
        self.worker_url = worker_url
        self.timeout = timeout
        self.base_url = "https://api.cloudflare.com/client/v4"

        # HTTP headers for API requests
        self.headers = {
            "Authorization": f"Bearer {api_token}",
            "Content-Type": "application/json",
        }

    async def _make_request(
        self,
        method: str,
        url: str,
        data: Optional[Dict[str, Any]] = None,
        headers: Optional[Dict[str, str]] = None,
        use_worker: bool = False,
    ) -> Dict[str, Any]:
        """Make HTTP request to Cloudflare API or Worker"""

        # Use worker URL if specified and use_worker is True
        if use_worker and self.worker_url:
            full_url = f"{self.worker_url.rstrip('/')}/{url.lstrip('/')}"
        else:
            full_url = f"{self.base_url}/{url.lstrip('/')}"

        request_headers = self.headers.copy()
        if headers:
            request_headers.update(headers)

        timeout = aiohttp.ClientTimeout(total=self.timeout)

        try:
            async with aiohttp.ClientSession(timeout=timeout) as session:
                async with session.request(
                    method=method.upper(),
                    url=full_url,
                    headers=request_headers,
                    json=data if data else None,
                ) as response:
                    response_text = await response.text()

                    try:
                        response_data = (
                            json.loads(response_text) if response_text else {}
                        )
                    except json.JSONDecodeError:
                        response_data = {"raw_response": response_text}

                    if not response.ok:
                        logger.error(
                            f"Cloudflare API error: {response.status} - {response_text}"
                        )
                        raise CloudflareError(
                            f"HTTP {response.status}: {response_text}",
                            response.status,
                            response_data,
                        )

                    return response_data

        except asyncio.TimeoutError:
            logger.error(f"Timeout making request to {full_url}")
            raise CloudflareError(f"Request timeout after {self.timeout}s")
        except aiohttp.ClientError as e:
            logger.error(f"HTTP client error: {e}")
            raise CloudflareError(f"Client error: {e}")

    async def get(
        self,
        url: str,
        headers: Optional[Dict[str, str]] = None,
        use_worker: bool = False,
    ) -> Dict[str, Any]:
        """Make GET request"""
        return await self._make_request(
            "GET", url, headers=headers, use_worker=use_worker
        )

    async def post(
        self,
        url: str,
        data: Optional[Dict[str, Any]] = None,
        headers: Optional[Dict[str, str]] = None,
        use_worker: bool = False,
    ) -> Dict[str, Any]:
        """Make POST request"""
        return await self._make_request(
            "POST", url, data=data, headers=headers, use_worker=use_worker
        )

    async def put(
        self,
        url: str,
        data: Optional[Dict[str, Any]] = None,
        headers: Optional[Dict[str, str]] = None,
        use_worker: bool = False,
    ) -> Dict[str, Any]:
        """Make PUT request"""
        return await self._make_request(
            "PUT", url, data=data, headers=headers, use_worker=use_worker
        )

    async def delete(
        self,
        url: str,
        headers: Optional[Dict[str, str]] = None,
        use_worker: bool = False,
    ) -> Dict[str, Any]:
        """Make DELETE request"""
        return await self._make_request(
            "DELETE", url, headers=headers, use_worker=use_worker
        )

    async def upload_file(
        self,
        url: str,
        file_data: bytes,
        content_type: str = "application/octet-stream",
        headers: Optional[Dict[str, str]] = None,
        use_worker: bool = False,
    ) -> Dict[str, Any]:
        """Upload file data"""

        # Use worker URL if specified and use_worker is True
        if use_worker and self.worker_url:
            full_url = f"{self.worker_url.rstrip('/')}/{url.lstrip('/')}"
        else:
            full_url = f"{self.base_url}/{url.lstrip('/')}"

        upload_headers = {
            "Authorization": f"Bearer {self.api_token}",
            "Content-Type": content_type,
        }
        if headers:
            upload_headers.update(headers)

        timeout = aiohttp.ClientTimeout(
            total=self.timeout * 2
        )  # Longer timeout for uploads

        try:
            async with aiohttp.ClientSession(timeout=timeout) as session:
                async with session.put(
                    url=full_url, headers=upload_headers, data=file_data
                ) as response:
                    response_text = await response.text()

                    try:
                        response_data = (
                            json.loads(response_text) if response_text else {}
                        )
                    except json.JSONDecodeError:
                        response_data = {"raw_response": response_text}

                    if not response.ok:
                        logger.error(
                            f"File upload error: {response.status} - {response_text}"
                        )
                        raise CloudflareError(
                            f"Upload failed: HTTP {response.status}",
                            response.status,
                            response_data,
                        )

                    return response_data

        except asyncio.TimeoutError:
            logger.error(f"Timeout uploading file to {full_url}")
            raise CloudflareError(f"Upload timeout after {self.timeout * 2}s")
        except aiohttp.ClientError as e:
            logger.error(f"Upload client error: {e}")
            raise CloudflareError(f"Upload error: {e}")

    def get_account_url(self, endpoint: str) -> str:
        """Get URL for account-scoped endpoint"""
        return f"accounts/{self.account_id}/{endpoint}"

    def get_worker_url(self, endpoint: str) -> str:
        """Get URL for worker endpoint"""
        if not self.worker_url:
            raise CloudflareError("Worker URL not configured")
        return endpoint


class CloudflareError(Exception):
    """Cloudflare API error"""

    def __init__(
        self,
        message: str,
        status_code: Optional[int] = None,
        response_data: Optional[Dict[str, Any]] = None,
    ):
        super().__init__(message)
        self.status_code = status_code
        self.response_data = response_data or {}

    def __str__(self) -> str:
        if self.status_code:
            return f"CloudflareError({self.status_code}): {super().__str__()}"
        return f"CloudflareError: {super().__str__()}"