from __future__ import annotations

from typing import Union
from aiohttp import ClientResponse
from requests import Response as RequestsResponse

from ..errors import ResponseStatusError, RateLimitError, MissingAuthError
from . import Response, StreamResponse

class CloudflareError(ResponseStatusError):
    ...

def is_cloudflare(text: str) -> bool:
    if "Generated by cloudfront" in text or '<p id="cf-spinner-please-wait">' in text:
        return True
    elif "<title>Attention Required! | Cloudflare</title>" in text or 'id="cf-cloudflare-status"' in text:
        return True
    return '<div id="cf-please-wait">' in text or "<title>Just a moment...</title>" in text

def is_openai(text: str) -> bool:
    return "<p>Unable to load site</p>" in text or 'id="challenge-error-text"' in text

async def raise_for_status_async(response: Union[StreamResponse, ClientResponse], message: str = None):
    if response.ok:
        return
    is_html = False
    if message is None:
        content_type = response.headers.get("content-type", "")
        if content_type.startswith("application/json"):
            message = await response.json()
            message = message.get("error", message)
            if isinstance(message, dict):
                message = message.get("message", message)
        else:
            message = (await response.text()).strip()
            is_html = content_type.startswith("text/html") or message.startswith("<!DOCTYPE")
    if message is None or is_html:
        if response.status == 520:
            message = "Unknown error (Cloudflare)"
        elif response.status in (429, 402):
            message = "Rate limit"
    if response.status == 401:
        raise MissingAuthError(f"Response {response.status}: {message}")
    if response.status == 403 and is_cloudflare(message):
        raise CloudflareError(f"Response {response.status}: Cloudflare detected")
    elif response.status == 403 and is_openai(message):
        raise MissingAuthError(f"Response {response.status}: OpenAI Bot detected")
    elif response.status == 502:
        raise ResponseStatusError(f"Response {response.status}: Bad Gateway")
    elif response.status == 504:
        raise RateLimitError(f"Response {response.status}: Gateway Timeout ")
    else:
        raise ResponseStatusError(f"Response {response.status}: {'HTML content' if is_html else message}")

def raise_for_status(response: Union[Response, StreamResponse, ClientResponse, RequestsResponse], message: str = None):
    if hasattr(response, "status"):
        return raise_for_status_async(response, message)
    if response.ok:
        return
    is_html = False
    if message is None:
        is_html = response.headers.get("content-type", "").startswith("text/html") or response.text.startswith("<!DOCTYPE")
        message = response.text
    if message is None or is_html:
        if response.status_code == 520:
            message = "Unknown error (Cloudflare)"
        elif response.status_code in (429, 402):
            raise RateLimitError(f"Response {response.status_code}: Rate Limit")
    if response.status_code == 401:
        raise MissingAuthError(f"Response {response.status_code}: {message}")
    if response.status_code == 403 and is_cloudflare(response.text):
        raise CloudflareError(f"Response {response.status_code}: Cloudflare detected")
    elif response.status_code == 403 and is_openai(response.text):
        raise MissingAuthError(f"Response {response.status_code}: OpenAI Bot detected")
    elif response.status_code == 502:
        raise ResponseStatusError(f"Response {response.status_code}: Bad Gateway")
    elif response.status_code == 504:
        raise RateLimitError(f"Response {response.status_code}: Gateway Timeout ")
    else:
        raise ResponseStatusError(f"Response {response.status_code}: {'HTML content' if is_html else message}")