from fastapi import FastAPI
from characterai import PyCAI as AnotherAPI
import requests
import re
import json
import logging

app = FastAPI()

class VideoLinkExtractor:
    """Class for extracting video links from HTML content."""

    def __init__(self, html_content):
        self.html_content = html_content

    def clean_str(self, s):
        """Cleans and returns a JSON-encoded string."""
        try:
            return json.loads(f'{{"text": "{s}"}}')['text']
        except json.JSONDecodeError as e:
            logging.error(f"Error decoding JSON: {e}")
            return None

    def get_link(self, regex):
        """Extracts and returns link based on the provided regex."""
        match = re.search(regex, self.html_content)
        return self.clean_str(match.group(1)) if match else None

    def get_title(self):
        """Extracts and returns the title from HTML content."""
        return self.get_link(r'<title>(.*?)<\/title>')

@app.get("/AnotherAPI/{api_key}/FB_Downloader")
async def API(api_key: str):
    API = (api_key)
    if API == "2005":
        return {"response": "Status: Activated"}

@app.get("/AnotherAPI/{api_key}/FB_Downloader/")
async def get_video_links(url: str, api_key: str):
    API = (api_key)
    if API == "2005":
        if not url:
            return {"success": False, "message": "Please provide the URL"}

        headers = {
            'sec-fetch-user': '?1',
            'sec-ch-ua-mobile': '?0',
            'sec-fetch-site': 'none',
            'sec-fetch-dest': 'document',
            'sec-fetch-mode': 'navigate',
            'cache-control': 'max-age=0',
            'authority': 'www.facebook.com',
            'upgrade-insecure-requests': '1',
            'accept-language': 'en-GB,en;q=0.9,tr-TR;q=0.8,tr;q=0.7,en-US;q=0.6',
            'sec-ch-ua': '"Google Chrome";v="89", "Chromium";v="89", ";Not A Brand";v="99"',
            'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36',
            'accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9'
        }

        try:
            r = requests.get(url, headers=headers)
            r.raise_for_status()
            extractor = VideoLinkExtractor(r.text)

            data = {
                "success": True,
                "title": extractor.get_title(),
                "links": {}
            }

            sd_link = extractor.get_link(r'browser_native_sd_url":"([^"]+)"')
            if sd_link:
                data["links"]["Download Low Quality"] = sd_link + "&dl=1"

            hd_link = extractor.get_link(r'browser_native_hd_url":"([^"]+)"')
            if hd_link:
                data["links"]["Download High Quality"] = hd_link + "&dl=1"

            return data

        except requests.RequestException as e:
            logging.error(f"Request failed: {e}")
            return {"success": False, "message": str(e)}

    else:
        return {"response": "API Lu Mana?"}