from fastapi import FastAPI, HTTPException, BackgroundTasks
from fastapi.responses import JSONResponse
import asyncio
import random
import logging
from typing import List, Dict, Optional, Any
from playwright.async_api import async_playwright
import uvicorn
from pydantic import BaseModel

# Set up logging
logging.basicConfig(level=logging.INFO, 
                   format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
logger = logging.getLogger(__name__)

app = FastAPI(title="Kling Video Fetcher", 
             description="API to fetch random videos from Kling AI gallery")

# Model for the response
class VideoResponse(BaseModel):
    url: str
    thumbnail: Optional[str] = None
    title: Optional[str] = None
    status: str = "success"

# Cache to store recent video URLs
video_cache: List[Dict[str, Any]] = []
last_fetch_time = 0

async def fetch_random_video_from_kling() -> Dict[str, Any]:
    try:
        async with async_playwright() as p:
            browser = await p.chromium.launch(headless=True, args=[
                '--no-sandbox',
                '--disable-setuid-sandbox',
                '--disable-dev-shm-usage',
                '--disable-accelerated-2d-canvas',
                '--no-first-run',
                '--no-zygote',
                '--disable-gpu',
                '--disable-web-security',
            ])
            context = await browser.new_context(viewport={'width': 1280, 'height': 800})
            page = await context.new_page()

            video_urls = []

            # Intercept requests to capture video URLs
            async def on_response(response):
                try:
                    url = response.url
                    content_type = response.headers.get("content-type", "")
                    if ".mp4" in url or "video" in content_type:
                        video_urls.append(url)
                except Exception as e:
                    logger.error(f"Error processing response: {e}")

            page.on("response", on_response)

            await page.goto("https://app.klingai.com/global/community/material", timeout=90000, wait_until="networkidle")
            await page.wait_for_timeout(5000)

            for _ in range(6):
                await page.evaluate("window.scrollBy(0, 800)")
                await page.wait_for_timeout(1500)

            elements = await page.query_selector_all("video, [class*='video'], [class*='card'], [class*='media']")
            elements = [e for e in elements if await e.is_visible()]
            random.shuffle(elements)

            for element in elements[:5]:
                try:
                    await element.scroll_into_view_if_needed()
                    await page.wait_for_timeout(1000)
                    await element.click()
                    await page.wait_for_timeout(3000)

                    if video_urls:
                        video_url = video_urls[0]
                        title = await page.title()
                        return {
                            "url": video_url,
                            "thumbnail": None,
                            "title": title if title != "Kling AI" else None,
                            "status": "success"
                        }
                except Exception as e:
                    logger.warning(f"Element interaction failed: {e}")

            raise HTTPException(status_code=404, detail="Could not find a downloadable video")
    except Exception as e:
        logger.error(f"Unexpected error: {e}")
        raise HTTPException(status_code=500, detail=str(e))

@app.get("/api/random-video", response_model=VideoResponse)
async def get_random_video():
    """
    Endpoint to get a random video from Kling AI gallery.
    Returns the video URL and metadata.
    """
    try:
        # Fetch a random video
        video_info = await fetch_random_video_from_kling()
        
        # Return the video information
        return {
            "url": video_info["url"],
            "thumbnail": video_info.get("thumbnail"),
            "title": video_info.get("title"),
            "status": "success"
        }
    except HTTPException as e:
        # Re-raise HTTP exceptions
        raise e
    except Exception as e:
        # Log and convert other exceptions to HTTPException
        logger.error(f"Error in endpoint: {e}")
        raise HTTPException(status_code=500, detail=f"An error occurred: {str(e)}")

@app.get("/")
async def root():
    """Root endpoint with API information"""
    return {
        "name": "Kling Video Fetcher API",
        "version": "1.0",
        "endpoints": {
            "/api/random-video": "Get a random video URL from Kling AI gallery"
        }
    }

@app.get("/health")
async def health_check():
    """Health check endpoint"""
    return {"status": "healthy"}

# Run the server
if __name__ == "__main__":
    uvicorn.run("app:app", host="0.0.0.0", port=8000, reload=True)