from fastapi import FastAPI, HTTPException, Query
from pydantic import BaseModel
from playwright.async_api import async_playwright
import asyncio
import base64
import logging
from typing import List, Optional

# Set up logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

app = FastAPI(title="Playwright Web Scraper", description="A simple web scraper using Playwright")

class LinkInfo(BaseModel):
    text: str
    href: str

class ScrapeResponse(BaseModel):
    content: Optional[str] = None
    screenshot: Optional[str] = None
    links: Optional[List[LinkInfo]] = None

@app.get("/")
async def root():
    return {
        "message": "Playwright Web Scraper API",
        "endpoints": {
            "/scrape": "Scrape a webpage (GET request)",
            "/docs": "API documentation"
        },
        "example": "/scrape?url=https://example.com&screenshot=true&get_links=true&get_content=false"
    }

@app.get("/scrape")
async def scrape_page(
    url: str = Query(..., description="URL to scrape"),
    screenshot: bool = Query(True, description="Take a screenshot"),
    get_links: bool = Query(True, description="Extract links"),
    get_content: bool = Query(False, description="Get page content (can be large)")
):
    logger.info(f"Starting scrape for URL: {url}")
    try:
        async with async_playwright() as p:
            logger.info("Launching browser...")
            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'
                ]
            )
            page = await browser.new_page()

            try:
                logger.info(f"Navigating to {url}...")
                await page.goto(url, wait_until="networkidle")
                response = ScrapeResponse()

                # Get page content
                if get_content:
                    logger.info("Getting page content...")
                    response.content = await page.content()

                # Get screenshot
                if screenshot:
                    logger.info("Taking screenshot...")
                    screenshot_bytes = await page.screenshot()
                    response.screenshot = base64.b64encode(screenshot_bytes).decode('utf-8')

                # Get links
                if get_links:
                    logger.info("Extracting links...")
                    links = await page.evaluate("""
                        () => {
                            return Array.from(document.querySelectorAll('a')).map(a => {
                                return {
                                    text: a.innerText.trim(),
                                    href: a.href
                                }
                            });
                        }
                    """)
                    response.links = [LinkInfo(**link) for link in links]

                await browser.close()
                logger.info("Scraping completed successfully")
                return response

            except Exception as e:
                logger.error(f"Error during scraping: {str(e)}")
                await browser.close()
                raise HTTPException(status_code=500, detail=f"Scraping error: {str(e)}")

    except Exception as e:
        logger.error(f"Error launching browser: {str(e)}")
        raise HTTPException(status_code=500, detail=f"Browser launch error: {str(e)}")