import asyncio
import time
from datetime import datetime
from playwright.async_api import async_playwright
import sqlite3

class SERPScraper:
    def __init__(self, proxy_config):
        self.proxy = proxy_config
        self.request_log = []
        self.failed_queries = []

    async def setup_browser(self, playwright):
        """Initialize browser with realistic fingerprinting"""
        browser = await playwright.chromium.launch(
            proxy=self.proxy,
            headless=True,
            args=[\
                '--disable-blink-features=AutomationControlled',\
            ]
        )

        # Set viewport and user agent to match real browser
        context = await browser.new_context(
            viewport={'width': 1920, 'height': 1080},
            user_agent='Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
        )

        # Inject script to mask automation
        await context.add_init_script("""
            Object.defineProperty(navigator, 'webdriver', {
                get: () => undefined,
            });
            Object.defineProperty(navigator, 'plugins', {
                get: () => [1, 2, 3],
            });
        """)

        return browser, context

    async def search(self, query, page_num=1):
        """Execute search query with anti-detection measures"""
        async with async_playwright() as playwright:
            browser, context = await self.setup_browser(playwright)
            page = await context.new_page()

            # Random delay before search
            await asyncio.sleep(__import__('random').uniform(2, 5))

            url = f"https://www.google.com/search?q={query}&start={page_num * 10}"

            try:
                # Wait for network to settle
                await page.goto(url, wait_until='networkidle')

                # Scroll to trigger lazy loading
                await page.evaluate('window.scrollTo(0, document.body.scrollHeight)')
                await asyncio.sleep(1)

                # Extract results
                results = await page.evaluate("""
                    () => {
                        return Array.from(document.querySelectorAll('div[data-sokoban-container]')).map(el => ({
                            title: el.querySelector('h3')?.textContent,
                            url: el.querySelector('a')?.href,
                            description: el.querySelector('[data-snf=d3_rs]')?.textContent,
                        }));
                    }
                """)

                self.request_log.append({
                    'timestamp': datetime.now().isoformat(),
                    'query': query,
                    'success': True,
                    'result_count': len(results)
                })

                return results

            except Exception as e:
                self.failed_queries.append({
                    'query': query,
                    'error': str(e),
                    'timestamp': datetime.now().isoformat()
                })
                return []

            finally:
                await context.close()
                await browser.close()

async def main():
    # Configuration for residential proxy
    proxy_config = {
        'server': 'http://proxy.iploop.io:8880',
        'username': 'your_username',
        'password': 'your_password',
    }

    scraper = SERPScraper(proxy_config)

    queries = ['best residential proxies', 'SERP scraping tools', 'web scraping python']

    for query in queries:
        results = await scraper.search(query)
        print(f"Query: {query}")
        print(f"Results: {len(results)}")

        # Mandatory delay between queries
        await asyncio.sleep(__import__('random').uniform(30, 60))

if __name__ == '__main__':
    asyncio.run(main())

async def check_for_captcha(page):
    """Detect if Google is serving CAPTCHA"""
    captcha_indicators = [\
        'g-recaptcha',\
        'unusual traffic from your computer network',\
        'Please try again in a few moments'\
    ]

    page_content = await page.content()
    return any(indicator in page_content for indicator in captcha_indicators)

async def search_with_backoff(scraper, query, max_retries=3):
    """Execute search with exponential backoff"""
    for attempt in range(max_retries):
        try:
            results = await scraper.search(query)
            if results:
                return results
        except Exception as e:
            if 'block' in str(e).lower() or 'captcha' in str(e).lower():
                # Exponential backoff: wait 2^attempt minutes
                wait_time = (2 ** attempt) * 60
                print(f"Detected blocking. Waiting {wait_time} seconds before retry...")
                await asyncio.sleep(wait_time)
                continue
            raise

    return []

async def scrape_with_proxy_rotation(queries, proxy_list):
    """Distribute queries across multiple residential proxies"""
    tasks = []

    for i, query in enumerate(queries):
        proxy = proxy_list[i % len(proxy_list)]  # Round-robin rotation

        scraper = SERPScraper({'server': proxy})
        task = scraper.search(query)
        tasks.append(task)

        # Stagger query execution
        await asyncio.sleep(__import__('random').uniform(5, 15))

    results = await asyncio.gather(*tasks)
    return results