"""Harvester: Proxy collection tool
Inspired by https://github.com/acidvegas/proxytools
"""
import concurrent.futures
import logging
from harvester.proxy import fetch_all, validate_socks


def load_urls(path):
    with open(path, 'r', encoding='utf-8') as file:
        urls = [line.strip() for line in file.readlines()]

    return urls


def main():
    """Main entry point."""
    logging.basicConfig(level=logging.WARN)

    # Load proxy source list and fetch proxies
    urls = load_urls('data/proxy-sources.txt')
    proxies = fetch_all(urls)
    print(f'Fetched {len(proxies)} proxies!')

    # Concurrently validate proxies with ThreadPoolExecutor
    valid = []
    with concurrent.futures.ThreadPoolExecutor(max_workers=128) as executor:
        validate_futures = {executor.submit(validate_socks, proxy): proxy for proxy in proxies}
        for future in concurrent.futures.as_completed(validate_futures):
            proxy = validate_futures[future]

            try:
                response = future.result()
                response.raise_for_status()
            except Exception as exception:
                # TODO: Handle exceptions differently. See issues.
                logging.info(str(exception))
                continue

            ip = response.text.strip()
            valid.append(proxy)
            print(f'{proxy} -> {ip}')

    with open('data/valid-socks.txt', 'w', encoding='utf-8') as file:
        file.write('\n'.join(valid))

    for proxy in valid:
        print(proxy)


if __name__ == '__main__':
    main()