import argparse
from urllib.parse import urlparse

from . import scrapers, outputters

def main ():
    parser = argparse.ArgumentParser(description="Forum scraper")
    parser.add_argument("--scraper", dest="scraper", help="Scraper to use; if not specified, tries to guess")
    parser.add_argument("--url", dest="url", required=True, help="URL to scrape")
    parser.add_argument("--out", dest="out", help="Path to output; if not specified, is the target forum's url")
    parser.add_argument("--outformat", dest="outformat", help="Format to output data out; if not specified, default (JSON-based) format is used")
    args = parser.parse_args()

    url = args.url
    if not (url.startswith("https://") or url.startswith("http://")):
        url = "http://{}".format(url)

    print("Target URL is: {}".format(url))
    if args.scraper:
        scraper = scrapers.get_scraper(args.scraper)
        print("Using scraper: {}".format(scraper.__name__))
    else:
        scraper = scrapers.guess_scraper(url)
        print("Guessed scraper: {}".format(scraper.__name__))

    scraped = scraper.scrape(url)

    out = args.out if args.out else urlparse(url).netloc
    outformat = args.outformat if args.outformat else "json"
    print("Outputting to: {}, using {} outputter".format(out, outformat))
    outputter = outputters.get_outputter(outformat)
    outputter.output(scraped, out)