#!/usr/bin/env python3

import httplib2
import json
import socket
import sys


def parse_links(filename):
    """Returns a list of links from JSON object"""
    data = json.load(open(filename))
    links = []
    for entry in data['entries']:
        link = entry['Link']
        https = True if link.startswith('https') else False
        x = {
            'link': link,
            'https': https,
        }
        links.append(x)
    return links


def validate_links(links):
    """Checks each entry in JSON file for live link"""
    print('Validating {} links...'.format(len(links)))
    errors = []
    for each in links:
        link = each['link']
        h = httplib2.Http(disable_ssl_certificate_validation=True, timeout=5)
        try:
            resp = h.request(link, 'HEAD')
            code = int(resp[0]['status'])
            # check if status code is a client or server error
            if code >= 404:
                errors.append('{}: {}'.format(code, link))
        except TimeoutError:
            errors.append("TMO: " + link)
        except socket.error as socketerror:
            errors.append("SOC: {} : {}".format(socketerror, link))
    return errors

if __name__ == "__main__":
    num_args = len(sys.argv)
    if num_args < 2:
        print("No .json file passed")
        sys.exit(1)
    errors = validate_links(parse_links(sys.argv[1]))
    if len(errors) > 0:
        for err in errors:
            print(err)
        sys.exit(1)