"""
Command line utility for spider, export etc.
"""

import argparse
import logging
import signal
import sys
import json

from google.cloud import datastore

def handle_sigint(signum, frame):
    """
    Handles SIGINT, which occurs on Ctrl-C
    """
    print("\nInterrupted by SIGINT\n")
    sys.exit()


if __name__ == "__main__":
    signal.signal(signal.SIGINT, handle_sigint)

    parser = argparse.ArgumentParser()

    # global flags
    parser.add_argument('--credentials-path', dest='credentials_path',
                        help='Path to the service account credentials JSON file',
                        default='/secrets/service-account.json')
    
    parser.add_argument('--loglevel', help="error, warn, info, or debug (default: info)",
                        default='info')

    # subcommands
    subparsers = parser.add_subparsers(help='sub-command help', dest='command')

    # 'spider' subcommand to execute a job from the queue and store the result.
    spider_parser = subparsers.add_parser('spider', help='Execute a spider job from the queue and store the result.')
    spider_parser.add_argument('--job', help='JSON job data')

    # 'dryrun' subcommand to spider one URL without writing results back.
    dryrun_parser = subparsers.add_parser('dryrun', help='Spider an arbitrary URL without storing results. ')
    dryrun_parser.add_argument('url', help='Spider a URL instead of using jobs from the queue. For testing/debugging only.')
    
    # manager subcommand
    manager_parser = subparsers.add_parser('manager', help='Adds spider jobs to the queue. By default, all green-directory URLs are added.')
    manager_parser.add_argument('--url', help='Add a job to spider a specific URL')

    # export subcommand
    export_parser = subparsers.add_parser('export', help='Export JSON data')
    export_parser.add_argument('--kind', default='spider-results', help='Datastore entity kind to export (default: spider-results)')


    args = parser.parse_args()

    # set log level
    logging.getLogger("urllib3").setLevel(logging.CRITICAL)

    loglevel = args.loglevel.lower()
    if loglevel == 'error':
        logging.basicConfig(level=logging.ERROR)
    elif loglevel == 'warn':
        logging.basicConfig(level=logging.WARN)
    elif loglevel == 'debug':
        logging.basicConfig(level=logging.DEBUG)
        logging.getLogger("selenium").setLevel(logging.INFO)
    else:
        logging.basicConfig(level=logging.INFO)
        loglevel = 'info'

    logging.debug("Called command %s", args.command)

    if args.command == 'manager':
        import manager
        manager.create_jobs(args.url)
    
    elif args.command == 'export':
        import export
        datastore_client = datastore.Client.from_service_account_json(args.credentials_path)
        export.export_results(datastore_client, args.kind)

    elif args.command == 'dryrun':
        from spider import spider
        from export.datetimeencoder import DateTimeEncoder

        result = spider.check_and_rate_site({"url": args.url, "type": "REGIONAL_CHAPTER", "level": "DE:KREISVERBAND", "state": "Unnamed", "district": "Unnamed"})        
        print(json.dumps(result, indent=2, sort_keys=True, ensure_ascii=False, cls=DateTimeEncoder))

    elif args.command == 'spider':
        from spider import spider
        datastore_client = datastore.Client.from_service_account_json(args.credentials_path)
        job = json.loads(args.job)
        spider.execute_single_job(datastore_client, job, "spider-results")

    else:
        parser.print_help()
        sys.exit(1)