import sys
import logging
import argparse

import prompter
import tagtimerc
import timer
import taglog


def get_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser(
        prog="TagTime",
        description=("TagTime compatible with "
                     "the original Perl implementation."),
        formatter_class=argparse.RawTextHelpFormatter)

    parser.add_argument('--rc',
                        metavar='tagtimerc',
                        default='~/.tagtimerc',
                        help="""Path to tagtimerc (default: %(default)s)""",
                        type=str)
    parser.set_defaults(func=None)
    subparsers = parser.add_subparsers()

    p1 = subparsers.add_parser('daemon', help="Run in daemon mode")
    p1.set_defaults(func=daemon)
    p1.add_argument('--prompt', metavar="mode",
                    choices=["legacy", "gui"],
                    default="legacy", type=str,
                    help='Prompt via another terminal or via GUI popup.')

    p2 = subparsers.add_parser('ping', help="Answer a single ping")
    p2.add_argument('--time', type=int, help="Ping time")
    p2.add_argument('--log_file', type=str, help='Ping into this file')
    p2.add_argument('--previous_tags', type=str,
                    help='String of previous tags for ditto feature.')
    p2.set_defaults(func=ping)

    p3 = subparsers.add_parser('merge', help="Merge two or more logs")
    p3.set_defaults(func=merge)

    p4 = subparsers.add_parser('validate', help="Validate log file")
    p4.add_argument('--log_file', type=str, help='Grep from this log')
    p4.set_defaults(func=validate)

    p5 = subparsers.add_parser('grep', help='Get pings between start and end')
    p5.add_argument('--log_file', type=str, help='Grep from this log')
    p5.set_defaults(func=grep)
    p5.add_argument('start', type=str, help='Start in %Y.%m.%d')
    p5.add_argument('end', type=str, help='End in %Y.%m.%d')

    return parser.parse_args()


def daemon(rc: tagtimerc.TagTimeRc, args: argparse.Namespace):
    if args.prompt == "gui":
        p = prompter.Prompter(rc, True)
    else:
        p = prompter.Prompter(rc)
    p.daemon()


def ping(rc: tagtimerc.TagTimeRc, args: argparse.Namespace):
    rc.log_file = args.log_file if args.log_file else rc.log_file
    p = prompter.Prompter(rc)
    args.time = args.time if args.time else p.timer.time_now()
    p.ping(args.time, args.previous_tags)


def merge(rc: tagtimerc.TagTimeRc, args: argparse.Namespace):
    raise Exception()


def validate(rc: tagtimerc.TagTimeRc, args: argparse.Namespace):
    if args.log_file:
        rc.log_file = args.log_file
    log = taglog.TagLog(rc.log_file)
    log.validate()


def grep(rc: tagtimerc.TagTimeRc, args: argparse.Namespace):
    if args.log_file:
        rc.log_file = args.log_file
    log = taglog.TagLog(rc.log_file)
    start = timer.date_str_to_time(args.start)
    end = timer.date_str_to_time(args.end)
    for p in log.grep(start, end):
        print(p.line.strip())


def main():
    logging.basicConfig(format='%(message)s', level=logging.DEBUG)
    args = get_args()
    rc = tagtimerc.parse_tagtimerc(args.rc)

    if args.func:
        args.func(rc, args)
    else:
        logging.error("Usage: TagTime Option (or --help)")
        sys.exit(1)


if __name__ == "__main__":
    main()