#!/usr/bin/python3

from util.str_to_datetime import datetime

from model.DataStore import DataStore
from model.TimeSlot import TimeSlot

from util.views import convert_to_table
from util.parser import create_parser


if __name__ == "__main__":
    parser = create_parser()
    args = parser.parse_args()

    ds = DataStore("data.json")

    if args.command == "ls":
        print(convert_to_table(ds.get_all_time_slots()))

    elif args.command == "start":
        time_slots = ds.get_all_time_slots()
        running = list(filter(lambda x: x.end is None, time_slots))
        if len(running):
            print("An event is already running.")
        else:
            if args.start is not None:
                ds.add_time_slot(TimeSlot(args.name, start=datetime(args.start)))
            else:
                ds.add_time_slot(TimeSlot(args.name))
            print(f"Started event {args.name}.")

    elif args.command == "end":
        time_slots = ds.get_all_time_slots()
        running = list(filter(lambda x: x.end is None, time_slots))
        if len(running) <= 0:
            print("No running event.")
        elif len(running) > 1:
            raise Exception("Found multiple running event.")
        else:
            if args.end is not None:
                running[0].end = datetime(args.end)
            else:
                running[0].end_now()
            ds.write_update()
            print(f"Ended event {running[0].name}.")

    elif args.command == "ps":
        time_slots = ds.get_all_time_slots()
        running = list(filter(lambda x: x.end is None, time_slots))
        print(convert_to_table(running))

    elif args.command == "add":
        time_slots = ds.get_all_time_slots()
        running = list(filter(lambda x: x.end is None, time_slots))
        if len(running) > 0 and args.end is None:
            print("An event is already running.")
        else:
            ts = TimeSlot(args.name)
            if args.start is not None:
                ts.start = datetime(args.start)
            if args.end is not None:
                ts.end = datetime(args.end)
            ds.add_time_slot(ts)
            ds.write_update()
            print("The event was added.")