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// Copyright 2025 Shota FUJI
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
//
// SPDX-License-Identifier: MPL-2.0

using GLib;

namespace TimeTracker.Model {
	public sealed class Model : Object {
		public ListStore active_timers { get; internal set; }
		public ListStore stopped_timers { get; internal set; }

		public Model() {
			Object(
				active_timers: new ListStore(typeof (Timer)),
				stopped_timers: new ListStore(typeof (Timer))
			);
		}

		// Since Vala's type narrowing is half baked, cast inside branch may or may not be narrowed
		// down. Explicit cast means compiler fails narrowing at that branch.
		public void update(Event.Event event) {
			if (event is Event.TimerStarted) {
				var timer = new Timer(event.timer_id, event.title, event.created_at);
				active_timers.append(timer);
				return;
			}

			if (event is Event.TimerTitleChanged) {
				Event.TimerTitleChanged e = (Event.TimerTitleChanged) event;

				for (uint i = 0; i < active_timers.n_items; i++) {
					var timer = (Timer) active_timers.get_item(i);
					if (timer.id == e.timer_id) {
						timer.title = e.new_title;
						return;
					}
				}

				for (uint i = 0; i < stopped_timers.n_items; i++) {
					var timer = (Timer) stopped_timers.get_item(i);
					if (timer.id == e.timer_id) {
						timer.title = e.new_title;
						return;
					}
				}

				return;
			}

			if (event is Event.TimerStopped) {
				Event.TimerStopped e = (Event.TimerStopped) event;

				for (uint i = 0; i < active_timers.n_items; i++) {
					var timer = (Timer) active_timers.get_item(i);
					if (timer.id == e.timer_id) {
						active_timers.remove(i);
						timer.stopped_at = e.created_at;
						timer.is_stopped = true;
						stopped_timers.append(timer);
						return;
					}
				}

				return;
			}

			if (event is Event.TimerDeleted) {
				Event.TimerDeleted e = (Event.TimerDeleted) event;

				for (uint i = 0; i < active_timers.n_items; i++) {
					var timer = (Timer) active_timers.get_item(i);
					if (timer.id == e.timer_id) {
						active_timers.remove(i);
						return;
					}
				}

				for (uint i = 0; i < stopped_timers.n_items; i++) {
					var timer = (Timer) stopped_timers.get_item(i);
					if (timer.id == e.timer_id) {
						stopped_timers.remove(i);
						return;
					}
				}

				return;
			}

			info(@"Unknown event found: id=$(event.event_id)");
		}
	}
}