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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.Widget {
	private sealed class HistoryRow : Gtk.Box {
		/**
		 * User requested to start the timer again.
		 */
		public signal void start(Model.Timer timer);

		/**
		 * User requested to delete this entry.
		 */
		public signal void remove(Model.Timer timer);

		/**
		 * User requested to edit this entry.
		 */
		public signal void edit(Model.Timer timer);

		public Model.Timer? timer { get; set; }

		private Gtk.Label title = new Gtk.Label("") {
			ellipsize = END,
			halign = START,
			css_classes = { "heading" },
		};

		private TimeSpan duration = new TimeSpan() {
			halign = START,
			valign = BASELINE,
			css_classes = { "caption" },
		};

		private Gtk.Label span = new Gtk.Label("") {
			halign = START,
		};

		private Adw.SplitButton actions = new Adw.SplitButton() {
			valign = START,
			label = "Start",
		};

		construct {
			var action_group = new SimpleActionGroup();

			var edit_action = new SimpleAction("Edit", null);
			edit_action.activate.connect(() => {
				if (timer != null) {
					edit(timer);
				}
			});
			action_group.add_action(edit_action);

			var delete_action = new SimpleAction("Delete", null);
			delete_action.activate.connect(() => {
				if (timer != null) {
					remove(timer);
				}
			});
			action_group.add_action(delete_action);

			this.insert_action_group("HistoryRow", action_group);

			this.orientation = HORIZONTAL;
			this.spacing = 16;

			var info = new Gtk.Box(VERTICAL, 6) {
				hexpand = true,
				hexpand_set = true,
			};

			var first_row = new Gtk.Box(HORIZONTAL, 8);

			first_row.append(title);
			first_row.append(duration);

			info.append(first_row);
			info.append(span);

			this.append(info);

			var menu = new Menu();
			menu.append("Edit", "HistoryRow.Edit");
			menu.append("Delete", "HistoryRow.Delete");
			actions.menu_model = menu;
			this.append(actions);

			actions.clicked.connect(() => {
				if (timer != null) {
					start(timer);
				}
			});
		}

		public void bind(Model.Timer timer) {
			this.timer = timer;

			render(timer);

			timer.notify.connect(on_timer_update);
		}

		public void unbind(Model.Timer timer) {
			this.timer = null;

			timer.notify.disconnect(on_timer_update);
		}

		private void on_timer_update(Object object, ParamSpec _params) {
			render((Model.Timer) object);
		}

		private void render(Model.Timer timer) {
			if (timer.title.length > 0) {
				title.label = timer.title;
				title.tooltip_text = timer.title;
				title.remove_css_class("dimmed");
			} else {
				title.label = "(No title)";
				title.add_css_class("dimmed");
			}

			var start = new DateTime.from_unix_local(timer.started_at);
			var end = new DateTime.from_unix_local(timer.stopped_at);
			duration.span = end.difference(start);

			var is_span_days = start.get_year() != end.get_year() || start.get_day_of_year() != end.get_day_of_year();
			span.label = "%s - %s".printf(
				start.format("%Y-%m-%d %H:%M"),
				is_span_days ? end.format("%Y-%m-%d %H:%M") : end.format("%H:%M")
			);
		}
	}
}