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// Copyright 2026 Shota FUJI
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0

namespace PlacGtkAdwaita {
	[GtkTemplate(ui = "/jp/pocka/plac/gtk-adwaita/ui/keyboard-shortcut-row.ui")]
	class KeyboardShortcutRow : Adw.PreferencesRow {
		public signal void capture_started();
		public signal void cancelled();
		public signal void configured(string new_accelerator);

		public string label { get; set construct; }
		public string accelerator { get; set construct; default = ""; }
		public bool capturing { get; set; default = false; }

		[GtkChild]
		private unowned Gtk.Button change;

		[GtkChild]
		private unowned Gtk.Button clear;

		public KeyboardShortcutRow(string label) {
			Object(label: label, accelerator: "");
		}

		construct {
			var controller = new Gtk.EventControllerKey();
			this.add_controller(controller);

			this.notify["capturing"].connect(() => {
				change.label = capturing ? "Cancel" : "Edit";
			});

			this.activate.connect(() => {
				if (!this.capturing) {
					this.start_capture();
				}
			});

			change.clicked.connect(() => {
				if (!this.capturing) {
					this.start_capture();
				} else {
					this.cancel_capture();
				}
			});

			clear.clicked.connect(() => {
				this.capturing = false;
				this.configured("");
			});

			controller.key_pressed.connect((_self, keyval, keycode, modifier) => {
				if (!capturing) {
					return false;
				}

				switch (keyval) {
					case Gdk.Key.Escape:
						this.cancel_capture();
						return true;
					case Gdk.Key.Tab:
						this.cancel_capture();
						return false;
					case Gdk.Key.space:
					case Gdk.Key.Return:
					// Modifier keys
					case Gdk.Key.Control_L:
					case Gdk.Key.Control_R:
					case Gdk.Key.Shift_L:
					case Gdk.Key.Shift_R:
					case Gdk.Key.Alt_L:
					case Gdk.Key.Alt_R:
					case Gdk.Key.Meta_L:
					case Gdk.Key.Meta_R:
					case Gdk.Key.Super_L:
					case Gdk.Key.Super_R:
					case Gdk.Key.Hyper_L:
					case Gdk.Key.Hyper_R:
						return true;
				}

				this.end_capture(keyval, modifier);
				return true;
			});
		}

		private void start_capture() {
			this.capturing = true;
			this.capture_started();
		}

		private void cancel_capture() {
			this.capturing = false;
			this.cancelled();
		}

		private void end_capture(uint keyval, Gdk.ModifierType modifiers) {
			this.capturing = false;
			this.configured(Gtk.accelerator_name(keyval, modifiers));
		}
	}
}