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// Copyright 2025 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 {
class Artwork : Gtk.Box {
	private uint16 _width = 100;
	public uint16 width {
		get { return _width; }
		construct set {
			_width = value;
			width_request = (int) value;
		}
	}

	private uint16 _height = 100;
	public uint16 height {
		get { return _height; }
		construct set {
			_height = value;
			height_request = (int) value;
		}
	}

	private Plac.AsyncConnection? _conn = null;
	public Plac.AsyncConnection? conn {
		get { return _conn; }
		set {
			if (_conn != value) {
				_conn = value;
				render();
			}
		}
	}

	private string? _image_key = null;
	public string? image_key {
		get { return _image_key; }
		set {
			if (_image_key != value) {
				_image_key = value;
				render();
			}
		}
	}

	public Plac.Image.ScalingMethod scaling { get; set; default = FIT; }

	private Gtk.Picture picture = new Gtk.Picture();
	private Adw.Spinner spinner = new Adw.Spinner();
	private Gtk.Image error_icon = new Gtk.Image.from_icon_name("image-missing-symbolic");

	public Artwork() {
		Object();
	}

	public Artwork.new_with_size(uint16 width, uint16 height) {
		Object(width: width, height: height);
	}

	construct {
		picture.set_parent(this);
		picture.accessible_role = PRESENTATION;
		picture.halign = CENTER;
		picture.valign = CENTER;
		picture.width_request = _width;
		picture.height_request = _height;
		picture.content_fit = SCALE_DOWN;
		picture.add_css_class("plac-playback-artwork");
		picture.visible = false;

		spinner.set_parent(this);
		spinner.halign = CENTER;
		spinner.valign = CENTER;
		spinner.width_request = _width;
		spinner.height_request = _height;
		spinner.visible = true;

		error_icon.set_parent(this);
		error_icon.halign = CENTER;
		error_icon.valign = CENTER;
		error_icon.width_request = _width;
		error_icon.height_request = _height;
		error_icon.pixel_size = _width / 2;
		error_icon.visible = false;

		render();
	}

	public void render() {
		picture.paintable = null;
		if (_conn == null || _image_key == null) {
			return;
		}

		picture.visible = false;
		spinner.visible = true;
		error_icon.visible = false;

		var opts = new Plac.Image.GetOptions();
		opts.set_size(scaling, _width, _height);
		opts.set_content_type(JPEG);

		_conn.get_image.begin(_image_key, opts, (obj, res) => {
				var result = _conn.get_image.end(res);
				if (result == null) {
					GLib.log("Plac", LEVEL_WARNING, "Failed to download image: Out of memory");
					error_icon.visible = true;
					spinner.visible = false;
					return;
				}

				if (result.code != OK) {
					GLib.log("Plac", LEVEL_WARNING, "Failed to download image: %s", result.code.to_string());
					error_icon.visible = true;
					spinner.visible = false;
					return;
				}

				if (result.image == null) {
					GLib.log("Plac", LEVEL_WARNING, "Failed to download image: image_field_missing");
					error_icon.visible = true;
					spinner.visible = false;
					return;
				}

				var bytes = GLib.Bytes.new_with_owner(result.image.data, result.image);
				try {
					var texture = Gdk.Texture.from_bytes(bytes);
					picture.paintable = texture;
					spinner.visible = false;
					picture.visible = true;
				} catch (GLib.Error error) {
					GLib.log("Plac", LEVEL_WARNING, "Failed to generate artwork texture: %s", error.message);
				}
			});
	}
}
}