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 // SPDX-FileCopyrightText: 2023 James Graham <james.h.graham@protonmail.com>
 // SPDX-License-Identifier: LGPL-2.0-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
 
 import QtQuick 2.15
 import QtQuick.Controls 2.15 as QQC2
 import QtQuick.Layouts 1.15
 import Qt.labs.platform 1.1
 
 import org.kde.kirigami 2.15 as Kirigami
 
 Item {
     id: root
 
     /**
      * @brief The source for the image to be viewed.
      */
     required property string source
 
     /**
      * @brief The size of the source image.
      *
      * This is used to calculate the maximum size of the content and temporary image.
      */
     required property real sourceWidth
 
     /**
      * @brief The size of the source image.
      *
      * This is used to calculate the maximum size of the content and temporary image.
      */
     required property real sourceHeight
 
     /**
      * @brief Source for the temporary content.
      *
      * Typically used when downloading the image to show a thumbnail or other
      * temporary image while the main image downloads.
      */
     required property string tempSource
 
     /**
      * @brief The caption for the item.
      *
      * Typically set to the filename if no caption is available.
      *
      * @note Declared here so that parent components can access this parameter
      *       when used as a listView delegate.
      */
     required property string caption
 
     /**
      * @brief The delegate type for this item.
      *
      * @note Declared here so that parent components can access this parameter
      *       when used as a listView delegate.
      */
     readonly property int type: AlbumModelItem.Image
 
     /**
      * @brief The padding around the content image.
      *
      * The padding is factored in when calculating the maximum size of the content
      * image.
      */
     property var padding: Kirigami.Units.largeSpacing
 
     /**
      * @brief Multiple by which the image is scaled.
      */
     property var scaleFactor: 1
 
     /**
      * @brief The angle by which the content image is rotated.
      *
      * The default orientation of the image is 0 degrees.
      */
     property int rotationAngle: 0
 
     /**
      * @brief Emitted when the background space around the content item is clicked.
      */
     signal backgroundClicked()
 
     /**
      * @brief Emitted when the content image is right clicked.
      */
     signal itemRightClicked()
 
     /**
      * @brief Start media playback.
      */
     function play() {
         image.paused = false
     }
 
     /**
      * @brief Pause media playback.
      */
     function pause() {
         image.paused = true
     }
 
     clip: true
 
     // AnimatedImage so we can handle GIFs.
     AnimatedImage {
         id: image
 
         property var rotationInsensitiveWidth: {
             if (sourceWidth > 0) {
                 return Math.min(root.sourceWidth, root.width - root.padding * 2);
             } else {
                 return Math.min(sourceSize.width, root.width - root.padding * 2);
             }
         }
         property var rotationInsensitiveHeight: {
             if (sourceHeight > 0) {
                 return Math.min(root.sourceHeight, root.height - root.padding * 2)
             } else {
                 return Math.min(sourceSize.height, root.height - root.padding * 2)
             }
         }
 
         anchors.centerIn: parent
 
         source: root.source
 
         width: root.rotationAngle % 180 === 0 ? rotationInsensitiveWidth : rotationInsensitiveHeight
         height: root.rotationAngle % 180 === 0 ? rotationInsensitiveHeight : rotationInsensitiveWidth
         fillMode: Image.PreserveAspectFit
         clip: true
 
         Behavior on width {
             NumberAnimation {duration: Kirigami.Units.longDuration; easing.type: Easing.InOutCubic}
         }
         Behavior on height {
             NumberAnimation {duration: Kirigami.Units.longDuration; easing.type: Easing.InOutCubic}
         }
 
         Image {
             id: tempImage
             anchors.centerIn: parent
             visible: source && status === Image.Ready && image.status !== Image.Ready
             width:  root.sourceWidth > 0 || image.sourceSize.width > 0 ? root.sourceWidth : tempImage.sourceSize.width
             height: root.sourceHeight > 0 || image.sourceSize.height > 0 ? root.sourceHeight : tempImage.sourceSize.height
             source: root.tempSource
         }
 
         transform: [
             Rotation {
                 origin.x: image.width / 2
                 origin.y: image.height / 2
                 angle: root.rotationAngle
 
                 Behavior on angle {
                     RotationAnimation {duration: Kirigami.Units.longDuration; easing.type: Easing.InOutCubic}
                 }
             },
             Scale {
                 origin.x: image.width / 2
                 origin.y: image.height / 2
                 xScale: root.scaleFactor
                 yScale: root.scaleFactor
 
                 Behavior on xScale {
                     NumberAnimation {duration: Kirigami.Units.longDuration; easing.type: Easing.InOutCubic}
                 }
                 Behavior on yScale {
                     NumberAnimation {duration: Kirigami.Units.longDuration; easing.type: Easing.InOutCubic}
                 }
             }
         ]
 
         MouseArea {
             anchors.fill: parent
             acceptedButtons: Qt.RightButton
             onClicked: root.itemRightClicked()
         }
     }
     QQC2.BusyIndicator {
         anchors.centerIn: parent
         visible: image.status !== Image.Ready && tempImage.status !== Image.Ready
         running: visible
     }
     MouseArea {
         anchors.fill: parent
         acceptedButtons: Qt.LeftButton
         onClicked: root.backgroundClicked()
     }
 }