import QtQml 2.14
import QtQuick 2.14
import QtQuick.Controls 2.14
import ScreenPlayWallpaper 1.0
import ScreenPlay.Enums.InstalledType 1.0

Rectangle {
    id: root

    property bool canFadeByWallpaperFillMode: true

    function init() {
        switch (Wallpaper.type) {
        case InstalledType.VideoWallpaper:
            loader.source = "qrc:/MultimediaView.qml";
            break;
        case InstalledType.HTMLWallpaper:
            loader.setSource("qrc:/qml/WebView.qml", {
                "url": Qt.resolvedUrl(Wallpaper.projectSourceFileAbsolute)
            });
            break;
        case InstalledType.QMLWallpaper:
            loader.source = Qt.resolvedUrl(Wallpaper.projectSourceFileAbsolute);
            fadeIn();
            break;
        case InstalledType.WebsiteWallpaper:
            loader.setSource("qrc:/qml/WebsiteWallpaper.qml", {
                "url": Wallpaper.projectSourceFileAbsolute
            });
            fadeIn();
            break;
        case InstalledType.GifWallpaper:
            loader.setSource("qrc:/qml/GifWallpaper.qml", {
                "source": Qt.resolvedUrl(Wallpaper.projectSourceFileAbsolute)
            });
            fadeIn();
            break;
        }
    }

    function fadeIn() {
        Wallpaper.setVisible(true);
        if (canFadeByWallpaperFillMode && Wallpaper.canFade)
            imgCover.state = "hideDefaultBackgroundImage";
        else
            imgCover.opacity = 0;
    }

    anchors.fill: parent
    color: {
        if (Qt.platform.os !== "windows")
            return "black";
        else
            return Wallpaper.windowsDesktopProperties.color;
    }
    Component.onCompleted: {
        init();
    }

    Connections {
        function onQmlExit() {
            if (canFadeByWallpaperFillMode && Wallpaper.canFade)
                imgCover.state = "exit";
            else
                Wallpaper.terminate();
        }

        function onQmlSceneValueReceived(key, value) {
            var obj2 = 'import QtQuick 2.0; Item {Component.onCompleted: loader.item.' + key + ' = ' + value + '; }';
            var newObject = Qt.createQmlObject(obj2.toString(), root, "err");
            newObject.destroy(10000);
        }

        // Replace wallpaper with QML Scene
        function onReloadQML(oldType) {
            loader.sourceComponent = undefined;
            loader.source = "";
            Wallpaper.clearComponentCache();
            loader.source = Qt.resolvedUrl(Wallpaper.projectSourceFileAbsolute);
        }

        // Replace wallpaper with GIF
        function onReloadGIF(oldType) {
            init();
        }

        // This function only gets called here (the same function
        // is inside the WebView.qml) when the previous Wallpaper type
        // was not a video
        function onReloadVideo(oldType) {
            // We need to check if the old type
            // was also Video not get called twice
            if (oldType === InstalledType.VideoWallpaper)
                return ;

            imgCover.state = "showDefaultBackgroundImage";
            loader.source = "qrc:/qml/WebView.qml";
        }

        target: Wallpaper
    }

    Loader {
        id: loader

        anchors.fill: parent
        // QML Engine deadlocks in 5.15.2 when a loader cannot load
        // an item. QApplication::quit(); waits for the destruction forever.
        asynchronous: true
        onStatusChanged: {
            if (loader.status === Loader.Error) {
                loader.source = "";
                Wallpaper.terminate();
            }
        }

        Connections {
            function onRequestFadeIn() {
                fadeIn();
            }

            ignoreUnknownSignals: true
            target: loader.item
        }

    }

    Image {
        id: imgCover

        state: "showDefaultBackgroundImage"
        sourceSize.width: Wallpaper.width
        sourceSize.height: Wallpaper.height
        source: {
            if (Qt.platform.os === "windows")
                return Qt.resolvedUrl("file:///" + Wallpaper.windowsDesktopProperties.wallpaperPath);
            else
                return ""
        }
        
        Component.onCompleted: {
            if (Qt.platform.os !== "windows") {
                root.canFadeByWallpaperFillMode = false;
                return ;
            }
            switch (Wallpaper.windowsDesktopProperties.wallpaperStyle) {
            case 10:
                imgCover.fillMode = Image.PreserveAspectCrop;
                break;
            case 6:
                imgCover.fillMode = Image.PreserveAspectFit;
                break;
            case 2:
                break;
            case 0:
                if (desktopProperties.isTiled) {
                    // Tiled
                    imgCover.fillMode = Image.Tile;
                } else {
                    // Center
                    imgCover.fillMode = Image.PreserveAspectFit;
                    imgCover.anchors.centerIn = parent;
                    imgCover.width = sourceSize.width;
                    imgCover.height = sourceSize.height;
                }
                break;
            case 22:
                root.canFadeByWallpaperFillMode = false;
                break;
            }
        }

        anchors {
            top: parent.top
            topMargin: -3 // To fix the offset from setupWallpaperForOneScreen
            left: parent.left
            right: parent.right
        }

        states: [
            State {
                name: "showDefaultBackgroundImage"

                PropertyChanges {
                    target: imgCover
                    opacity: 1
                }

            },
            State {
                name: "hideDefaultBackgroundImage"

                PropertyChanges {
                    target: imgCover
                    opacity: 0
                }

            },
            State {
                name: "exit"

                PropertyChanges {
                    target: imgCover
                    opacity: 1
                }

            }
        ]
        transitions: [
            Transition {
                from: "showDefaultBackgroundImage"
                to: "hideDefaultBackgroundImage"
                reversible: true

                SequentialAnimation {
                    PauseAnimation {
                        duration: 100
                    }

                    PropertyAnimation {
                        target: imgCover
                        duration: 600
                        property: "opacity"
                    }

                }

            },
            Transition {
                from: "hideDefaultBackgroundImage"
                to: "exit"
                reversible: true

                SequentialAnimation {
                    PropertyAnimation {
                        target: imgCover
                        duration: 600
                        property: "opacity"
                    }

                    ScriptAction {
                        script: Wallpaper.terminate()
                    }

                }

            }
        ]
    }

    Pane {
        id: debug

        visible: Wallpaper.debugMode
        enabled: Wallpaper.debugMode
        width: parent.width * 0.3
        height: parent.height * 0.3
        anchors.centerIn: parent

        Column {
            anchors.fill: parent
            anchors.margins: 20
            spacing: 10

            Text {
                text: "appID " + Wallpaper.appID
                font.pointSize: 14
            }

            Text {
                text: "projectPath " + Wallpaper.projectPath
                font.pointSize: 14
            }

            Text {
                text: "projectSourceFileAbsolute " + Wallpaper.projectSourceFileAbsolute
                font.pointSize: 14
            }

            Text {
                text: "fillMode " + Wallpaper.fillMode
                font.pointSize: 14
            }

            Text {
                text: "sdk.type " + Wallpaper.sdk.type
                font.pointSize: 14
            }

            Text {
                text: "sdk.isConnected " + Wallpaper.sdk.isConnected
                font.pointSize: 14
            }

            Text {
                text: "sdk.appID " + Wallpaper.sdk.appID
                font.pointSize: 14
            }

            Text {
                text: "canFadeByWallpaperFillMode " + canFadeByWallpaperFillMode
                font.pointSize: 14
            }

            Text {
                text: "Wallpaper.canFade " + Wallpaper.canFade
                font.pointSize: 14
            }

            Text {
                text: {
                    if (Qt.platform.os === "windows")
                    return "imgCover.source " + Qt.resolvedUrl("file:///" + Wallpaper.windowsDesktopProperties.wallpaperPath)
                    else 
                    return ""
                }
                font.pointSize: 14
            }

            Text {
                text: "imgCover.status " + imgCover.status
                font.pointSize: 14
            }

        }

        background: Rectangle {
            opacity: 0.5
        }

    }

}