/*
 * Copyright (C) 2023, KylinSoft Co., Ltd.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */

import QtQuick 2.12
import QtQml 2.12

import AppUI 1.0 as AppUI
import AppControls2 1.0 as AppControls2
import org.ukui.menu.core 1.0

Item {
    id: root
    clip: true
    property int animationDuration: 150

    Component.onCompleted: {
        loader.reloadUI();
        mainWindow.beforeFullScreenChanged.connect(beforeFullScreenSlot);
        mainWindow.fullScreenChanged.connect(fullScreenChangedSlot);
    }

    function fullScreenChangedSlot() {
        loader.opacity = 0;
        fullScreenAnimation.start();
    }

    function beforeFullScreenSlot(status) {
        if (!status) {
            loader.sourceComponent = undefined;
        }
        backgroundMask.alpha = status ? 0.5 : 0
        backgroundMask.enableSizeChange = false;
    }

    ParallelAnimation {
        id: fullScreenAnimation
        NumberAnimation { target: backgroundMask; property: "width"; to: root.width; duration: root.animationDuration }
        NumberAnimation { target: backgroundMask; property: "height"; to: root.height; duration: root.animationDuration }

        onFinished: {
            backgroundMask.enableSizeChange = true;
            loader.reloadUI();
        }
    }

    AppControls2.StyleBackground {
        id: backgroundMask
        anchors.left: parent.left
        anchors.bottom: parent.bottom
        alpha: 0
        useStyleTransparent: false
        paletteRole: Palette.Dark

        property bool enableSizeChange: true

        states: [
            State {
                name: "disableSizeChange"
                when: !backgroundMask.enableSizeChange
                AnchorChanges {
                    target: backgroundMask
                    anchors.top: undefined
                    anchors.right: undefined
                }
            },
            State {
                name: "enableSizeChange"
                when: backgroundMask.enableSizeChange
                AnchorChanges {
                    target: backgroundMask
                    anchors.top: parent.top
                    anchors.right: parent.right
                }
            }
        ]

        Loader {
            id: loader
            anchors.fill: parent
            Behavior on opacity {
                NumberAnimation { duration: root.animationDuration }
            }
            function reloadUI() {
                loader.sourceComponent = mainWindow.isFullScreen ? fullSceenComponent : normalComponent;
                loader.opacity = 1;
            }
        }
    }

    Component {
        id: fullSceenComponent
        AppUI.FullScreenUI {}
    }

    Component {
        id: normalComponent
        AppUI.NormalUI {}
    }
}