/*
 *  SPDX-FileCopyrightText: 2019 Marco Martin <mart@kde.org>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */

import QtQuick
import QtQuick.Layouts
import QtQuick.Controls as Controls
import Qt5Compat.GraphicalEffects

import org.kde.plasma.core as PlasmaCore
import org.kde.plasma.components 3.0 as PlasmaComponents
import org.kde.plasma.extras as PlasmaExtras
import org.kde.kquickcontrolsaddons

import org.kde.plasma.private.mobileshell as MobileShell
import org.kde.private.mobile.homescreen.halcyon as Halcyon

import org.kde.kirigami as Kirigami

MouseArea {
    id: delegate
    width: GridView.view.cellWidth
    height: GridView.view.cellHeight

    property Halcyon.Application application: model.application
    
    property int reservedSpaceForLabel
    property alias iconItem: icon

    readonly property real margins: Math.floor(width * 0.2)

    signal launch(int x, int y, var source, string title, string storageId)
    
    function openContextMenu() {
        dialogLoader.active = true;
    }
    
    cursorShape: Qt.PointingHandCursor
    acceptedButtons: Qt.LeftButton | Qt.RightButton
    onPressAndHold: openContextMenu()
    
    function launchApp() {
        // launch app
        if (application.running) {
            delegate.launch(0, 0, "", application.name, application.storageId);
        } else {
            delegate.launch(delegate.x + (PlasmaCore.Units.smallSpacing * 2), delegate.y + (PlasmaCore.Units.smallSpacing * 2), icon.source, application.name, application.storageId);
        }
    }

    Loader {
        id: dialogLoader
        active: false

        sourceComponent: MobileShell.PopupMenu {
            id: popup

            mappedGlobalCoordinates: icon.mapToGlobal(icon.x, icon.y)
            relatedTo: icon

            title: label.text
            menuActions: [
                Kirigami.Action {
                    iconName: "emblem-favorite"
                    text: i18n("Add to favourites")
                    onTriggered: Halcyon.PinnedModel.addApp(application.storageId, 0);
                }
            ]

            onVisibleChanged: {
                if (!popup.visible) {
                    dialogLoader.active = false;
                }
            }
        }

        onLoaded: item.showOverlay()
    }

    // grow/shrink animation
    property real zoomScale: 1
    transform: Scale { 
        origin.x: delegate.width / 2; 
        origin.y: delegate.height / 2; 
        xScale: delegate.zoomScale
        yScale: delegate.zoomScale
    }
    
    property bool launchAppRequested: false
    
    NumberAnimation on zoomScale {
        id: shrinkAnim
        running: false
        duration: MobileShell.MobileShellSettings.animationsEnabled ? 80 : 1
        to: MobileShell.MobileShellSettings.animationsEnabled ? 0.8 : 1
        onFinished: {
            if (!delegate.pressed) {
                growAnim.restart();
            }
        }
    }
    
    NumberAnimation on zoomScale {
        id: growAnim
        running: false
        duration: MobileShell.MobileShellSettings.animationsEnabled ? 80 : 1
        to: 1
        onFinished: {
            if (delegate.launchAppRequested) {
                delegate.launchApp();
                delegate.launchAppRequested = false;
            }
        }
    }
    
    onPressedChanged: {
        if (pressed) {
            growAnim.stop();
            shrinkAnim.restart();
        } else if (!pressed && !shrinkAnim.running) {
            growAnim.restart();
        }
    }
    // launch app handled by press animation
    onClicked: mouse => {
                   if (mouse.button === Qt.RightButton) {
                       openContextMenu();
                   } else {
                       launchAppRequested = true;
                   }
               }
    
    ColumnLayout {
        id: columnLayout

        anchors {
            fill: parent
            leftMargin: margins
            topMargin: margins
            rightMargin: margins
            bottomMargin: margins
        }
        spacing: 0

        PlasmaCore.IconItem {
            id: icon

            Kirigami.Theme.inherit: false
            Kirigami.Theme.colorSet: Kirigami.Theme.Complementary
            
            Layout.alignment: Qt.AlignHCenter | Qt.AlignTop
            Layout.fillWidth: true
            Layout.preferredHeight: Math.floor(parent.height - delegate.reservedSpaceForLabel)
            Layout.maximumHeight: labelFontMetrics.height * 7
            Layout.topMargin: Math.max(0, Layout.preferredHeight - height)

            source: application.icon

            Rectangle {
                anchors {
                    horizontalCenter: parent.horizontalCenter
                    bottom: parent.bottom
                }
                visible: application.running
                radius: width
                width: PlasmaCore.Units.smallSpacing
                height: width
                color: theme.highlightColor
            }
            
            // darken effect when hovered/pressed
            layer {
                enabled: delegate.pressed
                effect: ColorOverlay {
                    color: Qt.rgba(0, 0, 0, 0.3)
                }
            }
            
            FontMetrics {
                id: labelFontMetrics
                font: label.font
            }
        }

        PlasmaComponents.Label {
            id: label
            visible: text.length > 0

            Layout.fillWidth: true
            Layout.preferredHeight: delegate.reservedSpaceForLabel
            Layout.topMargin: PlasmaCore.Units.smallSpacing
            Layout.leftMargin: -parent.anchors.leftMargin + PlasmaCore.Units.smallSpacing
            Layout.rightMargin: -parent.anchors.rightMargin + PlasmaCore.Units.smallSpacing
            
            wrapMode: Text.WordWrap
            maximumLineCount: 2
            horizontalAlignment: Text.AlignHCenter
            verticalAlignment: Text.AlignTop
            elide: Text.ElideRight

            text: application.name

            font.pointSize: theme.defaultFont.pointSize * 0.85
            font.weight: Font.Bold
            color: "white"
        }
    }
}