/*
 *  Copyright 2019 Marco Martin <mart@kde.org>
 *
 *  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 2 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, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  2.010-1301, USA.
 */

import QtQuick 2.4
import QtQuick.Layouts 1.1
import QtQuick.Controls 2.3 as Controls

import org.kde.plasma.plasmoid 2.0
import org.kde.plasma.core 2.0 as PlasmaCore
import org.kde.plasma.components 2.0 as PlasmaComponents
import org.kde.kquickcontrolsaddons 2.0


Controls.Control {
    id: delegate

    z: dragging ? 1 : 0

    property var modelData: typeof model !== "undefined" ? model : null
    property bool dragging
    property Controls.Control dragDelegate

    Drag.active: false
    Drag.hotSpot.x: delegate.width/2
    Drag.hotSpot.y: delegate.height/2
    Drag.mimeData: { "text/uri-list": modelData ? "file://" + modelData.ApplicationDesktopRole : "" }
    Drag.dragType: Drag.Automatic

    leftPadding: units.smallSpacing*2
    topPadding: units.smallSpacing*2
    rightPadding: units.smallSpacing*2
    bottomPadding: units.smallSpacing*2

    opacity: dragging ? 0.4 : 1

    onDraggingChanged: {
        if (dragging) {
            dragDelegate.x = delegate.x
            dragDelegate.y = delegate.y
            dragDelegate.modelData = model;
            root.reorderingApps = true;
        } else {
            dragDelegate.modelData = null;
            root.reorderingApps = false;
        }
    }
    contentItem: MouseArea {
        drag.target: dragging ? dragDelegate : null

        onClicked: {
            if (modelData.ApplicationStartupNotifyRole) {
                clickFedbackAnimation.target = delegate;
                clickFedbackAnimation.running = true;
                feedbackWindow.title = modelData.ApplicationNameRole;
                feedbackWindow.state = "open";
            }
            plasmoid.nativeInterface.applicationListModel.runApplication(modelData.ApplicationStorageIdRole);
        }
    
        onPressAndHold: {
            delegate.dragging = true;
        }

        onReleased: delegate.dragging = false;

        onCanceled: delegate.dragging = false;

        onPositionChanged: {
            if (!dragging || !dragDelegate) {
                return;
            }

            if (dragDelegate.x + dragDelegate.width < 0
                || dragDelegate.y + dragDelegate.height < 0
                || dragDelegate.x > applicationsFlow.width
                || dragDelegate.y > applicationsFlow.height) {
                dragging = false;
                delegate.grabToImage(function(result) {
                    root.externalDragStarted();
                    delegate.Drag.imageSource = result.url;
                    delegate.Drag.active = true;
                })
                return;
            }

            var newRow = Math.round(applicationsFlow.width / dragDelegate.width) * Math.floor((dragDelegate.y+dragDelegate.height/2) / dragDelegate.height) + Math.floor((dragDelegate.x+dragDelegate.width/2) / dragDelegate.width);

            plasmoid.nativeInterface.applicationListModel.moveItem(modelData.index, newRow);
        }

        ColumnLayout {
            anchors.fill: parent
            spacing: 0
            PlasmaCore.IconItem {
                id: icon

                Layout.alignment: Qt.AlignHCenter | Qt.AlignTop
                Layout.fillWidth: true
                Layout.preferredHeight: parent.height - root.reservedSpaceForLabel

                source: modelData ? modelData.ApplicationIconRole : ""
                scale: root.reorderingApps && dragDelegate && !dragging ? 0.6 : 1
                Behavior on scale {
                    NumberAnimation {
                        duration: units.longDuration
                        easing.type: Easing.InOutQuad
                    }
                }
            }

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

                Layout.fillWidth: true
                Layout.fillHeight: true
                wrapMode: Text.WordWrap
                horizontalAlignment: Text.AlignHCenter
                verticalAlignment: Text.AlignTop
                maximumLineCount: 2
                elide: Text.ElideRight

                text: modelData ? modelData.ApplicationNameRole : ""
                font.pixelSize: theme.defaultFont.pixelSize
                color: PlasmaCore.ColorScope.textColor
            }
        }
    }
}