/*
    SPDX-FileCopyrightText: 2016 Kai Uwe Broulik <kde@privat.broulik.de>

    SPDX-License-Identifier: LGPL-2.0-or-later
*/

import QtQuick 2.0
import QtQuick.Layouts 1.1
import QtGraphicalEffects 1.0

import org.kde.plasma.core 2.0 as PlasmaCore
import org.kde.plasma.components 3.0 as PlasmaComponents3
import org.kde.plasma.extras 2.0 as PlasmaExtras

import org.kde.kquickcontrolsaddons 2.0 as KQCAddons

import org.kde.plasma.private.notifications 2.0 as Notifications

import "global"

DraggableFileArea {
    id: thumbnailArea

    // The protocol supports multiple URLs but so far it's only used to show
    // a single preview image, so this code is simplified a lot to accommodate
    // this usecase and drops everything else (fallback to app icon or ListView
    // for multiple files)
    property var urls

    readonly property alias menuOpen: fileMenu.visible

    property int _pressX: -1
    property int _pressY: -1

    property int leftPadding: 0
    property int rightPadding: 0
    property int topPadding: 0
    property int bottomPadding: 0

    property alias actionContainer: thumbnailActionContainer

    signal openUrl(string url)
    signal fileActionInvoked(QtObject action)

    dragParent: previewPixmap
    dragUrl: thumbnailer.url
    dragPixmap: thumbnailer.pixmap

    implicitHeight: Math.max(thumbnailActionRow.implicitHeight + 2 * thumbnailActionRow.anchors.topMargin,
                             Math.round(Math.min(width / 3, width / thumbnailer.ratio)))
                    + topPadding + bottomPadding

    onActivated: thumbnailArea.openUrl(thumbnailer.url)
    onContextMenuRequested: {
        // avoid menu button glowing if we didn't actually press it
        menuButton.checked = false;

        fileMenu.visualParent = this;
        fileMenu.open(x, y);
    }

    Notifications.FileMenu {
        id: fileMenu
        url: thumbnailer.url
        visualParent: menuButton
        onActionTriggered: thumbnailArea.fileActionInvoked(action)
    }

    Notifications.Thumbnailer {
        id: thumbnailer

        readonly property real ratio: pixmapSize.height ? pixmapSize.width / pixmapSize.height : 1

        url: urls[0]
        // height is dynamic, so request a "square" size and then show it fitting to aspect ratio
        // Also use popupWidth instead of our width to ensure it is fixed and doesn't
        // change temporarily during (re)layouting
        size: Qt.size(Globals.popupWidth, Globals.popupWidth)
    }

    KQCAddons.QPixmapItem {
        id: previewBackground
        anchors.fill: parent
        fillMode: Image.PreserveAspectCrop
        layer.enabled: true
        opacity: 0.25
        pixmap: thumbnailer.pixmap
        layer.effect: FastBlur {
            source: previewBackground
            anchors.fill: parent
            radius: 30
        }
    }

    Item {
        anchors {
            fill: parent
            leftMargin: thumbnailArea.leftPadding
            rightMargin: thumbnailArea.rightPadding
            topMargin: thumbnailArea.topPadding
            bottomMargin: thumbnailArea.bottomPadding
        }

        KQCAddons.QPixmapItem {
            id: previewPixmap
            anchors.fill: parent
            pixmap: thumbnailer.pixmap
            smooth: true
            fillMode: Image.PreserveAspectFit
        }

        PlasmaCore.IconItem {
            anchors.centerIn: parent
            width: height
            height: PlasmaCore.Units.roundToIconSize(parent.height)
            usesPlasmaTheme: false
            source: !thumbnailer.busy && !thumbnailer.hasPreview ? thumbnailer.iconName : ""
        }

        PlasmaComponents3.BusyIndicator {
            anchors.centerIn: parent
            running: thumbnailer.busy
            visible: thumbnailer.busy
        }

        RowLayout {
            id: thumbnailActionRow
            anchors {
                top: parent.top
                left: parent.left
                right: parent.right
                margins: PlasmaCore.Units.smallSpacing
            }
            spacing: PlasmaCore.Units.smallSpacing

            Item {
                id: thumbnailActionContainer
                Layout.alignment: Qt.AlignTop
                Layout.fillWidth: true
                Layout.preferredHeight: childrenRect.height

                // actionFlow is reparented here
            }

            PlasmaComponents3.Button {
                id: menuButton
                Layout.alignment: Qt.AlignTop
                Accessible.name: tooltip.text
                icon.name: "application-menu"
                checkable: true

                onPressedChanged: {
                    if (pressed) {
                        // fake "pressed" while menu is open
                        checked = Qt.binding(function() {
                            return fileMenu.visible;
                        });

                        fileMenu.visualParent = this;
                        // -1 tells it to "align bottom left of visualParent (this)"
                        fileMenu.open(-1, -1);
                    }
                }

                PlasmaComponents3.ToolTip {
                    id: tooltip
                    text: i18nd("plasma_applet_org.kde.plasma.notifications", "More Options…")
                }
            }
        }
    }
}