/****************************************************************************
**
** Copyright (C) 2019 Luxoft Sweden AB
** Copyright (C) 2018 Pelagicore AG
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Neptune 3 UI.
**
** $QT_BEGIN_LICENSE:GPL-QTAS$
** Commercial License Usage
** Licensees holding valid commercial Qt Automotive Suite licenses may use
** this file in accordance with the commercial license agreement provided
** with the Software or, alternatively, in accordance with the terms
** contained in a written agreement between you and The Qt Company.  For
** licensing terms and conditions see https://www.qt.io/terms-conditions.
** For further information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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** $QT_END_LICENSE$
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** SPDX-License-Identifier: GPL-3.0
**
****************************************************************************/

import QtQuick 2.10
import QtGraphicalEffects 1.0
import shared.animations 1.0
import home 1.0
import launcher 1.0
import shared.utils 1.0

import shared.Sizes 1.0

Item {
    id: root

    property var applicationModel
    property alias launcherY: launcher.y
    property alias launcherOpen: launcher.open
    property real homeBottomMargin
    property Item popupParent
    property Item virtualKeyboard
    property bool enableOpacityMask
    property bool devMode
    property bool showSystemAppsInLauncher

    readonly property real activeAppBottomMargin: {
        var margin = root.homeBottomMargin;
        if (widgetDrawer.open && widgetDrawer.visible)
            margin = Math.max(margin, activeApplicationSlot.height - widgetDrawer.y);
        if (root.virtualKeyboard.isOpen)
            margin = Math.max(margin, root.virtualKeyboard.y);
        return margin;
    }

    Item {
        id: mainContentArea
        anchors.left: parent.left
        anchors.right: parent.right
        height: root.height
        opacity: launcher.open ? 0 : 1
        Behavior on opacity { DefaultNumberAnimation {} }
        enabled: !launcher.open
        z: 0

        Item {
            y: launcher.height - Sizes.dp(Config.launcherHeight)
            width: parent.width
            height: parent.height

            HomePage {
                id: homePage

                anchors.left: parent.left
                anchors.right: parent.right

                y: launcher.y + Sizes.dp(Config.launcherHeight)
                height: parent.height - y - root.homeBottomMargin

                applicationModel: !root.applicationModel || root.applicationModel.populating ? null : root.applicationModel

                // widgets will reparent themselves to the active application slot when active
                activeApplicationParent: activeApplicationSlot
                moveBottomWidgetToDrawer: !widgetDrawer.showingHomePage
                widgetDrawer: widgetDrawerSlot
                popupParent: root.popupParent
                exposedRectTopMargin: launcher.y + Sizes.dp(Config.launcherHeight)
                exposedRectBottomMargin: root.activeAppBottomMargin
            }

            // slot for the maximized, active, application
            Item {
                id: activeApplicationSlot
                objectName: "activeApplicationSlot"
                anchors.fill: parent

                ApplicationFrame {
                    id: applicationFrame
                    anchors.fill: parent
                    appInfo: root.applicationModel && root.applicationModel.activeAppInfo
                             && !root.applicationModel.activeAppInfo.asWidget ? root.applicationModel.activeAppInfo
                                                                              : null
                    objectName: "currentInFrameApplication_" + (appInfo ?
                                                                  (appInfo.id ?
                                                                   appInfo.id : "no_id")
                                                              : "no_appInfo")
                    exposedRectTopMargin: launcher.y + Sizes.dp(Config.launcherHeight)
                    exposedRectBottomMargin: root.activeAppBottomMargin
                }
            }

            WidgetDrawer {
                id: widgetDrawer
                width: parent.width
                height: homePage.rowHeight
                anchors.bottom: homePage.bottom

                dragEnabled: !showingHomePage
                visible: !showingHomePage && !widgetDrawerSlot.empty

                Item {
                    id: widgetDrawerSlot
                    width: homePage.widgetWidth
                    height: homePage.rowHeight
                    anchors.horizontalCenter: widgetDrawer.horizontalCenter
                    readonly property bool empty: children.length === 0
                }

                property bool showingHomePage: !root.applicationModel || root.applicationModel.activeAppInfo === null
                onShowingHomePageChanged: {
                    if (showingHomePage) {
                        widgetDrawer.open = true;
                    }
                }
            }
        }
    }

    Rectangle {
        id: mainContentMask
        anchors.fill: mainContentArea
        gradient: Gradient {
            GradientStop { position: 0; color: Qt.rgba(1, 1, 1, 0.3) }
            GradientStop { position: 0.8; color: Qt.rgba(1, 1, 1, 0.3) }
            GradientStop { position: 0.95; color: Qt.rgba(1, 1, 1, 0) }
        }
        visible: false
    }

    OpacityMask {
        anchors.fill: mainContentArea
        source: mainContentArea
        maskSource: mainContentMask
        visible: enableOpacityMask
    }

    Launcher {
        id: launcher
        objectName: "launcher"
        anchors.left: parent.left
        anchors.right: parent.right
        backgroundHeight: root.height
        backgroundWidth: root.width
        applicationModel: root.applicationModel
        showDevApps: root.devMode
        showSystemApps: root.showSystemAppsInLauncher
        z: 1
    }
}