// SPDX-FileCopyrightText: 2021-2023 Devin Lin <devin@kde.org>
// SPDX-License-Identifier: GPL-2.0-or-later

import QtQuick
import QtQuick.Layouts
import QtQuick.Window

import org.kde.plasma.plasmoid
import org.kde.plasma.workspace.keyboardlayout as Keyboards

import org.kde.plasma.private.mobileshell as MobileShell
import org.kde.plasma.private.mobileshell.state as MobileShellState
import org.kde.taskmanager as TaskManager
import org.kde.plasma.private.mobileshell.windowplugin as WindowPlugin

MobileShell.NavigationPanel {
    id: root
    required property bool opaqueBar
    
    // background is:
    // - opaque if an app is shown or vkbd is shown
    // - translucent if the task switcher is open
    // - transparent if on the homescreen
    backgroundColor: (Keyboards.KWinVirtualKeyboard.visible || opaqueBar) ? Kirigami.Theme.backgroundColor : "transparent";
    foregroundColorGroup: opaqueBar ? Kirigami.Theme.Window : Kirigami.Theme.ComplementaryColorGroup
    shadow: !opaqueBar
        
    TaskManager.VirtualDesktopInfo {
        id: virtualDesktopInfo
    }

    TaskManager.ActivityInfo {
        id: activityInfo
    }

    TaskManager.TasksModel {
        id: tasksModel
        filterByVirtualDesktop: true
        filterByActivity: true
        filterNotMaximized: true
        filterByScreen: true
        filterHidden: true

        virtualDesktop: virtualDesktopInfo.currentDesktop
        activity: activityInfo.currentActivity

        groupMode: TaskManager.TasksModel.GroupDisabled
    }

    // ~~~~
    // navigation panel actions
    
    // toggle task switcher button
    leftAction: MobileShell.NavigationPanelAction {
        id: taskSwitcherAction
        
        enabled: true
        iconSource: "mobile-task-switcher"
        iconSizeFactor: 0.75
        
        onTriggered: {
            Plasmoid.triggerTaskSwitcher();
        }
    }
    
    // home button
    middleAction: MobileShell.NavigationPanelAction {
        id: homeAction
        
        enabled: true
        iconSource: "start-here-kde"
        iconSizeFactor: 1
        
        onTriggered: {
            MobileShellState.ShellDBusClient.openHomeScreen();
        }
    }
    
    // close app/keyboard button
    rightAction: MobileShell.NavigationPanelAction {
        id: closeAppAction
        
        enabled: Keyboards.KWinVirtualKeyboard.visible || WindowPlugin.WindowUtil.hasCloseableActiveWindow
        iconSource: Keyboards.KWinVirtualKeyboard.visible ? "go-down-symbolic" : "mobile-close-app"
        // mobile-close-app (from plasma-frameworks) seems to have less margins than icons from breeze-icons
        iconSizeFactor: Keyboards.KWinVirtualKeyboard.visible ? 1 : 0.75
        
        onTriggered: {
            if (Keyboards.KWinVirtualKeyboard.active) {
                // close keyboard if it is open
                Keyboards.KWinVirtualKeyboard.active = false;
            } else if (WindowPlugin.WindowUtil.hasCloseableActiveWindow) {
                // if task switcher is closed, but there is an active window
                if (tasksModel.activeTask !== 0) {
                    tasksModel.requestClose(tasksModel.activeTask);
                }
                MobileShellState.ShellDBusClient.closeAppLaunchAnimation();
            }
        }
    }
    
    rightCornerAction: MobileShell.NavigationPanelAction {
        id: keyboardToggleAction
        visible: Keyboards.KWinVirtualKeyboard.available && !Keyboards.KWinVirtualKeyboard.activeClientSupportsTextInput
        enabled: true
        iconSource: "input-keyboard-virtual-symbolic"
        iconSizeFactor: 0.75
        
        onTriggered: {
            if (Keyboards.KWinVirtualKeyboard.visible) {
                Keyboards.KWinVirtualKeyboard.active = false;
            } else {
                Keyboards.KWinVirtualKeyboard.forceActivate();
            }
        }
    }
}