/*
 *  SPDX-FileCopyrightText: 2019 Marco Martin <mart@kde.org>
 *  SPDX-FileCopyrightText: 2021 Devin Lin <devin@kde.org>
 *
 *   SPDX-License-Identifier: LGPL-2.0-or-later
 */

import QtQuick 2.12
import QtQuick.Window 2.12
import QtQuick.Layouts 1.1

import org.kde.plasma.plasmoid 2.0
import org.kde.plasma.core 2.0 as PlasmaCore
import org.kde.plasma.components 3.0 as PlasmaComponents
import org.kde.draganddrop 2.0 as DragDrop

import "private" as Private
import "appdrawer"

import org.kde.plasma.private.containmentlayoutmanager 1.0 as ContainmentLayoutManager 

import org.kde.plasma.private.mobileshell 1.0 as MobileShell

import org.kde.plasma.private.mobilehomescreencomponents 0.1 as HomeScreenComponents

Item {
    id: root
    
    property bool interactive: true
    
    property var homeScreenState: HomeScreenState {
        totalPagesWidth: pages.contentWidth
        
        appDrawerFlickable: appDrawer.flickable
        
        availableScreenHeight: height - (MobileShell.TaskPanelControls.isPortrait ? MobileShell.TaskPanelControls.panelHeight : 0)
        availableScreenWidth: width - (MobileShell.TaskPanelControls.isPortrait ? 0 : MobileShell.TaskPanelControls.panelWidth)
        
        appDrawerBottomOffset: favoriteStrip.height
    }
    
    property alias appDrawer: appDrawerLoader.item
    property alias homeScreenContents: contents
    
    Component.onCompleted: {
        // ensure that homescreen is on first page
        homeScreenState.goToPageIndex(0);
        homeScreenState.resetSwipeState();
    }
    
    // the parent of the homescreen is a flickable that captures all flicks
    FlickContainer {
        id: flickContainer
        anchors.fill: parent
        
        homeScreenState: root.homeScreenState
        
        // disable flick tracking when necessary
        interactive: root.interactive && homeScreenState.currentView !== HomeScreenState.AppDrawerView
        
        // item is effectively anchored to root, while allowing flickContainer
        // to keep track of flicks
        Item {
            x: flickContainer.contentX
            y: flickContainer.contentY
            width: flickContainer.width
            height: flickContainer.height
            
            // horizontal pages
            HomeScreenPages {
                id: pages
                homeScreenState: root.homeScreenState

                // account for panels
                anchors.fill: parent
                anchors.topMargin: MobileShell.TopPanelControls.panelHeight
                anchors.rightMargin: MobileShell.TaskPanelControls.isPortrait ? 0 : MobileShell.TaskPanelControls.panelWidth
                anchors.bottomMargin: MobileShell.TaskPanelControls.isPortrait ? MobileShell.TaskPanelControls.panelHeight : 0
                
                // animation when app drawer is being shown
                opacity: root.appDrawer ? 1 - root.appDrawer.openFactor : 1
                transform: Translate {
                    y: root.appDrawer ? (-pages.height / 20) * root.appDrawer.openFactor : 0
                }

                contentWidth: Math.max(width, width * Math.ceil(contents.itemsBoundingRect.width/width)) + (contents.launcherDragManager.active ? width : 0)
                showAddPageIndicator: contents.launcherDragManager.active

                HomeScreenContents {
                    id: contents
                    homeScreenState: root.homeScreenState
                    
                    height: pages.height
                    width: pages.width * 100
                    
                    favoriteStrip: favoriteStrip
                    homeScreenPages: pages
                }
                
                footer: FavoriteStrip {
                    id: favoriteStrip

                    appletsLayout: contents.appletsLayout
                    visible: favoriteStrip.flow.children.length > 0 || contents.launcherDragManager.active || contents.containsDrag
                    opacity: contents.launcherDragManager.active && HomeScreenComponents.ApplicationListModel.favoriteCount >= HomeScreenComponents.ApplicationListModel.maxFavoriteCount ? 0.3 : 1

                    TapHandler {
                        target: favoriteStrip
                        onTapped: {
                            //Hides icons close button
                            contents.appletsLayout.appletsLayoutInteracted();
                            contents.appletsLayout.editMode = false;
                        }
                        onLongPressed: {
                             if (homeScreenState.currentSwipeState === HomeScreenState.DeterminingType) {
                                // only go into edit mode when not in a swipe
                                contents.appletsLayout.editMode = true;
                             }
                        }
                        onPressedChanged: root.parent.focus = true;
                    }
                }
            }
            
            // app drawer
            AppDrawerLoader {
                id: appDrawerLoader
                anchors.fill: parent
                homeScreenState: root.homeScreenState
                
                // account for panels
                topPadding: MobileShell.TopPanelControls.panelHeight
                rightPadding: MobileShell.TaskPanelControls.isPortrait ? 0 : MobileShell.TaskPanelControls.panelWidth
                bottomPadding: MobileShell.TaskPanelControls.isPortrait ? MobileShell.TaskPanelControls.panelHeight : 0
            }
        }
    }
}