/*
    SPDX-FileCopyrightText: 2011 Viranch Mehta <viranch.mehta@gmail.com>
    SPDX-FileCopyrightText: 2013-2016 Kai Uwe Broulik <kde@privat.broulik.de>

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

import QtQuick
import QtQuick.Layouts

import org.kde.plasma.components as PlasmaComponents3
import org.kde.plasma.extras as PlasmaExtras
import org.kde.kirigami as Kirigami

PlasmaExtras.Representation {
    id: dialog

    property alias model: batteryRepeater.model
    property bool pluggedIn

    property int remainingTime

    property var profilesInstalled
    property string activeProfile
    property var profiles

    // List of active power management inhibitions (applications that are
    // blocking sleep and screen locking).
    //
    // type: [{
    //  Icon: string,
    //  Name: string,
    //  Reason: string,
    // }]
    property var inhibitions: []
    property bool manuallyInhibited
    property bool inhibitsLidAction

    property string inhibitionReason
    property string degradationReason
    // type: [{ Name: string, Icon: string, Profile: string, Reason: string }]
    required property var profileHolds

    signal powerManagementChanged(bool disabled)
    signal inhibitionChangeRequested(bool inhibit)
    signal activateProfileRequested(string profile)

    collapseMarginsHint: true

    KeyNavigation.down: pmSwitch.pmCheckBox

    //footer:

    contentItem: PlasmaComponents3.ScrollView {
        id: scrollView

        focus: false

        PlasmaComponents3.ScrollBar.horizontal.policy: PlasmaComponents3.ScrollBar.AlwaysOff
        function positionViewAtItem(item) {
            if (!PlasmaComponents3.ScrollBar.vertical.visible) {
                return;
            }
            const rect = batteryList.mapFromItem(item, 0, 0, item.width, item.height);
            if (rect.y < scrollView.contentItem.contentY) {
                scrollView.contentItem.contentY = rect.y;
            } else if (rect.y + rect.height > scrollView.contentItem.contentY + scrollView.height) {
                scrollView.contentItem.contentY = rect.y + rect.height - scrollView.height;
            }
        }

        Column {
            id: batteryList

            spacing: Kirigami.Units.smallSpacing

            readonly property Item firstHeaderItem: {
                if (powerProfileItem.visible) {
                    return powerProfileItem;
                }
                return null;
            }
            readonly property Item lastHeaderItem: {
                if (powerProfileItem.visible) {
                    return powerProfileItem;
                }
                return null;
            }

            Repeater {
                id: batteryRepeater

                delegate: BatteryItem {
                    width: scrollView.availableWidth

                    battery: model
                    remainingTime: dialog.remainingTime
                    batteryIndex: index

                    KeyNavigation.up: index === 0 ? batteryList.lastHeaderItem : batteryRepeater.itemAt(index - 1)
                    KeyNavigation.down: index + 1 < batteryRepeater.count ? batteryRepeater.itemAt(index + 1) : null
                    KeyNavigation.backtab: KeyNavigation.up
                    KeyNavigation.tab: KeyNavigation.down

                    Keys.onTabPressed: event => {
                        if (index === batteryRepeater.count - 1) {
                            // Workaround to leave applet's focus on desktop
                            nextItemInFocusChain(false).forceActiveFocus(Qt.TabFocusReason);
                        } else {
                            event.accepted = false;
                        }
                    }

                    onActiveFocusChanged: if (activeFocus) scrollView.positionViewAtItem(this)
                }
            }
            Separator {
                width: scrollView.availableWidth
                visible: model.count !== 0
            }
            PowerProfileItem {
                id: powerProfileItem

                width: scrollView.availableWidth

                KeyNavigation.down: batteryRepeater.count > 0 ? batteryRepeater.itemAt(0) : null
                KeyNavigation.backtab: KeyNavigation.up
                KeyNavigation.tab: KeyNavigation.down

                profilesInstalled: dialog.profilesInstalled
                profilesAvailable: dialog.profiles.length > 0
                activeProfile: dialog.activeProfile
                inhibitionReason: dialog.inhibitionReason
                degradationReason: dialog.degradationReason
                profileHolds: dialog.profileHolds

                onActivateProfileRequested: profile => {
                    dialog.activateProfileRequested(profile);
                }

                onActiveFocusChanged: if (activeFocus) scrollView.positionViewAtItem(this)
            }

            PowerManagementItem {
                id: pmSwitch
                width: scrollView.availableWidth
                inhibitions: dialog.inhibitions
                manuallyInhibited: dialog.manuallyInhibited
                inhibitsLidAction: dialog.inhibitsLidAction
                pluggedIn: dialog.pluggedIn

                onInhibitionChangeRequested: inhibit => {
                    dialog.inhibitionChangeRequested(inhibit);
                }

                onDisabledChanged: dialog.powerManagementChanged(disabled)
            }
            InhibitionHint {
                width: scrollView.availableWidth
                visible: batterymonitor.isBroken && typeof batterymonitor.batteryCapacity !== "undefined"
                iconSource: "info"
                leftPadding: Kirigami.Units.iconSizes.small
                text: "There is a problem with your battery, so your computer might shut down suddenly."
            }
        }
    }
}