import Quickshell
import Quickshell.Wayland
import QtQuick
import qs.config
import qs.components
import qs.services

// The session menu: the actions from Config.powerActions, one per row. Same
// full-screen layer surface as the launcher, so click-away and Escape work
// everywhere.
//
// Running them is left to PowerMenu, which owns the confirmation dialog — this
// surface is unmapped the moment something is picked.
PanelWindow {
    id: root

    required property var bar

    signal triggered(var action)

    readonly property string screenName: root.bar.screen ? root.bar.screen.name : ""

    visible: Session.isOpen("power", root.screenName)

    screen: root.bar.screen
    WlrLayershell.layer: WlrLayer.Overlay
    WlrLayershell.namespace: Config.namespace + "-power"
    WlrLayershell.keyboardFocus: WlrKeyboardFocus.Exclusive

    anchors {
        left: true
        right: true
        top: true
        bottom: true
    }
    exclusionMode: ExclusionMode.Ignore
    color: "transparent"

    readonly property var actions: Config.powerActions
    property int current: 0

    function activate(index: int): void {
        const action = root.actions[index];
        if (!action)
            return;

        Session.close();
        root.triggered(action);
    }

    onVisibleChanged: {
        if (root.visible) {
            // Never start on a destructive action: Enter on open should not be
            // able to shut the machine down.
            root.current = root.actions.findIndex(a => !a.dangerous);
            if (root.current < 0)
                root.current = 0;

            keyHandler.forceActiveFocus();
        }
    }

    // Click-away scrim.
    MouseArea {
        anchors.fill: parent
        onClicked: Session.close()
    }

    Item {
        id: keyHandler

        anchors.fill: parent
        focus: true

        Keys.onEscapePressed: Session.close()
        Keys.onDownPressed: root.current = Math.min(root.current + 1, root.actions.length - 1)
        Keys.onUpPressed: root.current = Math.max(root.current - 1, 0)
        Keys.onReturnPressed: root.activate(root.current)
        Keys.onEnterPressed: root.activate(root.current)
    }

    Rectangle {
        id: menu

        // Anchored to the panel's right edge, under the button that opens it.
        anchors {
            right: parent.right
            bottom: parent.bottom
            rightMargin: Theme.padding
            bottomMargin: Theme.barHeight + Theme.padding
        }

        width: Math.min(Config.powerMenuWidth, root.width - Theme.padding * 2)
        height: column.implicitHeight + Theme.padding * 2

        color: Theme.surface
        radius: Theme.radius * 2
        border.width: Theme.borderWidth
        border.color: Theme.border

        // Swallow clicks so they do not reach the scrim behind.
        MouseArea {
            anchors.fill: parent
        }

        Column {
            id: column

            anchors {
                left: parent.left
                right: parent.right
                verticalCenter: parent.verticalCenter
                margins: Theme.padding
            }
            spacing: 1

            Repeater {
                model: root.actions

                Rectangle {
                    id: row

                    required property var modelData
                    required property int index

                    readonly property bool destructive: row.modelData.dangerous
                    readonly property bool selected: root.current === row.index
                    readonly property color tint: row.destructive && row.selected ? Theme.danger : Theme.text

                    width: column.width
                    implicitHeight: 34
                    radius: Theme.radius
                    color: row.selected ? Theme.surfaceActive : "transparent"

                    Behavior on color {
                        ColorAnimation {
                            duration: Theme.animDuration
                            easing.type: Theme.animEasing
                        }
                    }

                    AppIcon {
                        id: icon

                        anchors {
                            left: parent.left
                            leftMargin: Theme.padding * 2
                            verticalCenter: parent.verticalCenter
                        }
                        icon: row.modelData.icon
                        fallbackGlyph: row.modelData.glyph
                        glyphColor: row.tint
                        size: 18
                    }

                    Text {
                        anchors {
                            left: icon.right
                            right: parent.right
                            leftMargin: Theme.padding * 2
                            rightMargin: Theme.padding * 2
                            verticalCenter: parent.verticalCenter
                        }
                        elide: Text.ElideRight
                        text: row.modelData.label
                        color: row.tint
                        font.family: Theme.fontFamily
                        font.pixelSize: Theme.fontSize
                    }

                    MouseArea {
                        anchors.fill: parent
                        hoverEnabled: true
                        cursorShape: Qt.PointingHandCursor
                        onEntered: root.current = row.index
                        onClicked: root.activate(row.index)
                    }
                }
            }
        }
    }
}