pragma Singleton

// Presentation mode: the screen stays on and notifications hold, as one
// switch.
//
// Both halves already exist -- Caffeine inhibits idle, Do Not Disturb quiets
// the toasts -- but a person plugging into a projector had to remember to arm
// both, every time, and the one they forgot was the one that fired a message
// preview onto the big screen. Same record-and-restore idiom as FocusSession:
// turning presentation off puts each half back exactly the way it was found,
// so a caffeine you had on for your own reasons survives the meeting.

import Quickshell
import QtQuick

Singleton {
    id: root

    property bool active: false
    property bool previousCaffeine: false
    property bool previousDnd: false

    function toggle(): void {
        if (root.active)
            root.stop();
        else
            root.start();
    }

    function start(): void {
        if (root.active)
            return;
        root.previousCaffeine = Caffeine.enabled;
        root.previousDnd = Notifs.doNotDisturb;
        Caffeine.enabled = true;
        Notifs.doNotDisturb = true;
        root.active = true;
    }

    function stop(): void {
        if (!root.active)
            return;
        Caffeine.enabled = root.previousCaffeine;
        Notifs.doNotDisturb = root.previousDnd;
        root.active = false;
    }
}