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// Copyright (C) 2026 Danilo M. <danix@danix.xyz>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

pragma Singleton

import Quickshell
import Quickshell.Io
import QtQuick

// The notification daemon's state, read from the files it publishes under
// $XDG_RUNTIME_DIR/notifyd/. The files are the interface, the same convention
// the status registry set: the daemon writes them, this reads them, and
// notifyctl is the one path back for a mutation. Nothing here speaks D-Bus.
//
// A shell restart loses nothing: the daemon keeps running, the files stay, and
// this singleton reads them back.
Singleton {
    id: root

    readonly property string dir: (Quickshell.env("XDG_RUNTIME_DIR") || "/tmp") + "/notifyd"

    // Parsed whole on every change. Malformed or missing JSON is treated as
    // empty rather than propagated: a renderer with a bad array is worse than
    // a renderer that briefly shows nothing.
    property var queue: []
    property var history: []

    // Written by the drawer, read here so the balloons know to stand down.
    property bool drawerOpen: false

    // Epoch milliseconds; 0 means not snoozing.
    property double snoozeUntil: 0

    function parseQueue() {
        try { root.queue = JSON.parse(queueFile.text() || "[]"); }
        catch (e) { root.queue = []; }
    }

    function parseHistory() {
        try { root.history = JSON.parse(historyFile.text() || "[]"); }
        catch (e) { root.history = []; }
    }

    // Mutations go through notifyctl, the only thing that talks to the daemon.
    function run(args) {
        ctl.command = ["notifyctl"].concat(args);
        ctl.running = false;
        ctl.running = true;
    }
    function close(id) { root.run(["close", String(id)]); }
    function closeAll() { root.run(["close-all"]); }
    function action(id, key) { root.run(["action", String(id), key]); }
    function clearHistory() { root.run(["clear-history"]); }

    // The rofi picker lives in the notifications component; a caller passes
    // the notification id and its [key, label] pairs. Only that component
    // uses this, but the singleton owns the Process so there is one place a
    // notifyctl-adjacent command is built.
    function actions(id, pairs) {
        const cmd = ["notify-actions.sh", String(id)];
        for (const pair of pairs) {
            cmd.push(pair[1]);
            cmd.push(pair[0]);
        }
        actProc.command = cmd;
        actProc.running = false;
        actProc.running = true;
    }

    Process { id: ctl }
    Process { id: actProc }

    FileView {
        id: queueFile
        path: root.dir + "/queue.json"
        watchChanges: true
        printErrors: false
        onFileChanged: reload()
        onLoaded: root.parseQueue()
        onLoadFailed: root.queue = []
    }

    FileView {
        id: historyFile
        path: root.dir + "/history.json"
        watchChanges: true
        printErrors: false
        onFileChanged: reload()
        onLoaded: root.parseHistory()
        onLoadFailed: root.history = []
    }

    FileView {
        id: drawerFile
        path: root.dir + "/drawer"
        watchChanges: true
        printErrors: false
        onFileChanged: reload()
        onLoaded: root.drawerOpen = drawerFile.text().trim() === "1"
        onLoadFailed: root.drawerOpen = false
    }

    FileView {
        id: snoozeFile
        path: root.dir + "/snooze"
        watchChanges: true
        printErrors: false
        onFileChanged: reload()
        onLoaded: {
            const v = parseInt(snoozeFile.text().trim(), 10);
            root.snoozeUntil = isNaN(v) ? 0 : v * 1000;
        }
        onLoadFailed: root.snoozeUntil = 0
    }
}