// 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.

import Quickshell
import Quickshell.Io
import QtQuick
import "../.."

// Every shell in the repo, running or not, with a restart through reload.sh,
// wrapped by restart.sh, which notifies once the shells are back. Started
// detached, so it outlives the qs that started it:
// restarting the desktop shell from its own settings window works, the
// window just closes until the new process is up.
Module {
    id: sm
    name: "shells"
    label: "Shells"
    // nf-fa-refresh, present in Inconsolata Nerd Font.
    icon: ""
    settings: true
    group: "Desktop"
    keywords: ["restart", "reload", "quickshell", "qs", "process", "start"]

    readonly property string root: Quickshell.shellDir + "/.."
    // [{name, running}], one per directory holding a shell.qml.
    property var shells: []

    // An empty name restarts every shell the page lists.
    function restart(name) {
        Quickshell.execDetached(["sh", Quickshell.shellDir + "/modules/shells/restart.sh", sm.root]
            .concat(name ? [name] : sm.shells.map(s => s.name)));
        repoll.restart();
    }

    function refresh() {
        proc.rows = [];
        proc.running = false;
        proc.running = true;
    }

    // reload.sh waits a second before it returns; read the list after that.
    property Timer repoll: Timer {
        interval: 2000
        onTriggered: sm.refresh()
    }

    // A shell is running when qs lists an instance on its config path.
    property Process proc: Process {
        property var rows: []
        command: ["sh", "-c", 'cd "$1" || exit 1; up=$(qs list --all 2>/dev/null); '
            + 'for f in */shell.qml; do case "$up" in '
            + '*"Config path: $PWD/$f"*) s=running ;; *) s=stopped ;; esac; '
            + 'printf "%s\\t%s\\n" "${f%/shell.qml}" "$s"; done', "sh", sm.root]
        stdout: SplitParser {
            onRead: line => {
                const f = line.split("\t");
                if (f.length === 2) proc.rows.push({ name: f[0], running: f[1] === "running" });
            }
        }
        onExited: {
            sm.shells = proc.rows;
            sm.searchItems = proc.rows.map(s => ({ text: s.name, key: "shell:" + s.name }));
        }
    }

    page: Component {
        Page {
            title: "Shells"
            ShellsPage { width: parent.width; shells: sm }
        }
    }
}