import QtQuick
import Quickshell.Io
import "." as M

M.BarLabel {
    id: root

    label: root._title
    color: M.Theme.base05
    tooltip: root._appId ? root._appId + "\n" + root._title : root._title
    elide: Text.ElideRight

    property string _title: ""
    property string _appId: ""

    // Initial state — niri event-stream doesn't replay current focus
    Process {
        id: initProc
        running: true
        command: ["niri", "msg", "--json", "focused-window"]
        stdout: StdioCollector {
            onStreamFinished: {
                try {
                    const w = JSON.parse(text);
                    if (w) {
                        root._title = w.title || "";
                        root._appId = w.app_id || "";
                    }
                } catch (e) {}
            }
        }
    }

    // Live updates via event stream
    Process {
        id: eventStream
        running: true
        command: ["niri", "msg", "--json", "event-stream"]
        stdout: SplitParser {
            splitMarker: "\n"
            onRead: line => {
                try {
                    const ev = JSON.parse(line);
                    if (ev.WindowFocusChanged !== undefined) {
                        const w = ev.WindowFocusChanged.window;
                        root._title = w ? (w.title || "") : "";
                        root._appId = w ? (w.app_id || "") : "";
                    } else if (ev.WindowOpenedOrChanged !== undefined) {
                        const w = ev.WindowOpenedOrChanged.window;
                        if (w.is_focused) {
                            root._title = w.title || "";
                            root._appId = w.app_id || "";
                        }
                    }
                } catch (e) {}
            }
        }
    }
}