{
  lib,
  stdenv,
  writeShellScriptBin,
  fetchurl,
  curl,
  python3,
  mpv,
  libnotify,
  busybox,
}: let
  icon = fetchurl {
    url = "https://s3.m3tam3re.com/public/chiron.jpeg";
    hash = "sha256-LIIR3aqJ5ePsZuvVQxJ70c6yd+L85fLE5uY/fLE5Ypo=";
  };
  script = writeShellScriptBin "talk" ''
    #!/usr/bin/env bash
    set -euo pipefail

    # ── Toggle: VOICE_NOTIFY=0 deaktiviert alles ───────────────────
    if [ "''${VOICE_NOTIFY:-1}" = "0" ]; then
      exit 0
    fi

    # ── Config ──────────────────────────────────────────────────────
    API_KEY="''${ELEVENLABS_API_KEY:?Set ELEVENLABS_API_KEY in your environment}"
    VOICE_ID="''${ELEVENLABS_VOICE_ID:-KXxZd16DiBqt82nbarJx}"
    # Argument hat Vorrang, sonst stdin lesen wenn Pipe
    if [ $# -ge 1 ]; then
      TEXT="$1"
    elif [ ! -t 0 ]; then
      TEXT=$(cat)
    else
      echo "Usage: talk \"Text\"  oder  echo Text | talk" >&2
      exit 1
    fi
    AUDIO_FILE="/tmp/voice-notify-$$.mp3"
    ACTION_FILE="/tmp/voice-action-$$"

    CURL="${lib.getExe curl}"
    PYTHON="${lib.getExe python3}"
    MPV="${lib.getExe mpv}"
    NOTIFY="${lib.getExe libnotify}"
    RM="${busybox}/bin/rm"
    CAT="${busybox}/bin/cat"
    GREP="${busybox}/bin/grep"
    SLEEP="${busybox}/bin/sleep"
    KILL="${busybox}/bin/kill"
    STAT="${busybox}/bin/stat"

    trap '$RM -f "$AUDIO_FILE" "$ACTION_FILE"' EXIT

    # ── TTS generieren ──────────────────────────────────────────────
    PAYLOAD=$("$PYTHON" -c '
    import json, sys
    print(json.dumps({
        "text": sys.argv[1],
        "model_id": "eleven_multilingual_v2",
        "voice_settings": {"stability": 0.5, "similarity_boost": 0.75}
    }))
    ' "$TEXT")

    HTTP_CODE=$("$CURL" -s -o "$AUDIO_FILE" -w "%{http_code}" \
      -X POST "https://api.elevenlabs.io/v1/text-to-speech/''${VOICE_ID}" \
      -H "xi-api-key: ''${API_KEY}" \
      -H "Content-Type: application/json" \
      -d "$PAYLOAD") || HTTP_CODE="000"

    if [ "$HTTP_CODE" != "200" ]; then
      ERR=$($CAT "$AUDIO_FILE" 2>/dev/null | head -c 300)
      $RM -f "$AUDIO_FILE"
      "$NOTIFY" -u critical "❌ Voice Fehler" "HTTP ''${HTTP_CODE}\n''${ERR}"
      exit 1
    fi

    # ── Gleichzeitig: Audio + Notification ──────────────────────────
    "$MPV" --no-video --no-terminal --really-quiet "$AUDIO_FILE" &
    MPV_PID=$!

    (
      exec "$NOTIFY" \
        --action=cancel="⛔ Abbrechen" \
        --urgency=normal \
        --icon=${icon} \
        "🔊 KI Antwort" \
        "$TEXT" > "$ACTION_FILE" 2>/dev/null
    ) &
    NOTIFY_PID=$!

    # ── Poll-Loop ───────────────────────────────────────────────────
    while true; do
      if ! $KILL -0 "$MPV_PID" 2>/dev/null; then
        $KILL "$NOTIFY_PID" 2>/dev/null || true
        break
      fi
      if [ -s "$ACTION_FILE" ]; then
        if $GREP -q "cancel" "$ACTION_FILE" 2>/dev/null; then
          $KILL "$MPV_PID" 2>/dev/null || true
        fi
        break
      fi
      $SLEEP 0.2
    done

    wait "$MPV_PID" 2>/dev/null || true
  '';
in
  stdenv.mkDerivation {
    pname = "talk";
    version = "0.1.0";

    dontUnpack = true;

    installPhase = ''
      mkdir -p "$out/bin"
      ln -s ${script}/bin/talk "$out/bin/talk"
    '';

    meta = with lib; {
      description = "ElevenLabs TTS voice notifications with dismissable popup";
      homepage = "https://code.m3ta.dev/m3tam3re/nixpkgs";
      license = licenses.mit;
      platforms = platforms.linux;
      mainProgram = "talk";
    };
  }