// A scene: Alexa.SceneController. A scene is an endpoint that is not a device. It reports no state, and Activate
// and Deactivate are answered with ActivationStarted and DeactivationStarted, which ctx.respond() sends.
//
//   ALEX2MQTT_USERNAME=... ALEX2MQTT_PASSWORD=... ALEX2MQTT_ROOT_TOPIC=... node examples/scene.js
//
// "alex2node" is the installed package; inside this checkout it resolves to the built dist/.
const { Alex2MQTT, SceneController } = require("alex2node");

const missing = ["ALEX2MQTT_USERNAME", "ALEX2MQTT_PASSWORD", "ALEX2MQTT_ROOT_TOPIC"].filter((name) => !process.env[name]);
if (missing.length > 0) {
  console.error(`${missing.join(", ")} not set. Set the MQTT user name, the password and the root topic of your Alex2MQTT account.`);
  process.exit(1);
}
const { ALEX2MQTT_USERNAME, ALEX2MQTT_PASSWORD, ALEX2MQTT_ROOT_TOPIC } = process.env;

const bridge = new Alex2MQTT(ALEX2MQTT_USERNAME, ALEX2MQTT_PASSWORD, ALEX2MQTT_ROOT_TOPIC);
bridge.on("connect", () => console.log("connected, discover the devices in the Alexa app"));
bridge.on("error", (err) => console.error("bridge:", err.message));

// What the scene sets. Replace it with your devices.
const room = { lights: "bright", blind: "open" };

// Alexa wants the word "scene" in the description, and the category SCENE_TRIGGER or ACTIVITY_TRIGGER
const device = bridge.addDevice({
  endpointId: "movie-night", name: "Movie Night", categories: ["SCENE_TRIGGER"],
  description: "Movie night scene by Alex2Node",
});
const scene = device.add(SceneController, { supportsDeactivation: true });

scene.on("Activate", (ctx) => {
  Object.assign(room, { lights: "dim", blind: "closed" });
  console.log("movie night on", room);
  return ctx.respond();
});
scene.on("Deactivate", (ctx) => {
  Object.assign(room, { lights: "bright", blind: "open" });
  console.log("movie night off", room);
  return ctx.respond();
});

bridge.connect();