"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.DEFAULT_HOST = void 0;
const mqtt_1 = __importDefault(require("mqtt"));
const Device_1 = __importDefault(require("./Device"));
const events_1 = require("events");
const DisplayCategory_1 = require("./DisplayCategory");
exports.DEFAULT_HOST = "mqtt://Alex2MQTT.stormysdream.club:1883";
/**
 * The Alexa-to-MQTT bridge: one broker connection for a user's root topic, a set of registered devices, discovery and
 * directive dispatch.
 *
 * Events (all optional to listen to - since 1.5.1 a broker outage never throws out of the library):
 *   "connect"           connected (or reconnected) and subscribed to <root>/#
 *   "offline"           the connection dropped; mqtt.js reconnects on its own (reconnectPeriod, default 1 s)
 *   "reconnect"         a reconnect attempt starts
 *   "close"             the connection closed
 *   "error"   (err)     a connection or publish error. Emitted ONLY when a listener is attached (1.4.0 emitted it
 *                       unconditionally, and Node kills a process that has an unhandled "error" event)
 *   "discover" (n)      a discovery request was answered with n devices
 *   "directive" (info)  a directive was dispatched to a device: { endpointId, namespace, name }
 */
class Alex2MQTT extends events_1.EventEmitter {
    constructor(username, password, rootTopic, debugLogging = false, options = {}) {
        super(); // Initialize EventEmitter
        this.username = username;
        this.password = password;
        this.rootTopic = rootTopic;
        this.debugLogging = debugLogging;
        this.client = null;
        this.devices = [];
        /** true while the broker connection is up. */
        this.connected = false;
        /** ISO time of the last discovery request answered, null before the first. */
        this.lastDiscoveryAt = null;
        this.options = options || {};
        this.MqttHost = this.options.host || exports.DEFAULT_HOST;
    }
    log(message, detail) {
        if (this.options.log)
            this.options.log(message, detail);
        else if (this.debugLogging) {
            if (detail === undefined)
                console.log(`[Alex2Node.ts] ${message}`);
            else
                console.log(`[Alex2Node.ts] ${message}`, detail);
        }
    }
    /** Emit "error" only when somebody listens: an unhandled "error" event would crash the host process. */
    fail(err) {
        this.log("error: " + err.message);
        if (this.listenerCount("error") > 0)
            this.emit("error", err);
    }
    connect() {
        if (this.client)
            return;
        const options = Object.assign({ username: this.username, password: this.password, reconnectPeriod: 1000, connectTimeout: 10000 }, (this.options.mqtt || {}));
        this.client = mqtt_1.default.connect(this.MqttHost, options);
        this.client.on("connect", () => {
            this.connected = true;
            this.log("Connected to MQTT broker");
            this.client.subscribe(this.rootTopic + "/#", (err) => {
                if (err) {
                    this.fail(err);
                    return;
                }
                this.log("Subscribed to topics");
                this.emit("connect");
            });
        });
        this.client.on("offline", () => { this.connected = false; this.log("offline"); this.emit("offline"); });
        this.client.on("reconnect", () => { this.log("reconnecting"); this.emit("reconnect"); });
        this.client.on("close", () => { this.connected = false; this.emit("close"); });
        this.client.on("error", (err) => { this.connected = false; this.fail(err); });
        this.client.on("message", (topic, message) => {
            this.log(`MQTT Message Received`, { topic, payload: message.toString() });
            if (topic == `${this.rootTopic}/discover`) {
                this.log("Discovery request received, getting device json...");
                const deviceArray = this.devices.map((device) => device.getJSON());
                this.lastDiscoveryAt = new Date().toISOString();
                this.client.publish(topic + "_r", JSON.stringify(deviceArray), (err) => {
                    if (err) {
                        this.fail(err);
                        return;
                    }
                    this.log(`Discovery payloads published to ${topic + "_r"}`, deviceArray);
                    this.emit("discover", deviceArray.length);
                });
            }
            else if (topic.split("/").length == 3) {
                const [, endpointId, directiveType] = topic.split("/");
                if (directiveType != "alexaDirective") {
                    return;
                }
                const device = this.devices.find((d) => d.endpointId === endpointId);
                if (!device) {
                    this.log(`No device found for endpointId: ${endpointId}`);
                    return;
                }
                let payload;
                try {
                    payload = JSON.parse(message.toString());
                }
                catch (e) {
                    this.log(`Failed to parse payload JSON`, e);
                    return;
                }
                if (!payload || !payload.header)
                    return;
                this.emit("directive", { endpointId, namespace: payload.header.namespace, name: payload.header.name });
                if (payload.header.namespace === "Alexa" && payload.header.name === "ReportState") {
                    this.log(`ReportState directive for device ${endpointId}`);
                    device.emit("ReportState", payload);
                }
                else {
                    device.emit("Event", payload, payload.header.namespace);
                }
            }
        });
    }
    /** Close the broker connection (resolves once closed). The devices stay registered; connect() again reuses them. */
    disconnect() {
        return new Promise((resolve) => {
            const c = this.client;
            if (!c)
                return resolve();
            this.client = null;
            this.connected = false;
            c.end(true, {}, () => resolve());
        });
    }
    registerDevice(name, endpointId, displayCategory) {
        if (!this.client) {
            throw new Error("Must call connect before creating devices");
        }
        this.log(`Creating new device with endpoint: ${endpointId}`);
        const normalizedCategory = displayCategory === null
            ? [DisplayCategory_1.DisplayCategory.LIGHT]
            : Array.isArray(displayCategory)
                ? displayCategory
                : [displayCategory || DisplayCategory_1.DisplayCategory.LIGHT];
        const device = new Device_1.default(this.client, this.rootTopic, name, endpointId, normalizedCategory);
        this.devices.push(device);
        return device;
    }
    /** Forget a device (its listeners with it). Returns false when there was none. */
    unregisterDevice(endpointId) {
        const i = this.devices.findIndex((d) => d.endpointId === endpointId);
        if (i === -1)
            return false;
        this.devices[i].removeAllListeners();
        this.devices.splice(i, 1);
        return true;
    }
    /** Forget every device. */
    clearDevices() {
        for (const d of this.devices)
            d.removeAllListeners();
        this.devices = [];
    }
    getDevices() {
        return this.devices.slice();
    }
    getDevice(endpointId) {
        return this.devices.find((d) => d.endpointId === endpointId);
    }
    getRootTopic() {
        return this.rootTopic;
    }
    getHost() {
        return this.MqttHost;
    }
}
exports.default = Alex2MQTT;