"use strict";
var __extends = (this && this.__extends) || (function () {
    var extendStatics = Object.setPrototypeOf ||
        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
var __assign = (this && this.__assign) || Object.assign || function(t) {
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        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
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    }
    return t;
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    return new (P || (P = Promise))(function (resolve, reject) {
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        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
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};
var __rest = (this && this.__rest) || function (s, e) {
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        t[p] = s[p];
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            t[p[i]] = s[p[i]];
    return t;
};
Object.defineProperty(exports, "__esModule", { value: true });
/*
 * Copyright 2017-2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance with
 * the License. A copy of the License is located at
 *
 *     http://aws.amazon.com/apache2.0/
 *
 * or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
 * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions
 * and limitations under the License.
 */
var Paho = require("../vendor/paho-mqtt");
var uuid_1 = require("uuid");
var Observable = require("zen-observable");
var PubSubProvider_1 = require("./PubSubProvider");
var core_1 = require("@aws-amplify/core");
var logger = new core_1.ConsoleLogger('MqttOverWSProvider');
var ClientsQueue = /** @class */ (function () {
    function ClientsQueue() {
        this.promises = new Map();
    }
    ClientsQueue.prototype.get = function (clientId, clientFactory) {
        return __awaiter(this, void 0, void 0, function () {
            var promise;
            return __generator(this, function (_a) {
                promise = this.promises.get(clientId);
                if (promise) {
                    return [2 /*return*/, promise];
                }
                promise = clientFactory(clientId);
                this.promises.set(clientId, promise);
                return [2 /*return*/, promise];
            });
        });
    };
    Object.defineProperty(ClientsQueue.prototype, "allClients", {
        get: function () { return Array.from(this.promises.keys()); },
        enumerable: true,
        configurable: true
    });
    ClientsQueue.prototype.remove = function (clientId) {
        this.promises.delete(clientId);
    };
    return ClientsQueue;
}());
var topicSymbol = typeof Symbol !== 'undefined' ? Symbol('topic') : '@@topic';
var MqttOverWSProvider = /** @class */ (function (_super) {
    __extends(MqttOverWSProvider, _super);
    function MqttOverWSProvider(options) {
        if (options === void 0) { options = {}; }
        var _this = _super.call(this, __assign({}, options, { clientId: options.clientId || uuid_1.v4() })) || this;
        _this._clientsQueue = new ClientsQueue();
        _this._topicObservers = new Map();
        return _this;
    }
    Object.defineProperty(MqttOverWSProvider.prototype, "clientId", {
        get: function () { return this.options.clientId; },
        enumerable: true,
        configurable: true
    });
    Object.defineProperty(MqttOverWSProvider.prototype, "endpoint", {
        get: function () { return this.options.aws_pubsub_endpoint; },
        enumerable: true,
        configurable: true
    });
    Object.defineProperty(MqttOverWSProvider.prototype, "clientsQueue", {
        get: function () { return this._clientsQueue; },
        enumerable: true,
        configurable: true
    });
    MqttOverWSProvider.prototype.getTopicForValue = function (value) { return typeof value === 'object' && value[topicSymbol]; };
    MqttOverWSProvider.prototype.getProviderName = function () { return 'MqttOverWSProvider'; };
    MqttOverWSProvider.prototype.onDisconnect = function (_a) {
        var clientId = _a.clientId, errorCode = _a.errorCode, args = __rest(_a, ["clientId", "errorCode"]);
        if (errorCode !== 0) {
            logger.warn(clientId, JSON.stringify(__assign({ errorCode: errorCode }, args), null, 2));
        }
    };
    MqttOverWSProvider.prototype.newClient = function (_a) {
        var url = _a.url, clientId = _a.clientId;
        return __awaiter(this, void 0, void 0, function () {
            var client;
            var _this = this;
            return __generator(this, function (_b) {
                switch (_b.label) {
                    case 0:
                        logger.debug('Creating new MQTT client', clientId);
                        client = new Paho.Client(url, clientId);
                        // client.trace = (args) => logger.debug(clientId, JSON.stringify(args, null, 2));
                        client.onMessageArrived = function (_a) {
                            var topic = _a.destinationName, msg = _a.payloadString;
                            _this._onMessage(topic, msg);
                        };
                        client.onConnectionLost = function (_a) {
                            var errorCode = _a.errorCode, args = __rest(_a, ["errorCode"]);
                            _this.onDisconnect(__assign({ clientId: clientId, errorCode: errorCode }, args));
                        };
                        return [4 /*yield*/, new Promise(function (resolve, reject) {
                                client.connect({
                                    useSSL: true,
                                    mqttVersion: 3,
                                    onSuccess: function () { return resolve(client); },
                                    onFailure: reject,
                                });
                            })];
                    case 1:
                        _b.sent();
                        return [2 /*return*/, client];
                }
            });
        });
    };
    MqttOverWSProvider.prototype.connect = function (clientId, options) {
        if (options === void 0) { options = {}; }
        return __awaiter(this, void 0, void 0, function () {
            var _this = this;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0: return [4 /*yield*/, this.clientsQueue.get(clientId, function (clientId) { return _this.newClient(__assign({}, options, { clientId: clientId })); })];
                    case 1: return [2 /*return*/, _a.sent()];
                }
            });
        });
    };
    MqttOverWSProvider.prototype.disconnect = function (clientId) {
        return __awaiter(this, void 0, void 0, function () {
            var client;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0: return [4 /*yield*/, this.clientsQueue.get(clientId, function () { return null; })];
                    case 1:
                        client = _a.sent();
                        if (client && client.isConnected()) {
                            client.disconnect();
                        }
                        this.clientsQueue.remove(clientId);
                        return [2 /*return*/];
                }
            });
        });
    };
    MqttOverWSProvider.prototype.publish = function (topics, msg) {
        return __awaiter(this, void 0, void 0, function () {
            var targetTopics, message, url, client;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        targetTopics = [].concat(topics);
                        message = JSON.stringify(msg);
                        return [4 /*yield*/, this.endpoint];
                    case 1:
                        url = _a.sent();
                        return [4 /*yield*/, this.connect(this.clientId, { url: url })];
                    case 2:
                        client = _a.sent();
                        logger.debug('Publishing to topic(s)', targetTopics.join(','), message);
                        targetTopics.forEach(function (topic) { return client.send(topic, message); });
                        return [2 /*return*/];
                }
            });
        });
    };
    MqttOverWSProvider.prototype._onMessage = function (topic, msg) {
        try {
            var observersForTopic = this._topicObservers.get(topic) || new Set();
            var parsedMessage_1 = JSON.parse(msg);
            if (typeof parsedMessage_1 === 'object') {
                parsedMessage_1[topicSymbol] = topic;
            }
            observersForTopic.forEach(function (observer) { return observer.next(parsedMessage_1); });
        }
        catch (error) {
            logger.warn('Error handling message', error, msg);
        }
    };
    MqttOverWSProvider.prototype.subscribe = function (topics, options) {
        var _this = this;
        if (options === void 0) { options = {}; }
        var targetTopics = [].concat(topics);
        logger.debug('Subscribing to topic(s)', targetTopics.join(','));
        return new Observable(function (observer) {
            targetTopics.forEach(function (topic) {
                var observersForTopic = _this._topicObservers.get(topic);
                if (!observersForTopic) {
                    observersForTopic = new Set();
                    _this._topicObservers.set(topic, observersForTopic);
                }
                observersForTopic.add(observer);
            });
            var client;
            var _a = options.clientId, clientId = _a === void 0 ? _this.clientId : _a;
            (function () { return __awaiter(_this, void 0, void 0, function () {
                var _a, url, _b;
                return __generator(this, function (_c) {
                    switch (_c.label) {
                        case 0:
                            _a = options.url;
                            if (!(_a === void 0)) return [3 /*break*/, 2];
                            return [4 /*yield*/, this.endpoint];
                        case 1:
                            _b = _c.sent();
                            return [3 /*break*/, 3];
                        case 2:
                            _b = _a;
                            _c.label = 3;
                        case 3:
                            url = _b;
                            return [4 /*yield*/, this.connect(clientId, { url: url })];
                        case 4:
                            client = _c.sent();
                            targetTopics.forEach(function (topic) { client.subscribe(topic); });
                            return [2 /*return*/];
                    }
                });
            }); })();
            return function () {
                logger.debug('Unsubscribing from topic(s)', targetTopics.join(','));
                if (client) {
                    targetTopics.forEach(function (topic) {
                        if (client.isConnected()) {
                            client.unsubscribe(topic);
                        }
                        var observersForTopic = _this._topicObservers.get(topic) ||
                            new Set();
                        observersForTopic.forEach(function (observer) { return observer.complete(); });
                        observersForTopic.clear();
                    });
                    _this.disconnect(clientId);
                }
                return null;
            };
        });
    };
    return MqttOverWSProvider;
}(PubSubProvider_1.AbstractPubSubProvider));
exports.MqttOverWSProvider = MqttOverWSProvider;
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