// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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        s = arguments[i];
        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
            t[p] = s[p];
    }
    return t;
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
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    function step(op) {
        if (f) throw new TypeError("Generator is already executing.");
        while (_) try {
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            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
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        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
import { LogLevel } from "./ILogger";
import { TransferFormat } from "./ITransport";
import { Arg, getDataDetail, getUserAgentHeader, Platform, sendMessage } from "./Utils";
/** @private */
var ServerSentEventsTransport = /** @class */ (function () {
    function ServerSentEventsTransport(httpClient, accessTokenFactory, logger, logMessageContent, eventSourceConstructor, withCredentials, headers) {
        this.httpClient = httpClient;
        this.accessTokenFactory = accessTokenFactory;
        this.logger = logger;
        this.logMessageContent = logMessageContent;
        this.withCredentials = withCredentials;
        this.eventSourceConstructor = eventSourceConstructor;
        this.headers = headers;
        this.onreceive = null;
        this.onclose = null;
    }
    ServerSentEventsTransport.prototype.connect = function (url, transferFormat) {
        return __awaiter(this, void 0, void 0, function () {
            var token;
            var _this = this;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        Arg.isRequired(url, "url");
                        Arg.isRequired(transferFormat, "transferFormat");
                        Arg.isIn(transferFormat, TransferFormat, "transferFormat");
                        this.logger.log(LogLevel.Trace, "(SSE transport) Connecting.");
                        // set url before accessTokenFactory because this.url is only for send and we set the auth header instead of the query string for send
                        this.url = url;
                        if (!this.accessTokenFactory) return [3 /*break*/, 2];
                        return [4 /*yield*/, this.accessTokenFactory()];
                    case 1:
                        token = _a.sent();
                        if (token) {
                            url += (url.indexOf("?") < 0 ? "?" : "&") + ("access_token=" + encodeURIComponent(token));
                        }
                        _a.label = 2;
                    case 2: return [2 /*return*/, new Promise(function (resolve, reject) {
                            var opened = false;
                            if (transferFormat !== TransferFormat.Text) {
                                reject(new Error("The Server-Sent Events transport only supports the 'Text' transfer format"));
                                return;
                            }
                            var eventSource;
                            if (Platform.isBrowser || Platform.isWebWorker) {
                                eventSource = new _this.eventSourceConstructor(url, { withCredentials: _this.withCredentials });
                            }
                            else {
                                // Non-browser passes cookies via the dictionary
                                var cookies = _this.httpClient.getCookieString(url);
                                var headers = {};
                                headers.Cookie = cookies;
                                var _a = getUserAgentHeader(), name_1 = _a[0], value = _a[1];
                                headers[name_1] = value;
                                eventSource = new _this.eventSourceConstructor(url, { withCredentials: _this.withCredentials, headers: __assign({}, headers, _this.headers) });
                            }
                            try {
                                eventSource.onmessage = function (e) {
                                    if (_this.onreceive) {
                                        try {
                                            _this.logger.log(LogLevel.Trace, "(SSE transport) data received. " + getDataDetail(e.data, _this.logMessageContent) + ".");
                                            _this.onreceive(e.data);
                                        }
                                        catch (error) {
                                            _this.close(error);
                                            return;
                                        }
                                    }
                                };
                                eventSource.onerror = function (e) {
                                    var error = new Error(e.data || "Error occurred");
                                    if (opened) {
                                        _this.close(error);
                                    }
                                    else {
                                        reject(error);
                                    }
                                };
                                eventSource.onopen = function () {
                                    _this.logger.log(LogLevel.Information, "SSE connected to " + _this.url);
                                    _this.eventSource = eventSource;
                                    opened = true;
                                    resolve();
                                };
                            }
                            catch (e) {
                                reject(e);
                                return;
                            }
                        })];
                }
            });
        });
    };
    ServerSentEventsTransport.prototype.send = function (data) {
        return __awaiter(this, void 0, void 0, function () {
            return __generator(this, function (_a) {
                if (!this.eventSource) {
                    return [2 /*return*/, Promise.reject(new Error("Cannot send until the transport is connected"))];
                }
                return [2 /*return*/, sendMessage(this.logger, "SSE", this.httpClient, this.url, this.accessTokenFactory, data, this.logMessageContent, this.withCredentials, this.headers)];
            });
        });
    };
    ServerSentEventsTransport.prototype.stop = function () {
        this.close();
        return Promise.resolve();
    };
    ServerSentEventsTransport.prototype.close = function (e) {
        if (this.eventSource) {
            this.eventSource.close();
            this.eventSource = undefined;
            if (this.onclose) {
                this.onclose(e);
            }
        }
    };
    return ServerSentEventsTransport;
}());
export { ServerSentEventsTransport };
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