// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for details.

import {ExtensionMessage, MessagingChannel} from "../../src/common/extensionMessaging";

import {RemoteExtension} from "../../src/common/remoteExtension";

import {InterProcessMessageSender} from "../../src/common/interProcessMessageSender";

import * as assert from "assert";
import * as net from "net";
import * as Q from "q";

let mockServer: net.Server;

suite("extensionMessaging", function() {
    suite("commonContext", function() {
        const projectRootPath = "/myPath";
        const port: string = new MessagingChannel(projectRootPath).getPath();

        teardown(function() {
            if (mockServer) {
                mockServer.close();
            }
        });

        test("should successfully send a message", function(done: MochaDone) {
            let receivedMessage: ExtensionMessage;

            mockServer = net.createServer(function(client: net.Socket): void {
                mockServer.close();
                client.on("data", function(data: Buffer) {
                    const messageData: any = JSON.parse(data.toString("utf8"));
                    client.end();

                    receivedMessage = messageData.message;
                });
            });

            mockServer.on("error", done);
            mockServer.listen(port);

            const sender = RemoteExtension.atProjectRootPath(projectRootPath);

            Q({})
                .then(function() {
                    return sender.startPackager();
                })
                .then(function() {
                    assert.equal(receivedMessage, ExtensionMessage.START_PACKAGER);
                }).done(() => done(), done);
        });

        test("should successfully send a message with args", function(done: MochaDone) {
            const args = ["android"];
            let receivedMessage: ExtensionMessage;
            let receivedArgs: any;

            mockServer = net.createServer(function(client: net.Socket): void {
                mockServer.close();
                client.on("data", function(data: Buffer) {
                    const messageData: any = JSON.parse(data.toString("utf8"));
                    client.end();

                    receivedMessage = messageData.message;
                    receivedArgs = messageData.args;
                });
            });

            mockServer.on("error", done);
            mockServer.listen(port);

            const sender = RemoteExtension.atProjectRootPath(projectRootPath);

            Q({})
                .then(function() {
                    return sender.prewarmBundleCache(args[0]);
                })
                .then(function() {
                    assert.equal(receivedMessage, ExtensionMessage.PREWARM_BUNDLE_CACHE);
                    assert.deepEqual(receivedArgs, args);
                }).done(() => done(), done);
        });

        test("should reject on failed communication", function(done: MochaDone) {

            mockServer = net.createServer(function(client: net.Socket): void {
                mockServer.close();
                client.on("data", function(data: Buffer) {
                    client.end("vscodereactnative-error-marker");
                });
            });

            mockServer.on("error", done);
            mockServer.listen(port);

            const sender = RemoteExtension.atProjectRootPath(projectRootPath);

            Q({})
                .then(function() {
                    return sender.prewarmBundleCache("android");
                })
                .then(function() {
                    assert(false, "sendMessage should reject on failed communication");
                },
                function(reason: any) {
                    let expectedErrorMessage = "An error ocurred while handling message: PREWARM_BUNDLE_CACHE";
                    assert.equal(reason.message, expectedErrorMessage);
                })
                .done(() => done(), done);
        });

        test("should reject on socket error", function(done: MochaDone) {
            const sender = new InterProcessMessageSender(projectRootPath);

            Q({})
                .then(function() {
                    return sender.sendMessage(ExtensionMessage.PREWARM_BUNDLE_CACHE);
                })
                .then(function() {
                    assert(false, "sendMessage should reject on socket error");
                },
                function(reason: any) {
                    let expectedErrorMessage = "Unable to set up communication with VSCode react-native extension. Is this a react-native project, and have you made sure that the react-native npm package is installed at the root?";
                    assert.equal(reason.message, expectedErrorMessage);
                })
                .done(() => done(), done);
        });
    });
});
