const chai = require("chai");
const expect = chai.expect;
const path = require("path");
const fs = require("fs");
const {JSDOM} = require("jsdom");
const express = require("express");

const translations = {
	"MMM-Module": {
		"Hello": "Hallo",
		"Hello {username}": "Hallo {username}"
	}
};

const coreTranslations = {
	"Hello": "XXX",
	"Hello {username}": "XXX",
	"FOO": "Foo",
	"BAR {something}": "Bar {something}"
};

const translationsFallback = {
	"MMM-Module": {
		"Hello": "XXX",
		"Hello {username}": "XXX",
		"FOO": "XXX",
		"BAR {something}": "XXX",
		"A key": "A translation"
	}
};

const coreTranslationsFallback = {
	"FOO": "XXX",
	"BAR {something}": "XXX",
	"Hello": "XXX",
	"Hello {username}": "XXX",
	"A key": "XXX",
	"Fallback": "core fallback"
};

function setTranslations(Translator) {
	Translator.translations = translations;
	Translator.coreTranslations = coreTranslations;
	Translator.translationsFallback = translationsFallback;
	Translator.coreTranslationsFallback = coreTranslationsFallback;
}

describe("Translator", function() {
	describe("translate", function() {
		it("should return custom module translation", function(done) {
			const dom = new JSDOM(`<script src="${path.join(__dirname, "..", "..", "..", "js", "translator.js")}">`, { runScripts: "dangerously",
				resources: "usable" });
			dom.window.onload = function() {
				const {Translator} = dom.window;
				setTranslations(Translator);
				let translation = Translator.translate({name: "MMM-Module"}, "Hello");
				expect(translation).to.be.equal("Hallo");
				translation = Translator.translate({name: "MMM-Module"}, "Hello {username}", {username: "fewieden"});
				expect(translation).to.be.equal("Hallo fewieden");
				done();
			};
		});

		it("should return core translation", function(done) {
			const dom = new JSDOM(`<script src="${path.join(__dirname, "..", "..", "..", "js", "translator.js")}">`, { runScripts: "dangerously",
				resources: "usable" });
			dom.window.onload = function() {
				const {Translator} = dom.window;
				setTranslations(Translator);
				let translation = Translator.translate({name: "MMM-Module"}, "FOO");
				expect(translation).to.be.equal("Foo");
				translation = Translator.translate({name: "MMM-Module"}, "BAR {something}", {something: "Lorem Ipsum"});
				expect(translation).to.be.equal("Bar Lorem Ipsum");
				done();
			};
		});

		it("should return custom module translation fallback", function(done) {
			const dom = new JSDOM(`<script src="${path.join(__dirname, "..", "..", "..", "js", "translator.js")}">`, { runScripts: "dangerously",
				resources: "usable" });
			dom.window.onload = function() {
				const {Translator} = dom.window;
				setTranslations(Translator);
				const translation = Translator.translate({name: "MMM-Module"}, "A key");
				expect(translation).to.be.equal("A translation");
				done();
			};
		});

		it("should return core translation fallback", function(done) {
			const dom = new JSDOM(`<script src="${path.join(__dirname, "..", "..", "..", "js", "translator.js")}">`, { runScripts: "dangerously",
				resources: "usable" });
			dom.window.onload = function() {
				const {Translator} = dom.window;
				setTranslations(Translator);
				const translation = Translator.translate({name: "MMM-Module"}, "Fallback");
				expect(translation).to.be.equal("core fallback");
				done();
			};
		});

		it("should return translation with placeholder for missing variables", function(done) {
			const dom = new JSDOM(`<script src="${path.join(__dirname, "..", "..", "..", "js", "translator.js")}">`, { runScripts: "dangerously",
				resources: "usable" });
			dom.window.onload = function() {
				const {Translator} = dom.window;
				setTranslations(Translator);
				const translation = Translator.translate({name: "MMM-Module"}, "Hello {username}");
				expect(translation).to.be.equal("Hallo {username}");
				done();
			};
		});

		it("should return key if no translation was found", function(done) {
			const dom = new JSDOM(`<script src="${path.join(__dirname, "..", "..", "..", "js", "translator.js")}">`, { runScripts: "dangerously",
				resources: "usable" });
			dom.window.onload = function() {
				const {Translator} = dom.window;
				setTranslations(Translator);
				const translation = Translator.translate({name: "MMM-Module"}, "MISSING");
				expect(translation).to.be.equal("MISSING");
				done();
			};
		});
	});

	describe("load", function() {
		const mmm = {
			name: "TranslationTest",
			file(file) {
				return `http://localhost:3000/translations/${file}`;
			}
		};

		let server;

		before(function() {
			const app = express();

			app.get("/translations/:file", function(req, res) {
				res.status(200)
					.header("Access-Control-Allow-Origin", "*")
					.json(require(path.join(__dirname, "..", "..", "..", "tests", "configs", "data", req.params.file)));
			});

			server = app.listen(3000);
		});

		after(function() {
			server.close();
		});

		it("should load translations", function(done) {
			const dom = new JSDOM(`<script>var Log = {log: function(){}};</script><script src="${path.join(__dirname, "..", "..", "..", "js", "translator.js")}">`, { runScripts: "dangerously",
				resources: "usable" });
			dom.window.onload = function() {
				const {Translator} = dom.window;
				const file = "TranslationTest.json";

				Translator.load(mmm, file, false, function() {
					const json = require(path.join(__dirname, "..", "..", "..", "tests", "configs", "data", file));
					expect(Translator.translations[mmm.name]).to.be.deep.equal(json);
					done();
				});
			};
		});

		it("should load translation fallbacks", function(done) {
			const dom = new JSDOM(`<script>var Log = {log: function(){}};</script><script src="${path.join(__dirname, "..", "..", "..", "js", "translator.js")}">`, { runScripts: "dangerously",
				resources: "usable" });
			dom.window.onload = function() {
				const {Translator} = dom.window;
				const file = "TranslationTest.json";

				Translator.load(mmm, file, true, function() {
					const json = require(path.join(__dirname, "..", "..", "..", "tests", "configs", "data", file));
					expect(Translator.translationsFallback[mmm.name]).to.be.deep.equal(json);
					done();
				});
			};
		});

		it("should not load translations, if module fallback exists", function(done) {
			const dom = new JSDOM(`<script>var Log = {log: function(){}};</script><script src="${path.join(__dirname, "..", "..", "..", "js", "translator.js")}">`, { runScripts: "dangerously",
				resources: "usable" });
			dom.window.onload = function() {
				const {Translator, XMLHttpRequest} = dom.window;
				const file = "TranslationTest.json";

				XMLHttpRequest.prototype.send = function() {
					throw "Shouldn't load files";
				};

				Translator.translationsFallback[mmm.name] = {
					Hello: "Hallo"
				};

				Translator.load(mmm, file, false, function() {
					expect(Translator.translations[mmm.name]).to.be.undefined;
					expect(Translator.translationsFallback[mmm.name]).to.be.deep.equal({
						Hello: "Hallo"
					});
					done();
				});
			};
		});
	});
});