var app = require("app"); // Module to control application life.
var ipc = require("ipc");
var fs = require("fs-extra");
var os = require("os");
var dialog = require("dialog");
var BrowserWindow = require("browser-window");

var mainWindow = null;

app.commandLine.appendSwitch("--enable-npapi");

function initialSetup(firstTime) {
	// Display a small window to inform the user that the app is working
	setupWindow = new BrowserWindow({
		width: 275,
		height: 450,
		resizable: false,
		center: true,
		frame: false,
	});
	setupWindow.loadUrl("file://" + __dirname + "/initialsetup.html");
	// Exec installUnity.bat and wait for it to finish.
	var child = require("child_process").spawn("cmd.exe", [
		"/c",
		"utils\\installUnity.bat",
	]);
	child.on("exit", function () {
		console.log("Unity installed.");
		if (!firstTime) {
			// migration from pre-1.4
			// Back everything up, just in case
			fs.copySync(
				app.getPath("userData") + "\\config.json",
				app.getPath("userData") + "\\config.json.bak"
			);
			fs.copySync(
				app.getPath("userData") + "\\servers.json",
				app.getPath("userData") + "\\servers.json.bak"
			);
			fs.copySync(
				app.getPath("userData") + "\\versions.json",
				app.getPath("userData") + "\\versions.json.bak"
			);
		} else {
			// first-time setup
			// Copy default servers
			fs.copySync(
				__dirname + "\\defaults\\servers.json",
				app.getPath("userData") + "\\servers.json"
			);
		}

		// Copy default versions and config
		fs.copySync(
			__dirname + "\\defaults\\versions.json",
			app.getPath("userData") + "\\versions.json"
		);
		fs.copySync(
			__dirname + "\\defaults\\config.json",
			app.getPath("userData") + "\\config.json"
		);

		console.log("JSON files copied.");
		setupWindow.destroy();
		showMainWindow();
	});
}

ipc.on("exit", function (id) {
	mainWindow.destroy();
});

// Quit when all windows are closed.
app.on("window-all-closed", function () {
	if (process.platform != "darwin") app.quit();
});

app.on("ready", function () {
	// Check just in case the user forgot to extract the zip.
	zip_check = app.getPath("exe").includes(os.tmpdir());
	if (zip_check) {
		errormsg =
			"It has been detected that OpenFusionClient is running from the TEMP folder.\n\n" +
			"Please extract the entire Client folder to a location of your choice before starting OpenFusionClient.";
		dialog.showErrorBox("Error!", errormsg);
		return;
	}

	// Create the browser window.
	mainWindow = new BrowserWindow({
		width: 1280,
		height: 720,
		show: false,
		"web-preferences": { plugins: true },
	});
	mainWindow.setMinimumSize(640, 480);

	// Check for first run
	var configPath = app.getPath("userData") + "\\config.json";
	try {
		if (!fs.existsSync(configPath)) {
			console.log("Config file not found. Running initial setup.");
			initialSetup(true);
		} else {
			var config = fs.readJsonSync(configPath);
			if (!config["last-version-initialized"]) {
				console.log("Pre-1.4 config detected. Running migration.");
				initialSetup(false);
			} else {
				showMainWindow();
			}
		}
	} catch (e) {
		console.log("An error occurred while checking for the config.");
	}

	// Makes it so external links are opened in the system browser, not Electron
	mainWindow.webContents.on("new-window", function (e, url) {
		e.preventDefault();
		require("shell").openExternal(url);
	});

	mainWindow.on("closed", function () {
		mainWindow = null;
	});
});

function showMainWindow() {
	// Load the index.html of the app.
	mainWindow.loadUrl("file://" + __dirname + "/index.html");

	// Reduces white flash when opening the program
	mainWindow.webContents.on("did-finish-load", function () {
		mainWindow.show();
		// everything's loaded, tell the renderer process to do its thing
		mainWindow.webContents.executeJavaScript("loadConfig();");
		mainWindow.webContents.executeJavaScript("loadGameVersions();");
		mainWindow.webContents.executeJavaScript("loadServerList();");
	});

	mainWindow.webContents.on("plugin-crashed", function () {
		console.log("Unity Web Player crashed.");
	});

	mainWindow.webContents.on("will-navigate", function (evt, url) {
		evt.preventDefault();
		// TODO: showMessageBox rather than showErrorBox?
		switch (url) {
			case "https://audience.fusionfall.com/ff/regWizard.do?_flowId=fusionfall-registration-flow":
				errormsg =
					"The register page is currently unimplemented.\n\n" +
					'You can still create an account: type your desired username and password into the provided boxes and click "Log In". ' +
					"Your account will then be automatically created on the server. \nBe sure to remember these details!";
				dialog.showErrorBox("Sorry!", errormsg);
				break;
			case "https://audience.fusionfall.com/ff/login.do":
				dialog.showErrorBox("Sorry!", "Account management is not available.");
				break;
			case "http://forums.fusionfall.com/":
				require("shell").openExternal("https://discord.gg/DYavckB");
				break;
			default:
				mainWindow.webContents.loadURL(url);
		}
	});
}