const fs = require("fs");
const { app, ipcMain } = require("electron");

const Emitter = require("events");
const events = new Emitter();

const cli = app.commandLine;
const lang = require("./lang");

function hasArgs() {
	if (cli.hasSwitch("cli") ||
		cli.hasSwitch("help") ||
		cli.hasSwitch("mods") ||
		cli.hasSwitch("update") ||
		cli.hasSwitch("launch") ||
		cli.hasSwitch("setpath") ||
		cli.hasSwitch("version") ||
		cli.hasSwitch("gamepath")) {
		return true;
	} else {return false}
}

function exit(code) {
	if (hasArgs()) {process.exit(code)}
}

async function init() {
	if (cli.hasSwitch("help")) {
	console.log(`options:
  --help     ${lang("cli.help.help")}
  --debug    ${lang("cli.help.debug")}
  --version  ${lang("cli.help.version")}

  --cli      ${lang("cli.help.cli")}
  --update   ${lang("cli.help.update")}
  --setpath  ${lang("cli.help.setpath")}`)
		// In the future --setpath should be able to understand
		// relative paths, instead of just absolute ones.
		exit();
	}

	if (cli.hasSwitch("update")) {ipcMain.emit("update")}
	if (cli.hasSwitch("version")) {
		console.log("Viper: v" + require("../package.json").version);
		console.log("Node: " + process.version);
		console.log("Electron: v" + process.versions.electron);
		exit();
	}

	if (cli.hasSwitch("setpath")) {
		if (cli.getSwitchValue("setpath") != "") {
			ipcMain.emit("setpathcli", cli.getSwitchValue("setpath"));
		} else {
			console.error(`error: ${lang("cli.setpath.noarg")}`);
			exit(1);
		}
	}

	if (cli.hasSwitch("launch")) {
		switch(cli.getSwitchValue("launch")) {
			case "vanilla":
				ipcMain.emit("launchVanilla");
				break;
			default:
				ipcMain.emit("launch");
				break;
		}
	}

	if (cli.hasSwitch("mods")) {ipcMain.emit("getmods")}
}

module.exports = {
	hasArgs,
	init, exit, 
	hasParam: (arg) => {
		return cli.hasSwitch(arg);
	},
	param: (arg) => {
		return cli.getSwitchValue(arg);
	}
}