#!/usr/bin/env node

// First configure the logger so it does not spam the console
const logger = require("../lib/logger");
logger.transports.console.level = "warning";

const models = require("../lib/models/");
const readline = require("readline-sync");
const minimist = require("minimist");

var usage = `

Command-line utility to create users for email-signin.

Usage: bin/manage_users [--pass password] (--add | --del) user-email
	Options:
		--add 	Add user with the specified user-email
		--del 	Delete user with specified user-email
		--pass	Use password from cmdline rather than prompting
`

// Using an async function to be able to use await inside
async function createUser(argv) {
	var existing_user = await models.User.findOne({where: {email: argv["add"]}});
	// Cannot create already-existing users
	if(existing_user != undefined) {
		console.log("User with e-mail "+existing_user.email+" already exists! Aborting ...");
		process.exit(1);
	}

	// Find whether we use cmdline or prompt password
	if(argv["pass"] == undefined) {
		var pass = readline.question("Password for "+argv["add"]+":", {hideEchoBack: true});
	} else {
		console.log("Using password from commandline...");
		var pass = "" + argv["pass"];
	}

	// Lets try to create, and check success
	var ref = await models.User.create({email: argv["add"], password: pass});
	if(ref == undefined) {
		console.log("Could not create user with email "+argv["add"]);
		process.exit(1);
	} else
		console.log("Created user with email "+argv["add"]);
}

// Using an async function to be able to use await inside
async function deleteUser(argv) {
	// Cannot delete non-existing users
	var existing_user = await models.User.findOne({where: {email: argv["del"]}});
	if(existing_user == undefined) {
		console.log("User with e-mail "+argv["del"]+" does not exist, cannot delete");
		process.exit(1);
	}

	// Sadly .destroy() does not return any success value with all
	// backends. See sequelize #4124
	await existing_user.destroy();
	console.log("Deleted user "+argv["del"]+" ...");
}

var options = {
	add: createUser,
	del: deleteUser,
};

// Perform commandline-parsing
var argv = minimist(process.argv.slice(2));

var keys = Object.keys(options);
var opts = keys.filter((key) => argv[key] !== undefined);
var action = opts[0];

// Check for options missing
if (opts.length === 0) {
	console.log(`You did not specify either ${keys.map((key) => `--${key}`).join(' or ')}!`);
	console.log(usage);
	process.exit(1);
}

// Check if both are specified
if (opts.length > 1) {
	console.log(`You cannot ${action.join(' and ')} at the same time!`);
	console.log(usage);
	process.exit(1);
}

// Call respective processing functions
options[action](argv).then(function() {
  process.exit(0);
});