(function (win) {
	var baseSettings = {
		version: '1.0',
		backend: 'https://www.pornme.pm/ajax.signup.php',
		isChecking: false,
		alerter: function (messages) {
			var message = '';

			for (var m in messages) {
				if (messages.hasOwnProperty(m)) {
					message += messages[m].join("\n") + "\n"
				}
			}

			alert(message);
		}
	};

	function _checkUser(name) {
		if (name.length < 4) {
			baseSettings.alerter({username: ['Bitte mindestens 4 Zeichen eingeben']});
			return false;
		}

		if (name.length > 80) {
			baseSettings.alerter({username: ['Bitte maximal 80 Zeichen eingeben']});
			return false;
		}

		return true;
	}

	function _checkEmail(mail) {
		if (!mail.match(/.+@.+\..+/)) {
			baseSettings.alerter({email: ['Bitte geben Sie eine gültige E-Mail Adresse ein.']});
			return false;
		}

		return true;
	}

	function _checkPassword(pass) {
		if (pass.length < 5) {
			baseSettings.alerter({password: ['Bitte mindestens 5 Zeichen eingeben.']});
			return false;
		}

		return true;
	}

	function _submitCheck(user, mail, password) {
		if (!baseSettings.isChecking && _checkUser(user) && _checkEmail(mail) && _checkPassword(password)) {
			baseSettings.isChecking = true;

			var request = new XMLHttpRequest();
			var url = baseSettings.backend + '?signup_username=' + encodeURIComponent(user) + '&email=' + encodeURIComponent(mail) +
				'&signup_password=' + encodeURIComponent(password) +
				'&w=25792&ws=1810002&wt=';

			request.open('GET', url, true);

			request.onreadystatechange = function () {
				if (this.readyState === 4) {
					if (this.status >= 200 && this.status < 400) {
						// Success!
						var reply = JSON.parse(this.responseText);
						if (reply.hasOwnProperty('login_link')) {
							window.top.location = 'https://www.pornme.pm/' + reply.login_link;
						} else {
							if (reply.hasOwnProperty('message')) {
								var elem = document.createElement('textarea');
								elem.innerHTML = reply.message;
								var decoded = elem.value;
								elem = null;

								baseSettings.alerter({'default': [decoded]});
							} else {
								baseSettings.alerter({'default': ['Die Anmeldung war möglicherweise nicht erfolgreich. Bitte prüfen Sie Ihre E-Mails.']});
							}
							baseSettings.isChecking = false;
						}
					} else {
						baseSettings.alerter({'default': ['Die Anmeldung war nicht erfolgreich. Bitte versuchen Sie es später noch einmal.']});
						baseSettings.isChecking = false;
					}
				}
			};

			request.send();
			request = null;
		}

		return false;
	}

	win.pmApi = {
		checkUsername: function (username) {
			var user = document.getElementById(username).value;
			return _checkUser(user);
		},

		checkEmail: function (email) {
			var mail = document.getElementById(email).value;
			return _checkEmail(mail);
		},

		checkPassword: function (password) {
			var pass = document.getElementById(password).value;
			return _checkPassword(pass);
		},

		checkSignup: function (username, email, password, form) {
			baseSettings.form = form;
			var user = document.getElementById(username).value;
			var mail = document.getElementById(email).value;
			var pass = document.getElementById(password).value;
			return _submitCheck(user, mail, pass);
		},

		setAlert: function (callable) {
			baseSettings.alerter = callable;
		}
	}
})(window);