$(document).ready(function ($) {

    var formField = $("#register_form");
    var logField = $("#register-error-log");
    var usernameField = $("#username_field");
    var passwordField = $("#password_field");
    var verifyField = $("#verify_field");
    var emailField = $("#email_field");

    var usernameExists = false;
    var emailExists = false;

    formField.submit(function (event) {

        event.preventDefault();

        $.ajax({

            type:'GET',
            url:'/player/register',
            data: {'username':usernameField.val(), 'email':emailField.val()},
            success: function (data) {
                usernameExists = data['username_exists'];
                emailExists = data['email_exists'];
            },
            error: function  (data) {
                alert(data['error']);
            }

        });

        $(document).ajaxComplete( function () {
            var validPassword = validatePassword();
            var validUsername = validateUsername();
            var validEmail = validateEmail();

            if (validPassword && validUsername && validEmail) {
                formField.unbind('submit');
                formField.submit();
            } else {
                event.preventDefault();
            }
        });

    });

    function validatePassword() {
        if (hasNumber(passwordField.val()) && hasUpper(passwordField.val()) &&
            hasLower(passwordField.val()) && hasSpecial(passwordField.val()) && passwordField.val() === verifyField.val()) {
            $("#password_log").remove();

            return true;
        } else {
            if ($("#password_log").length === 0)
                logField.append(" <p id='password_log'> - Your password must contain at least one special character, one number and one upper and lower alphabetic character! Also make sure that your password is equal in the verify field! </p> ");
            return false;
        }
    }

    function validateUsername() {
        if (usernameField.val().length >= 5 && !usernameExists) {
            $("#username_log").remove();

            return true;
        } else {
            if ($("#username_log").length === 0) {
                logField.append(" <p id='username_log'> - Your username must contain at least 5 characters and must be unique! </p> ");
            }

            return false;
        }
    }

    function validateEmail() {
        if (testEmail(emailField.val()) && !emailExists) {
            $("#email_log").remove();

            return true;
        } else {
            if ($("#email_log").length === 0) {
                logField.append(" <p id='email_log'> - Your email is not formatted correctly or already used! </p> ");
            }

            return false;
        }
    }

});

function hasNumber(s) {
    var regex = /\d/g;
    return regex.test(s);
}

function hasUpper(s) {
    return (/[A-Z]/.test(s));
}

function hasLower(s) {
    return (/[A-Z]/.test(s));
}

function hasSpecial(s) {
    var format = /[!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?]+/;
    return format.test(s);
}

function testEmail(s) {
    var format = /^(([^<>()\[\]\.,;:\s@\"]+(\.[^<>()\[\]\.,;:\s@\"]+)*)|(\".+\"))@(([^<>()[\]\.,;:\s@\"]+\.)+[^<>()[\]\.,;:\s@\"]{2,})$/i;
    return format.test(s.toLowerCase());
}