var blank = new Image();
blank.src = '/media/images/blank.gif';

var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-332367-14']);
_gaq.push(['_setDomainName', 'opt-techintl.com']);
_gaq.push(['_trackPageview']);

addScript('/media/jquery.min.js', init);

function addScript(src, onload){
    var ga = document.createElement('script');
    ga.type = 'text/javascript';
    ga.async = true;
    ga.src = src;
    if (document.all && onload) {
        ga.onreadystatechange = function(){
            if (ga.readyState === 'loaded' || ga.readyState === 'complete') {
                onload.apply(this);
            }
        }
    }
    else {
        ga.onload = onload;
    }
    var s = document.getElementsByTagName('script')[0];
    s.parentNode.insertBefore(ga, s);
}

function fixPng(png){
    var src = png.attr('src');
    if (!png.css('width')) {
        png.css('width', png.width());
    }
    if (!png.css('height')) {
        png.css('height', png.height());
    }
    png.onload = $.noop;
    png.src = blank.src;
    png.runtimeStyle.filter =
        'progid:DXImageTransform.Microsoft.AlphaImageLoader(src="' + src +
        '",sizingMethod="scale")';
}

function getCookie(name) {
    if (document.cookie && document.cookie != '') {
        var cookies = document.cookie.split(';');
        for (var i = 0; i < cookies.length; i++) {
            var cookie = $.trim(cookies[i]);
            // does this cookie string begin with the name we want?
            if (cookie.substring(0, name.length + 1) == (name + '=')) {
                return decodeURIComponent(cookie.substring(name.length + 1));
            }
        }
    }
    return null;
}

function sameOrigin(url) {
    // url could be relative or scheme relative or absolute
    var host = document.location.host; // host + port
    var protocol = document.location.protocol;
    var sr_origin = '//' + host;
    var origin = protocol + sr_origin;
    // Allow absolute or scheme relative URLs to same origin
    return (url == origin || url.slice(0, origin.length + 1) == origin + '/') ||
        (url == sr_origin || url.slice(0, sr_origin.length + 1) == sr_origin + '/') ||
        // or any other URL that isn't scheme relative or absolute i.e relative.
        !(/^(\/\/|http:|https:).*/.test(url));
}

function safeMethod(method) {
    return /^(GET|HEAD|OPTIONS|TRACE)$/.test(method);
}

function kill(event) {
    event.preventDefault();
    event.stopPropagation();
    event.stopImmediatePropagation();
}

function initialize() {
    
    var login_form = $('#login_form');
    var login_info = $('#login_info');
    var user_name = $('#login_name');
    
    var login_email = $('#login_email');
    var login_password = $('#login_password');
    
    $(document).ajaxSend(function(event, xhr, settings) {
        if (!safeMethod(settings.type) && sameOrigin(settings.url)) {
            xhr.setRequestHeader('X-CSRFToken', getCookie('csrftoken'));
        }
    });
    
    $('#search-form a.form_button').click(function (event) {
        kill(event);
        $(this).parents('form').first().submit(); 
    });

    $('#login_form a.form_button').click(login);
    
    if (window.currentUserRealName) {
        hideLoginForm(window.currentUserRealName);
    } else if (!/account\/logout\/$/.test(location.pathname)) {
        login_form.show();
    }

    function login(event) {
        kill(event);
        var email = login_email.val();
        var password = login_password.val();
        if (!email || !password) {
            alert('Please enter an e-mail address and a password.');
            return;
        }
        var xhr = $.ajax({
            url: '/account/login/ajax/',
            type: 'POST',
            data: { username: email, password: password }
        });
        xhr.success(handleLogin);
        xhr.error(function() {
            alert('Could not complete login. Please try again.');
            login_form.show();
        });
        login_form.hide();
    }
    
    function handleLogin(data) {
        if (data && data.login_response) {
            data = data.login_response;
        }
        if (data && data.result && data.result === 'success' && data.name) {
            hideLoginForm(data.name);
            return;
        }
        if (data.result) {
            alert(data.result);
        } else {
            alert('Login failed. Please try again.');
        }
        login_form.show();
    }
    
    function hideLoginForm(name) {
        login_form.hide();
        user_name.html(name);
        login_info.show();
    }
}

function init(){
    $(document).ready(initialize);
};

addScript('http://www.google-analytics.com/ga.js');