var cache = {}

function escapeHtml(txt) {
    if (!txt) { return ""; }
    else { return $("<span>").text(txt).html(); }
}

function linkify(text) {
  var URLRegex = /((\b(http\:\/\/|https\:\/\/|ftp\:\/\/)|(www\.))+(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?)/gi;
  return text.replace(URLRegex, linkReplace);
}

function linkReplace(match){
  var PicRegex = /\.(jpg|jpeg|png|gif|bmp)$/i;
  var matchWithoutParams = match.replace(/\?.*$/i, "")
  if (PicRegex.test(matchWithoutParams)){
    return "<a target='_blank' href='" + match + "'><img src='" + match + "'></a>"
  } else {
    return "<a target='_blank' href='" + match + "'>" + match + "</a>"
  }
}

function buildMsgContent(content) {
  return linkify(content)
}

var SpinnerImage = '<img class="spinner" src="/static/spinner.gif" />';

function buildMessageDiv(msg, isLoading) {
    var nick = escapeHtml(msg.nick);
    var msgId = !isLoading ? 'id="message-' + msg.message_id + '"' : '';
    var spinnerHtml = isLoading ? SpinnerImage : '';
    var loadingClass = isLoading ? ' loading' : '';
    return '<div class="msgDiv ' + loadingClass + '" ' + msgId  + '>'
        + '<b><a href="/u/' + nick + ' ">' + nick + '</a>: </b>'
        + buildMsgContent(msg.content)
        + spinnerHtml
	+ '</div>';
}

function buildUserDiv(user) {
    if (user.avatar) {
        return '<div class="username">'
	    + '<a href="/u/' + escapeHtml(user.nick) + '" target="_blank">'
	    + '<img src="' + user.avatar + '" width="50" height="50">'
	    + escapeHtml(user.nick) + '</a></div>';
    } else {
        return '<div class="username">'
	    + '<a href="/u/' + escapeHtml(user.nick) + '" target="_blank">'
	    + escapeHtml(user.nick) + '</a></div>';
    }
}

function buildGrowlDataAndPopDatShit(msg) {
	var nick = escapeHtml(msg.nick);
	nick = '<a href="/u/' + nick + ' " style="color:pink">' + nick + '</a>:'
	var msg = buildMsgContent(msg.content)
	growl(nick, msg)
}

function growl(user, msg) {
    $.gritter.add({
	// (string | mandatory) the heading of the notification
	title: user,
	// (string | mandatory) the text inside the notification
	text: msg
    });
}

function handleMsgError(resp) {
    var respText = resp.responseText ? resp.responseText.trim() : false;
    if (respText  == 'MUST_LOGIN') {
        alert("Can't send message! Please login.");
    } else if (respText) {
        alert("Can't send message! (" + respText + ")");
    } else {
        alert("Can't send message!");
    }
}

function submitMessage() {
    var content = $.trim($('#msgInput').val());
    if (content ==  '') { return; }
    PostedMessages.push(content);
    $('#msgInput').val('');

    var msg = { 'nick': Nick, 'content': content };
    var div = addNewMessage(msg, true);

    var onSuccess = function(json) {
        div.attr('id', 'message-' + json)
            .removeClass('loading').addClass('loaded');
	div.find('.spinner').remove();
    };
    var onError = function(resp, textStatus, errorThrown) {
	div.remove();
        handleMsgError(resp);
    };
    
    $.ajax({
	type: 'GET',
	timeout: 5000,
	url: '/msg',
	data: { 'room': Room, 'content': content },
	cache: false,
	dataType: 'json',
	success: onSuccess,
	error: onError
    });
}

function ifEnter(fn) {
    return function(e) {
        if (e.keyCode == 13) { fn(); }
    };
}

function isScrolledToBottom(div) {
    return Math.abs(div.scrollTop - (div.scrollHeight - div.offsetHeight)) <= 3;
}

function scrollToBottom(div) {
    div.scrollTop = div.scrollHeight;
}

// Give images time to start loading before scrolling.
// Needed until server knows size of images.
function delayedScrollToBottom(delay) {
    setTimeout(scrollToBottom, delay, $('#messageList')[0]);
}

function addNewMessages(msgs) {
    var wasScrolledToBottom = isScrolledToBottom($('#messageList')[0]);
    var msgStr = $.map(msgs, buildMessageDiv).join('');
    $('#messageList').append(msgStr);

    if (wasScrolledToBottom) { delayedScrollToBottom(500); }
}

function addNewMessage(msg, isLoading) {
    var wasScrolledToBottom = isScrolledToBottom($('#messageList')[0]);
    var msgStr = buildMessageDiv(msg, isLoading);
    var div = $(msgStr).appendTo('#messageList');
    if (wasScrolledToBottom) { delayedScrollToBottom(500); }
    return div;
}

function setUserList(users) {
    $("#userList").html($.map(users, buildUserDiv).join(''));
}

function updateUI(msgs, users) {
    if (window['growlize'] && msgs && msgs.length > 0) {
	$.map(msgs, buildGrowlDataAndPopDatShit)
    } else if (msgs && msgs.length > 0) {
	addNewMessages(msgs);
    }
    if (users !== null) {
        var flattened = users.sort().join(",")
	if (!('userlist' in cache) || flattened != cache.userlist) {
            $("#userList").html($.map(users, buildUserDiv).join(''));
        }
        cache.userlist = flattened
    }
}

// A duplicate message is a message that was likely to have
// originated from this browser.
// TODO: replace w/ msg_id checks.
function isDuplicateMessage(m) {
    if (m.nick != Nick || $.inArray(m.content, PostedMessages) == -1) {
        return false;
    }
    var now = new Date().getTime();
    return m.created_on - now < 5000;
}

function refresh() {
    var onSuccess = function(json) {
        try {
            Timestamp = json.timestamp;
            var messages = $.grep(
                json.messages,
                function(m) { return !isDuplicateMessage(m) });
            updateUI(messages, json.users);
            if (typeof UnseenMsgCounter !== 'undefined') {
                UnseenMsgCounter += messages.length;
            }
        } catch(e) {
            if (IsAdmin) {
                alert("Exception in refresh");
                console.log(e);
            }
        }
        setTimeout(refresh, 1000);
    };
    var onError = function(resp, textStatus, errorThrown) {
        if (IsAdmin) {
            console.log(resp, textStatus, errorThrown);
        }
        setTimeout(refresh, 1000);
    };

    $.ajax({
        type: 'GET',
        timeout: 5000,
        url: '/refresh',
        data: { 'room': Room, 'since': Timestamp },
        cache: false,
        dataType: 'json',
        success: onSuccess,
        error: onError
    });
}

function initChat() {
    $('.msgDiv .content').each(function() {
        var t = $(this);
        t.html(buildMsgContent(t.text()));
    });

    $('#msgInput').keyup(ifEnter(submitMessage));
    $('#msgSubmit').click(submitMessage);

    delayedScrollToBottom(500);
    setTimeout(refresh, 1000);
}

function initProfile() {
    $('.logged-dump .content').each(function() {
        var t = $(this);
        t.html(buildMsgContent(t.text()));
    });

    var onSubmit = function(original_element, edit, old) {
        edit = $.trim(edit);
        if (edit == old) { return old };
        // TODO: Prevent entering script tags
        if (original_element == 'avatar' && edit.indexOf("<") != -1) {
            return old;
        }
        $.ajax({
            type: "GET",
            timeout: 5000,
            url: "/update-profile",
            data: { 'attr': original_element, 'val': edit }
        });
        if (original_element == 'avatar') {            
            var s = '<img id="avatarPic" src="' + edit + '" width="150" />';
            $('#avatarPic').replaceWith(s);
        }
        return escapeHtml(edit);
    };

    var opt = { 'default_text': 'Enter here!',
                'callback': onSubmit,
                'field_type': 'text',
                'callbackShowErrors': false };    
    $('#avatar.editable').editInPlace(opt);


    opt['field_type'] = 'textarea';
    $('#contact.editable, #bio.editable').editInPlace(opt);

};

function initLog() {
    $('.logged-dump .content').each(function() {
        var t = $(this);
        t.html(buildMsgContent(t.text()));
    });

}

function favoriteImage() {};