/**

 * @author raph

 */

var socket,

    tlPaper,

    twCx = {

        zoomLevel : 1,

        followLast : true,

        position : 0,

        date_levels : [

            15 * 60 * 1000,

            5 * 60 * 1000,

            60 * 1000,

            15 * 1000

        ],

        timeLevel : 2,

        deltaX : 30,

        tlWidth : 98,

        tlHeight : 450,

        globalWords : {}

        },

    tlBuffer = '',

    relHover = null,

    wheelDelta = 0,

    rx_word = /[^ \.&;,'"!\?@#\d\(\)\+\[\]\\\…\-«»:\/]{3,}/g;

function arc(source, target) {

    var x3 = .3 * target.y - .3 * source.y + .8 * source.x + .2 * target.x;

    var y3 = .8 * source.y + .2 * target.y - .3 * target.x + .3 * source.x;

    var x4 = .3 * target.y - .3 * source.y + .2 * source.x + .8 * target.x;

    var y4 = .2 * source.y + .8 * target.y - .3 * target.x + .3 * source.x;

    return "M" + source.x + " " + source.y + "C" + [x3, y3, x4, y4, target.x, target.y].join(" ");

}

function countWords(text, wordobj) {

    var tab = text.match(rx_word);

    for (var i in tab) {

        var word = tab[i].toLowerCase();

        if (wordobj[word]) {

            wordobj[word]++;

        } else {

            wordobj[word] = 1;

        }

    }

}

function addTweet(tweet) {

    function backRef(source_id, target_id, type) {

        var target = tweetById(target_id);

        if (target) {

            var brobj = {

                "referenced_by_id" : source_id,

                "type" : type

            }

            if (target.backRefs) {

                target.backRefs.push(brobj);

            } else {

                target.backRefs = [ brobj ]

            }

        }

    }

    var tab = tweet.text.split(/\&\#|\;/),

        txt = '';

    for (i = 0; i < tab.length; i++) {

        txt += (i % 2 && parseInt(tab[i]) != NaN) ? String.fromCharCode(tab[i]) : tab[i];

    }

    tweet.text = txt;

    twCx.tweets.push(tweet);

    twCx.idIndex.push(tweet.id);

    if (tweet.in_reply_to_status_id) {

        backRef( tweet.id, tweet.in_reply_to_status_id, "reply" );

    }

    if (tweet.retweeted_status) {

        backRef( tweet.id,  tweet.retweeted_status.id, "retweet" );

    }

    countWords(tweet.text, twCx.globalWords);

    var creadate = new Date(tweet.created_at).valueOf();

    if (!twCx.timeline.length) {

        twCx.timeline = [ populateDateStruct(0, twCx.date_levels[0] * parseInt(creadate / twCx.date_levels[0])) ]

    }

    while (creadate > twCx.timeline[twCx.timeline.length - 1].end) {

        twCx.timeline.push( populateDateStruct(0, twCx.timeline[twCx.timeline.length - 1].end) );

    }

    insertIntoDateStruct(twCx.timeline, tweet);

}

function getSliceContent(slice) {

    if (slice.slices) {

        var result = [];

        for (var i in slice.slices) {

            result = result.concat(getSliceContent(slice.slices[i]));

        }

    } else {

        var result = slice.tweets;

    }

    return result;

}

function flattenDateStruct(slices, target_level) {

    var current_level = slices[0].level,

        result = [];

    if (current_level < target_level) {

        if (slices[0].slices) {

            for (var i in slices) {

                result = result.concat(flattenDateStruct(slices[i].slices, target_level));

            }

        }

    }

    else {

        for (var i in slices) {

            result.push({

                "start" : slices[i].start,

                "end" : slices[i].end,

                "tweets" : getSliceContent(slices[i])

            });

        }

    }

    return result;

}

function trimFDS(slices) {

    while (slices[0].tweets.length == 0) {

        slices.splice(0,1);

    }

    while (slices[slices.length - 1].tweets.length == 0) {

        slices.pop();

    }

    return slices;

}

function populateDateStruct(level, start) {

    var end = start + twCx.date_levels[level],

        struct = {

            "level" : level,

            "start" : start,

            "end" : end

        };

    if (level < twCx.date_levels.length - 1) {

        struct.slices = [];

        var newstart = start;

        while (newstart < end) {

            struct.slices.push(populateDateStruct(level + 1, newstart));

            newstart += twCx.date_levels[level + 1];

        }

    } else {

        struct.tweets = [];

    }

    return struct;

}

function insertIntoDateStruct(slices, tweet) {

    var creadate = new Date(tweet.created_at).valueOf();

    for (var i in slices) {

        if (creadate < slices[i].end) {

            if (slices[i].slices) {

                insertIntoDateStruct(slices[i].slices, tweet);

            } else {

                slices[i].tweets.push(tweet.id);

            }

            break;

        }

    }

}

function placeHolder(className) {

    return '<li class="placeholder ' + className + '"></li>';

}

function tweetById(tweetid) {

    var pos = twCx.idIndex.indexOf(tweetid);

    return (pos == -1) ? false : twCx.tweets[pos];

}

function selectTweet(tweetid) {

    var pos = twCx.idIndex.indexOf(tweetid);

    if (pos != -1) {

        twCx.position = pos;

        twCx.followLast = (twCx.position == twCx.tweets.length - 1);

        updateDisplay()

    }

}

function tweetToHtml(tweet, className, elName) {

    if (!tweet) {

        return placeHolder(className);

    }

    var el = (elName ? elName : 'li');

    var html = '<' + el + ' class="tweet ' + className + '" id="tweet_' + tweet.id + '"';

    if (className != 'full') {

        html += ' onclick="selectTweet(\'' + tweet.id + '\'); return false;" onmouseover="rolloverTweet(\'' + tweet.id + '\');"';

    } else {

        html += ' onmouseover="$(\'#hovertweet\').hide();"';

    }

    if (twCx.followLast && className == 'full' && el == 'li') {

        html += ' style="display: none"';

    }

    html += '>';

    if (tweet.annotations.length) {

        html += '<div class="annotations">';

        for (var i in tweet.annotations) {

            html += '<div class="annotation" style="width:' + (100/tweet.annotations.length) + '%; background:' + annotations[tweet.annotations[i]].colors[(className == 'icons' ? 'timeline' : 'tweet')] + '"></div>';

        }

        html += '</div>';

    }

    html += '<div class="twmain">';

    a_user = '<a href="http://twitter.com/' + tweet.user.screen_name + '" var target="_blank" title="' + tweet.user.name + '">';

    html += '<div class="around_img">' + a_user + '<img class="profile_image" src="' + tweet.user.profile_image_url + '" /></a>';

    if (className == 'full') {

        html += '<p class="created_at">' + new Date(tweet.created_at).toLocaleTimeString() + '</p>';

    }

    html += '</div>';

    if (className != 'icons') {

        lastend = 0;

        var txt = '',

            entities = [];

        for (var i in tweet.entities.hashtags) {

            entities.push({

                "start" : tweet.entities.hashtags[i].indices[0],

                "end" : tweet.entities.hashtags[i].indices[1],

                "html" : '<a href="http://twitter.com/search?q=%23' + tweet.entities.hashtags[i].text + '" target="_blank">#' + tweet.entities.hashtags[i].text + '</a>'

            });

        }

        for (var i in tweet.entities.urls) {

            entities.push({

                "start" : tweet.entities.urls[i].indices[0],

                "end" : tweet.entities.urls[i].indices[1],

                "html" : '<a href="' + tweet.entities.urls[i].expanded_url + '" target="_blank">' + tweet.entities.urls[i].expanded_url + '</a>'

            });

        }

        for (var i in tweet.entities.user_mentions) {

            entities.push({

                "start" : tweet.entities.user_mentions[i].indices[0],

                "end" : tweet.entities.user_mentions[i].indices[1],

                "html" : '<a href="http://twitter.com/' + tweet.entities.user_mentions[i].screen_name + '" target="_blank" title="' + tweet.entities.user_mentions[i].name + '">@' + tweet.entities.user_mentions[i].screen_name + '</a>'

            });

        }

        entities.sort(function(a, b) { return a.start - b.start });

        for (var i in entities) {

            txt += tweet.text.substring(lastend, entities[i].start) + entities[i].html;

            lastend = entities[i].end;

        }

        txt += tweet.text.substring(lastend);

        html += '<p class="tweet_text"><b>' + a_user + '@' + tweet.user.screen_name + '</b></a>: ' + txt + '</p>';

    }

    html += '</div></' + el + '>';

    return html;

}

function tlIdFromPos(x, y) {

    if (x < twCx.deltaX) {

        return null;

    }

    var ligne = Math.floor(( twCx.tlHeight - y ) / twCx.scaleY),

        colonne = Math.floor(( x - twCx.deltaX ) / twCx.scaleX ),

        l = 0;

    if (colonne >= twCx.tlOnDisplay[ligne].totalTweets) {

        return null;

    }

    for (var i in twCx.tlOnDisplay[ligne].displayData) {

        var nl = l + twCx.tlOnDisplay[ligne].displayData[i].length;

        if (colonne < nl) {

            return {

                "id" : twCx.tlOnDisplay[ligne].displayData[i][colonne - l],

                "annotation" : i

            }

        }

        l = nl;

    }

}

function tlPosTweet(tweet, annotation) {

    var x,

        y,

        dt = new Date(tweet.created_at).valueOf(),

        ann = ( annotation ? annotation : ( tweet.annotations.length ? tweet.annotations[0] : 'default' ) );

    for (var i = 0; i < twCx.tlOnDisplay.length; i++) {

        if (twCx.tlOnDisplay[i].end > dt) {

            y = twCx.tlHeight - (i + .5) * twCx.scaleY;

            var l = 0;

            for (var j in twCx.tlOnDisplay[i].displayData) {

                if (j == ann) {

                    var p = twCx.tlOnDisplay[i].displayData[j].indexOf(tweet.id);

                    if (p != -1) {

                        x = twCx.deltaX + twCx.scaleX * ( p + l + .5 );

                    }

                    break;

                }

                l += twCx.tlOnDisplay[i].displayData[j].length;

            }

            break;

        }

    }

    return ( x && y ? { "x" : x, "y" : y } : null);

}

function rolloverTweet(tweetid, annotation) {

    var t = tweetById(tweetid),

        p = tlPosTweet(t, annotation);

    if (t && p) {

        var ptl = $("#timeline").offset();

        $("#hovercontent").html(tweetToHtml(t, 'full', 'div'));

        $("#hovertweet").css({

            "left" : parseInt(ptl.left + p.x) + "px",

            "top" : parseInt(ptl.top + p.y),

            "display" : "block"});

        if (relHover) {

            relHover.remove();