/* gui interactions here
* set- functions only set/update the gui elements
* do- functions interact with the server
* show- functions do both
*/
/********************
 * Song Info Sreen
 ********************/
function resetSong() {
    if (!posChanging) {
        pauseTimer();
        setPlayState(false);
        setPosition(0);
        var data = new Object;
        data.name = '';
        data.artists = '';
        data.length = 0;
        data.uri = '';
        setSongInfo(data);
    }
}

function expandSonginfo() {
}

function resizeSonginfo() {
    $("#infoname").html(songname);
    $("#infoartist").html(artiststext);
    //bug in truncate?
    var spanwidth = $("#infoartist").width() - 38;
    $("#infoname").truncate({
        width : spanwidth,
        token : '…',
        center : true,
        multiline : false
    });
    $("#infoartist").truncate({
        width : spanwidth,
        token : '…',
        center : true,
        multiline : false
    });
    $("#infoartist").html('<a href="#controlsmodal" data-rel="popup">' + $("#infoartist").html() + '</a>');
}

function setSongInfo(data) {
    artistshtml = '';
    artiststext = '';
    songname = data.name;
    if (songname == '') {
        return;
    };

    for (var j = 0; j < data.artists.length; j++) {
        artistshtml += '<a href="#" onclick="return showArtist(\'' + data.artists[j].uri + '\');">' + data.artists[j].name + '</a>';
        artiststext += data.artists[j].name;
        if (j != data.artists.length - 1) {
            artistshtml += ', ';
            artiststext += ', ';
        }
    }

    if (data.album) {
        $("#modalalbum").html('Album: <a href="#" onclick="return showAlbum(\'' + data.album.uri + '\');">' + data.album.name + '</a>');
    }
    $("#modalname").html(songname);
    getCover(artiststext, data.album.name, '#infocover, #controlspopupimage', 'extralarge');

    var arttmp = 'Artist';

    if (data.artists.length > 1) {
        arttmp += 's';
    }
    $("#modalartist").html(arttmp + ': ' + artistshtml);

    $("#trackslider").attr("min", 0);
    songlength = data.length;
    $("#trackslider").attr("max", data.length);
    $("#songlength").html(timeFromSeconds(data.length / 1000));

    resizeSonginfo();
    $('#currenttable li').each(function() {
        $(this).removeClass("currenttrack");
        if (this.id == 'currenttable-' + data.uri) {
            $(this).addClass('currenttrack');
        }
    });
}

/***************
 * display popup
 * @param {Object} listuri
 * @param {Object} trackuri
 */
function popupTracks(e, listuri, trackuri) {
    if (!e)
        var e = window.event;
    $('#popupTrackName').html(popupData[trackuri].name);
    $('#popupAlbumName').html(popupData[trackuri].album.name);
    var child = "";
    $('#popupArtistsLi').remove();
    if (popupData[trackuri].artists.length == 1) {

        //this doesnt work
        //        child += '<a href="#" onclick="showArtist(\'' +popupData[trackuri].artists[0].uri + '\');">Show Artist <span class="popupArtistName">' + popupData[trackuri].artists[0].name + '</span></a>';
        $('#popupTracksLv').append($('<li/>', {
            'id' : "popupArtistsLi"
        }).append($('<a/>', {
            'href' : '#',
            'onclick' : 'showArtist(\'' + popupData[trackuri].artists[0].uri + '\');',
            'text' : 'Show Artist '
        }).append($('<span/>', {
            'class' : 'popupArtistName',
            'text' : popupData[trackuri].artists[0].name
        }))));

        $('#popupArtistsDiv').hide();
        //        $('#popupArtistsLi').html(child).show();
    } else {
        for (var j = 0; j < popupData[trackuri].artists.length; j++) {
            child += '<li><a href="#" onclick="showArtist(\'' + popupData[trackuri].artists[j].uri + '\');"><span class="popupArtistName">' + popupData[trackuri].artists[j].name + '</span></a></li>';
        }
        $('#popupArtistsLi').hide();
        $('#popupArtistsLv').html(child).show();
        $('#popupArtistsDiv').show();
        $('#popupArtistsLv').listview("refresh");
    }
    var hash = document.location.hash.split('?');
    var divid = hash[0].substr(1);
    if (divid == 'current') {
        $("#liaddtobottom").hide();
    } else {
        $("#liaddtobottom").show();
    }

    $('#popupTracksLv').listview().trigger("create");

    $('#popupTracksLv').listview('refresh');

    $('#popupTracks').data("list", listuri).data("track", trackuri).popup("open", {
        x : e.pageX,
        y : e.pageY
    });
    return false;
}

function showAlbumPopup() {
    uri = $('#popupTracks').data("track");
    showAlbum(popupData[uri].album.uri);
}

/*****************
 * Modal dialogs
 *****************/
function showLoading(on) {
    if (on) {
        $.mobile.loading('show', {
            text : 'Loading data from ' + PROGRAM_NAME + '. Please wait...',
            textVisible : true,
            theme : 'a'
        });
    } else {
        $.mobile.loading('hide');
    }
}

function showOffline(on) {
    if (on) {
        $.mobile.loading('show', {
            text : 'Trying to reach ' + PROGRAM_NAME + '. Please wait...',
            textVisible : true,
            theme : 'a'
        });
    } else {
        $.mobile.loading('hide');
    }
}

/*********************
 * initialize sockets
 *********************/

function initSocketevents() {
    mopidy.on("state:online", function() {
        showOffline(false);
        showLoading(true);
        getCurrentPlaylist();
        updateStatusOfAll();
        getPlaylists();
        showLoading(true);
        $(window).hashchange();
    });

    mopidy.on("state:offline", function() {
        resetSong();
        showOffline(true);
    });

    mopidy.on("event:trackPlaybackStarted", function(data) {
        mopidy.playback.getTimePosition().then(processCurrentposition, console.error);
        setPlayState(true);
        setSongInfo(data.tl_track.track);
        initTimer();
    });

    mopidy.on("event:trackPlaybackPaused", function(data) {
        //setSongInfo(data.tl_track.track);
        pauseTimer();
        setPlayState(false);
    });

    mopidy.on("event:playlistsLoaded", function(data) {
        showLoading(true);
        getPlaylists();
    });

    mopidy.on("event:volumeChanged", function(data) {
        if (!volumeChanging) {
            setVolume(data["volume"]);
        }
    });

    mopidy.on("event:playbackStateChanged", function(data) {
        switch (data["new_state"]) {
            case "stopped":
                resetSong();
                break;
            case "playing":
                mopidy.playback.getTimePosition().then(processCurrentposition, console.error);
                resumeTimer();
                setPlayState(true);
                break;
        }
    });

    mopidy.on("event:tracklistChanged", function(data) {
        getCurrentPlaylist();
    });

    mopidy.on("event:seeked", function(data) {
        setPosition(parseInt(data["time_position"]));
    });
}

/**********************
 * initialize software
 **********************/
$(document).ready(function() {
    //$(document).bind("pageinit", function() {
    //check for websockets
    if(!window.WebSocket) {
        switchContent("playlists");
        $('#playlistspane').html('<h2>Old Browser</h2><p>Sorry. Your browser isn\'t modern enough for this webapp. Modern versions of Chrome, Firefox, Safari all will do. Maybe Opera and Internet Explorer 10 also work, but it\'s not tested.</p>');  
        exit;
    }
    
    $(window).hashchange();

    // Connect to server
    mopidy = new Mopidy();
    //initialize events
    initSocketevents();

    resetSong();

    if (location.hash.length < 2) {
        switchContent("playlists");
    }

    //  $("#songinfo").resize(resizeSonginfo());
    initgui = false;
    window.onhashchange = locationHashChanged;
    // Log all events
    //mopidy.on(function() {
    //});

    //update gui status every x seconds from mopdidy
    setInterval(updateTimer, STATUS_TIMER);

    //only show backbutton if in UIWebview
    if (window.navigator.standalone) {
        $("#btback").show();
    } else {
        $("#btback").hide();
    }

    $(window).resize(function() {
        resizeSonginfo();
    });
});

/************************
 * diverse
 ************************/
function switchContent(divid, uri) {
    var hash = divid;
    if (uri) {
        hash += "?" + uri;
    }
    //    $.mobile.changePage("#" + hash);
    location.hash = "#" + hash;
}

//update timer
function updateStatusOfAll() {
    mopidy.playback.getCurrentTrack().then(processCurrenttrack, console.error);
    mopidy.playback.getTimePosition().then(processCurrentposition, console.error);
    //TODO check offline?
}

//update everything as if reloaded
function updateStatusOfAll() {
    mopidy.playback.getCurrentTrack().then(processCurrenttrack, console.error);
    mopidy.playback.getTimePosition().then(processCurrentposition, console.error);
    mopidy.playback.getState().then(processPlaystate, console.error);

    mopidy.playback.getRepeat().then(processRepeat, console.error);
    mopidy.playback.getRandom().then(processRandom, console.error);

    mopidy.playback.getVolume().then(processVolume, console.error);
}

function locationHashChanged() {
    var hash = document.location.hash.split('?');
    //remove #
    var divid = hash[0].substr(1);
    var uri = hash[1];
    $('#navcurrent a').removeClass('ui-state-active ui-state-persist ui-btn-active');
    $('#navplaylists a').removeClass('ui-state-active ui-state-persist ui-btn-active');
    $('#navsearch a').removeClass('ui-state-active ui-state-persist ui-btn-active');
    //        alert(divid);
    switch(divid) {
        case 'current':
            $('#navcurrent a').addClass('ui-state-active ui-state-persist ui-btn-active');
            break;
        case 'playlists':
            $('#navplaylists a').addClass('ui-state-active ui-state-persist ui-btn-active');
            break;
        case 'search':
            $('#navsearch a').addClass($.mobile.activeBtnClass);
            $("#searchinput").focus();
            if (customTracklists['allresultscache'] == '') {
                initSearch($('#searchinput').val());
            }
            break;
        case 'artists':
            if (uri != '') {
                showArtist(uri);
            }
            break;
        case 'albums':
            if (uri != '') {
                showAlbum(uri);
            }
            break;
    }
    // Set the page title based on the hash.
    document.title = PROGRAM_NAME;
    $('.pane').hide();
    $('#' + divid + 'pane').show();
    return false;
}