var lfmImporter = function() {

	var lfmi = null;
    var offset = prefs.lfm_importer_start_offset;
    var alloffset = 0;
    var alldata = new Array();
    var limit = 25;
    var row;
	var tracksdone = 0;
	var totaltracks;
	var starttime;

    function getNextChunk() {
        $.ajax({
        	url: 'plugins/code/lfmimporter.php',
        	type: "POST",
        	data: {action: 'getchunk', offset: offset, limit: limit},
        	dataType: 'json'
		})
        .done(putTracks)
        .fail(function() {
    		infobar.error(language.gettext('label_general_error'));
        });
    }

    function putTracks(data) {
		alldata = data;
		alloffset = 0;
        if (data.length > 0) {
			$('#lfmitable tr:not(:first-child)').remove();
            debug.log("LFMIMPORTER","Got data",data);
            for (var i in data) {
                var tr = $('<tr>', {name: data[i].TTindex}).appendTo('#lfmitable');
                tr.append('<td class="playlistinfo underline" name="albumartist">'+data[i].Albumartist+'</td>');
                tr.append('<td class="playlistinfo underline" name="Album">'+data[i].Albumname+'</td>');
                tr.append('<td class="playlistinfo underline" name="Title">'+data[i].Title+'</td>');
                tr.append('<td class="playlistinfo invisible" name="trackartist">'+data[i].Trackartist+'</td>');
                tr.append('<td class="playlistinfo invisible" name="Track">'+data[i].TrackNo+'</td>');
                tr.append('<td class="playlistinfo invisible" name="Disc">'+data[i].Disc+'</td>');
                tr.append('<td class="underline" name="playcount">'+data[i].Playcount+'</td>');
                tr.append('<td class="underline" name="lastfmplaycount"></td>');
                tr.append('<td class="underline" name="tick"></td>');
            }
            offset += limit;
            getNextRow();
        } else {
            debug.log("LFMIMPORTER","Got all data");
			metaHandlers.resetSyncCounts();
        }
    }

    function getNextRow() {
        var data = cloneObject(alldata[alloffset]);
        lastfm.track.getInfo( { artist: data.Albumartist, track: data.Title },
                                lfmResponseHandler,
                                lfmResponseHandler,
                                alloffset);

        alloffset++;
    }

    function lfmResponseHandler(data, reqid) {
        var de = new lfmDataExtractor(data.track);
        var trackdata = de.getCheckedData('track');
        de = new lfmDataExtractor(trackdata);
        debug.trace("LFMIMPORTER","Playcount for",reqid,"is",alldata[reqid].Playcount, de.userplaycount());
        row = $('#lfmitable').children('tr[name="'+alldata[reqid].TTindex+'"]');
        row.children('td[name="lastfmplaycount"]').html(de.userplaycount());
        if (parseInt(alldata[reqid].Playcount) < parseInt(de.userplaycount())) {
            debug.mark("LFMIMPORTER","Incrementing Playcount for",alldata[reqid].TTindex,"to",de.userplaycount());
            var playlistinfo = {type: 'local', location: ''};
            $.each(row.children('td.playlistinfo'), function() {
                playlistinfo[$(this).attr('name')] = htmlspecialchars_decode($(this).html());
            });
            debug.trace("LFMIMPORTER","Using data",playlistinfo);
            metaHandlers.fromPlaylistInfo.setMeta(playlistinfo, 'inc', [{attribute: 'Playcount', value: de.userplaycount()}], setSuccess, setFail);
        } else {
            row.children('td[name="tick"]').html('<i class="icon-block collectionicon"></i>');
            doNext();
        }
    }

    function setSuccess() {
        debug.log("LFMIMPORTER","Success");
        row.children('td[name="tick"]').html('<i class="icon-tick collectionicon"></i>');
        doNext();
    }

    function setFail() {
        debug.warn("LFMIMPORTER","Fail");
        row.children('td[name="tick"]').html('<i class="dialog-error collectionicon"></i>');
        doNext();
    }

    function doNext() {
		tracksdone++;
		$('#lfmiprogress').rangechooser("setRange", {min: 0, max: tracksdone+prefs.lfm_importer_start_offset});
		var elapsed = Date.now() - starttime;
		var remaining = (elapsed/tracksdone) * (totaltracks - tracksdone - prefs.lfm_importer_start_offset);
		$('#lfmiinfo').html(language.gettext('importer_status', [tracksdone+prefs.lfm_importer_start_offset, totaltracks, formatTimeString(elapsed/1000), formatTimeString(remaining/1000)]));
        if (alloffset < alldata.length) {
            getNextRow();
        } else {
            getNextChunk();
        }
    }

	function getTotalTracks() {
		$.ajax({
        	url: 'plugins/code/lfmimporter.php',
        	type: "POST",
        	data: {action: 'gettotal'},
        	dataType: 'json'
		})
        .done(function(data) {
			totaltracks = data.total;
			if (totaltracks > 0) {
				$("#lfmiprogress").rangechooser({
					range: data.total,
					interactive: false,
	                startmax: 0,
	            });
				starttime = Date.now();
				getNextChunk();
			} else {
				$('#lfmitable').remove();
				$('#lfmimunger').append('<div class="textcentre fullwidth"><h3>'+language.gettext('label_lfm_nonew', [new Date(prefs.lfm_importer_last_import * 1000).toLocaleString()])+'</h3></div>');
			}
    	})
        .fail(function() {
    		infobar.error(language.gettext('label_general_error'));
        });
	}

	return {

		open: function() {

        	if (lfmi == null) {
	        	lfmi = browser.registerExtraPlugin("lfmi", language.gettext("label_lfm_playcountimporter"), lfmImporter, 'https://fatg3erman.github.io/RompR/Using-Saved-Playlists#editing-your-saved-playlists');
			    $("#lfmifoldup").append('<div class="noselection fullwidth" id="lfmimunger"></div>');
				$("#lfmimunger").append('<div style="height:1em;max-width:80%;margin:auto" id="lfmiprogress"></div>');
				$("#lfmimunger").append('<div style="padding:4px;max-width:80%;margin:auto;text-align:center;font-size:80%;margin-bottom:1em" id="lfmiinfo"></div>');
				$("#lfmimunger").append('<table id="lfmitable"></table>');
				if (lastfm.isLoggedIn()) {
                	$('#lfmitable').append('<tr><th>Artist</th><th>'+language.gettext('label_album')+'</th><th>'+language.gettext('label_track')+'</th>th class="invisible"></th><th class="invisible"></th><th class="invisible"></th><th>'+language.gettext('label_playcount')+'</th><th>'+language.gettext('label_lfm_playcount')+'</th><th></th></tr>');
					getTotalTracks();
				} else {
					$('#lfmimunger').append('<div  class="textcentre"><h3>'+language.gettext('label_mustlogintolfm')+'</h3></div>');
				}
				lfmi.slideToggle('fast');
	        } else {
	        	browser.goToPlugin("lfmi");
	        }
		},

		handleClick: function(element, event) {
		},

		close: function() {
			lfmi = null;
			offset = 0;
            alldata = new Array();
            alloffset = 0;
			tracksdone = 0;
		}

	}

}();

pluginManager.setAction(language.gettext("label_lfm_playcountimporter"), lfmImporter.open);
lfmImporter.open();