var AIRTIME = (function(AIRTIME) {
    var mod;

    if (AIRTIME.library === undefined) {
        AIRTIME.library = {};
    }

    mod = AIRTIME.library;

    mod.checkAddButton = function() {
        var selected = mod.getChosenItemsLength(), $cursor = $('tr.sb-selected'), check = false,
            shows = $('tr.sb-header'), current = $('tr.sb-current-show'),
        // TODO: this is an ugly way of doing this... we should find a more robust way of checking which view we're in.
            btnText = (window.location.href.toLowerCase().indexOf("schedule") > -1) ? $.i18n._('Add to show') : $.i18n._('Add to next show');

        // make sure library items are selected and a cursor is selected.
        if (selected !== 0) {
            check = true;
        }

        var sortable = $(".spl_sortable");
        if ($("#show_builder_table").is(":visible")) {
            if (shows.length === 0) {
                check = false;
            }

            if ($cursor.length !== 0) {
                btnText = $.i18n._('Add after selected items');
            } else if (current.length !== 0) {
                btnText = $.i18n._('Add to current show');
            }
        } else if (sortable.length > 0 && sortable.is(":visible")) {
            var objType = $('.active-tab .obj_type').val();
            if (objType === 'block') {
                btnText = $.i18n._('Add to current smart block');
            } else {
                btnText = $.i18n._('Add to current playlist');
            }
        } else {
            check = false;
        }

        if (check) {
            AIRTIME.button.enableButton("btn-group #library-plus", false);
        } else {
            AIRTIME.button.disableButton("btn-group #library-plus", false);
        }

        AIRTIME.library.changeAddButtonText($('.btn-group #library-plus #lib-plus-text'), btnText);
    };

    mod.fnRowCallback = function(nRow, aData, iDisplayIndex, iDisplayIndexFull) {
        var $nRow = $(nRow);

        if (aData.ftype === "audioclip") {
            $nRow.addClass("lib-audio");
            $image = $nRow.find('td.library_type');
            if (!isAudioSupported(aData.mime)) {
                $image.html('<span class="ui-icon ui-icon-locked"></span>');
                aData.image = '<span class="ui-icon ui-icon-locked"></span>';
            }
        } else if (aData.ftype === "stream") {
            $nRow.addClass("lib-stream");
        } else {
            $nRow.addClass("lib-pl");
        }

        $nRow.attr("id", aData["tr_id"]).data("aData", aData).data("screen",
            "timeline");
    };

    /**
     * Draw a placeholder for the given table to show if it has no data.
     *
     * @param {jQuery} table jQuery object containing the table DOM node
     */
    mod.drawEmptyPlaceholder = function (table) {
        var emptyRow = table.find('tr:has(td.dataTables_empty)'),
            wrapper = table.closest(".dataTables_wrapper");

        var libEmpty = wrapper.find('.empty_placeholder');
        if (emptyRow.length > 0) {
            emptyRow.hide();
            var mediaType = parseInt($('.media_type_selector.selected').data('selection-id')),
                img = wrapper.find('.empty_placeholder_image');
            if (isNaN(mediaType)) { return; }
            // Remove all classes for when we change between empty media types
            img.removeClass(function() { return $(this).attr("class"); });

            if (table[0] == AIRTIME.library.podcastEpisodeDataTable[0]) {
                img.addClass("empty_placeholder_image icon-white icon-th-list");
                wrapper.find('.empty_placeholder_text').html(
                    $.i18n._("This podcast doesn't have any episodes!")
                    + "<br/>" + $.i18n._("Make sure the RSS feed contains audio items (with enclosure tags).")
                    + "<br/><a target='_blank' href='http://www.apple.com/ca/itunes/podcasts/specs.html'>" + $.i18n._("Learn about podcasts") + "</a>"
                );
            } else {
                var opts = AIRTIME.library.placeholder(mediaType);
                img.addClass("empty_placeholder_image icon-white " + opts.icon);
                wrapper.find('.empty_placeholder_text').html(
                    $.i18n._("You haven't added any " + opts.media + ".")
                    + "<br/>" + $.i18n._(opts.subtext)
                    + "<br/><a target='_blank' href='" + opts.href + "'>" + $.i18n._("Learn about " + opts.media) + "</a>"
                );
            }

            libEmpty.show();
        } else {
            libEmpty.hide();
        }
    };

    mod.fnDrawCallback = function fnLibDrawCallback() {
        var table = $('#library_display'),
            cb = table.find('th[class*="checkbox"]');
        if (cb.find("input").length == 0) {
            cb.append("<input id='super-checkbox' type='checkbox'>");
        }

        mod.redrawChosen();
        mod.checkToolBarIcons();

        mod.drawEmptyPlaceholder(table);

        var sortable;

        if ($("#show_builder_table").is(":visible")) {
            sortable = "#show_builder_table";
        } else {
            sortable = ".active-tab .spl_sortable";
        }

        $('#library_display tr[class*="lib-"]')
            .draggable(
            {
                helper: function () {

                    var $el = $(this), selected = mod
                        .getChosenItemsLength(), container, thead = $("#show_builder_table thead"), colspan = thead
                        .find("th").length, width = $el.width(), message;

                    // dragging an element that has an unselected
                    // checkbox.
                    if (mod.isChosenItem($el) === false) {
                        selected++;
                    }

                    if (selected === 1) {
                        message = $.i18n._("Adding 1 Item");
                    } else {
                        message = sprintf($.i18n._("Adding %s Items"), selected);
                    }

                    container = $('<div/>').attr('id',
                        'draggingContainer').append('<tr/>')
                        .find("tr").append('<td/>').find("td")
                        .attr("colspan", colspan).width(width)
                        .addClass("ui-state-highlight").append(
                        message).end().end();

                    return container;
                },
                create: function(event, ui) {
                    $(this).draggable("option", "cursorAt", {
                        top: 20,
                        left: Math.floor($(this).outerWidth() / 2)
                    });
                },
                tolerance: 'pointer',
                cursor: 'move',
                distance: 25, // min-distance for dragging
                connectToSortable: sortable
            });
    };

    mod.dblClickAdd = function(data, type) {
        var i, length, temp, aMediaIds = [], aSchedIds = [], aData = [];

        if ($("#show_builder_table").is(":visible")) {
            // process selected files/playlists.
            aMediaIds.push({
                "id": data.id,
                "type": type
            });

            $("#show_builder_table tr.sb-selected").each(function (i, el) {
                aData.push($(el).data("aData"));
            });

            // process selected schedule rows to add media after.
            for (i = 0, length = aData.length; i < length; i++) {
                temp = aData[i];
                aSchedIds.push({
                    "id": temp.id,
                    "instance": temp.instance,
                    "timestamp": temp.timestamp
                });
            }

            if (aSchedIds.length == 0) {
                if (!addToCurrentOrNext(aSchedIds)) {
                    return;
                }
            }

            AIRTIME.showbuilder.fnAdd(aMediaIds, aSchedIds);
        } else {
            // process selected files/playlists.
            aMediaIds.push(new Array(data.id, data.ftype));

            // check if a playlist/block is open before adding items
            if ($('.active-tab .obj_type').val() == 'playlist'
                || $('.active-tab .obj_type').val() == 'block') {
                AIRTIME.playlist.fnAddItems(aMediaIds, undefined, 'after');
            }
        }
    };

    function addToCurrentOrNext(arr) {
        var el;
        // Add to the end of the current or next show by getting the footer
        el = $(".sb-footer.sb-future:first");
        var data = el.prev().data("aData");

        if (data === undefined) {
            alert($.i18n._("Cannot schedule outside a show.\nTry creating a show first."));
            return false;
        }

        arr.push({
            "id" : data.id,
            "instance" : data.instance,
            "timestamp" : data.timestamp
        });

        if (!isInView(el)) {
            $('.dataTables_scrolling.sb-padded').animate({
                scrollTop: el.offset().top
            }, 0);
        }

        return true;
    }

    mod.addToSchedule = function (selected) {
        console.log(selected);
        var aMediaIds = [], aSchedIds = [], aData = [];

        $.each(selected, function () {
            aMediaIds.push({
                "id": this.id,
                "type": this.ftype
            });
        });

        // process selected files/playlists.
        $("#show_builder_table").find("tr.sb-selected").each(function (i, el) {
            aData.push($(el).data("aData"));
        });

        // process selected schedule rows to add media after.
        $.each(aData, function () {
            aSchedIds.push({
                "id": this.id,
                "instance": this.instance,
                "timestamp": this.timestamp
            });
        });

        if (aSchedIds.length == 0) {
            if (!addToCurrentOrNext(aSchedIds)) {
                return;
            }
        }

        AIRTIME.showbuilder.fnAdd(aMediaIds, aSchedIds);
    };

    mod.setupLibraryToolbar = function() {
        var $toolbar = $(".lib-content .fg-toolbar:first");

        mod.createToolbarButtons();
        //mod.moveSearchBarToHeader();
        $("#advanced_search").click(function(e) {
            e.stopPropagation();
        });

        if (localStorage.getItem('user-type') != 'G') {
            $toolbar.append($menu);
            // add to timeline button
            $toolbar
                .find('#library-plus')
                .click(
                function () {

                    if (AIRTIME.button.isDisabled('btn-group #library-plus') === true) {
                        return;
                    }

                    var selected = AIRTIME.library.getSelectedData(), aMediaIds = [];

                    if ($("#show_builder_table").is(":visible")) {
                        mod.addToSchedule(selected);
                    } else {
                        $.each(selected, function () {
                            aMediaIds.push([this.id, this.ftype]);
                        });

                        // check if a playlist/block is open before adding items
                        if ($('.active-tab .obj_type').val() == 'playlist'
                            || $('.active-tab .obj_type').val() == 'block') {
                            AIRTIME.playlist.fnAddItems(aMediaIds, undefined, 'after');
                        }
                    }
                });

            $toolbar.find('#publish-btn').click(function () {
                if (AIRTIME.button.isDisabled('btn-group #publish-btn') === true) {
                    return;
                }

                var selected = $(".lib-selected");

                selected.each(function (i, el) {
                    var data = $(el).data("aData");
                    AIRTIME.publish.openPublishDialog(data.id);
                });
            });

            // delete from library.
            $toolbar.find('#sb-delete').click(function () {
                if (AIRTIME.button.isDisabled('btn-group #sb-delete') === true) {
                    return;
                }

                AIRTIME.library.fnDeleteSelectedItems();
            });

            $toolbar.find('#sb-new').click(function () {
                if (AIRTIME.button.isDisabled('btn-group #sb-new') === true) {
                    return;
                }

                var selection = $(".media_type_selector.selected").data("selection-id");

                if (selection == AIRTIME.library.MediaTypeIntegerEnum.PLAYLIST) {
                    AIRTIME.playlist.fnNew();
                } else if (selection == AIRTIME.library.MediaTypeIntegerEnum.BLOCK) {
                    AIRTIME.playlist.fnNewBlock();
                } else if (selection == AIRTIME.library.MediaTypeIntegerEnum.WEBSTREAM) {
                    AIRTIME.playlist.fnWsNew();
                }
            });


            $toolbar.find('#sb-edit').click(function () {
                if (AIRTIME.button.isDisabled('btn-group #sb-edit') === true) {
                    return;
                }

                var selected = $(".lib-selected");

                selected.each(function (i, el) {
                    var data = $(el).data("aData");

                    if (data.ftype === "audioclip") {
                        $.get(baseUrl + "library/edit-file-md/id/" + data.id, {format: "json"}, function (json) {
                            AIRTIME.playlist.fileMdEdit(json, data.tr_id);
                            //buildEditMetadataDialog(json);
                        });
                    } else if (data.ftype === "playlist" || data.ftype === "block") {
                        AIRTIME.playlist.fnEdit(data, baseUrl + 'playlist/edit');
                        AIRTIME.playlist.validatePlaylistElements();
                    } else if (data.ftype === "stream") {
                        AIRTIME.playlist.fnEdit(data, baseUrl + 'webstream/edit');
                    }
                });
            });

            mod.createToolbarDropDown();
        }
    };

    return AIRTIME;

}(AIRTIME || {}));