(function ($, H5AI) {

    H5AI.connector = (function () {

        var cache = {},
            pathnameStatusCache = {},
            contentTypeRegEx = /^text\/html;h5ai=/,
            getPath = function (folder, tableRow) {

                var absHref = H5AI.util.getAbsHref(folder, tableRow),
                    path = cache[absHref];

                if (!path) {
                    path = H5AI.Path(folder, tableRow);
                    if (!path.isParentFolder) {
                        cache[path.absHref] = path;
                    }
                }

                return path;
            },
            fetchStatus = function (pathname, callback) {

                if (H5AI.core.settings.folderStatus[pathname]) {
                    callback(H5AI.core.settings.folderStatus[pathname]);
                    return;
                } else if (pathnameStatusCache[pathname]) {
                    callback(pathnameStatusCache[pathname]);
                    return;
                }

                $.ajax({
                    url: pathname,
                    type: "HEAD",
                    complete: function (xhr) {

                        var status = xhr.status;

                        if (status === 200 && contentTypeRegEx.test(xhr.getResponseHeader("Content-Type"))) {
                            status = "h5ai";
                        }
                        pathnameStatusCache[pathname] = status;
                        callback(status);
                    }
                });
            },
            updatePath = function (path) {

                if (path.isFolder && !path.isParentFolder && path.status === undefined) {
                    fetchStatus(path.absHref, function (status) {

                        if (status !== "h5ai") {
                            path.status = status;
                        }
                        H5AI.html.updateHtml(path);
                        H5AI.core.linkHoverStates();
                    });
                }
            },
            updatePaths = function () {

                $.each(cache, function (ref, cached) {
                    updatePath(cached);
                });
            },
            fetchStatusAndContent = function (pathname, includeParent, callback) {

                fetchStatus(pathname, function (status) {

                    if (status !== "h5ai") {
                        callback(status, {});
                        return;
                    }

                    $.ajax({
                        url: pathname,
                        type: "GET",
                        dataType: "html",
                        error: function (xhr) {

                            callback(xhr.status, {}); // since it was checked before this should never happen
                        },
                        success: function (html, status, xhr) {

                            var content = {};

                            if (!contentTypeRegEx.test(xhr.getResponseHeader("Content-Type"))) {
                                callback(xhr.status, {}); // since it was checked before this should never happen
                                return;
                            }

                            $(html).find("#table td").closest("tr").each(function () {

                                var path = getPath(pathname, this);

                                if (path.isFolder && (!path.isParentFolder || includeParent)) {
                                    content[path.absHref] = path;
                                    updatePath(path);
                                }
                            });
                            callback("h5ai", content);
                        }
                    });
                });
            };

        return {
            getPath: getPath,
            updatePaths: updatePaths,
            fetchStatusAndContent: fetchStatusAndContent
        };
    }());

}(jQuery, H5AI));