/**
 * @function
 * @description Gets all Bookmarks from Chrome Bookmark repository
 * @param  object window
 * @return string
 */
;(function (window) {
    try {        
        var bookmarks, output;

        if (window.chrome === void 0 || window.chrome.bookmarks === void 0) {
            throw new Error("Chrome Object is not available.");
        }
                
        chrome.bookmarks.getTree(fetchFromTree);

        window.copy(global.bookmarks);
    } catch (e) {
        console.log(e);
    }

    /**
     * @function
     * @description
     * @param  object tree
     * @return undefined
     */
    function fetchFromTree(tree) {
        var url = document.createElement('a');
        var urls = {};
        var count = 0;
        var subTrees = tree[0].children;
        var crawler = function getBookmarks(subTree) {
            if (subTree.children) {
                return getBookmarks(subTree.children);
            } else {
                subTree.forEach(
                    function (item) {
                        if (!item.url) {
                            return getBookmarks(item);
                        } else {
                            url.href = item.url;
                            var domain = url.protocol + "//" + url.host;

                            if (urls[domain]) {
                                if (urls[domain].indexOf(item.url) === -1) {
                                    urls[domain].push(item.url);
                                }
                            } else {
                                urls[domain] = [item.url];
                            }

                            //console.log( item.url );
                            count++; 
                        }
                    }
                );
            }
        };

        subTrees.forEach(crawler);
        global.bookmarks = getSQLiteInsertRows(urls);
        //console.log(count);
        //console.log(urls);
        //console.log(getSQLiteInsertRows(urls));
    }

    //@ToDo Export URLs to SQL(ite) INSERTs
    function getSQLiteInsertRows(tree) {
        var transactionStr =  '';

        for (item in tree) {
            tree[item].forEach(
                function (item) {
                	//@ToDo escape double-quotes ""
                    transactionStr += 'INSERT OR FAIL INTO bookmark (dateAdded,url) VALUES( (SELECT strftime(\'%s\',\'now\')),'+'\"'+item.replace(/"/g,'\\"')+'\"'+'); \n';
                }
            );
        }

        return transactionStr;
    }

    function getCSV(bookmarks) {
        bookmarks.forEach(
            function (bookmark) {
                output += '("'+bookmark.url.replace(/"/g,'\"')+'"),\n';
            }
        );

        return output.replace(/,+$/g, "");
    }
})(window);