var sciencedirect_suite = {
    url: 'http://www.sciencedirect.com/science/journal/03044211/36/1',
    //url: 'http://www.sciencedirect.com/science?_ob=DownloadURL&_method=finish&_acct=C000054237&_userid=1694017&_hubEid=1-s2.0-S0304421100X01344&count=0&md5=ee0b1e6f1c7cb9dc0fe92991ca599c15&JAVASCRIPT_ON=Y&format=cite-abs&citation-type=RIS&RETURN_URL=http%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Fhome&citation-tye=BIBTEX',
    noConflict: true,

    ready: function() {
        /* open up journal_ids.lst and read them in? construct urls. */

        //for serializing a form
        $.fn.serializeObject = function()
        {
            var o = {};
            var a = this.serializeArray();
            $.each(a, function() {
                if (o[this.name] !== undefined) {
                    if (!o[this.name].push) {
                        o[this.name] = [o[this.name]];
                    }
                    o[this.name].push(this.value || '');
                } else {
                    o[this.name] = this.value || '';
                }
            });
            return o;
        };

        _pjs.journal_volume_scraper = function(args) {
            var ssin = args[0];
            var page_title = $("title").text();
            var page_url = document.location.href;
            var journal_cover_url = "http://www.sciencedirect.com" + $($("[alt=\"About this Journal\"]")[0]).attr("src");
            var issue_display_data = $("#issueDisplayData").find("h2").text();
        
            //Volume 36, Issue 1, Pages 1-86 (1984)
            //Volume 36, Issue 1, Pages 1-86 (January 1984)
            
            //parse the volume number, edition number, dates, page numbers in issue_display_data
            var pieces = issue_display_data.split(",");
            var volume_number = pieces[0].split(" ")[1];
            var issue_number = pieces[1].substr(1).split(" ")[1];
            var page_numbers = pieces[2].substr(1).split(" ")[1];
            var issue_month = null;
            var issue_year = null;
            var issue_date = null;

            //this is probably broken?
            if (pieces[3] == "Issue") {
                issue_number = pieces[3];
                page_numbers = pieces[5];
            
                if (pieces[6] != "Pages" && pieces.length == 7 && pieces[7] != undefined && pieces[7] != null) {
                    issue_month = pieces[6].replace("(", "").replace(")", "");
                    issue_year = pieces[7].replace("(", "").replace(")", "");
                    issue_date = (pieces[6] + " " + pieces[7]);
                }
            }
        
            //before we attempt to download bibliographic data for this volume/edition
            var export_citation_candidates = $("[value=Export citations]");
            if (export_citation_candidates.length == 0) {
                return {"status": "error", "message": "unable to find an 'export citations' link on the current page", "url": page_url};
            }
        
            //grab and associate bibtex
            var prebibtex1_form = $("form[name=Tag]");

            //because i am too lazy to type up the form myself
            var prebibtex1_data = prebibtex1_form.serializeObject();

            //include some parameters so we know which item we're processig when we're on the next page
            prebibtex1_data["previous_url"]  = page_url;
            prebibtex1_data["xssin_id"]      = ssin;
            prebibtex1_data["xvolume_number"] = volume_number;
            prebibtex1_data["xissue_number"] = issue_number;
            prebibtex1_data["xissue_year"]   = issue_year;
            prebibtex1_data["xissue_month"]  = issue_month;
            prebibtex1_data["xpage_numbers"] = page_numbers;
            prebibtex1_data["xissue_display_data"] = issue_display_data;

            //this one is makes sciencedirect.com do what i want
            prebibtex1_data["export"] = "Export citations";
            
            //turn these into url params
            var prebibtex1_data1 = $.param(prebibtex1_data);
            
            var prebibtex_url = "http://www.sciencedirect.com/science?" + prebibtex1_data1;
            _pjs.urls.push(prebibtex_url);
        
            //check if there's a "previous issue" link and add the form target to _pjs.urls
            var prev_links = $("a[title=Previous volume/issue]")
            var prev_link  = null;
            if (prev_links.length > 0) {
                prev_link = "http://www.sciencedirect.com" + $(prev_links[0]).attr("href");
                //_pjs.urls.push(prev_link);
            }
        
            var returnable = {
                    "type": "issue_data",
                    "ssin": ssin,
                    "page_title": page_title,
                    "page_url": page_url,
        
                    "journal_cover_url": journal_cover_url, //journal cover image url
        
                    "issue_display_data": issue_display_data,
                    "issue_date": issue_date,
                    "volume_number": volume_number,
                    "issue_number": issue_number,
                    "page_numbers": page_numbers,
                    "issue_month": issue_month,
                    "issue_year": issue_year,

                    "prebibtex_url": prebibtex_url,
        
                    "prev_link": prev_link, //previous issue url
                   };
            console.log("JSON: " + JSON.stringify(returnable));
            return true; //returnable;
        }

        _pjs.urls = Array();
        return true;
    },

    moreUrls: function() {
        var more_urls = _pjs.urls;
        _pjs.urls = Array(); //this might not be necessary (it's probably blanked each time a page loads)
        return more_urls;
    },

    scrapers: {
        "http://www.sciencedirect.com/science/journal/:ssin/:volume/:edition": function() {
            var ssin = args[0];
            var volume = args[1];
            var edition = args[2];
            return _pjs.journal_volume_scraper(args);
        },
        "http://www.sciencedirect.com/science/journal/:ssin": function() {
            return _pjs.journal_volume_scraper(args);
        },
        /* this next one is for the pre-publication page */
        "http://www.sciencedirect.com/science?_ob=PublicationURL:stuff": function() {
            function getUrlVars() {
                var vars = [], hash;
                var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
                for(var i = 0; i < hashes.length; i++)
                {
                    hash = hashes[i].split('=');
                    vars.push(hash[0]);
                    vars[hash[0]] = hash[1];
                }
                return vars;
            }

            //get the page url from previous_url
            var page_vars    = getUrlVars();
            var previous_url = page_vars["previous_url"];
            var ssin         = page_vars["xssin_id"];
            var issue_number = page_vars["xissue_number"];
            var volume_number = page_vars["xvolume_number"];
            var issue_year   = page_vars["xissue_year"];
            var issue_month  = page_vars["xissue_month"];
            var page_numbers = page_vars["xpage_numbers"];
            var issue_display_data = page_vars["xissue_display_data"];

            //get the form
            var citeform       = $("form[name='exportCite']");
            var citeform_data  = citeform.serializeObject();

            //we want abstracts with our citations (or just "cite")
            citeform_data["format"] = "cite-abs";

            //BIBTEX, ASCII, REFWX, RIS
            citeform_data["citation-tye"] = "BIBTEX";
            
            //turn these into url params
            var citeform_data1 = $.param(citeform_data);
            
            //http://www.sciencedirect.com/science?_ob=DownloadURL&_method=finish&_acct=C000228598&_userid=10
            //&_hubEid=1-s2.0-S0304421100X01344&count=0&md5=b3a671de5390405eac6a1a884b1ebf1f
            //&JAVASCRIPT_ON=Y&format=cite&citation-type=RIS
            //&RETURN_URL=http%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Fhome
            var bibtex_url = "http://www.sciencedirect.com/science?" + citeform_data1;
            //_pjs.urls.push(bibtex_url);

            var bibtex_json = {
                "type": "bibtex_url",
                "url": bibtex_url,
                "ssin": ssin,
                "issue_number": issue_number,
                "volume_number": volume_number,
                "issue_year": issue_year,
                "issue_month": issue_month,
                "page_numbers": page_numbers,
                "issue_display_data": issue_display_data,
                "citeform_data": citeform_data1,
                "previous_url": previous_url,
                "cookies": document.cookie,
            };

            console.log("JSON: " + JSON.stringify(bibtex_json));

            return true; /*{"type": "citation_url",
                    "previous_url": previous_url,
                    "url": document.location,
                   }*/
        },
        //for downloading bibtex
        "http://www.sciencedirect.com/science?_ob=DownloadURL:stuff": function() {
            console.log("starting to download bibtex?");
        },
    },
};

pjs.addSuite(sciencedirect_suite);

pjs.config({
    //options: 'stdout', 'file' (set in config.logFile) or 'none'
    log: 'stdout',

    //options: 'json' or 'csv'
    format: 'json',

    //options: 'stdout' or 'file' (set in config.outFile)
    writer: 'file',
    outFile: 'output.json',
});