var async = require('async');
var request = require('request');
var cheerio = require('cheerio');
var User = require('../app/models/user');
var csv = require('./csv');
 
require('../config/vars');
 
function getPrice(priceStr){
    var priceRg = /(?:-|\.|,|\d)*$/ig;
    var res = priceRg.exec(priceStr);
    var price = parseFloat(res[0]);
    price = price?price:0;
    return price;
}
 
exports.scrapAmazonItems = function(req, checkboxes, ebayData, callback) {
 
    // Get user settings
    var paypalEmail = "";
    var postcode = "";
    var ebayCountry = "";
 
    User.findOne({
        _id: req.user._id
    }, function(err, user) {
        if (!err) {
            paypalEmail = user.local.settings.paypalEmail;
            postcode = user.local.settings.zip;
            ebayCountry = user.local.settings.ebayCountry;
        }
    });
 
 
    var list = [];
    async.forEach(checkboxes, function(item, callback) { //The second argument (callback) is the "task callback" for a specific messageId
       
        // If item (URL) is undefined, ignore this loop
        if (typeof item === undefined) {
            callback();
        }
 
        var url = item;
        // var newURL = url.replace(/\/dp\//, "/dp/a/");
        var newURL = url;
        console.log("url", newURL);
        var newEbay = JSON.parse(ebayData[item]);
 
        // images
        //var re = /"large":"([^"]*)"/g;
        var testRe = /http:\/\/ecx\.images\-amazon\.com\/images\/I/ig;
        var reHiRes = /"hiRes":"(.*?)"|"hiRes":()null/ig;
        var reLarge = /"large":"(.*?)"|"large":()null/ig;
        // var re = /<div id="thumb_image_.*?" class="thumb.*?"><img alt="" src="(http:\/\/ecx\.images-amazon\.com\/images\/I\/.*?)"><\/div>/ig;
        // end images
 
        request(newURL, function(err, response, html) {
 
            console.log("newURL", newURL);
 
            if (err) {
                console.log(err)
            } else {
                var $ = cheerio.load(html);
 
                // images
                var imgs = [];
                /*while(true){
                    var res = re.exec(html);
                    if(!res){
                        break;
                    }
                    if(res[1]){
                        var img = res[1].replace(/\.[^\.]*?\.jpg/i,"._SL500_.jpg");
                        imgs.push(img);
                    }
                }
                console.log("----- Images ----: ");
                console.log(imgs);*/
 
                $('script').each(function(index, el) {
                    var js = $(this).text();
                    if(testRe.test(js)){
                        // find hires images
                        var hiresImgs = [];
                        while(true){
                            var res = reHiRes.exec(js);
                            console.log(res);
                            if(!res){
                                break;
                            }
                            hiresImgs.push(res[1] || res[2]);
                        }
                        // find large images
                        var largeImgs = [];
                        while(true){
                            var res = reLarge.exec(js);
                            if(!res){
                                break;
                            }
                            largeImgs.push(res[1] || res[2]);
                        }
 
                        // merge image, hires higher priority
                        for(var i=0;i<hiresImgs.length;i++){
                            if(hiresImgs[i]){
                                imgs.push(hiresImgs[i]);
                            }else if(largeImgs[i]){
                                imgs.push(largeImgs[i]);
                            }
                        }
                        return ;
                    }
                });
                console.log("images", imgs);
                // end images
 
                // Remove images
                $('.leftImage').remove();
                $('.rightImage').remove();
 
                // Remove seeAll link
                $('div.seeAll').remove();
 
                // Remove duplicate product description
                $('h3.productDescriptionSource').remove();
 
                var d = $('#btAsinTitle').children().text();
                var l = $('.priceLarge').text();
                var j = {};
                $('#thumbs-image a').each(function() {
                    j[$(this).children().attr('src')] = []
                });
                var p = $('#technicalProductFeaturesATF').children('ul').html();
 
                var s = $('#productDescription').html();
 
                if (!d) {
                    d = $("#productTitle").text();
                    l = $("#priceblock_ourprice").text();
                    // j = JSON.parse($("#imgTagWrapperId").children().attr('data-a-dynamic-image'));
                    j = imgs[0];
                    p = $('#feature-bullets').children('ul').html() ? $('#feature-bullets').children('ul').html() : $('#feature-bullets').children().children().html();
                    //s = $(".techD").html();
                    // get product description
 
                    var iframeRg = /var iframeContent = "(.*?)";/ig;
                    var iframeRs = iframeRg.exec(html);
                    if(iframeRs && iframeRs[1]){
                        var iframeContent = decodeURIComponent(iframeRs[1]);
                       
                        var $desc = cheerio.load(iframeContent);
 
                        // Remove seeAll link
                        $desc('div.seeAll').remove();
 
                        // Remove duplicate product description
                        $desc('h3.productDescriptionSource').remove();
                       
                        //s = $desc('#productDescription').html();
                        s = $desc('#productDescription div.productDescriptionWrapper').html();
                    }else{
                        s = $('#productDescription div.productDescriptionWrapper').html();
                    }
                }
 
                s.replace(/(\r\n|\n|\r)/gm,"");
 
                // Replace non-alpha numeric characters from title with a space
                d = d.replace(/([^0-9A-Za-z\.\s]+)/g, '').replace(/(\s\s)/, '').trim();
 
                p = p ? '"' + p.replace(/\n/g, '').replace(/\t/g, '&nbsp; &nbsp; &nbsp; &nbsp;') + '"' : '';
                l = l.replace('�', '£');
               
                // Replace new lines
                s = s ? s.replace(/\n/g, '') : '';
 
                var countries = req.app.locals.ebayCountries;
                var ebaySiteID = '';
                //console.log("countries", countries);
 
                for (index in countries) {
                    ///console.log("ebayCountry", ebayCountry);
                    if (countries[index].value === ebayCountry) {
                        //console.log("match found - " + countries[index].ebaySiteID);
                        ebaySiteID = countries[index].ebaySiteID;
                        ebayCurrency = countries[index].ebayCurrency;
                        ebayCountryText = countries[index].ebayCountry;
                    }
                    //console.log(countries[index].label);
                }
 
                var n = {
                    d: d,
                    l: l,
                    j: j,
                    p: p,
                    s: s,
                    url: url,
                    postcode: postcode,
                    paypalEmail: paypalEmail,
                    ebaySiteID: ebaySiteID,
                    ebayCurrency: ebayCurrency,
                    ebayPrice: newEbay.eprice
                };
                list.push(n);
 
            }
            callback();
        });
    }, function(err) { //This is the final callback
        csv.createCSV(list, callback);
    });
}
 
 
exports.scrapAmazonList = function(req, list, options, callback) {
 
    var profitFrom = parseFloat(req.body.profitFrom);
    var profitTo = parseFloat(req.body.profitTo);
 
    // Get user settings
    var paypalFees = 0;
    var eBayFees = 0;
 
    User.findOne({
        _id: req.user._id
    }, function(err, user) {
        //console.log("user findone");
        if (!err) {
 
            paypalFees = user.local.settings.paypalFee;
            eBayFees = user.local.settings.ebayListingFee;
        }
    });
 
    var i = 0;
    var newList = [];
    list = list.slice(0,20); // for fast test
/*    console.log("list.length");
    console.log(list.length);*/
    console.log("list length", list.length)
    async.forEach(list, function(item, callback) { //The second argument (callback) is the "task callback" for a specific messageId
 
        var amazonURL = getAmazonURL(req.session.ebayCountry);
        var url = amazonURL + 's/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=' + item.text;
        i++;
 
        request(url, function(err, response, html) {
 
            if (err) {
                console.log("error")
                callback(err);
            } else {
                console.log("else");
                var $ = cheerio.load(html);
 
                item.amazonTitle = $("#result_0 .bold").html();
                item.amazonPrice = $("#result_0 .red").html();
                item.aprice = item.amazonPrice ? parseFloat(item.amazonPrice.replace(/^\D+/g, '')) : 0;
                item.eprice = item.price ? parseFloat(item.price.replace(/^\D+/g, '')) : 0;
                item.aurl = $("#result_0 .newaps").children().attr('href');
 
                var paypalFeesAsPercentage = (parseFloat(paypalFees) / 100);
 
                //console.log("price", item.price);
                //console.log("eprice", item.eprice);
 
                item.paypalFees = Math.round((parseFloat(item.eprice) * paypalFeesAsPercentage) * 100) / 100;
                item.ebayFees = Math.round(((parseFloat(item.eprice) / 10) + parseFloat(eBayFees)) * 100) / 100;
                // item.profit1 = Math.round(((parseFloat(item.eprice) - (item.paypalFees + item.ebayFees)) - parseFloat(item.aprice)) * 100) / 100;
                /*console.log("---------------- 1111111 --------------");
                console.log(item.eprice);
                console.log(item.paypalFees);
                console.log(item.ebayFees);
                console.log(item.aprice);
                console.log("---------------- 2222222 --------------");
                console.log(parseFloat(item.eprice));
                console.log(item.paypalFees + item.ebayFees);
                console.log(getPrice(item.aprice));*/
 
                item.profit = Math.round(((parseFloat(item.eprice) - (item.paypalFees + item.ebayFees)) - getPrice(item.aprice)) * 100) / 100;
 
                var currencySymbol = '';
                var countries = req.app.locals.ebayCountries;
                for(var i=0;i<countries.length;i++){
                    if(countries[i].value == req.body.ebayCountry){
                        currencySymbol = countries[i]['currencySymbol'];
                    }
                }
 
                item.paypalFees = currencySymbol + item.paypalFees.toFixed(2);
                item.ebayFees = currencySymbol + item.ebayFees.toFixed(2);
                var profit = item.profit.toFixed(2);
                item.profit = currencySymbol + item.profit.toFixed(2);
                item.ebayData = JSON.stringify(item);
 
                // If searching for all items OR
                if (options.listingsType == "all" || (options.listingsType != "all" && profit > 0.1)) {
                    //console.log("item", item);
                    newList.push(item);
                }
 
            }
            console.log("calling callback " + i)
 
            callback();
            console.log("here");
        });
       
    }, function(err) { //This is the final callback
        if (err) return callback(err, null);
        console.log("entering final callback");
        // filter list
        var resultList = [];
        for(var i=0;i<newList.length;i++){
            var priceRg = /(?:-|\.|,|\d)*$/ig;
            var res = priceRg.exec(newList[i].profit);
            var profit = parseFloat(res[0]);
            if(profitFrom != "" && profit < profitFrom){
                continue;
            }
            if(profitTo != "" && profit > profitTo){
                continue;
            }
            resultList.push(newList[i]);
        }
 
        console.log("calling final callback")
        callback(err, resultList);
    });
}
 
function getAmazonURL(country) {
 
    var url = '';
 
    switch (country) {
        case 'at':
            url = 'http://www.amazon.at/';
            break;
        case 'ca':
            url = 'http://www.amazon.ca/';
            break;
        case 'fr':
            url = 'http://www.amazon.fr/';
            break;
        case 'it':
            url = 'http://www.amazon.it/';
            break;
        case 'es':
            url = 'http://www.amazon.es/';
            break;
        case 'de':
            url = 'http://www.amazon.de/';
            break;
        case 'us':
            url = 'http://www.amazon.com/';
            break;
        default:
            url = 'http://www.amazon.co.uk/';
            break;
    }
 
    return url;
}