var path = require('path');
var set = require('./config/set');
var uuid    = require('uuid/v4');
var logger = require('./config/logger').getLogger("util.js");
var Image = require('canvas').Image;
var fs = require('fs');
var queryString = require("query-string");
var http = require("http-request");

var getPath = function () {
    var outPath = "";
    if (arguments.length == 0) {
        return outPath;
    }
    outPath = outPath.concat(__dirname);
    for (var i = 0; i < arguments.length; i++) {
        outPath = path.join(outPath, arguments[i]);
    }
    return outPath;
};

var platforms = ["pc", "mobile", "wechat", "qq"];
var stockCities = ["北京,", "上海,", "广州,", "成都,", "深圳,", "南宁,", "武汉,", "天津,", "南京,", "西安"];

var HttpStatus = {
    OK: 200,
    LOGIC_INTERRUPT: 422,
    NOT_FOUND: 404,
    ERROR: 500
};

var currency = {
    CN: "￥#",
    US: "$#",
    JP: "￥#"
};

var getImageName = function() {
    return getPath(set.imageOutPath, set.tempResourcePath, uuid() + '.jpeg');
};

var getSelfUrl = function (vendor, id) {
    return set.settings.selfUrlFormat.replace("$vendor", vendor).replace("$id", id);
};

var getSourceImageByName = function (imageName) {
    var sourceImage = new Image;
    sourceImage.src = fs.readFileSync(path.isAbsolute(imageName) ? imageName : getPath(set.sourcePath, imageName));
    return sourceImage;
};

var httpRender = function (code, message, data, res) {
    console.log(code, message, data, res);
    res.send({
        code: code,
        message: message,
        data: data
    });
};

var formatPriceWithCurrency = function (price, locale) {
    if (locale) {
        return currency[locale].replace("#", (price / 100.0).toFixed(2));
    } else {
        return (price / 100.0).toFixed(2);
    }
};

var getCheapestPlatformAndPrice = function (platformPrices, locale) {
    if (!platformPrices || platformPrices.length == 0) {
        return {};
    }
    var minPricePlatform = platformPrices[0];
    var minPrice = minPricePlatform.price;
    for (var i = 1; i < platformPrices.length; i++) {
        if (platformPrices[i].price < minPrice) {
            minPricePlatform = platformPrices[i];
        }
    }
    return minPricePlatform;
};

var getPlatformIcons = function (minPricePlatform) {
    var outImages = [];
    for (var i = 0; i < platforms.length; i++) {
        var nameAfterfix = platforms[i] === minPricePlatform.toLowerCase() ? "_suff.png" : "_lack.png";
        outImages.push(getSourceImageByName(platforms[i].concat(nameAfterfix)));
    }
    return outImages;
};

var getMinPriceOptions = function (minPrice, promotionStr, vendorId) {
    var reqBody = {
        price: minPrice,
        promotionStr: promotionStr,
        vendorId: vendorId
    };

    reqBody = queryString.stringify(reqBody);
    return {
        url: "http://rest.ijiechao.com:6060/product/minPrice.do",
        reqBody: new Buffer(reqBody),
        headers: {
            'content-type': 'application/x-www-form-urlencoded;charset=utf-8'
        }
    };
};

exports.getImageName = getImageName;
exports.getSelfUrl = getSelfUrl;
exports.getSourceImageByName = getSourceImageByName;
exports.HttpStatus = HttpStatus;
exports.httpRender = httpRender;
exports.getCheapestPlatformAndPrice = getCheapestPlatformAndPrice;
exports.getPlatformIcons = getPlatformIcons;
exports.getMinPriceOptions = getMinPriceOptions;
exports.formatPriceWithCurrency = formatPriceWithCurrency;
exports.inStockCities = stockCities;