'use strict';

const url = require('url');
const _ = require('lodash');
const config = require('../config/common');
const assetUrl = config.assetUrl;

module.exports = {
    imgSrc: function(imgSrc) {
        return url.resolve(assetUrl, imgSrc);
    },
    image2: function(imageUrl, opts) {
        if (imageUrl && _.isString(imageUrl)) {
            let params = opts.hash;
            let urls = imageUrl.split('?');
            let query = urls[1] || '';
            let uri = urls[0];

            if (uri.indexOf('http:') === 0) {
                uri = uri.replace('http:', '');
            }

            if (query) {
                query = query.replace(/{width}/g, params.w).replace(/{height}/g, params.h).replace(/{mode}/g, (params.mode || 2));

                if (query.indexOf('imageView2') === 0) {
                    if (params.q && query.indexOf('/q/') > 0) {
                        query = query.replace(/\/q\/\d+/g, '/q/' + params.q);
                    } else if (params.q) {
                        query += '/q/' + params.q;
                    }
                } else if (query.indexOf('imageMogr2') === 0) {
                    if (params.q && query.indexOf('/quality/') > 0) {
                        query = query.replace(/\/quality\/\d+/g, '/quality/' + params.q);
                    } else if (params.q) {
                        query += '/quality/' + params.q;
                    }
                } else if (query.indexOf('imageView/') === 0) {
                    if (params.q && query.indexOf('/q/') > 0) {
                        query = query.replace(/\/q\/\d+/g, '/q/' + params.q);
                    } else if (params.q) {
                        query += '/q/' + params.q;
                    }

                    if (params.mode) {
                        query = query.replace(/imageView\/\d{1}\//, 'imageView/' + params.mode + '/');
                    }
                }
            } else {
                query = 'imageView2/2/interlace/1/q/' + (params.q || 75);
            }
            return uri + '?' + query;
        } else {
            return '';
        }
    },
    ifor: function() {
        var args = Array.prototype.slice.call(arguments);
        var opt = args[args.length - 1];
        var isTrue = false;

        for (var i = 0; i < args.length - 1; i++) {
            if (args[i]) {
                isTrue = true;
                break;
            }
        }

        if (isTrue) {
            return opt.fn(this);
        } else {
            return opt.inverse(this);
        }
    },

    /**
     * 小于某zhi
     *
     * @param variable
     * @param number
     */
    within: function(variable, number, opt) {
        if (variable < number) {
            return opt.fn(this);
        } else {
            return opt.inverse(this);
        }
    },
    eq: function(a, b, options) {
        if (arguments.length === 2) {
            options = b;
            b = options.hash.compare;
        }
        if (a === b) {
            return options.fn(this);
        }
        return options.inverse(this);
    },
    goodsUrl: (product, kind) => {
        let productId, goodsId, cnAlphabet;

        switch (kind) {
            case 'collection':
                productId = product.productId;
                goodsId = product.goodsId;
                cnAlphabet = product.cnAlphabet;
                break;
            default:
                productId = product.productId;
                goodsId = product.goodsList[0].goodsId;
                cnAlphabet = product.cnAlphabet;
        }

        return `/product/pro_${productId}_${goodsId}/${cnAlphabet}.html`;
    },
    toFixed: (value, num) => {
        if (typeof value === 'undefined') {
            return;
        }
        return Number(value).toFixed(num || 2);
    },
    resizeImage: (src, width, height, mode) => {
        return src ? src.replace(/(\{width}|\{height}|\{mode})/g, function($0) {
            const dict = {
                '{width}': width || 300,
                '{height}': height || 300,
                '{mode}': mode || 2
            };

            return dict[$0];
        }).replace(/https?:/, '') + '/interlace/1' : '';
    }
};