'use strict'

//获取应用实例

/** 
 * 时间戳转化为年 月 日 时 分 秒 
 * time: 传入时间戳
 * format：返回格式，支持自定义，但参数必须与formateArr里保持一致 
 * formatTimeByDefined(1488481383,'Y/M/D h:m:s') => 2017/03/03 03:03:03
*/
function formatTimeByDefined(time, format) {

  var formateArr = ['Y', 'M', 'D', 'h', 'm', 's'];
  var returnArr = [];

  var date = new Date(time * 1000);
  returnArr.push(date.getFullYear());
  returnArr.push(formatNumber(date.getMonth() + 1));
  returnArr.push(formatNumber(date.getDate()));

  returnArr.push(formatNumber(date.getHours()));
  returnArr.push(formatNumber(date.getMinutes()));
  returnArr.push(formatNumber(date.getSeconds()));

  for (var i in returnArr) {
    format = format.replace(formateArr[i], returnArr[i]);
  }
  return format;
}  

function formatTime(date) {
  var year = date.getFullYear()
  var month = date.getMonth() + 1
  var day = date.getDate()

  var hour = date.getHours()
  var minute = date.getMinutes()
  var second = date.getSeconds()

  return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':')
}

function formatNumber(n) {
  n = n.toString()
  return n[1] ? n : '0' + n
}

function getDeviceInfo(wx) {
    let res = wx.getSystemInfoSync(),
        windowWidth;

    windowWidth = res.windowWidth;
    return { windowWidth };
}

function shouldDiscardTap(currentTimeStamp, lastTimeStamp) {
  if (lastTimeStamp != 0 && currentTimeStamp - lastTimeStamp < 250) {
    return true;
  }

  return false;
}

function formatImgUrl (json) {
  json.data && json.data.map((item, index) => {
    let replaceStr = "{width}";
    let url = item.src;
    url = url.replace(new RegExp('{width}'), windowWidth * 2).replace(new RegExp('{height}'), 100).replace(new RegExp('{mode}'), '2');
    item.src = url;
    // console.log(url)
  });
  return json;
}

function getImageUrl(url, windowWidth,height){
  if(!url){
    return '';
  }
  return url.replace(new RegExp('{width}'), windowWidth *2).replace(new RegExp('{height}'), height?height:100).replace(new RegExp('{mode}'), '2');
}

function formatImageUrl(url, width, height, mode){
  url = url || '';
  if (url && url.indexOf('?') === -1) {
      url = url + '?imageView2/{mode}/w/{width}/h/{height}';
  }

  return url.replace(/{width}/g, width).replace(/{height}/g, height).replace('{mode}', mode || 2);
}

// 自动识别 2倍 3倍图
function getImageUrlWithWH(image_url, image_width, image_height) {
  let app = getApp();
  const screenWidth = app.globalData.systemInfo.screenWidth;
  const pixelRatio = app.globalData.systemInfo.pixelRatio;
  const DEVICE_WIDTH_RATIO = screenWidth / 375.0;

  if (!image_url) {
    return '';
  }
  return image_url.replace(/{width}/g, parseInt(image_width * DEVICE_WIDTH_RATIO * pixelRatio)).replace(/{height}/g, parseInt(image_height * DEVICE_WIDTH_RATIO * pixelRatio)).replace('{mode}', 2);
}

function getBrandID (url) {
  let params = url.split("openby:yohobuy=")
  if (params.length == 2) {
    let jsonParam = JSON.parse(params[1])
    return jsonParam.params.brand_id;
  }
  return null;
}

function isStringEmpty(str){
  if (str===undefined || str ===null || str ===''){
    return true
  }else{
    return false
  }
  return true;
}

function getGoodDetailParam(url) {
  let params = url.split("openby:yohobuy=")
  if (params.length == 2) {
    let jsonParam = JSON.parse(params[1])
    return JSON.stringify(jsonParam.params);
  }
  return null;
}

function formatDateTime(inputTime) {
  var date = new Date();
  date.setTime(inputTime*1000);
  var y = date.getFullYear();
  var m = date.getMonth() + 1;
  m = m < 10 ? ('0' + m) : m;
  var d = date.getDate();
  d = d < 10 ? ('0' + d) : d;
  return y + '.' + m + '.'+d;
}; 

function formateTimestamp(start,end){
  var startTime = formatDateTime(start)
  var endTime = formatDateTime(end)
  return startTime+'-'+endTime
}

function getParameterByName(name, url) {
  if (!url) url = window.location.href;
  name = name.replace(/[\[\]]/g, "\\$&");
  var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
    results = regex.exec(url);
  if (!results) return null;
  if (!results[2]) return '';
  return decodeURIComponent(results[2].replace(/\+/g, " "));
}

function getSknFromUrl(url) {
  if (!url) return '';
  url = decodeURIComponent(url).toLowerCase();
  let components = url.split('/');
  let lastElement = components.pop();
  let startLegal = url.startsWith('https://m.yohobuy.com/product') || url.startsWith('http://m.yohobuy.com/product');
  let endLegal = lastElement.endsWith('.html');
  if (!startLegal || !endLegal) {
    return '';
  }

  let lastElementArray = lastElement.split('.');
  return lastElementArray[0];
}

function getShopIdFromUrl(url) {
  if (!url) return '';
  url = decodeURIComponent(url).toLowerCase();
  let components = url.split('/');
  let lastElement = components.pop();
  let startLegal = url.startsWith('https://m.yohobuy.com/shop') || url.startsWith('http://m.yohobuy.com/shop');
  let endLegal = lastElement.endsWith('.html');
  if (!startLegal || !endLegal) {
    return '';
  }

  let nameAndId = lastElement.split('.')[0];
  let shopId = nameAndId.split('-').pop();
  return shopId;
}

function getShopID(url) {
  let params = url.split("openby:yohobuy=")
  if (params.length == 2) {
    let jsonParam = JSON.parse(params[1])
    return jsonParam.params.shop_id;
  }
  return null;
}

function contains(arr, obj) {
  for (var i = 0; i < arr.length; i++) {
    if (arr[i] == obj) {
      return i;
    }
  }
  return -1;
} 

function getGuangType(url) {
  let params = url.split("openby:yohobuy=")
  if (params.length == 2) {
    let jsonParam = JSON.parse(params[1])
    return jsonParam.params.type;
  }
  return null;
}

// public method for encoding  
function base64Encode(input) {
  let _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

  var output = "";
  var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
  var i = 0;
  input = _utf8_encode(input);
  while (i < input.length) {
    chr1 = input.charCodeAt(i++);
    chr2 = input.charCodeAt(i++);
    chr3 = input.charCodeAt(i++);
    enc1 = chr1 >> 2;
    enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
    enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
    enc4 = chr3 & 63;
    if (isNaN(chr2)) {
      enc3 = enc4 = 64;
    } else if (isNaN(chr3)) {
      enc4 = 64;
    }
    output = output +
      _keyStr.charAt(enc1) + _keyStr.charAt(enc2) +
      _keyStr.charAt(enc3) + _keyStr.charAt(enc4);
  }
  return output;
}

// public method for decoding  
function base64Decode(input) {
  let _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
  var output = "";
  var chr1, chr2, chr3;
  var enc1, enc2, enc3, enc4;
  var i = 0;
  input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
  while (i < input.length) {
    enc1 = _keyStr.indexOf(input.charAt(i++));
    enc2 = _keyStr.indexOf(input.charAt(i++));
    enc3 = _keyStr.indexOf(input.charAt(i++));
    enc4 = _keyStr.indexOf(input.charAt(i++));
    chr1 = (enc1 << 2) | (enc2 >> 4);
    chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
    chr3 = ((enc3 & 3) << 6) | enc4;
    output = output + String.fromCharCode(chr1);
    if (enc3 != 64) {
      output = output + String.fromCharCode(chr2);
    }
    if (enc4 != 64) {
      output = output + String.fromCharCode(chr3);
    }
  }
  output = _utf8_decode(output);
  return output;
}

function _utf8_encode(string) {
  string = string.replace(/\r\n/g, "\n");
  var utftext = "";
  for (var n = 0; n < string.length; n++) {
    var c = string.charCodeAt(n);
    if (c < 128) {
      utftext += String.fromCharCode(c);
    } else if ((c > 127) && (c < 2048)) {
      utftext += String.fromCharCode((c >> 6) | 192);
      utftext += String.fromCharCode((c & 63) | 128);
    } else {
      utftext += String.fromCharCode((c >> 12) | 224);
      utftext += String.fromCharCode(((c >> 6) & 63) | 128);
      utftext += String.fromCharCode((c & 63) | 128);
    }

  }
  return utftext;
}

// private method for UTF-8 decoding  
function _utf8_decode(utftext) {
  var string = "";
  var i = 0;
  var c  = 0;
  var c1 = 0;
  var c2 = 0;
  var c3 = 0;
  while (i < utftext.length) {
    c = utftext.charCodeAt(i);
    if (c < 128) {
      string += String.fromCharCode(c);
      i++;
    } else if ((c > 191) && (c < 224)) {
      c2 = utftext.charCodeAt(i + 1);
      string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
      i += 2;
    } else {
      c2 = utftext.charCodeAt(i + 1);
      c3 = utftext.charCodeAt(i + 2);
      string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
      i += 3;
    }
  }
  return string;
}
/*获取缓存
key: 关键词
fromPage: 来源页面名称
**/
function getYHStorageSync(key,fromPage) {
  // console.log(key)
  // console.log(fromPage)
  try {
    let res = wx.getStorageSync(key);
    // console.log(res);
    // console.log('-------------------------')
    return res;
  } catch (e) {
    wx.reportAnalytics('get_storage_error', {
      key: key,
      error: e.message,
      error_code: e.code,
      from_page: fromPage,
    });
    // console.log(e)
    return null;
  }
}

/*设置缓存
key: 关键词
value: 内容
fromPage: 来源页面名称
**/
function setStorageSync(key,value, fromPage) {
  try {
    wx.setStorageSync(key, value);
    return true;
  } catch (e) {
    return false;
  }
}

/*清除缓存
key: 关键词
fromPage: 来源页面名称
**/
function removeStorageSync(key, fromPage) {
  try {
    wx.removeStorageSync(key);
    return true;
  } catch (e) {
    return false;
  }
}

module.exports = {
  formatTimeByDefined,
  formatTime: formatTime,
  getDeviceInfo: getDeviceInfo,
  shouldDiscardTap,
  formatImgUrl,
  formatImageUrl,
  getBrandID,
  getGoodDetailParam,
  getImageUrl,
  formateTimestamp,
  getImageUrlWithWH,
  isStringEmpty,
  getParameterByName,
  getSknFromUrl,
  getShopIdFromUrl,
  getShopID,
  contains,
  getGuangType,
  base64Encode,
  base64Decode,
  getYHStorageSync,
  setStorageSync,
  removeStorageSync
}