// 正在表达式
export const REGEXPS = {
  "mobile": /^1\d{10}$/
}

// 验证手机
export function checkMobile(str) {
  return REGEXPS.mobile.test(str);
}

/**
 * 链接参数转换为obj
 * 入参 完整链接
 * @param {*} url
 */
export function param2Obj(url) {
  const search = url.split('?')[1]
  if (!search) {
    return {}
  }
  return JSON.parse(
    '{"' +
    decodeURIComponent(search)
    .replace(/"/g, '\\"')
    .replace(/&/g, '","')
    .replace(/=/g, '":"') +
    '"}'
  )
}



//获取cookie、
export function getCookie(name) {
  var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
  if (arr = document.cookie.match(reg))
    return (arr[2]);
  else
    return null;
}

//设置cookie
export function setCookie(c_name, value, expiredays) {
  var exdate = new Date();
  exdate.setDate(exdate.getDate() + expiredays);
  document.cookie = c_name + "=" + escape(value) + ((expiredays == null) ? "" : ";expires=" + exdate.toGMTString());
};

//删除cookie
export function delCookie(name) {
  var exp = new Date();
  exp.setTime(exp.getTime() - 1);
  var cval = getCookie(name);
  if (cval != null)
    document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString();
};


/**
 * 获取环境信息
 * @return {Object} 环境信息对象
 */
export function getEnv() {
  var nav = window.navigator;
  var env = {
    "iphone": false,
    "ipad": false,
    "android": false,
    "pc": false,
    "ios": false,
    "ver": "0"
  };

  var ua = nav.userAgent;
  var android = ua.match(/(Android)\s+([\d.]+)/);
  var ipad = ua.match(/(iPad).*OS\s([\d_]+)/);
  var iphone = !ipad && ua.match(/(iPhone\sOS)\s([\d_]+)/);
  if (ipad) {
    env.ipad = ipad[1] && true || false;
    env.ver = ipad[2] && ipad[2].replace(/-/g, ".") || "";
    env.ios = true;
  } else if (iphone) {
    env.iphone = iphone[1] && true || false;
    env.ver = iphone[2] && iphone[2].replace(/-/g, ".") || "";
    env.ios = true;
  } else if (android) {
    env.android = android[1] && true || false;
    env.ver = android[2];
  } else {
    env.pc = true;
  }

  return env;
}

/**
 * 设定页面 title
 * @param {[type]} title [description]
 */
export function setTitle(title) {
  if (!title) {
    return;
  }
  document.title = title;
  // if (ENV.ios && navigator.userAgent.toLowerCase().indexOf("micromessenger") !== -1) {
  // 修复微信端IOS无法修改document.title的情况
  if (getEnv().ios && (navigator.userAgent.toLowerCase().indexOf("micromessenger") !== -1 || navigator.userAgent.toLowerCase().indexOf("alipay") !== -1)) {
    //修复IOS微信端和支付宝无法修改document.title的情况
    var $iframe = document.createElement('iframe');
    $iframe.className = "C-hiddenIframe";
    $iframe.src = "/" + location.pathname.split('/')[1] + "/favicon.ico";
    $iframe.style.visibility = 'hidden';
    $iframe.style.width = '1px';
    $iframe.style.height = '1px';
    $iframe.onload = function onIframeLoad() {
      setTimeout(function () {
        $iframe.onload = null;
        onIframeLoad = null;
        document.body.removeChild($iframe);
        $iframe = null;
      }, 0);
    };
    document.body.appendChild($iframe);
  }
}

// 为链接添加参数
export function addQuery(url, query) {
  query = query || {}
  query = (function (query) {
    var q = []
    Object.keys(query).forEach(function (_q) {
      q.push(_q + '=' + query[_q])
    })
    return q.join('&')
  })(query)
  if (url.indexOf('?') !== -1) {
    url += '&' + query
  } else {
    url += '?' + query
  }
  return url
}


/**
 * 获得当前页面的path
 * @return {String} 页面path
 */
export function getPath() {
  var path = window.location.hash;
  path = path || "#/";
  path = path === "#/" ? "#/index" : path;
  path = path.split("?");
  return path[0];
}

// 获取 url 参数
export function getQuery(name) {
  return decodeURIComponent((new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(location.href) || [, ""])[1].replace(/\+/g, '%20')) || null;
}

/**
 * 从数组中获取 key未value的对象
 * @param {*} value
 * @param {*} key
 * @param {*} list
 */
export function getObjByListKeyValue(value, key, list) {
  let result = null;
  list.forEach(element => {
    if (element[key + ""] == value) {
      result = element;
    }
  });
  return result;
}

/**
 * 把 \n换行符转换成<br>
 * 转换后需要用 v-html渲染
 * 用{{}}会当成字符串把 html渲染出来
 */
export function formatBr(str) {
  str = str.replace(/\n/g, '<br/>')
  return str
};


/**
 * @desc 函数防抖
 * @param func 函数
 * @param wait 延迟执行毫秒数
 * @param immediate true 表立即执行，false 表非立即执行
 */
export function debounce(func, wait, immediate) {
  let timeout;

  return function () {
    let context = this;
    let args = arguments;

    if (timeout) clearTimeout(timeout);
    if (immediate) {
      var callNow = !timeout;
      timeout = setTimeout(() => {
        timeout = null;
      }, wait)
      if (callNow) func.apply(context, args)
    } else {
      timeout = setTimeout(function () {
        func.apply(context, args)
      }, wait);
    }
  }
}

/**
 * @desc 函数节流
 * @param func 函数
 * @param wait 延迟执行毫秒数
 * @param type 1 表时间戳版，2 表定时器版
 * 时间戳版的函数触发是在时间段内开始的时候，而定时器版的函数触发是在时间段内结束的时候。
 */
export function throttle(func, wait, type) {
  if (type === 1) {
    var previous = 0;
  } else if (type === 2) {
    var timeout;
  }
  return function () {
    let context = this;
    let args = arguments;
    if (type === 1) {
      let now = Date.now();

      if (now - previous > wait) {
        func.apply(context, args);
        previous = now;
      }
    } else if (type === 2) {
      if (!timeout) {
        timeout = setTimeout(() => {
          timeout = null;
          func.apply(context, args)
        }, wait)
      }
    }
  }
}