import config from '@/config/index.js';

const __NAME__ = config.name || 'MA';

/**
 * 缓存数据优化
 * var cache = require('utils/cache.js');
 * import cache from '../cache'
 * 使用方法 【
 *     一、设置缓存
 *         string    cache.put('k', 'string你好啊');
 *         json      cache.put('k', { "b": "3" }, 2);
 *         array     cache.put('k', [1, 2, 3]);
 *         boolean   cache.put('k', true);
 *     二、读取缓存
 *         默认值    cache.get('k')
 *         string    cache.get('k', '你好')
 *         json      cache.get('k', { "a": "1" })
 *     三、移除/清理
 *         移除: cache.remove('k');
 *         清理：cache.clear();
 * 】
 * @type {String}
 */
const prefix = config.env === 'release' ? `${__NAME__.toUpperCase()}_` : `${__NAME__.toUpperCase()}_${`${config.env}`.toUpperCase()}_`;
const postfix = '_SEED';
/**  
 * @description 设置缓存
 * @param {String} k [键名]  
 * @param {Any} v [键值]  
 * @param {Number} t [时间、单位秒]  
 */
function put(k, v, t) {
  uni.setStorageSync(prefix + k, v)
  var seconds = parseInt(t);
  if (seconds > 0) {
    var timestamp = Date.parse(new Date());
    timestamp = timestamp / 1000 + seconds;
    uni.setStorageSync(prefix + k + postfix, timestamp + "")
  } else {
    uni.removeStorageSync(prefix + k + postfix)
  }
}

/**  
 * 获取缓存   
 * @param {String} k [键名]  
 * @param {Any} def [获取为空时默认]  
 */
function get(k, def) {
  var deadtime = parseInt(uni.getStorageSync(prefix + k + postfix))
  if (deadtime) {
    if (parseInt(deadtime) < Date.parse(new Date()) / 1000) {
      if (def) {
        return def;
      } else {
        return false;
      }
    }
  }
  var res = uni.getStorageSync(prefix + k);
  if (res) {
    return res;
  } else {
    if (def == undefined || def == "") {
      def = false;
    }
    return def;
  }
}

/**  
 * @description 删除缓存
 * @param {String} k 键值
 */
function remove(k) {
  uni.removeStorageSync(prefix + k);
  uni.removeStorageSync(prefix + k + postfix);
}

/**  
 * @description 清理所有缓存
 */
function clear() {
  uni.clearStorageSync();
}

module.exports = {
  put: put,
  get: get,
  remove: remove,
  clear: clear,
}