const moment = require('moment');

const LEVEL = { all: 0, log: 1, info: 1, trace: 2, debug: 3, warn: 4, error: 5, off: 6 };
// 等级初始化
process.env.LOG_LEVEL === undefined && (process.env.LOG_LEVEL = 'all');
const keys = Object.keys(LEVEL);

keys.forEach(item => {
  const logger = console[item];
  if (logger) {
    console[item] = (...arg) => {
      LEVEL[process.env.LOG_LEVEL] <= LEVEL[item] &&
        logger(`${moment().format('YYYY-MM-DD HH:mm:ss')} [${item}]`, ...arg);
    };
  }
});