const levels = {
    0: 'trace',
    1: 'debug',
    2: 'info',
    3: 'error',
}

// 记录调试信息，可以通过修改标志关闭
var d = {
    level: 3,

    trace: function (message, ...parts) {
        if (this.level >= this.trace) {
            console.log(message, ...parts)
        }
    },

    debug: function (message, ...parts) {
        if (this.level <= 1) {
            console.log(message, ...parts)
        }
    },

    log: function (message, ...parts) {
        if (this.level <= 2) {
            console.log(message, ...parts)
        }
    },

    error: function (message, ...parts) {
        if (this.level <= 3) {
            console.log(message, ...parts)
        }
    },

    info: null,
}

d.info = d.log

console.log('current level:', levels[d.level])

module.exports = d