package wlog

import (
	"fmt"
)

// 格式化编码器
type Formatter interface {
	Format(entry *Entry) error
}

type TextFormatter struct {
	// 忽略基本文件名输出
	ignoreBasicFields bool
}

const (
	formatTime = "2006-01-02 15:04:05"
)

func (t *TextFormatter) Format(entry *Entry) error {
	entry.Buffer.WriteString(fmt.Sprintf("%s %s ", entry.Time.Format(formatTime), LevelNameMapping[entry.Level]))
	if !t.ignoreBasicFields {
		// 写入时间 level 信息
		if entry.File != "" {
			// 获取文件名
			entry.Buffer.WriteString(fmt.Sprintf("%s:%d ", entry.File, entry.Line))
		}
	}

	switch entry.Format {
	// 无特殊输出，采用 %v
	case FmtEmptySeparate:
		entry.Buffer.WriteString(fmt.Sprint(entry.Args...))
	default:
		entry.Buffer.WriteString(fmt.Sprintf(entry.Format, entry.Args...))

	}
	return nil
}