package logger

import (
	"fmt"
	"strings"
	"sync"
	"time"

	"gitea.loveuer.com/yizhisec/packages/opt"
	"gitea.loveuer.com/yizhisec/packages/tool"
	"github.com/fatih/color"
	"github.com/gin-gonic/gin"
)

const (
	defaultTrace = "                   middleware-logger"
)

var (
	stringBuilderPool = sync.Pool{
		New: func() interface{} {
			return &strings.Builder{}
		},
	}
)

func New() gin.HandlerFunc {
	return func(c *gin.Context) {
		start := time.Now()
		ip := c.RemoteIP()

		trace := c.Request.Header.Get(opt.TraceKey)
		if trace == "" {
			if v, ok := c.Request.Context().Value(opt.TraceKey).(string); ok && v != "" {
				trace = v
			} else {
				trace = defaultTrace
			}
		}

		c.Next()

		var (
			status string
		)

		_status := c.Writer.Status()
		duration := time.Since(start)

		switch {
		case _status >= 500:
			status = color.RedString("%3d", _status)
		case _status >= 400:
			status = color.YellowString("%3d", _status)
		default:
			status = color.GreenString("%3d", _status)
		}

		b := stringBuilderPool.Get().(*strings.Builder)
		b.Reset()

		b.WriteString("GIN   | ")
		b.WriteString(start.Format("2006-01-02T15:04:05"))
		b.WriteString(" | ")
		b.WriteString(trace)
		b.WriteString(" | ")
		b.WriteString(status)
		b.WriteString(" | ")
		b.WriteString(fmt.Sprintf("%15s", ip))
		b.WriteString(" | ")
		b.WriteString(tool.HumanDuration(duration.Nanoseconds()))
		b.WriteString(" | ")
		b.WriteString(c.Request.Method)
		b.WriteString(" | ")
		b.WriteString(c.Request.RequestURI)

		fmt.Println(b.String())

		stringBuilderPool.Put(b)
	}
}