package logger

import (
	"fmt"
	"gitea.loveuer.com/yizhisec/packages/logger"
	"gitea.loveuer.com/yizhisec/packages/opt"
	"gitea.loveuer.com/yizhisec/packages/tool"
	"github.com/gin-gonic/gin"
	"strings"
	"sync"
	"time"
)

var (
	defaultTrace      = "middleware-logger"
	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()

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

		var logFn func(msg string, data ...any)
		switch {
		case status >= 500:
			logFn = logger.Error
		case status >= 400:
			logFn = logger.Warn
		default:
			logFn = logger.Info
		}

		if logFn != nil {
			b := stringBuilderPool.Get().(*strings.Builder)
			b.Reset()

			b.WriteString("[")
			b.WriteString(fmt.Sprintf("%36s", trace))
			b.WriteString("] | ")
			b.WriteString(fmt.Sprintf("%3d", 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)

			logFn(b.String())

			stringBuilderPool.Put(b)
		}
	}
}