package middleware

import (
	"pcgamedb/log"
	"strings"
	"time"

	"github.com/gin-gonic/gin"
	"go.uber.org/zap"
)

func Logger() gin.HandlerFunc {
	return func(c *gin.Context) {
		startTime := time.Now()
		path := c.Request.URL.Path
		raw := c.Request.URL.RawQuery

		c.Next()

		if shouldSkipLog(path) {
			return
		}

		if raw != "" {
			path = path + "?" + raw
		}

		fields := []zap.Field{
			zap.Int("status", c.Writer.Status()),
			zap.String("method", c.Request.Method),
			zap.String("path", path),
			zap.String("ip", getRealIP(c)),
			zap.Duration("latency", time.Since(startTime)),
		}

		if len(c.Errors) > 0 {
			fields = append(fields, zap.Strings("errors", c.Errors.Errors()))
		}
		log.Logger.Info("Request", fields...)
	}
}

func getRealIP(c *gin.Context) string {
	if ip := c.GetHeader("X-Real-IP"); ip != "" {
		return ip
	}
	if ip := c.GetHeader("X-Forwarded-For"); ip != "" {
		if index := strings.Index(ip, ","); index != -1 {
			return strings.TrimSpace(ip[:index])
		}
		return ip
	}
	if ip := c.GetHeader("X-Originating-IP"); ip != "" {
		return ip
	}
	return c.ClientIP()
}

func shouldSkipLog(path string) bool {
	skipPaths := []string{
		"/swagger/",
		"/favicon.ico",
		"/health",
	}

	for _, p := range skipPaths {
		if strings.HasPrefix(path, p) {
			return true
		}
	}
	return false
}