package auth

import (
	"net/http"
	"strings"

	"github.com/gin-gonic/gin"
)

const UserIDKey = "userID"

func (s *AuthService) RequireAuth() gin.HandlerFunc {
	return func(c *gin.Context) {
		header := c.GetHeader("Authorization")
		if header == "" {
			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
				"error": gin.H{"code": "MISSING_TOKEN", "message": "authorization header required"},
			})
			return
		}

		parts := strings.SplitN(header, " ", 2)
		if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") {
			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
				"error": gin.H{"code": "INVALID_TOKEN", "message": "invalid authorization format"},
			})
			return
		}

		claims, err := s.ValidateAccessToken(parts[1])
		if err != nil {
			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
				"error": gin.H{"code": "INVALID_TOKEN", "message": "invalid or expired token"},
			})
			return
		}

		c.Set(UserIDKey, claims)
		c.Next()
	}
}