package auth

import (
	"net/http"
	"strings"

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

func AuthMiddleware(jwtSecret []byte) gin.HandlerFunc {
	return func(c *gin.Context) {
		authHeader := c.GetHeader("Authorization")
		if authHeader == "" {
			c.AbortWithStatusJSON(http.StatusUnauthorized, ErrorResponse{Error: "authorization header required"})
			return
		}

		parts := strings.SplitN(authHeader, " ", 2)
		if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") {
			c.AbortWithStatusJSON(http.StatusUnauthorized, ErrorResponse{Error: "invalid authorization header format"})
			return
		}

		claims, err := ValidateToken(parts[1], jwtSecret)
		if err != nil {
			c.AbortWithStatusJSON(http.StatusUnauthorized, ErrorResponse{Error: "invalid or expired token"})
			return
		}

		c.Set("user_id", claims.UserID)
		c.Set("email", claims.Email)
		c.Next()
	}
}