package auth

import (
	"net/http"
	"strings"

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

// AuthMiddleware vérifie le token JWT dans les headers
func AuthMiddleware(jwtManager *JWTManager) gin.HandlerFunc {
	return func(c *gin.Context) {
		// Extraire le token du header Authorization
		authHeader := c.GetHeader("Authorization")
		if authHeader == "" {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "token manquant"})
			c.Abort()
			return
		}

		// Format: "Bearer <token>"
		parts := strings.SplitN(authHeader, " ", 2)
		if len(parts) != 2 || parts[0] != "Bearer" {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "format token invalide"})
			c.Abort()
			return
		}

		tokenString := parts[1]

		// Valider le token
		claims, err := jwtManager.ValidateToken(tokenString)
		if err != nil {
			c.JSON(http.StatusUnauthorized, gin.H{"error": err.Error()})
			c.Abort()
			return
		}

		// Stocker les claims dans le contexte
		c.Set("user_id", claims.UserID)
		c.Set("role", claims.Role)

		c.Next()
	}
}

// OptionalAuthMiddleware vérifie le token s'il est présent, mais ne bloque pas sans
func OptionalAuthMiddleware(jwtManager *JWTManager) gin.HandlerFunc {
	return func(c *gin.Context) {
		authHeader := c.GetHeader("Authorization")
		if authHeader == "" {
			c.Next()
			return
		}

		parts := strings.SplitN(authHeader, " ", 2)
		if len(parts) != 2 || parts[0] != "Bearer" {
			c.Next()
			return
		}

		tokenString := parts[1]
		claims, err := jwtManager.ValidateToken(tokenString)
		if err != nil {
			c.Next()
			return
		}

		c.Set("user_id", claims.UserID)
		c.Set("role", claims.Role)
		c.Next()
	}
}