debug(auth): add detailed logging to HeaderAuthGuard middleware

backend/internal/api/middleware/auth_middleware.go

@@ -2,6 +2,7 @@ package middleware
 
 import (
 	"context"
+	"fmt"
 	"net/http"
 	"strings"
 
@@ -27,13 +28,21 @@ func NewMiddleware(authService ports.AuthService) *Middleware {
 // HeaderAuthGuard ensures valid JWT token is present.
 func (m *Middleware) HeaderAuthGuard(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		fmt.Printf("[AUTH DEBUG] === HeaderAuthGuard START ===\n")
+		fmt.Printf("[AUTH DEBUG] Method: %s, Path: %s\n", r.Method, r.URL.Path)
+
 		authHeader := r.Header.Get("Authorization")
 		var token string
 
+		fmt.Printf("[AUTH DEBUG] Authorization Header: '%s'\n", authHeader)
+
 		if authHeader != "" {
 			parts := strings.Split(authHeader, " ")
 			if len(parts) == 2 && parts[0] == "Bearer" {
 				token = parts[1]
+				fmt.Printf("[AUTH DEBUG] Token from Header (first 20 chars): '%s...'\n", token[:min(20, len(token))])
+			} else {
+				fmt.Printf("[AUTH DEBUG] Invalid header format: %d parts, first part: '%s'\n", len(parts), parts[0])
 			}
 		}
 
@@ -42,24 +51,34 @@ func (m *Middleware) HeaderAuthGuard(next http.Handler) http.Handler {
 			cookie, err := r.Cookie("jwt")
 			if err == nil {
 				token = cookie.Value
+				fmt.Printf("[AUTH DEBUG] Token from Cookie (first 20 chars): '%s...'\n", token[:min(20, len(token))])
+			} else {
+				fmt.Printf("[AUTH DEBUG] No jwt cookie found: %v\n", err)
 			}
 		}
 
 		if token == "" {
+			fmt.Printf("[AUTH DEBUG] No token found - returning 401\n")
 			http.Error(w, "Missing Authorization Header or Cookie", http.StatusUnauthorized)
 			return
 		}
+
+		fmt.Printf("[AUTH DEBUG] Validating token...\n")
 		claims, err := m.authService.ValidateToken(token)
 		if err != nil {
+			fmt.Printf("[AUTH DEBUG] Token validation FAILED: %v\n", err)
 			http.Error(w, "Invalid Token: "+err.Error(), http.StatusUnauthorized)
 			return
 		}
 
+		fmt.Printf("[AUTH DEBUG] Token VALID! Claims: sub=%v, tenant=%v, roles=%v\n", claims["sub"], claims["tenant"], claims["roles"])
+
 		// Inject into Context
 		ctx := context.WithValue(r.Context(), ContextUserID, claims["sub"])
 		ctx = context.WithValue(ctx, ContextTenantID, claims["tenant"])
 		ctx = context.WithValue(ctx, ContextRoles, claims["roles"])
 
+		fmt.Printf("[AUTH DEBUG] === HeaderAuthGuard SUCCESS ===\n")
 		next.ServeHTTP(w, r.WithContext(ctx))
 	})
 }