2 files changed, 126 insertions, 0 deletions

diff --git a/backend/internal/api/router.go b/backend/internal/api/router.go
index d28da71..a88ffbd 100644
--- a/backend/internal/api/router.go
+++ b/backend/internal/api/router.go
@@ -1,8 +1,12 @@
 package api
 
 import (
+	"io/fs"
+	"log"
 	"net/http"
 	"strings"
+
+	"yaum/internal/static"
 )
 
 func NewRouter(h *Handler, stream *StreamHandler, auth *AuthHandler) http.Handler {
@@ -33,9 +37,88 @@ func NewRouter(h *Handler, stream *StreamHandler, auth *AuthHandler) http.Handle
 
 	mux.Handle("GET /api/stream", stream)
 
+	// Static file serving — register only if build FS is available
+	if buildFS := static.BuildFS(); buildFS != nil {
+		staticHandler := spaFileServer(buildFS)
+		mux.HandleFunc("/", staticHandler.ServeHTTP)
+	} else {
+		log.Println("[router] nenhum build frontend encontrado — servindo apenas API")
+		// Still register root to give a friendly message
+		mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+			if strings.HasPrefix(r.URL.Path, "/api") {
+				http.NotFound(w, r)
+				return
+			}
+			w.WriteHeader(http.StatusOK)
+			w.Write([]byte(`YAUM API — frontend build not available.
+Start the frontend dev server (npm run dev) or set YAUM_STATIC_DIR.`))
+		})
+	}
+
 	return corsMiddleware(auth.Middleware(mux))
 }
 
+// spaFileServer returns an http.Handler that serves static files and falls
+// back to index.html (or 200.html) for SPA routes like /admin, /status/123.
+// Only GET/HEAD requests are handled; other methods return 405.
+func spaFileServer(fsys fs.FS) http.Handler {
+	fileServer := http.FileServer(http.FS(fsys))
+
+	exists := func(name string) bool {
+		f, err := fsys.Open(name)
+		if err != nil {
+			return false
+		}
+		f.Close()
+		return true
+	}
+
+	// Determine which SPA fallback file exists
+	fallbackFile := "200.html"
+	fallbackBytes, fallbackErr := fs.ReadFile(fsys, fallbackFile)
+	if fallbackErr != nil {
+		fallbackFile = "index.html"
+		fallbackBytes, fallbackErr = fs.ReadFile(fsys, fallbackFile)
+	}
+	if fallbackErr != nil {
+		log.Printf("[router] nenhum fallback SPA (200.html/index.html) encontrado")
+	}
+
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// Only serve GET/HEAD for static files
+		if r.Method != http.MethodGet && r.Method != http.MethodHead {
+			http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+			return
+		}
+
+		// API paths should already be handled by the mux, but just in case
+		if strings.HasPrefix(r.URL.Path, "/api") {
+			http.NotFound(w, r)
+			return
+		}
+
+		p := strings.TrimPrefix(r.URL.Path, "/")
+
+		// Root path or non-existent file → serve SPA fallback
+		if p == "" || !exists(p) {
+			if fallbackErr == nil {
+				w.Header().Set("Content-Type", "text/html; charset=utf-8")
+				w.WriteHeader(http.StatusOK)
+				w.Write(fallbackBytes)
+				return
+			}
+			http.NotFound(w, r)
+			return
+		}
+
+		fileServer.ServeHTTP(w, r)
+	})
+}
+
+
+
+
+
 func corsMiddleware(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		origin := r.Header.Get("Origin")
diff --git a/backend/internal/static/static.go b/backend/internal/static/static.go
new file mode 100644
index 0000000..53523a3
--- /dev/null
+++ b/backend/internal/static/static.go
@@ -0,0 +1,43 @@
+package static
+
+import (
+	"embed"
+	"io/fs"
+	"log"
+	"os"
+	"path/filepath"
+)
+
+//go:embed build
+var embeddedBuild embed.FS
+
+func BuildFS() fs.FS {
+	sub, err := fs.Sub(embeddedBuild, "build")
+	if err != nil {
+		log.Printf("[static] embed nao disponivel, tentando filesystem: %v", err)
+		// Fallback: look for build directory relative to the backend binary
+		dir := os.Getenv("YAUM_STATIC_DIR")
+		if dir == "" {
+			// Try common locations
+			candidates := []string{
+				"../frontend/build",
+				"frontend/build",
+				"./build",
+			}
+			for _, c := range candidates {
+				if info, e := os.Stat(c); e == nil && info.IsDir() {
+					dir = c
+					break
+				}
+			}
+		}
+		if dir != "" {
+			abs, _ := filepath.Abs(dir)
+			log.Printf("[static] servindo de %s", abs)
+			return os.DirFS(dir)
+		}
+		return nil
+	}
+	log.Println("[static] servindo de embed")
+	return sub
+}