package middleware

import (
	"net/http"

	"github.com/food-ai/backend/internal/infra/locale"
)

// Language reads the Accept-Language request header, resolves the best
// supported language via locale.Parse, and stores it in the request context.
// Downstream handlers retrieve it with locale.FromContext.
func Language(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		lang := locale.FromRequest(r)
		ctx := locale.WithLang(r.Context(), lang)
		next.ServeHTTP(w, r.WithContext(ctx))
	})
}