package authorization

import (
	"encoding/json"
	"net/http"

	"proxui/backend/internal/membership"
	"proxui/backend/internal/rbac"
)

type Middleware struct{}

func NewMiddleware() Middleware {
	return Middleware{}
}

func (m Middleware) Require(action rbac.Action, next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		membership, ok := membership.FromRequest(r)
		if !ok || !rbac.Can(membership.Role, action) {
			writeError(w, http.StatusForbidden, "forbidden")
			return
		}

		next.ServeHTTP(w, r)
	})
}

func writeError(w http.ResponseWriter, status int, message string) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(status)
	_ = json.NewEncoder(w).Encode(map[string]string{"error": message})
}