package api

import (
	"log"
	"net/http"
	"time"
)

// APIKeyAuth - Middleware fuer API-Key Authentifizierung
func APIKeyAuth(validKeys []string, next http.Handler) http.Handler {
	keySet := make(map[string]bool, len(validKeys))
	for _, k := range validKeys {
		keySet[k] = true
	}

	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		key := r.Header.Get("X-API-Key")
		// Fallback: Query-Parameter (fuer WebSocket-Verbindungen)
		if key == "" {
			key = r.URL.Query().Get("api_key")
		}
		if key == "" || !keySet[key] {
			http.Error(w, `{"error":"unauthorized"}`, http.StatusUnauthorized)
			return
		}
		next.ServeHTTP(w, r)
	})
}

// Logging - Request-Logging Middleware
func Logging(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		start := time.Now()
		next.ServeHTTP(w, r)
		log.Printf("%s %s %s", r.Method, r.URL.Path, time.Since(start))
	})
}