package middleware

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

	"github.com/limeleaf/diffdown/internal/auth"
)

func Logger(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))
	})
}

// InjectUser adds user ID to context if logged in. Does not block.
func InjectUser(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		userID := auth.GetUserID(r)
		if userID != "" {
			ctx := context.WithValue(r.Context(), auth.UserIDKey, userID)
			r = r.WithContext(ctx)
		}
		next.ServeHTTP(w, r)
	})
}

// RequireAuth blocks unauthenticated requests.
func RequireAuth(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		userID := auth.UserIDFromContext(r.Context())
		if userID == "" {
			http.Redirect(w, r, "/auth/login", http.StatusSeeOther)
			return
		}
		next.ServeHTTP(w, r)
	})
}