class JFI_Klanten {

  public static function register_post_types(){

    register_post_type('jfi_client', [
      'label' => 'Opdrachtgevers',
      'public' => false,
      'show_ui' => true,
      'supports' => ['title','custom-fields'],
      'show_in_rest' => false
    ]);

    register_post_type('jfi_location', [
      'label' => 'Locaties',
      'public' => false,
      'show_ui' => true,
      'supports' => ['title','custom-fields'],
      'show_in_rest' => false
    ]);

    register_post_type('jfi_plan', [
      'label' => 'Plannen',
      'public' => false,
      'show_ui' => true,
      'supports' => ['title','custom-fields'],
      'show_in_rest' => false
    ]);
  }

  // hier komen pas de andere methods
}
  /* =========================
   * Helpers
   * ========================= */
  private static function can_edit(){
    return current_user_can('edit_posts');
  }

  private static function require_login(){
    check_ajax_referer('jfi_inspectie_nonce', 'nonce');
    if (!is_user_logged_in()) {
      wp_send_json_error(['msg' => 'Niet ingelogd.'], 403);
    }
  }

  private static function map_entity($post){
    $data = get_post_meta($post->ID, '_jfi_data', true);
    if (!is_array($data)) $data = [];

    return [
      'id'    => (int)$post->ID,
      'type'  => $post->post_type,
      'title' => $post->post_title,
      'data'  => $data
    ];
  }

  private static function set_index_meta($id, $post_type, $payload){
    if ($post_type === 'jfi_location' && isset($payload['opdrachtgeverId'])) {
      update_post_meta($id, '_jfi_client_id', (int)$payload['opdrachtgeverId']);
    }
    if ($post_type === 'jfi_plan' && isset($payload['locatieId'])) {
      update_post_meta($id, '_jfi_location_id', (int)$payload['locatieId']);
    }
  }

  /* =========================
   * AJAX: KLANTEN
   * ========================= */
  public static function ajax_list_klanten(){
    self::require_login();

    $q = new WP_Query([
      'post_type'      => 'jfi_client',
      'posts_per_page' => -1,
      'post_status'    => 'any'
    ]);

    $items = array_map([__CLASS__, 'map_entity'], $q->posts);
    wp_send_json_success(['items' => $items]);
  }

  public static function ajax_get_klant(){
    self::require_login();

    $id = (int)($_POST['id'] ?? 0);
    $p  = get_post($id);

    if (!$p || $p->post_type !== 'jfi_client') {
      wp_send_json_error(['msg' => 'Klant niet gevonden'], 404);
    }

    wp_send_json_success(['item' => self::map_entity($p)]);
  }

  public static function ajax_save_klant(){
    self::require_login();

    if (!self::can_edit()) {
      wp_send_json_error(['msg' => 'Geen rechten'], 403);
    }

    $id = (int)($_POST['id'] ?? 0);

    $data_json = (string)($_POST['data_json'] ?? '{}');
    $data = json_decode($data_json, true);
    if (!is_array($data)) $data = [];

    $naam = sanitize_text_field($data['naam'] ?? 'Nieuwe Opdrachtgever');

    if ($id > 0) {
      wp_update_post(['ID' => $id, 'post_title' => $naam]);
    } else {
      $id = wp_insert_post([
        'post_type'   => 'jfi_client',
        'post_title'  => $naam,
        'post_status' => 'publish'
      ]);
    }

    update_post_meta($id, '_jfi_data', $data);

    wp_send_json_success(['item' => self::map_entity(get_post($id))]);
  }

  /* =========================
   * AJAX: LOCATIES
   * ========================= */
  public static function ajax_list_locaties(){
    self::require_login();

    $clientId = (int)($_POST['clientId'] ?? 0);

    $args = [
      'post_type'      => 'jfi_location',
      'posts_per_page' => -1,
      'post_status'    => 'any'
    ];

    if ($clientId) {
      $args['meta_query'] = [[
        'key'     => '_jfi_client_id',
        'value'   => $clientId,
        'compare' => '='
      ]];
    }

    $q = new WP_Query($args);
    $items = array_map([__CLASS__, 'map_entity'], $q->posts);

    wp_send_json_success(['items' => $items]);
  }

  public static function ajax_get_locatie(){
    self::require_login();

    $id = (int)($_POST['id'] ?? 0);
    $p  = get_post($id);

    if (!$p || $p->post_type !== 'jfi_location') {
      wp_send_json_error(['msg' => 'Locatie niet gevonden'], 404);
    }

    wp_send_json_success(['item' => self::map_entity($p)]);
  }

  public static function ajax_save_locatie(){
    self::require_login();

    if (!self::can_edit()) {
      wp_send_json_error(['msg' => 'Geen rechten'], 403);
    }

    $id = (int)($_POST['id'] ?? 0);

    $data_json = (string)($_POST['data_json'] ?? '{}');
    $data = json_decode($data_json, true);
    if (!is_array($data)) $data = [];

    $naam = sanitize_text_field($data['naam'] ?? 'Nieuwe Locatie');

    if ($id > 0) {
      wp_update_post(['ID' => $id, 'post_title' => $naam]);
    } else {
      $id = wp_insert_post([
        'post_type'   => 'jfi_location',
        'post_title'  => $naam,
        'post_status' => 'publish'
      ]);
    }

    update_post_meta($id, '_jfi_data', $data);
    self::set_index_meta($id, 'jfi_location', $data);

    wp_send_json_success(['item' => self::map_entity(get_post($id))]);
  }

  /* =========================
   * AJAX: PLANNEN
   * ========================= */
  public static function ajax_list_plannen(){
    self::require_login();

    $locationId = (int)($_POST['locationId'] ?? 0);

    $args = [
      'post_type'      => 'jfi_plan',
      'posts_per_page' => -1,
      'post_status'    => 'any'
    ];

    if ($locationId) {
      $args['meta_query'] = [[
        'key'     => '_jfi_location_id',
        'value'   => $locationId,
        'compare' => '='
      ]];
    }

    $q = new WP_Query($args);
    $items = array_map([__CLASS__, 'map_entity'], $q->posts);

    wp_send_json_success(['items' => $items]);
  }

  public static function ajax_get_plan(){
    self::require_login();

    $id = (int)($_POST['id'] ?? 0);
    $p  = get_post($id);

    if (!$p || $p->post_type !== 'jfi_plan') {
      wp_send_json_error(['msg' => 'Plan niet gevonden'], 404);
    }

    wp_send_json_success(['item' => self::map_entity($p)]);
  }

  public static function ajax_save_plan(){
    self::require_login();

    if (!self::can_edit()) {
      wp_send_json_error(['msg' => 'Geen rechten'], 403);
    }

    $id = (int)($_POST['id'] ?? 0);

    $data_json = (string)($_POST['data_json'] ?? '{}');
    $data = json_decode($data_json, true);
    if (!is_array($data)) $data = [];

    $type  = sanitize_text_field($data['type'] ?? 'Scope 10');
    $datum = sanitize_text_field($data['datum'] ?? current_time('Y-m-d'));
    $title = $type . ' - ' . $datum;

    if ($id > 0) {
      wp_update_post(['ID' => $id, 'post_title' => $title]);
    } else {
      $id = wp_insert_post([
        'post_type'   => 'jfi_plan',
        'post_title'  => $title,
        'post_status' => 'publish'
      ]);
    }

    update_post_meta($id, '_jfi_data', $data);
    self::set_index_meta($id, 'jfi_plan', $data);

    wp_send_json_success(['item' => self::map_entity(get_post($id))]);
  }
}

  /* =========================
   * Post types (zoals oude klanten plugin)
   * ========================= */
  public static function register_post_types(){

    register_post_type('jfi_client', [
      'label' => 'Opdrachtgevers',
      'public' => false,
      'show_ui' => true,
      'supports' => ['title','custom-fields'],
      'show_in_rest' => false
    ]);

    register_post_type('jfi_location', [
      'label' => 'Locaties',
      'public' => false,
      'show_ui' => true,
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