<?php

// Until Entity API can load this itself.
require_once dirname(__FILE__) . '/includes/commerce_message.message.inc';

/**
 * Implements hook_views_api().
 */
function commerce_message_views_api() {
  return array(
    'api' => 3,
    'path' => drupal_get_path('module', 'commerce_message') . '/includes/views',
  );
}

/**
 * Implements hook_menu().
 */
function commerce_message_menu() {
  // History tab on orders.
  $items['admin/commerce/orders/%commerce_order/history'] = array(
    'title' => t('History'),
    'page callback' => 'commerce_message_history',
    'page arguments' => array(3),
    'access callback' => 'commerce_order_access',
    'access arguments' => array('view', 3),
    'type' => MENU_LOCAL_TASK,
    'context' => MENU_CONTEXT_PAGE | MENU_CONTEXT_INLINE,
    'weight' => 11,
  );

  return $items;
}

/**
 * Implements hook_module_implements_alter().
 * Move commerce_message_default_message_type_alter()
 * to the end of the "hook_default_message_type_alter" hooks (execution) list.
 */
function commerce_message_module_implements_alter(&$implementations, $hook) {
  if ($hook == 'default_message_type_alter') {
    $group = $implementations['commerce_message'];
    unset($implementations['commerce_message']);
    $implementations['commerce_message'] = $group;
  }
}

/**
 * Implements hook_message_presave().
 *
 * We cannot use a token to show the order-summary, since both Token and
 * Entity API modules invoke token_generate() which results with an array
 * instead of a string with the replacement text.
 *
 * Instead, upon saving the message for the first time we inject an
 * argument with a callback, that will return the order summary.
 *
 * @link http://drupal.org/node/1272560
 */
function commerce_message_message_presave(Message $message) {
  // Only support unsaved messages that re-use our order reference field.
  $wrapper = entity_metadata_wrapper('message', $message);
  if (!empty($message->mid) || !isset($wrapper->message_commerce_order)) {
    return;
  }

  $message->arguments['!order-summary'] = array(
    'callback' => 'commerce_message_order_summary',
    'pass message' => TRUE,
  );
}

/**
 * Message callback; Show order summary.
 *
 * @param Message $message
 *   The Message entity.
 *
 * @return string
 *   The output of the View.
 */
function commerce_message_order_summary(Message $message) {
  $wrapper = entity_metadata_wrapper('message', $message);
  $view = views_get_view('commerce_cart_summary');
  $view->set_arguments(array($wrapper->message_commerce_order->getIdentifier()));
  $view->hide_admin_links = TRUE;

  // Disable SQL query rewrite so this renders properly for token.
  // @link https://www.drupal.org/node/1895418
  $view->display['default']->display_options['query']['options']['disable_sql_rewrite'] = TRUE;

  return $view->preview();
}

/**
 * Displays the complete history for the given order.
 */
function commerce_message_history($order) {
  $arguments = array($order->order_id);
  $view = views_get_view('commerce_message_messages');
  $view->set_display('block_1');
  $view->set_arguments($arguments);
  $view->override_url = $_GET['q'];

  return $view->preview();
}

/**
 * Implements hook_flush_caches().
 */
function commerce_message_flush_caches() {
  commerce_message_message_field_refresh();
}

/**
 * Implements hook_multilingual_settings_changed().
 */
function commerce_message_multilingual_settings_changed() {
  // Rebuild the message types after modifying the language settings.
  entity_defaults_rebuild(array('message_type'));
}

/*
 * Implements of hook_element_info_alter().
 * extra process function for filter format to alter the format options
 */
function commerce_message_element_info_alter(&$type) {
  // Our process callback must run immediately after filter_process_format().
  $filter_process_format_location = array_search('filter_process_format', $type['text_format']['#process']);
  $replacement = array('filter_process_format', 'commerce_message_filter_process_format');
  array_splice($type['text_format']['#process'], $filter_process_format_location, 1, $replacement);
}

/**
 * Process callback for form elements that have a text format selector attached.
 *
 * This callback runs after filter_process_format() and performs additional
 * modifications to the form element.
 *
 * @see filter_process_format()
 *
 * Disable the Commerce Order Message format
 * for all entity types other than message_type type.
 */
function commerce_message_filter_process_format($element) {
  if (isset($element['#entity_type']) && $element['#entity_type'] != 'message_type') {
    $element['format']['format']['#options'] = array_diff_key($element['format']['format']['#options'], array('commerce_order_message' => 'commerce_order_message'));
  }

  return $element;
}