<?php
/**
 * @file
 * Acquia SDK module functions.
 */

use Acquia\Cloud\Api\CloudApiClient;
use Acquia\Network\AcquiaNetworkClient;
use Acquia\Common\Services;

/**
 * Implements hook_menu().
 */
function acquiasdk_menu() {
  $items = array();

  $items['admin/config/development/acquiasdk'] = array(
    'title' => 'Acquia Cloud API Settings',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('acquiasdk_settings'),
    'access arguments' => array('administer acquiasdk'),
  );

  return $items;
}

/**
 * Implements hook_permission().
 */
function acquiasdk_permission() {
  $perms = array();

  $parms['administer acquiasdk'] = array(
    'title' => t('Administer Acquia SDK'),
    'description' => t('Perform administration functions for Acquia SDK module.'),
  );

  return $perms;
}

/**
 * Acquia SDK module settings form.
 */
function acquiasdk_settings($form, &$form_state) {
  $form = array();

  $account_link = l(t('Acquia account page'), 'https://accounts.acquia.com/account', array('attributes' => array('target' => '_blank')));
  $form['cloudapi'] = array(
    '#type' => 'fieldset',
    '#title' => t('Cloud API'),
    '#description' => t('Obtain your Acquia Cloud API credentials from your !link.', array('!link' => $account_link)),
  );

  $form['cloudapi']['acquiasdk_cloudapi_username'] = array(
    '#type' => 'textfield',
    '#title' => t('Username'),
    '#default_value' => variable_get('acquiasdk_cloudapi_username'),
  );

  $form['cloudapi']['acquiasdk_cloudapi_password'] = array(
    '#type' => 'password',
    '#title' => t('Password'),
    '#description' => t('Leave this blank to keep the existing password.'),
  );

  $network_link = l(t('Acquia Insight'), 'https://insight.acquia.com/', array('attributes' => array('target' => '_blank')));
  $form['network'] = array(
    '#type' => 'fieldset',
    '#title' => t('Acquia Network'),
    '#description' => t('Obtain your Acquia Network credentials from !link.', array('!link' => $network_link)),
  );

  $form['network']['acquiasdk_network_id'] = array(
    '#type' => 'textfield',
    '#title' => t('ID'),
    '#default_value' => variable_get('acquiasdk_network_id'),
  );

  $form['network']['acquiasdk_network_key'] = array(
    '#type' => 'password',
    '#title' => t('Key'),
    '#description' => t('Leave this blank to keep the existing key.'),
  );

  $form = system_settings_form($form);
  return $form;
}

/**
 * Validates Acquia SDK module settings form.
 */
function acquiasdk_settings_validate($form, &$form_state) {
  $password_fields = array(
    'acquiasdk_cloudapi_password' => 'acquiasdk_cloudapi_username',
    'acquiasdk_network_key' => 'acquiasdk_network_id',
  );

  foreach ($password_fields as $password_field => $user_field) {
    $field =& $form_state['values'][$password_field];
    if (!$field) {
      // Hack to preserve the existing value if no new value is set.
      unset($form_state['values'][$password_field]);
      continue;
    }

    if (!$form_state['values'][$user_field]) {
      form_set_error($user_field, t('Username is required when providing a password'));
    }

    if (module_exists('encrypt')) {
      $field = encrypt($field);
    }
  }
}

/**
 * Instantiates a Acquia Cloud API client object.
 *
 * @param string $username
 *   (optional) Acquia Cloud API username. If NULL then global config is used.
 * @param string $password
 *   (optional) Acquia Cloud API password. If NULL then global config is used.
 *
 * @return CloudApiClient
 *   Acquia Cloud API client object.
 */
function acquiasdk_get_cloudapi_client($username = NULL, $password = NULL) {
  if (!$username) {
    $username = variable_get('acquiasdk_cloudapi_username');
  }

  if (!$password) {
    $password = acquiasdk_variable_get('acquiasdk_cloudapi_password');
  }

  if (!$username || !$password) {
    throw new Exception('Invalid Acquia Cloud API credentials.');
  }

  $cloudapi = CloudApiClient::factory(array(
    'username' => $username,
    'password' => $password,
  ));

  return $cloudapi;
}

/**
 * Instantiates Acquia Network client object.
 *
 * @param string $network_id
 *   Acquia Network id. If NULL then global config is used. (optional)
 * @param string $network_key
 *   Acquia Network key. If NULL then global config is used. (optional)
 *
 * @return AcquiaNetworkClient
 *   Acquia Network client object.
 */
function acquiasdk_get_network_client($network_id = NULL, $network_key = NULL) {
  if (!$network_id) {
    $network_id = variable_get('acquiasdk_network_id');
  }

  if (!$password) {
    $network_key = acquiasdk_variable_get('acquiasdk_network_key');
  }

  if (!$network_id || !$network_key) {
    throw new Exception('Invalid Acquia Network credentials.');
  }

  $network = AcquiaNetworkClient::factory(array(
    'network_id' => $network_id,
    'network_key' => $network_key,
  ));

  return $network;
}

/**
 * Retrieves variable with transparent unencryption if supported.
 *
 * @param string $name
 *   The name of the variable to return.
 *
 * @return mixed
 *   The value of the variable or NULL if not found.
 */
function acquiasdk_variable_get($name) {
  $encrypted = &drupal_static(__FUNCTION__);
  if (NULL == $encrypted) {
    $encrypted = module_exists('encrypt');
  }

  $var = variable_get($name);
  if (!$encrypted || 'a:3' != substr($var, 0, 3)) {
    return $var;
  }

  return decrypt($var);
}