<?php

namespace Civi\ActionProvider\Action\CiviCase;

use \Civi\ActionProvider\Action\AbstractAction;
use Civi\ActionProvider\ConfigContainer;
use Civi\ActionProvider\Parameter\FileSpecification;
use \Civi\ActionProvider\Parameter\ParameterBagInterface;
use \Civi\ActionProvider\Parameter\SpecificationBag;
use \Civi\ActionProvider\Parameter\Specification;
use \Civi\ActionProvider\Utils\CustomField;

use CRM_ActionProvider_ExtensionUtil as E;

class UploadCustomFileField extends AbstractAction {

  /**
   * Run the action
   *
   * @param ParameterInterface $parameters
   *   The parameters to this action.
   * @param ParameterBagInterface $output
   *   The parameters this action can send back
   * @return void
   */
  protected function doAction(ParameterBagInterface $parameters, ParameterBagInterface $output) {
    $case_id = $parameters->getParameter('case_id');
    $customFieldId = $this->configuration->getParameter('custom_field');
    $file = $parameters->getParameter('file');
    $deleteCurrentFile = false;
    $uploadNewOne = true;
    $updateCustomField = false;
    if (empty($file)) {
      $deleteCurrentFile = true;
      $uploadNewOne = false;
    } elseif (!isset($file['id'])) {
      $deleteCurrentFile = true;
    } elseif (isset($file['id'])) {
      $uploadNewOne = false;
    }
    try {
      $currentFile = civicrm_api3('Case', 'getvalue', [
        'id' => $case_id,
        'return' => 'custom_' . $customFieldId
      ]);
      if (isset($file['id']) && $currentFile && $file['id'] != $currentFile) {
        $deleteCurrentFile = true;
        $updateCustomField = $file['id'];
      }
      if ($currentFile && $deleteCurrentFile) {
        civicrm_api3('Attachment', 'delete', array('id' => $currentFile));
      }
    } catch (\Exception $e) {
      // Do nothing
    }

    $content = '';
    if (isset($file['content'])) {
      $content = base64_decode($file['content']);
    } elseif (isset($file['url'])) {
      $content = file_get_contents($file['url']);
    }
    if (empty($content)) {
      return;
    }

    if ($uploadNewOne) {
      $fileParams = [
        'name' => $file['name'],
        'mime_type' => $file['mime_type'],
        'uri' => \CRM_Utils_File::makeFileName($file['name']),
      ];
      $fileDao = \CRM_Core_BAO_File::create($fileParams);
      $fileDao->find(TRUE);

      $entityFileDao = new \CRM_Core_DAO_EntityFile();
      $entityFile['entity_table'] = 'civicrm_case';
      $entityFile['entity_id'] = $case_id;
      $entityFileDao->copyValues($entityFile);
      $entityFileDao->file_id = $fileDao->id;
      $entityFileDao->save();

      $config = \CRM_Core_Config::singleton();
      $path = $config->customFileUploadDir . DIRECTORY_SEPARATOR . $fileDao->uri;
      if (is_string($content)) {
        file_put_contents($path, $content);
      }

      $updateCustomField = $fileDao->id;
    }
    if ($updateCustomField) {
      civicrm_api3('Case', 'create', [
        'id' => $case_id,
        'custom_' . $customFieldId => $updateCustomField,
      ]);
    }
  }

  /**
   * Returns the specification of the configuration options for the actual action.
   *
   * @return SpecificationBag
   */
  public function getConfigurationSpecification() {
    $fileFields = array();
    $config = ConfigContainer::getInstance();
    $customGroups = $config->getCustomGroupsForEntity('Case');
    foreach ($customGroups as $customGroup) {
      if (!empty($customGroup['is_active'])) {
        $customFields = $config->getCustomFieldsOfCustomGroup($customGroup['id']);
        foreach($customFields as $customField) {
          if ($customField['data_type'] == 'File') {
            $fileFields[$customField['id']] = $customGroup['title']. ' :: '.$customField['label'];
          }
        }
      }
    }

    return new SpecificationBag([
      new Specification('custom_field', 'Integer', E::ts('File field'), true, null, null, $fileFields, false),
    ]);
  }

  /**
   * Returns the specification of the parameters of the actual action.
   *
   * @return SpecificationBag
   */
  public function getParameterSpecification() {
    $specs = new SpecificationBag();
    $specs->addSpecification(new Specification('case_id', 'Integer', E::ts('Case ID'), true));
    $specs->addSpecification(new FileSpecification('file', E::ts('File'), false));
    return $specs;
  }

  /**
   * Returns the specification of the output parameters of this action.
   *
   * This function could be overriden by child classes.
   *
   * @return SpecificationBag
   */
  public function getOutputSpecification() {
    return new SpecificationBag();
  }


}