<?php
/*
 +--------------------------------------------------------------------+
 | Copyright CiviCRM LLC. All rights reserved.                        |
 |                                                                    |
 | This work is published under the GNU AGPLv3 license with some      |
 | permitted exceptions and without any warranty. For full license    |
 | and copyright information, see https://civicrm.org/licensing       |
 +--------------------------------------------------------------------+
 */

/**
 *
 * @package CRM
 * @copyright CiviCRM LLC https://civicrm.org/licensing
 */

/**
 * This class provides the functionality to add contacts for voter reservation.
 */
class CRM_Campaign_Form_Task_Reserve extends CRM_Campaign_Form_Task {

  /**
   * @var int
   *   Survey id.
   */
  protected $_surveyId;

  /**
   * Interviewer id
   *
   * @var int
   */
  protected $_interviewerId;

  /**
   * Survey details
   *
   * @var object
   */
  protected $_surveyDetails;

  /**
   * Number of voters
   *
   * @var int
   */
  protected $_numVoters;

  /**
   * Build all the data structures needed to build the form.
   */
  public function preProcess() {
    parent::preProcess();

    //get the survey id from user submitted values.
    $this->_surveyId = $this->get('surveyId');
    $this->_interviewerId = $this->get('interviewerId');
    if (!$this->_surveyId) {
      CRM_Core_Error::statusBounce(ts("Could not find Survey Id."));
    }
    if (!$this->_interviewerId) {
      CRM_Core_Error::statusBounce(ts("Missing Interviewer contact."));
    }
    if (!is_array($this->_contactIds) || empty($this->_contactIds)) {
      CRM_Core_Error::statusBounce(ts("Could not find contacts for reservation."));
    }

    $params = ['id' => $this->_surveyId];
    CRM_Campaign_BAO_Survey::retrieve($params, $this->_surveyDetails);

    //get the survey activities.
    $activityStatus = CRM_Core_PseudoConstant::activityStatus('name');
    $statusIds = [];
    foreach (['Scheduled'] as $name) {
      if ($statusId = array_search($name, $activityStatus)) {
        $statusIds[] = $statusId;
      }
    }

    // these are the activities count that are linked to the current
    // interviewer and current survey and not the list of ALL survey activities
    $this->_numVoters = CRM_Campaign_BAO_Survey::getSurveyActivities($this->_surveyId,
      $this->_interviewerId,
      $statusIds,
      NULL,
      TRUE
    );
    //validate the selected survey.
    $this->validateSurvey();
    $this->assign('surveyTitle', $this->_surveyDetails['title']);
    $this->assign('activityType', $this->_surveyDetails['activity_type_id']);
    $this->assign('surveyId', $this->_surveyId);

    //append breadcrumb to survey dashboard.
    if (CRM_Campaign_BAO_Campaign::accessCampaign()) {
      $url = CRM_Utils_System::url('civicrm/campaign', 'reset=1&subPage=survey');
      CRM_Utils_System::appendBreadCrumb([['title' => ts('Survey(s)'), 'url' => $url]]);
    }

    //set the title.
    $this->setTitle(ts('Reserve Respondents'));
  }

  public function validateSurvey() {
    $errorMsg = NULL;
    $maxVoters = $this->_surveyDetails['max_number_of_contacts'] ?? NULL;
    if ($maxVoters) {
      if ($maxVoters <= $this->_numVoters) {
        $errorMsg = ts('The maximum number of contacts is already reserved for this interviewer.');
      }
      elseif (count($this->_contactIds) > ($maxVoters - $this->_numVoters)) {
        $errorMsg = ts('You can reserve a maximum of %count contact at a time for this survey.',
          [
            'plural' => 'You can reserve a maximum of %count contacts at a time for this survey.',
            'count' => $maxVoters - $this->_numVoters,
          ]
        );
      }
    }

    $defaultNum = $this->_surveyDetails['default_number_of_contacts'] ?? NULL;
    if (!$errorMsg && $defaultNum && (count($this->_contactIds) > $defaultNum)) {
      $errorMsg = ts('You can reserve a maximum of %count contact at a time for this survey.',
        [
          'plural' => 'You can reserve a maximum of %count contacts at a time for this survey.',
          'count' => $defaultNum,
        ]
      );
    }

    if ($errorMsg) {
      CRM_Core_Error::statusBounce($errorMsg);
    }
  }

  /**
   * Build the form object.
   */
  public function buildQuickForm() {
    // allow to add contact to either new or existing group.
    $this->addElement('text', 'ActivityType', ts('Activity Type'));
    $this->addElement('text', 'newGroupName', ts('Name for new group'));
    $this->addElement('text', 'newGroupDesc', ts('Description of new group'));
    $groups = CRM_Core_PseudoConstant::nestedGroup();
    $hasExistingGroups = FALSE;
    if (is_array($groups) && !empty($groups)) {
      $hasExistingGroups = TRUE;
      $this->addElement('select', 'groups', ts('Add respondent(s) to existing group(s)'),
        $groups, ['multiple' => "multiple", 'class' => 'crm-select2']
      );
    }
    $this->assign('hasExistingGroups', $hasExistingGroups);

    $buttons = [
      [
        'type' => 'done',
        'name' => ts('Reserve'),
        'subName' => 'reserve',
        'isDefault' => TRUE,
      ],
    ];

    if (CRM_Core_Permission::check('manage campaign') ||
      CRM_Core_Permission::check('administer CiviCampaign') ||
      CRM_Core_Permission::check('interview campaign contacts')
    ) {
      $buttons[] = [
        'type' => 'next',
        'name' => ts('Reserve and Interview'),
        'subName' => 'reserveToInterview',
      ];
    }
    $buttons[] = [
      'type' => 'back',
      'name' => ts('Cancel'),
    ];

    $this->addButtons($buttons);
    $this->addFormRule(['CRM_Campaign_Form_Task_Reserve', 'formRule'], $this);
  }

  /**
   * Global validation rules for the form.
   *
   * @param array $fields
   *   Posted values of the form.
   *
   * @param $files
   * @param self $self
   *
   * @return array
   *   list of errors to be posted back to the form
   */
  public static function formRule($fields, $files, $self) {
    $errors = [];
    $invalidGroupName = FALSE;
    if (!empty($fields['newGroupName'])) {
      $title = trim($fields['newGroupName']);
      $name = CRM_Utils_String::titleToVar($title);
      $query = 'select count(*) from civicrm_group where name like %1 OR title like %2';
      $grpCnt = CRM_Core_DAO::singleValueQuery($query, [
        1 => [$name, 'String'],
        2 => [$title, 'String'],
      ]);
      if ($grpCnt) {
        $invalidGroupName = TRUE;
        $errors['newGroupName'] = ts('Group \'%1\' already exists.', [1 => $fields['newGroupName']]);
      }
    }
    $self->assign('invalidGroupName', $invalidGroupName);

    return empty($errors) ? TRUE : $errors;
  }

  /**
   * Process the form after the input has been submitted and validated.
   */
  public function postProcess() {
    //add reservation.
    $countVoters = 0;
    $maxVoters = $this->_surveyDetails['max_number_of_contacts'] ?? NULL;
    $activityStatus = CRM_Core_PseudoConstant::activityStatus('name');
    $statusHeld = array_search('Scheduled', $activityStatus);

    $reservedVoterIds = [];
    foreach ($this->_contactIds as $cid) {
      $subject = $this->_surveyDetails['title'] . ' - ' . ts('Respondent Reservation');
      $session = CRM_Core_Session::singleton();
      $activityParams = [
        'source_contact_id' => $session->get('userID'),
        'assignee_contact_id' => [$this->_interviewerId],
        'target_contact_id' => [$cid],
        'source_record_id' => $this->_surveyId,
        'activity_type_id' => $this->_surveyDetails['activity_type_id'],
        'subject' => $subject,
        'activity_date_time' => date('YmdHis'),
        'status_id' => $statusHeld,
        'skipRecentView' => 1,
        'campaign_id' => $this->_surveyDetails['campaign_id'] ?? NULL,
      ];
      $activity = CRM_Activity_BAO_Activity::create($activityParams);
      if ($activity->id) {
        $countVoters++;
        $reservedVoterIds[$cid] = $cid;
      }
      if ($maxVoters && ($maxVoters <= ($this->_numVoters + $countVoters))) {
        break;
      }
    }

    //add reserved voters to groups.
    $groupAdditions = $this->_addRespondentToGroup($reservedVoterIds);

    // Success message
    if ($countVoters > 0) {
      $status = '<p>' . ts("%count contact has been reserved.", ['plural' => '%count contacts have been reserved.', 'count' => $countVoters]) . '</p>';
      if ($groupAdditions) {
        $status .= '<p>' . ts('They have been added to %1.',
            [1 => implode(' ' . ts('and') . ' ', $groupAdditions)]
          ) . '</p>';
      }
      CRM_Core_Session::setStatus($status, ts('Reservation Added'), 'success');
    }
    // Error message
    if (count($this->_contactIds) > $countVoters) {
      CRM_Core_Session::setStatus(ts('Reservation did not add for %count contact.',
        [
          'plural' => 'Reservation did not add for %count contacts.',
          'count' => (count($this->_contactIds) - $countVoters),
        ]
      ), ts('Notice'));
    }

    //get ready to jump to voter interview form.
    $buttonName = $this->controller->getButtonName();
    if (!empty($reservedVoterIds) &&
      $buttonName == '_qf_Reserve_next_reserveToInterview'
    ) {
      $this->controller->set('surveyId', $this->_surveyId);
      $this->controller->set('contactIds', $reservedVoterIds);
      $this->controller->set('interviewerId', $this->_interviewerId);
      $this->controller->set('reserveToInterview', TRUE);
    }
  }

  /**
   * @param array $contactIds
   *
   * @return array
   */
  private function _addRespondentToGroup($contactIds) {
    $groupAdditions = [];
    if (empty($contactIds)) {
      return $groupAdditions;
    }

    $params = $this->controller->exportValues($this->_name);
    $groups = $params['groups'] ?? [];
    $newGroupName = $params['newGroupName'] ?? NULL;
    $newGroupDesc = $params['newGroupDesc'] ?? NULL;

    $newGroupId = NULL;
    //create new group.
    if ($newGroupName) {
      $grpParams = [
        'title' => $newGroupName,
        'description' => $newGroupDesc,
        'is_active' => TRUE,
      ];
      $group = CRM_Contact_BAO_Group::create($grpParams);
      $groups[] = $newGroupId = $group->id;
    }

    //add the respondents to groups.
    if (is_array($groups)) {
      $existingGroups = CRM_Core_PseudoConstant::group();
      foreach ($groups as $groupId) {
        $addCount = CRM_Contact_BAO_GroupContact::addContactsToGroup($contactIds, $groupId);
        $totalCount = $addCount[1] ?? NULL;
        if ($groupId == $newGroupId) {
          $name = $newGroupName;
        }
        else {
          $name = $existingGroups[$groupId];
        }
        if ($totalCount) {
          $url = CRM_Utils_System::url('civicrm/group/search',
            'reset=1&force=1&context=smog&gid=' . $groupId
          );
          $groupAdditions[] = '<a href="' . $url . '">' . $name . '</a>';
        }
      }
    }

    return $groupAdditions;
  }

}
