<?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       |
 +--------------------------------------------------------------------+
 */

/**
 * This class generates form components for relationship.
 */
class CRM_Contact_Form_Relationship extends CRM_Core_Form {

  use CRM_Custom_Form_CustomDataTrait;

  /**
   * The relationship id, used when editing the relationship
   *
   * @var int
   */
  public $_relationshipId;

  /**
   * The contact id, used when add/edit relationship
   *
   * @var int
   */
  public $_contactId;

  /**
   * This is a string which is either a_b or  b_a  used to determine the relationship between to contacts
   * @var string
   */
  public $_rtype;

  /**
   * This is a string which is used to determine the relationship between to contacts
   * @var string
   */
  public $_rtypeId;

  /**
   * Display name of contact a
   * @var string
   */
  public $_display_name_a;

  /**
   * Display name of contact b
   * @var string
   */
  public $_display_name_b;

  /**
   * The relationship type id
   *
   * @var int
   */
  public $_relationshipTypeId;

  /**
   * An array of all relationship names
   *
   * @var array
   */
  public $_allRelationshipNames;

  /**
   * @var bool
   */
  public $_enabled;

  /**
   * @var bool
   */
  public $_isCurrentEmployer;

  /**
   * @var string
   */
  public $_contactType;

  /**
   * The relationship values if Updating relationship
   * @var array
   */
  public $_values;

  /**
   * Case id if it called from case context
   * @var int
   */
  public $_caseId;

  /**
   * Explicitly declare the form context.
   */
  public function getDefaultContext() {
    return 'create';
  }

  /**
   * Explicitly declare the entity api name.
   */
  public function getDefaultEntity() {
    return 'Relationship';
  }

  public function preProcess() {
    $this->_contactId = $this->get('contactId');

    $this->_contactType = CRM_Core_DAO::getFieldValue('CRM_Contact_DAO_Contact', $this->_contactId, 'contact_type');

    $this->_relationshipId = $this->get('id');

    $this->_rtype = CRM_Utils_Request::retrieve('rtype', 'String', $this);

    $this->_rtypeId = CRM_Utils_Request::retrieve('relTypeId', 'String', $this);

    $this->_display_name_a = CRM_Core_DAO::getFieldValue('CRM_Contact_DAO_Contact', $this->_contactId, 'display_name');

    $this->assign('display_name_a', $this->_display_name_a);
    //get the relationship values.
    $this->_values = [];
    if ($this->_relationshipId) {
      $params = ['id' => $this->_relationshipId];
      CRM_Core_DAO::commonRetrieve('CRM_Contact_DAO_Relationship', $params, $this->_values);
    }

    // Check for permissions
    if (in_array($this->_action, [CRM_Core_Action::ADD, CRM_Core_Action::UPDATE, CRM_Core_Action::DELETE])) {
      if (!CRM_Contact_BAO_Contact_Permission::allow($this->_contactId, CRM_Core_Permission::EDIT)
        && !CRM_Contact_BAO_Contact_Permission::allow($this->_values['contact_id_b'], CRM_Core_Permission::EDIT)) {
        CRM_Core_Error::statusBounce(ts('You do not have the necessary permission to edit this contact.'));
      }
    }

    // Set page title based on action
    switch ($this->_action) {
      case CRM_Core_Action::VIEW:
        $this->setTitle(ts('View Relationship for %1', [1 => $this->_display_name_a]));
        break;

      case CRM_Core_Action::ADD:
        $this->setTitle(ts('Add Relationship for %1', [1 => $this->_display_name_a]));
        break;

      case CRM_Core_Action::UPDATE:
        $this->setTitle(ts('Edit Relationship for %1', [1 => $this->_display_name_a]));
        break;

      case CRM_Core_Action::DELETE:
        $this->setTitle(ts('Delete Relationship for %1', [1 => $this->_display_name_a]));
        break;
    }

    $this->_caseId = CRM_Utils_Request::retrieve('caseID', 'Integer', $this);

    if (!$this->_rtypeId) {
      $params = CRM_Utils_Request::exportValues();
      if (isset($params['relationship_type_id'])) {
        $this->_rtypeId = $params['relationship_type_id'];
      }
      elseif (!empty($this->_values)) {
        $this->_rtypeId = $this->_values['relationship_type_id'] . '_' . $this->_rtype;
      }
    }

    //get the relationship type id
    $this->_relationshipTypeId = str_replace(['_a_b', '_b_a'], ['', ''], $this->_rtypeId);

    //get the relationship type
    if (!$this->_rtype) {
      $this->_rtype = str_replace($this->_relationshipTypeId . '_', '', $this->_rtypeId);
    }

    //need to assign custom data subtype to the template for the initial load of custom fields.
    $this->assign('customDataSubType', $this->_relationshipTypeId);
    $this->assign('entityID', $this->_relationshipId);

    //use name as it remain constant, CRM-3336
    $this->_allRelationshipNames = CRM_Core_PseudoConstant::relationshipType('name');

    // Current employer?
    if ($this->_action & CRM_Core_Action::UPDATE) {
      if ($this->_allRelationshipNames[$this->_relationshipTypeId]["name_a_b"] == 'Employee of') {
        $this->_isCurrentEmployer = $this->_values['contact_id_b'] == CRM_Core_DAO::getFieldValue('CRM_Contact_DAO_Contact', $this->_values['contact_id_a'], 'employer_id');
      }
    }

    if ($this->isSubmitted()) {
      // The custom data fields are added to the form by an ajax form.
      // However, if they are not present in the element index they will
      // not be available from `$this->getSubmittedValue()` in post process.
      // We do not have to set defaults or otherwise render - just add to the element index.
      $this->addCustomDataFieldsToForm('Relationship', array_filter([
        'id' => $this->getRelationshipID(),
        'relationship_type_id' => $this->_relationshipTypeId,
      ]));
    }
  }

  /**
   * @api supported for use from outside core.
   *
   * @return int|null
   */
  public function getRelationshipID(): ?int {
    return $this->_relationshipId;
  }

  /**
   * Set default values for the form.
   */
  public function setDefaultValues() {
    $defaults = [];

    if ($this->_action & CRM_Core_Action::UPDATE) {
      if (!empty($this->_values)) {
        $defaults['relationship_type_id'] = $this->_rtypeId;
        $defaults['start_date'] = $this->_values['start_date'] ?? NULL;
        $defaults['end_date'] = $this->_values['end_date'] ?? NULL;
        $defaults['description'] = $this->_values['description'] ?? NULL;
        $defaults['is_active'] = $this->_values['is_active'] ?? NULL;

        // The postprocess function will swap these fields if it is a b_a relationship, so we compensate here
        $defaults['is_permission_a_b'] = $this->_values['is_permission_' . $this->_rtype] ?? NULL;
        $defaults['is_permission_b_a'] = $this->_values['is_permission_' . strrev($this->_rtype)] ?? NULL;

        $defaults['is_current_employer'] = $this->_isCurrentEmployer;

        // Load info about the related contact
        $contact = new CRM_Contact_DAO_Contact();
        if ($this->_rtype == 'a_b' && $this->_values['contact_id_a'] == $this->_contactId) {
          $contact->id = $this->_values['contact_id_b'];
        }
        else {
          $contact->id = $this->_values['contact_id_a'];
        }
        if ($contact->find(TRUE)) {
          $defaults['related_contact_id'] = $contact->id;
          $this->_display_name_b = $contact->display_name;
          $this->assign('display_name_b', $this->_display_name_b);
        }

        $noteParams = [
          'entity_id' => $this->_relationshipId,
          'entity_table' => 'civicrm_relationship',
          'limit' => 1,
          'version' => 3,
        ];
        $note = civicrm_api('Note', 'getsingle', $noteParams);
        $defaults['note'] = $note['note'] ?? NULL;
      }
    }
    else {
      $defaults['is_active'] = $defaults['is_current_employer'] = 1;
      $defaults['relationship_type_id'] = $this->_rtypeId;
      $defaults['is_permission_a_b'] = $defaults['is_permission_b_a'] = CRM_Contact_BAO_Relationship::NONE;
    }

    $this->_enabled = $defaults['is_active'];
    return $defaults;
  }

  /**
   * Add the rules for form.
   */
  public function addRules() {
    if (!($this->_action & CRM_Core_Action::DELETE)) {
      $this->addFormRule(['CRM_Contact_Form_Relationship', 'dateRule']);
    }
  }

  /**
   * Build the form object.
   */
  public function buildQuickForm() {
    if ($this->_action & CRM_Core_Action::DELETE) {
      $this->addButtons([
        [
          'type' => 'next',
          'name' => ts('Delete'),
          'isDefault' => TRUE,
        ],
        [
          'type' => 'cancel',
          'name' => ts('Cancel'),
        ],
      ]);
      return;
    }

    // Select list
    $relationshipList = CRM_Contact_BAO_Relationship::getContactRelationshipType($this->_contactId, $this->_rtype, $this->_relationshipId);

    $this->assign('contactTypes', CRM_Contact_BAO_ContactType::contactTypeInfo(TRUE));

    foreach ($this->_allRelationshipNames as $id => $vals) {
      if ($vals['name_a_b'] === 'Employee of') {
        $this->assign('employmentRelationship', $id);
        break;
      }
    }

    $this->addField(
      'relationship_type_id',
      [
        'options' => ['' => ts('- select -')] + $relationshipList,
        'class' => 'huge',
        'placeholder' => ts('- select -'),
        'option_url' => 'civicrm/admin/reltype',
        'option_context' => [
          'contact_id' => $this->_contactId,
          'relationship_direction' => $this->_rtype,
          'relationship_id' => $this->_relationshipId,
          'is_form' => TRUE,
        ],
      ],
      TRUE
    );

    $label = $this->_action & CRM_Core_Action::ADD ? ts('Contact(s)') : ts('Contact');
    $contactField = $this->addField('related_contact_id', ['label' => $label, 'name' => 'contact_id_b', 'multiple' => TRUE, 'create' => TRUE], TRUE);
    // This field cannot be updated
    if ($this->_action & CRM_Core_Action::UPDATE) {
      $contactField->freeze();
    }

    $this->add('advcheckbox', 'is_current_employer', $this->_contactType == 'Organization' ? ts('Current Employee') : ts('Current Employer'));

    $this->addField('start_date', ['label' => ts('Start Date')], FALSE, FALSE);
    $this->addField('end_date', ['label' => ts('End Date')], FALSE, FALSE);

    $this->addField('is_active', ['label' => ts('Enabled?'), 'type' => 'advcheckbox']);

    $this->addField('is_permission_a_b', [], TRUE);
    $this->addField('is_permission_b_a', [], TRUE);

    $this->addField('description', ['label' => ts('Description')]);

    CRM_Contact_Form_Edit_Notes::buildQuickForm($this);

    if ($this->_action & CRM_Core_Action::VIEW) {
      $this->addButtons([
        [
          'type' => 'cancel',
          'name' => ts('Done'),
        ],
      ]);
    }
    else {
      // make this form an upload since we don't know if the custom data injected dynamically is of type file etc.
      $this->addButtons([
        [
          'type' => 'upload',
          'name' => ts('Save Relationship'),
          'isDefault' => TRUE,
        ],
        [
          'type' => 'cancel',
          'name' => ts('Cancel'),
        ],
      ]);
    }
  }

  /**
   * This function is called when the form is submitted and also from unit test.
   *
   * @param array $params
   *
   * @return array
   * @throws \CRM_Core_Exception
   */
  public function submit($params) {
    switch ($this->getAction()) {
      case CRM_Core_Action::DELETE:
        $this->deleteAction($this->_relationshipId);
        return [];

      case CRM_Core_Action::UPDATE:
        return $this->updateAction($params);

      default:
        return $this->createAction($params);
    }
  }

  /**
   * This function is called when the form is submitted.
   */
  public function postProcess() {
    // Store the submitted values in an array.
    $params = $this->getSubmittedValues();

    $values = $this->submit($params);
    if (empty($values)) {
      return;
    }
    [$params, $relationshipIds] = $values;

    // if this is called from case view,
    //create an activity for case role removal.CRM-4480
    // @todo this belongs in the BAO.
    if ($this->_caseId) {
      CRM_Case_BAO_Case::createCaseRoleActivity($this->_caseId, $relationshipIds, $params['contact_check'], $this->_contactId);
    }

    // @todo this belongs in the BAO.
    $note = !empty($params['note']) ? $params['note'] : '';
    $this->saveRelationshipNotes($relationshipIds, $note);

    // Refresh contact tabs which might have been affected
    $this->ajaxResponse = [
      'reloadBlocks' => ['#crm-contactinfo-content'],
    ];
  }

  /**
   * Date validation.
   *
   * @param array $params
   *   (reference ) an assoc array of name/value pairs.
   *
   * @return bool|array
   *   mixed true or array of errors
   */
  public static function dateRule($params) {
    $errors = [];

    // check start and end date
    if (!empty($params['start_date']) && !empty($params['end_date'])) {
      if ($params['end_date'] < $params['start_date']) {
        $errors['end_date'] = ts('The relationship end date cannot be prior to the start date.');
      }
    }

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

  /**
   * Set Status message to reflect outcome of the update action.
   *
   * @param array $outcome
   *   Outcome of save action - including
   *   - 'valid' : Number of valid relationships attempted.
   *   - 'invalid' : Number of invalid relationships attempted.
   *   - 'duplicate' : Number of duplicate relationships attempted.
   *   - 'saved' : boolean of whether save was successful
   */
  protected function setMessage($outcome) {
    if (!empty($outcome['valid']) && empty($outcome['saved'])) {
      CRM_Core_Session::setStatus(ts('Relationship created.', [
        'count' => $outcome['valid'],
        'plural' => '%count relationships created.',
      ]), ts('Saved'), 'success');
    }
    if (!empty($outcome['invalid'])) {
      CRM_Core_Session::setStatus(ts('%count relationship record was not created due to an invalid contact type.', [
        'count' => $outcome['invalid'],
        'plural' => '%count relationship records were not created due to invalid contact types.',
      ]), ts('%count invalid relationship record', [
        'count' => $outcome['invalid'],
        'plural' => '%count invalid relationship records',
      ]));
    }
    if (!empty($outcome['duplicate'])) {
      CRM_Core_Session::setStatus(ts('One relationship was not created because it already exists.', [
        'count' => $outcome['duplicate'],
        'plural' => '%count relationships were not created because they already exist.',
      ]), ts('%count duplicate relationship', [
        'count' => $outcome['duplicate'],
        'plural' => '%count duplicate relationships',
      ]));
    }
    if (!empty($outcome['saved'])) {
      CRM_Core_Session::setStatus(ts('Relationship record has been updated.'), ts('Saved'), 'success');
    }
  }

  /**
   * @param array $relationshipList
   *
   * @return array
   */
  public static function getRelationshipTypeMetadata($relationshipList) {
    $contactTypes = CRM_Contact_BAO_ContactType::contactTypeInfo(TRUE);
    $allRelationshipNames = CRM_Core_PseudoConstant::relationshipType('name');
    $jsData = [];
    // Get just what we need to keep the dom small
    $whatWeWant = array_flip([
      'contact_type_a',
      'contact_type_b',
      'contact_sub_type_a',
      'contact_sub_type_b',
    ]);
    foreach ($allRelationshipNames as $id => $vals) {
      if (isset($relationshipList["{$id}_a_b"]) || isset($relationshipList["{$id}_b_a"])) {
        $jsData[$id] = array_filter(array_intersect_key($allRelationshipNames[$id], $whatWeWant));
        // Add user-friendly placeholder
        foreach (['a', 'b'] as $x) {
          $type = !empty($jsData[$id]["contact_sub_type_$x"]) ? $jsData[$id]["contact_sub_type_$x"] : (CRM_Utils_Array::value("contact_type_$x", $jsData[$id]));
          $jsData[$id]["placeholder_$x"] = $type ? ts('- select %1 -', [strtolower($contactTypes[$type]['label'])]) : ts('- select contact -');
        }
      }
    }
    return $jsData;
  }

  /**
   * Handling 'delete relationship' action
   *
   * @param int $id
   *   Relationship ID
   */
  private function deleteAction($id) {
    CRM_Contact_BAO_Relationship::deleteRecord(['id' => $id]);
    CRM_Core_Session::setStatus(ts('Selected relationship has been deleted successfully.'), ts('Record Deleted'), 'success');

    // reload all blocks to reflect this change on the user interface.
    $this->ajaxResponse['reloadBlocks'] = ['#crm-contactinfo-content'];
  }

  /**
   * Handling updating relationship action
   *
   * @param array $params
   *
   * @return array
   * @throws \CRM_Core_Exception
   */
  private function updateAction($params) {
    [$params, $_] = $this->preparePostProcessParameters($params);
    try {
      civicrm_api3('relationship', 'create', $params);
    }
    catch (CRM_Core_Exception $e) {
      throw new CRM_Core_Exception('Relationship create error ' . $e->getMessage());
    }

    $this->setMessage(['saved' => TRUE]);
    return [$params, [$this->_relationshipId]];
  }

  /**
   * Handling creating relationship action
   *
   * @param array $params
   *
   * @return array
   * @throws \CRM_Core_Exception
   */
  private function createAction($params) {
    [$params, $primaryContactLetter] = $this->preparePostProcessParameters($params);

    $outcome = CRM_Contact_BAO_Relationship::createMultiple($params, $primaryContactLetter);

    $relationshipIds = $outcome['relationship_ids'];

    $this->setMessage($outcome);

    return [$params, $relationshipIds];
  }

  /**
   * Prepares parameters to be used for create/update actions
   *
   * @param array $values
   *
   * @return array
   */
  private function preparePostProcessParameters($values) {
    $params = $values;
    [$relationshipTypeId, $a, $b] = explode('_', $params['relationship_type_id']);

    $params['relationship_type_id'] = $relationshipTypeId;
    $params['contact_id_' . $a] = $this->_contactId;

    if (empty($this->_relationshipId)) {
      $params['contact_id_' . $b] = explode(',', $params['related_contact_id']);
    }
    else {
      $params['id'] = $this->_relationshipId;
      $params['contact_id_' . $b] = $params['related_contact_id'];
    }

    // If this is a b_a relationship these form elements are flipped
    $params['is_permission_a_b'] = $values["is_permission_{$a}_{$b}"] ?? 0;
    $params['is_permission_b_a'] = $values["is_permission_{$b}_{$a}"] ?? 0;

    return [$params, $a];
  }

  /**
   * Updates/Creates relationship notes
   *
   * @param array $relationshipIds
   * @param string $note
   *
   * @throws \CRM_Core_Exception
   */
  private function saveRelationshipNotes($relationshipIds, $note) {
    foreach ($relationshipIds as $id) {
      $noteParams = [
        'entity_id' => $id,
        'entity_table' => 'civicrm_relationship',
      ];

      $existing = civicrm_api3('note', 'get', $noteParams);
      if (!empty($existing['id'])) {
        $noteParams['id'] = $existing['id'];
      }

      $action = NULL;
      if (!empty($note)) {
        $action = 'create';
        $noteParams['note'] = $note;
        $noteParams['contact_id'] = $this->_contactId;
      }
      elseif (!empty($noteParams['id'])) {
        $action = 'delete';
      }

      if (!empty($action)) {
        civicrm_api3('note', $action, $noteParams);
      }
    }
  }

}
