<?php

namespace Drupal\cig_pods\Form;

Use Drupal\Core\Form\FormBase;
Use Drupal\Core\Form\FormStateInterface;

class ProjectForm extends FormBase {



    public function getAwardeeOptions(){
        $awardee_assets = \Drupal::entityTypeManager() -> getStorage('asset') -> loadByProperties(
            ['type' => 'awardee']
        );
        $awardee_options = array();
        $awardee_keys = array_keys($awardee_assets);
        foreach($awardee_keys as $awardee_key) {
          $asset = $awardee_assets[$awardee_key];
          $awardee_options[$awardee_key] = $asset->getName();
        }

        return $awardee_options;
    }


    # Making this function dynamically pull contact names breaks AJAX calls.
    public function getAwardeeContactNameOptions(){
        $contact_name_options = array();
        $contact_name_options[''] = ' - Select -';
        $contact_name_options['aw'] = 'Agatha Wallace';

        return $contact_name_options;
    }

    // TODO: improvement: Make this dynamic
    public function getAwardeeContactTypeOptions(){
        $contact_type_options[''] = '- Select -';
        $contact_type_options['0'] = 'Awardee Administrative Contact';
        $contact_type_options['1'] = 'Awardee Principal Contact';
        $contact_type_options['2'] = 'Awardee Technical Contact';


        return $contact_type_options;
    }

    public function getResourceConcernOptions(){
        $resource_concern_options = [];
        $resource_concern_terms = \Drupal::entityTypeManager() -> getStorage('taxonomy_term') -> loadByProperties(
            ['vid' => 'd_resource_concern']
         );

         $resource_concern_keys = array_keys($resource_concern_terms);

         foreach($resource_concern_keys as $resource_concern_key) {
           $term = $resource_concern_terms[$resource_concern_key];
           $resource_concern_options[$resource_concern_key] = $term -> getName();
         }

        return $resource_concern_options;
    }

    public function getGrantTypeOptions(){

        $grant_type_terms = \Drupal::entityTypeManager() -> getStorage('taxonomy_term') -> loadByProperties(
            [
                'vid' => 'd_grant_type',
            ]
        );

        $grant_type_options = [];
        $grant_type_keys = array_keys($grant_type_terms);

        foreach($grant_type_keys as $grant_type_key) {
            $term = $grant_type_terms[$grant_type_key];
            $grant_type_options[$grant_type_key] = $term -> getName();
        }
        return $grant_type_options;
    }

    public function buildProjectInformationSection(array &$form, FormStateInterface &$form_state, $options = NULL){
        $form['form_title'] = [
            '#markup' => '<h1 id="form-title">Project Information</h1>'
        ];

        $form['subform_1'] = [
            '#markup' => '<div class="subform-title-container"><h2>General Project Information</h2><h4>7 Fields | Section 1 of 3</h4></div>'
        ];

        $form['project_name'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Project Name'),
            '$description' => 'Project Name',
            '#required' => FALSE
        ];

        $form['agreement_number'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Agreement Number'),
            '$description' => 'Agreement Number',
            '#required' => FALSE
        ];

        // Start: Taxonomy term loaded dynamically example
        $grant_type_options = $this->getGrantTypeOptions();

        $form['grant_type'] = [
            '#type' => 'select',
            '#title' => $this
              ->t('Grant Type'),
            '#options' => $grant_type_options,
            '#required' => FALSE
        ];
        // End: Taxonomy term loaded dynamically example

        $form['funding_amount'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Funding Amount'),
            '$description' => 'Funding Amount',
            '#required' => FALSE
        ];

        $resource_concern_options = $this->getResourceConcernOptions();
        $form['resource_concern'] = [
          '#type' => 'checkboxes',
          '#title' => t('Possible Resource Concerns'),
          '#options' => $resource_concern_options,
          '#required' => FALSE,
          '#required' => FALSE,
        ];

        $form['project_summary'] = [
            '#type' => 'textarea',
            '#title' => $this->t('Project Summary'),
            '$description' => 'Project Summary',
            '#required' => FALSE
        ];

    }
   /**
   * {@inheritdoc}
   */
    public function buildForm(array $form, FormStateInterface $form_state, $options = NULL){

        $form['#attached']['library'][] = 'cig_pods/project_entry_form';

        $num_contact_lines = $form_state->get('num_contact_lines');//get num of contacts showing on screen. (1->n exclude:removed indexes)
        $num_contacts = $form_state->get('num_contacts');//get num of added contacts. (1->n)
        $removed_contacts = $form_state->get('removed_contacts');//get removed contacts indexes

        if ($num_contacts === NULL) {//initialize number of contact, set to 1
            $form_state->set('num_contacts', 1);
            $num_contacts = $form_state->get('num_contacts');
        }
        if ($num_contact_lines === NULL) {
            $form_state->set('num_contact_lines', 1);
            $num_contact_lines = $form_state->get('num_contact_lines');
        }

        if ($removed_contacts === NULL) {
            $form_state->set('removed_contacts', array());//initialize arr
            $removed_contacts = $form_state->get('removed_contacts');
        }


        $num_producer_lines = $form_state->get('num_producer_lines');
        $num_producers = $form_state->get('num_producers');
        $removed_producers = $form_state->get('removed_producers');

        if ($num_producer_lines == NULL){
            $form_state->set('num_producer_lines', 1);
            $num_producer_lines = $form_state->get('num_producer_lines');
        }

        if ($num_producers === NULL) {
            $form_state->set('num_producers', 1);
            $num_producers = $form_state->get('num_producers');
        }

        if($removed_producers === NULL ){
            $form_state->set('removed_producers', array());
            $removed_producers = $form_state->get('removed_producers');
        }



        /* Variables declaration end*/

        $this->buildProjectInformationSection($form, $form_state);

        $awardee_options = $this->getAwardeeOptions();
        $contact_name_options = $this->getAwardeeContactNameOptions();
        $contact_type_options = $this->getAwardeeContactTypeOptions();
        /* Awardee Information */
        $form['subform_2'] = [
            '#markup' => '<div class="subform-title-container"><h2>Awardee Information</h2><h4>Section 2215 of 3</h4></div>'
        ];

        $form['organization_name'] = [
            '#type' => 'select',
            '#title' => 'Awardee Organization Name',
            '#options' => $awardee_options,
            '#required' => TRUE
        ];


        // $contact_name_options = $this->getAwardeeContactNameOptions();
        $form['#tree'] = TRUE;
        $form['names_fieldset'] = [
          '#prefix' => '<div id="names-fieldset-wrapper"',
          '#suffix' => '</div>',
        ];



        for ($i = 0; $i < $num_contacts; $i++) {//num_contacts: get num of added contacts. (1->n)

            if (in_array($i, $removed_contacts)) {// Check if field was removed
                continue;
            }

            $form['names_fieldset'][$i]['contact_name'] = [
                '#type' => 'select',
                '#title' => $this
                  ->t("Contact Name"),
                '#options' => $contact_name_options,
                'attributes' => [
                    'class' => 'something',
                ],
                '#prefix' => ($num_contact_lines > 1) ? '<div class="inline-components-short">' : '<div class="inline-components">',
                '#suffix' => '</div>',
            ];

            $form['names_fieldset'][$i]['contact_type'] = [
                '#type' => 'select',
                '#title' => $this
                  ->t('Contact Type'),
                '#options' => $contact_type_options,
                '#prefix' => '<div class="inline-components"',
                '#suffix' => '</div>',
            ];

            if($num_contact_lines > 1 && $i!=0){
                $form['names_fieldset'][$i]['actions'] = [
                    '#type' => 'submit',
                    '#value' => $this->t('Delete'),
                    '#name' => $i,
                    '#submit' => ['::removeContactCallback'],
                    '#ajax' => [
                      'callback' => '::addContactRowCallback',
                      'wrapper' => 'names-fieldset-wrapper',
                    ],
                    "#limit_validation_errors" => array(),
                    '#prefix' => '<div class="remove-button-container">',
                    '#suffix' => '</div>',
                ];
            }

            //css space for a new line due to previous items' float left attr
            $form['names_fieldset'][$i]['new_line_container'] = [
                '#markup' => '<div class="clear-space"></div>'
            ];

        }

        $form['actions'] = [
            '#type' => 'actions',
        ];

        $form['names_fieldset']['actions']['add_name'] = [
            '#type' => 'submit',
            '#button_type' => 'button',
            '#name' => 'add_contact_button',
            '#value' => t('Add Another Contact'),
            '#submit' => ['::addContactRow'],
            '#ajax' => [
                'callback' => '::addContactRowCallback',
                'wrapper' => 'names-fieldset-wrapper',
            ],
            '#states' => [
                'visible' => [
                  ":input[name='names_fieldset[0][contact_name]']" => ['!value' => ''],
                  "and",
                  ":input[name='names_fieldset[0][contact_type]']" => ['!value' => ''],
                ],
            ],
            "#limit_validation_errors" => array(),
            '#prefix' => '<div id="addmore-button-container">',
            '#suffix' => '</div>',
        ];

        /* Producers Information */
        $form['subform_3'] = [
            '#markup' => '<div class="subform-title-container"><h2>Producers</h2><h4>Section 5 of 3</h4></div>'
        ];


        $form['producers_fieldset'] = [
            '#prefix' => '<div id="producers-fieldset-wrapper"',
            '#suffix' => '</div>',
          ];
        for($i = 0; $i < $num_producers; $i++){
            if(in_array($i,$removed_producers)){
                continue;
            }

            $form['producers_fieldset'][$i]['producer_name'] = [
                '#type' => 'textfield',
                '#title' => $this
                  ->t("Producer Name"),
            ];
            $form['names_fieldset'][$i]['new_line_container'] = [
                '#markup' => '<div class="clear-space"></div>'
            ];
        }
        $form['producers_fieldset']['actions']['add_producer'] = [
            '#type' => 'submit',
            '#button_type' => 'button',
            '#name' => 'add_producer_button',
            '#value' => t('Add Another Producer'),
            '#submit' => ['::addProducerRow'],
            '#ajax' => [
                'callback' => '::addProducerRowCallback',
                'wrapper' => 'producers-fieldset-wrapper',
            ],
            '#states' => [
                'visible' => [
                  ":input[name='producers_fieldset[0][producer_name]']" => ['!value' => ''],
                ],
            ],
            "#limit_validation_errors" => array(),
            '#prefix' => '<div id="addmore-button-container">',
            '#suffix' => '</div>',
        ];

        // $form['producer_contact_name'] = [
        //  '#type' => 'textfield',
        //  '#title' => $this->t('Producer Contact Name'),
        //  '$description' => 'Producer Contact Name',
        //  '#required' => TRUE
        // ];
        /* Producers Information Ends*/


        // $this->buildProducerInformationSection($form, $form_state, $options);
        $form_state->setCached(FALSE);

        $form['actions']['save'] = [
            '#type' => 'submit',
            '#value' => $this->t('Save'),
        ];

        $form['actions']['cancel'] = [
            '#type' => 'submit',
            '#value' => $this->t('Cancel'),
        ];

        return $form;
    }

  /**
   * {@inheritdoc}
   */
  public function validateForm(array &$form, FormStateInterface $form_state){
    return;
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {

    if($form_state['values']['op'] == t('Save')){
        $this
        ->messenger()
        ->addStatus($this
        ->t('Form submitted for project @project_name', [
            '@project_name' => $form['project_name']['#value'],
        ])
        );
    }
  }

  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'project_create_form';
  }

  public function addContactRowCallback(array &$form, FormStateInterface $form_state) {
    return $form['names_fieldset'];
  }
  public function addProducerRowCallback(array &$form, FormStateInterface $form_state) {
    return $form['producers_fieldset'];
  }

  public function addProducerRow(array &$form, FormStateInterface $form_state){
      $num_producers = $form_state->get('num_producers');
      $num_producer_lines = $form_state->get('num_producer_lines');
      $form_state->set('num_producers', $num_producers + 1);
      $form_state->set('num_producer_lines',$num_producer_lines + 1);
      $form_state->setRebuild();
  }


  public function addContactRow(array &$form, FormStateInterface $form_state) {
    $num_field = $form_state->get('num_contacts');
    $num_line = $form_state->get('num_contact_lines');
    $add_button = $num_field + 1;
    $form_state->set('num_contacts', $add_button);
    $form_state->set('num_contact_lines', $num_line + 1);
    $form_state->setRebuild();
  }

  public function removeContactCallback(array &$form, FormStateInterface $form_state) {
    $trigger = $form_state->getTriggeringElement();
    $num_line = $form_state->get('num_contact_lines');
    $indexToRemove = $trigger['#name'];

    // Remove the fieldset from $form (the easy way)
    unset($form['names_fieldset'][$indexToRemove]);

    // Keep track of removed fields so we can add new fields at the bottom
    // Without this they would be added where a value was removed
    $removed_contacts = $form_state->get('removed_contacts');
    $removed_contacts[] = $indexToRemove;
    $form_state->set('removed_contacts', $removed_contacts);
    $form_state->set('num_contact_lines', $num_line - 1);

    // Rebuild form_state
    $form_state->setRebuild();
  }
}