<?php

if ( ! class_exists( 'GFForms' ) ) {
	die();
}

if ( ! class_exists( 'GFResults' ) ) {

	class GFResults {
		protected $_slug;
		protected $_title;
		protected $_icon;
		protected $_callbacks;
		protected $_capabilities;
		protected $_search_title;

		public function __construct( $slug, $config ) {
			$this->_slug         = $slug;
			$this->_title        = rgar( $config, 'title' );
			$this->_icon         = rgar( $config, 'icon' );
			$this->_search_title = rgempty( 'search_title', $config ) ? esc_html__( 'Results Filters', 'gravityforms' ) : rgar( $config, 'search_title' );
			$this->_callbacks    = isset( $config['callbacks'] ) ? $config['callbacks'] : array();
			$this->_capabilities = isset( $config['capabilities'] ) ? $config['capabilities'] : array();
		}

		public function init() {

			if ( ! GFCommon::current_user_can_any( $this->_capabilities ) ) {
				return;
			}

			// is any GF page
			if ( GFForms::is_gravity_page() ) {

				// add top toolbar menu item
				add_filter( 'gform_toolbar_menu', array( $this, 'add_toolbar_menu_item' ), 10, 2 );

				// add custom form action
				add_filter( 'gform_form_actions', array( $this, 'add_form_action' ), 10, 2 );

			}

			// is results page
			if ( rgget( 'view' ) == "gf_results_{$this->_slug}" ) {

				// add the results view
				add_action( 'gform_entries_view', array( $this, 'add_view' ), 10, 2 );
				add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_admin_scripts' ) );

				// tooltips
				require_once( GFCommon::get_base_path() . '/tooltips.php' );
				add_filter( 'gform_tooltips', array( $this, 'add_tooltips' ) );

			}

		}

		public function enqueue_admin_scripts() {
			wp_enqueue_script( 'jquery-ui-resizable' );
			wp_enqueue_script( 'jquery-ui-datepicker' );

			wp_enqueue_script( 'google_charts' );
			wp_enqueue_style( 'gaddon_results_css' );
			wp_enqueue_script( 'gaddon_results_js' );
			$this->localize_results_scripts();
		}

		public static function localize_results_scripts() {

			// Get current page protocol
			$protocol = isset( $_SERVER['HTTPS'] ) ? 'https://' : 'http://';
			// Output admin-ajax.php URL with same protocol as current page

			$vars = array(
				'ajaxurl'   => admin_url( 'admin-ajax.php', $protocol ),
				'imagesUrl' => GFCommon::get_base_url() . '/images'
			);

			wp_localize_script( 'gaddon_results_js', 'gresultsVars', $vars );

			$strings = array(
				'ajaxError' => esc_html__( 'Error retrieving results. If the problem persists, please contact support.', 'gravityforms' )
			);

			wp_localize_script( 'gaddon_results_js', 'gresultsStrings', $strings );

		}

		private function get_fields( $form ) {
			return isset( $this->_callbacks['fields'] ) ? call_user_func( $this->_callbacks['fields'], $form ) : $form['fields'];
		}

		public function add_form_action( $actions, $form_id ) {
			return $this->filter_menu_items( $actions, $form_id, true );
		}

		public function add_toolbar_menu_item( $menu_items, $form_id ) {
			return $this->filter_menu_items( $menu_items, $form_id, false );
		}

		public function filter_menu_items( $menu_items, $form_id, $compact ) {
			$form_meta      = GFFormsModel::get_form_meta( $form_id );
			$results_fields = $this->get_fields( $form_meta );
			if ( false === empty( $results_fields ) ) {
				$form_id    = $form_meta['id'];
				$link_class = '';
				if ( rgget( 'page' ) == 'gf_new_form' ) {
					$link_class = 'gf_toolbar_disabled';
				} elseif ( rgget( 'page' ) == 'gf_entries' && rgget( 'view' ) == 'gf_results_' . $this->_slug ) {
					$link_class = 'gf_toolbar_active';
				}

				$id = rgget( 'id' );
				if ( empty( $id ) ) {
					//on the form list page, do not use icons
					$icon = '';
				} else {
					$icon = $this->_icon;
					if ( empty( $icon ) ) {
						$icon = '<i class="fa fa-bar-chart-o fa-lg"></i>';
					}
				}

				$sub_menu_items   = array();
				$sub_menu_items[] = array(
					'label'        => $this->_title,
					'icon'         => $icon,
					'title'        => esc_html__( 'View results generated by this form', 'gravityforms' ),
					'link_class'   => $link_class,
					'url'          => admin_url( "admin.php?page=gf_entries&view=gf_results_{$this->_slug}&id={$form_id}" ),
					'capabilities' => $this->_capabilities,
				);

				$duplicate_submenus = wp_filter_object_list( rgars( $menu_items, 'results/sub_menu_items' ), array( 'label' => $sub_menu_items[0]['label'] ) );
				if ( count( $duplicate_submenus ) > 0 ) {
					return $menu_items;
				}

				// If there's already a menu item with the key "results" then merge the two.
				if ( isset( $menu_items['results'] ) ) {
					$existing_link_class = $menu_items['results']['link_class'];
					$link_class == empty( $existing_link_class ) ? $link_class : $existing_link_class;
					$existing_capabilities                   = $menu_items['results']['capabilities'];
					$merged_capabilities                     = array_merge( $existing_capabilities, $this->_capabilities );
					$existing_sub_menu_items                 = $menu_items['results']['sub_menu_items'];
					$merged_sub_menu_items                   = array_merge( $existing_sub_menu_items, $sub_menu_items );
					$menu_items['results']['link_class']     = $link_class;
					$menu_items['results']['capabilities']   = $merged_capabilities;
					$menu_items['results']['sub_menu_items'] = $merged_sub_menu_items;
					$menu_items['results']['label']          = esc_html__( 'Results', 'gravityforms' );
					$menu_items['results']['icon']           = '<i class="fa fa-bar-chart-o fa-lg"></i>';

				} else {
					// so far during the page cycle this is the only menu item for this key
					$menu_items['results'] = array(
						'label'          => $compact ? esc_html__( 'Results', 'gravityforms' ) : $this->_title,
						'icon'           => $icon,
						'title'          => esc_attr__( 'View results generated by this form', 'gravityforms' ),
						'url'            => '',
						'onclick'        => 'return false;',
						'onkeypress'     => 'return false;',
						'menu_class'     => 'gf_form_toolbar_results',
						'link_class'     => $link_class,
						'capabilities'   => $this->_capabilities,
						'sub_menu_items' => $sub_menu_items,
						'priority'       => 750,
					);
				}
			}

			return $menu_items;
		}


		public function add_view( $view, $form_id ) {
			if ( $view == 'gf_results_' . $this->_slug ) {
				$form_id = absint( $form_id );
				GFResults::results_page( $form_id, $this->_title, 'gf_entries', $view );
			}
		}

		public function results_page( $form_id, $page_title, $gf_page, $gf_view ) {
			$form_id = absint( $form_id );
			if ( empty( $form_id ) ) {
				$forms = RGFormsModel::get_forms();
				if ( ! empty( $forms ) ) {
					$form_id = $forms[0]->id;
				}
			}
			$form = GFFormsModel::get_form_meta( $form_id );
			$form = gf_apply_filters( array( 'gform_form_pre_results', $form_id ), $form );

			// Set up filter vars
			$start_date = preg_replace( '/[^0-9-]/', '', rgget( 'start' ) );
			$end_date   = preg_replace( '/[^0-9-]/', '', rgget( 'end' ) );

			$all_fields = $form['fields'];

			$filter_settings = GFCommon::get_field_filter_settings( $form );
			$filter_settings = apply_filters( 'gform_filters_pre_results', $filter_settings, $form );
			$filter_settings = array_values( $filter_settings ); // reset the numeric keys in case some filters have been unset

			$filter_fields    = rgget( 'f' );
			$filter_operators = rgget( 'o' );
			$filter_values    = rgget( 'v' );
			$filters          = array();

			$init_vars = array();
			if ( ! empty( $filter_fields ) ) {
				$init_vars['mode'] = rgget( 'mode' );
				foreach ( $filter_fields as $i => $filter_field ) {
					$filters[ $i ]['field']    = $filter_field;
					$filters[ $i ]['operator'] = $filter_operators[ $i ];
					$filters[ $i ]['value']    = $filter_values[ $i ];
				}
				$init_vars['filters'] = $filters;
			}
			$min = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG || isset( $_GET['gform_debug'] ) ? '' : '.min';
			$admin_css_url = GFCommon::get_base_url() . "/css/admin{$min}.css?ver=" . GFForms::$version;
			?>
			<script type="text/javascript">
				var gresultsFields = <?php echo json_encode( $all_fields ); ?>;
				var gresultsFilterSettings = <?php echo json_encode( $filter_settings ); ?>;
				var gresultsInitVars = <?php echo json_encode( $init_vars ); ?>;

				<?php GFCommon::gf_global() ?>
				<?php GFCommon::gf_vars() ?>
			</script>

			<link rel="stylesheet"
			      href="<?php echo esc_url( $admin_css_url ); ?>"
			      type="text/css"/>
			<div class="wrap gforms_edit_form <?php echo GFCommon::get_browser_class() ?>">

				<?php GFCommon::form_page_title( $form ); ?>
				<?php GFCommon::display_dismissible_message(); ?>
				<?php GFForms::top_toolbar(); ?>
				<?php if ( false === empty( $all_fields ) ) : ?>

					<div id="poststuff" class="metabox-holder has-right-sidebar">
						<div id="side-info-column" class="inner-sidebar">
							<div id="gresults-results-filter" class="postbox">
								<h3 style="cursor: default;"><?php echo $this->_search_title ?></h3>

								<div id="gresults-results-filter-content">
									<form id="gresults-results-filter-form" action="" method="GET">
										<?php wp_nonce_field( 'gf_results', '_gf_results_nonce' );  ?>
										<input type="hidden" id="gresults-page-slug" name="page"
										       value="<?php echo esc_attr( $gf_page ); ?>">
										<input type="hidden" id="gresults-view-slug" name="view"
										       value="<?php echo esc_attr( $gf_view ); ?>">
										<input type="hidden" id="gresults-form-id" name="id"
										       value="<?php echo esc_attr( $form_id ); ?>">

										<?php
										$filter_ui = array(
											'fields'     => array(
												'label'   => esc_attr__( 'Filters', 'gravityforms' ),
												'tooltip' => 'gresults_filters',
												'markup'  => '<div id="gresults-results-field-filters-container">
																<!-- placeholder populated by js -->
															 </div>'
											),
											'date_range' => array(
												'label'   => esc_attr__( 'Date Range', 'gravityforms' ),
												'tooltip' => 'gresults_date_range',
												'markup'  => '<div style="width:90px; float:left; ">
																	<label
																		for="gresults-results-filter-date-start">' .  esc_html__( 'Start', 'gravityforms' ) . '</label>
																	<input type="text" id="gresults-results-filter-date-start" name="start"
																		   style="width:80px"
																		   class="gresults-datepicker"
																		   value="' . esc_attr( $start_date ) . '"/>
																</div>
																<div style="width:90px; float:left; ">
																	<label
																		for="gresults-results-filter-date-end">' . esc_html__( 'End', 'gravityforms' ) . '</label>
																	<input type="text" id="gresults-results-filter-date-end" name="end"
																		   style="width:80px"
																		   class="gresults-datepicker"
																		   value="' . esc_attr( $end_date ) . '"/>
																</div>'
											)

										);

										$filter_ui = apply_filters( 'gform_filter_ui', $filter_ui, $form_id, $page_title, $gf_page, $gf_view );

										foreach ( $filter_ui as $name => $filter ) {
											?>
											<div class='gresults-results-filter-section-label'>
												<?php echo $filter['label'] ?>
												&nbsp;<?php gform_tooltip( rgar( $filter, 'tooltip' ), 'tooltip_bottomleft' ) ?>
											</div>
											<?php
											echo $filter['markup'];
										}

										?>

										<br style="clear:both"/>

										<div id="gresults-results-filter-buttons">
											<input type="submit" id="gresults-results-filter-submit-button"
											       class="button button-primary button-large"
											       value="<?php esc_attr_e( 'Apply filters', 'gravityforms' ); ?>">
											<input type="button" id="gresults-results-filter-clear-button"
											       class="button button-secondary button-large"
											       value="<?php esc_attr_e( 'Clear', 'gravityforms' ); ?>"
											       onclick="gresults.clearFilterForm();"
											       onkeypress="gresults.clearFilterForm();">

											<div class="gresults-filter-loading"
											     style="display:none; float:right; margin-top:5px;">
												<i class='gficon-gravityforms-spinner-icon gficon-spin'></i>
											</div>
										</div>
									</form>
								</div>
							</div>
						</div>
					</div>
					<div class="gresults-filter-loading" style="display:none;margin:0 5px 10px 0;">
						<i class='gficon-gravityforms-spinner-icon gficon-spin'></i>&nbsp;
						<a href="javascript:void(0);" onclick="javascript:gresultsAjaxRequest.abort()" onkeypress="javascript:gresultsAjaxRequest.abort()"><?php esc_html_e( 'Cancel', 'gravityforms' ); ?></a>
					</div>

					<div id="gresults-results-wrapper">
						<div id="gresults-results">&nbsp;
						</div>
					</div>

				<?php
				else :
					_e( 'This form does not have any fields that can be used for results', 'gravityforms' );
				endif ?>
			</div>


		<?php
		}

		public static function add_tooltips( $tooltips ) {
			$tooltips['gresults_total_score']          = '<h6>' . esc_html__( 'Total Score', 'gravityforms' ) . '</h6>' . esc_html__( 'Scores are weighted calculations. Items ranked higher are given a greater score than items that are ranked lower. The total score for each item is the sum of the weighted scores.', 'gravityforms' );
			$tooltips['gresults_agg_rank']             = '<h6>' . esc_html__( 'Aggregate Rank', 'gravityforms' ) . '</h6>' . esc_html__( 'The aggregate rank is the overall rank for all entries based on the weighted scores for each item.', 'gravityforms' );
			$tooltips['gresults_date_range']           = '<h6>' . esc_html__( 'Date Range', 'gravityforms' ) . '</h6>' . esc_html__( 'Date Range is optional, if no date range is specified it will be ignored.', 'gravityforms' );
			$tooltips['gresults_filters']              = '<h6>' . esc_html__( 'Filters', 'gravityforms' ) . '</h6>' . esc_html__( 'Narrow the results by adding filters. Note that some field types support more options than others.', 'gravityforms' );
			$tooltips['gresults_average_row_score']    = '<h6>' . esc_html__( 'Average Row Score', 'gravityforms' ) . '</h6>' . esc_html__( 'The average (mean) score for each row: the sum of all the scores for each row divided by the total number of entries.', 'gravityforms' );
			$tooltips['gresults_average_global_score'] = '<h6>' . esc_html__( 'Average Global Score', 'gravityforms' ) . '</h6>' . esc_html__( 'The average (mean) score for the whole field. The sum of the total scores divided by the number of entries.', 'gravityforms' );
			$tooltips['gresults_average_score']        = '<h6>' . esc_html__( 'Average Score', 'gravityforms' ) . '</h6>' . esc_html__( 'The average (mean) score: The sum of the scores divided by the number of entries.', 'gravityforms' );

			return $tooltips;
		}


		public function ajax_get_results() {

			check_ajax_referer( 'gf_results', '_gf_results_nonce' );

			if ( ! GFAPI::current_user_can_any( $this->_capabilities ) ) {
				wp_die( 'Not allowed' );
			}

			// tooltips
			require_once( GFCommon::get_base_path() . '/tooltips.php' );
			add_filter( 'gform_tooltips', array( $this, 'add_tooltips' ) );

			$output                    = array();
			$html                      = '';
			$form_id                   = rgpost( 'id' );
			$form_id                   = absint( $form_id );
			$form                      = GFFormsModel::get_form_meta( $form_id );
			$form                      = gf_apply_filters( array( 'gform_form_pre_results', $form_id ), $form );
			$search_criteria['status'] = 'active';
			$fields                    = $this->get_fields( $form );
			$total_entries             = GFAPI::count_entries( $form_id, $search_criteria );
			if ( $total_entries == 0 ) {
				$html = esc_html__( 'No results.', 'gravityforms' );
			} else {
				$search_criteria                  = array();
				$search_criteria['field_filters'] = GFCommon::get_field_filters_from_post( $form );

				$start_date = preg_replace( '/[^0-9-]/', '', rgpost( 'start' ) );
				$end_date   = preg_replace( '/[^0-9-]/', '', rgpost( 'end' ) );

				if ( $start_date ) {
					$search_criteria['start_date'] = $start_date;
				}
				if ( $end_date ) {
					$search_criteria['end_date'] = $end_date;
				}

				$search_criteria['status'] = 'active';
				$output['s']               = http_build_query( $search_criteria );
				$state_array               = null;
				if ( isset( $_POST['state'] ) ) {
					$state               = $_POST['state'];
					$posted_check_sum    = rgpost( 'checkSum' );
					$generated_check_sum = self::generate_checksum( $state );
					$state_array         = json_decode( base64_decode( $state ), true );
					if ( $generated_check_sum !== $posted_check_sum ) {
						$output['status'] = 'complete';
						$output['html']   = esc_html__( 'There was an error while processing the entries. Please contact support.', 'gravityforms' );
						echo json_encode( $output );
						die();
					}
				}

				$data        = isset( $this->_callbacks['data'] ) ? call_user_func( $this->_callbacks['data'], $form, $fields, $search_criteria, $state_array ) : $this->get_results_data( $form, $fields, $search_criteria, $state_array );
				$entry_count = $data['entry_count'];

				if ( 'incomplete' === rgar( $data, 'status' ) ) {
					$state                 = base64_encode( json_encode( $data ) );
					$output['status']      = 'incomplete';
					$output['stateObject'] = $state;
					$output['checkSum']    = self::generate_checksum( $state );
					$output['html']        = sprintf( esc_html__( 'Entries processed: %1$d of %2$d', 'gravityforms' ), rgar( $data, 'offset' ), $entry_count );
					echo json_encode( $output );
					die();
				}

				if ( $total_entries > 0 ) {
					$html = isset( $this->_callbacks['markup'] ) ? call_user_func( $this->_callbacks['markup'], $html, $data, $form, $fields ) : '';
					if ( empty( $html ) ) {
						foreach ( $fields as $field ) {
							$field_id = $field->id;
							$html .= "<div class='gresults-results-field' id='gresults-results-field-{$field_id}'>";
							$html .= "<div class='gresults-results-field-label'>" . esc_html( GFCommon::get_label( $field ) ) . '</div>';
							$html .= '<div>' . self::get_field_results( $form_id, $data, $field, $search_criteria ) . '</div>';
							$html .= '</div>';
						}
					}
				} else {
					$html .= esc_html__( 'No results', 'gravityforms' );
				}
			}

			$output['html']           = $html;
			$output['status']         = 'complete';
			$output['searchCriteria'] = $search_criteria;
			echo json_encode( $output );
			die();
		}


		public function ajax_get_more_results() {

			check_ajax_referer( 'gf_results', '_gf_results_nonce' );

			if ( ! GFAPI::current_user_can_any( $this->_capabilities ) ) {
				wp_die( 'Not allowed' );
			}

			$form_id         = rgpost( 'form_id' );
			$field_id        = rgpost( 'field_id' );
			$offset          = rgpost( 'offset' );
			$search_criteria = rgpost( 'search_criteria' );

			if ( empty( $search_criteria ) ) {
				$search_criteria = array();
			}
			$page_size = 10;

			$form           = RGFormsModel::get_form_meta( $form_id );
			$form_id        = $form['id'];
			$field          = RGFormsModel::get_field( $form, $field_id );
			$more_remaining = false;
			$html           = self::get_default_field_results( $form_id, $field, $search_criteria, $offset, $page_size, $more_remaining );

			$response                   = array();
			$response['more_remaining'] = $more_remaining;
			$response['html']           = $html;
			$response['offset']         = $offset;

			echo json_encode( $response );
			die();
		}

		private static function generate_checksum( $data ) {
			return wp_hash( crc32( ( $data ) ) );
		}


		public static function get_total_entries( $form ) {
			$totals = RGFormsModel::get_form_counts( $form['id'] );

			return $totals['total'];
		}

		public static function get_field_results( $form_id, $data, $field, $search_criteria ) {

			if ( empty( $data['entry_count'] ) || empty ( $data['field_data'] ) ) {
				return esc_html__( 'No entries for this field', 'gravityforms' );
			}

			$field_data    = $data['field_data'];
			$entry_count   = $data['entry_count'];

			if ( empty( $field_data[ $field->id ] ) ) {
				return esc_html__( 'No entries for this field', 'gravityforms' );
			}

			$field_results = '';

			$field_type = GFFormsModel::get_input_type( $field );
			switch ( $field_type ) {
				case 'radio' :
				case 'checkbox' :
				case 'select' :
				case 'rating' :
				case 'multiselect' :
					$results          = $field_data[ $field->id ];
					$non_zero_results = is_array( $results ) ? array_filter( $results ) : $results;
					if ( empty( $non_zero_results ) ) {
						$field_results .= esc_html__( 'No entries for this field', 'gravityforms' );

						return $field_results;
					}
					$choices = $field->choices;

					$data_table    = array();
					$data_table [] = array( esc_html__( 'Choice', 'gravityforms' ), esc_html__( 'Frequency', 'gravityforms' ) );

					foreach ( $choices as $choice ) {
						$text          = $choice['text'];
						$val           = $results[ $choice['value'] ];
						$data_table [] = array( $text, $val );
					}

					$bar_height        = 40;
					$chart_area_height = ( count( $choices ) * $bar_height );

					$chart_options = array(
						'isStacked' => true,
						'height'    => ( $chart_area_height + $bar_height ),
						'chartArea' => array(
							'top'    => 0,
							'left'   => 200,
							'height' => $chart_area_height,
							'width'  => '100%',
						),
						'series'    => array(
							'0' => array(
								'color'           => 'silver',
								'visibleInLegend' => 'false',
							)
						),
						'hAxis'     => array(
							'viewWindowMode' => 'explicit',
							'viewWindow'     => array( 'min' => 0 ),
							'title'          => esc_html__( 'Frequency', 'gravityforms' ),
						)

					);

					$data_table_json = htmlentities( json_encode( $data_table ), ENT_QUOTES, 'UTF-8', true );
					$options_json    = htmlentities( json_encode( $chart_options ), ENT_QUOTES, 'UTF-8', true );
					$div_id          = 'gresults-results-chart-field-' . $field->id;
					$height          = ''; //             = sprintf("height:%dpx", (count($choices) * $bar_height));

					$field_results .= sprintf( '<div class="gresults-chart-wrapper" style="width: 100%%;%s" id=%s data-datatable=\'%s\' data-options=\'%s\' data-charttype="bar" ></div>', $height, $div_id, $data_table_json, $options_json );


					break;
				case 'likert' :
					$results         = $field_data[ $field->id ];
					$multiple_rows   = $field->gsurveyLikertEnableMultipleRows ? true : false;
					$scoring_enabled = $field->gsurveyLikertEnableScoring && class_exists( 'GFSurvey' ) ? true : false;

					$n = 100;

					$xr = 255;
					$xg = 255;
					$xb = 255;

					$yr = 100;
					$yg = 250;
					$yb = 100;

					$field_results .= "<div class='gsurvey-likert-field-results'>";
					$field_results .= "<table class='gsurvey-likert'>";
					$field_results .= '<tr>';
					if ( $multiple_rows ) {
						$field_results .= '<td></td>';
					}

					foreach ( $field->choices as $choice ) {
						$field_results .= "<td class='gsurvey-likert-choice-label'>" . $choice['text'] . '</td>';
					}

					if ( $multiple_rows && $scoring_enabled ) {
						$field_results .= sprintf( '<td>%s %s</td>', esc_html__( 'Average Score', 'gravityforms' ), gform_tooltip( 'gresults_average_row_score', null, true ) );
					}

					$field_results .= '</tr>';

					foreach ( $field->gsurveyLikertRows as $row ) {
						$row_text  = $row['text'];
						$row_value = $row['value'];
						$max       = 0;
						foreach ( $field->choices as $choice ) {
							if ( $multiple_rows ) {
								$choice_value       = rgar( $choice, 'value' );
								$results_row        = rgar( $results, $row_value );
								$results_for_choice = rgar( $results_row, $choice_value );
								$max                = max( array( $max, $results_for_choice ) );
							} else {
								$max = max( array( $max, $results[ $choice['value'] ] ) );
							}
						}

						$field_results .= '<tr>';

						if ( $multiple_rows ) {
							$field_results .= "<td class='gsurvey-likert-row-label'>" . $row_text . '</td>';
						}

						foreach ( $field->choices as $choice ) {
							$val     = $multiple_rows ? $results[ $row_value ][ $choice['value'] ] : $results[ $choice['value'] ];
							$percent = $max > 0 ? round( $val / $max * 100, 0 ) : 0;
							$red     = (int) ( ( $xr + ( ( $percent * ( $yr - $xr ) ) / ( $n - 1 ) ) ) );
							$green   = (int) ( ( $xg + ( ( $percent * ( $yg - $xg ) ) / ( $n - 1 ) ) ) );
							$blue    = (int) ( ( $xb + ( ( $percent * ( $yb - $xb ) ) / ( $n - 1 ) ) ) );
							$clr     = 'rgb(' . $red . ',' . $green . ',' . $blue . ')';
							$field_results .= "<td class='gsurvey-likert-results' style='background-color:{$clr}'>" . $val . '</td>';
						}

						if ( $multiple_rows && $scoring_enabled ) {
							$row_sum           = $results[ $row_value ]['row_score_sum'];
							$average_row_score = $row_sum == 0 ? 0 : round( $row_sum / $entry_count, 3 );
							$field_results .= "<td class='gsurvey-likert-results'>" . $average_row_score . '</td>';
						}

						$field_results .= '</tr>';

						if ( false === $multiple_rows ) {
							break;
						}
					}
					$field_results .= '</table>';
					$field_results .= '</div>';

					if ( $scoring_enabled ) {
						$sum = $results['sum_of_scores'];
						$average_score = $sum == 0 ? 0 : round( $sum / $entry_count, 3 );
						if ( $multiple_rows ) {
							$average_global_score_tooltip = gform_tooltip( 'gresults_average_global_score', null, true );
							$field_results .= sprintf( "<div class='gsurvey-likert-score'>%s %s: %s</div>", esc_html__( 'Average global score', 'gravityforms' ), $average_global_score_tooltip, $average_score );
						} else {
							$field_results .= sprintf( "<div class='gsurvey-likert-score'>%s %s: %s</div>", esc_html__( 'Average score', 'gravityforms' ), gform_tooltip( 'gresults_average_score', null, true ), $average_score );
						}
					}

					break;
				case 'rank' :
					$results = $field_data[ $field->id ];
					arsort( $results );
					$field_results .= "<div class='gsurvey-rank-field-results'>";
					$field_results .= ' <table>';
					$field_results .= "     <tr class='gresults-results-field-table-header'>";
					$field_results .= "         <td class='gresults-rank-field-label'>";
					$field_results .= esc_html__( 'Item', 'gravityforms' );
					$field_results .= '         </td>';
					$field_results .= "         <td class='gresults-rank-field-score'>";
					$field_results .= esc_html__( 'Total Score', 'gravityforms' ) . '&nbsp;' . gform_tooltip( 'gresults_total_score', null, true );
					$field_results .= '         </td>';
					$field_results .= "         <td class='gresults-rank-field-rank'>";
					$field_results .= esc_html__( 'Aggregate Rank', 'gravityforms' ) . '&nbsp;' . gform_tooltip( 'gresults_agg_rank', null, true );
					$field_results .= '         </td>';
					$field_results .= '     </tr>';

					$agg_rank = 1;
					foreach ( $results as $choice_val => $score ) {
						$field_results .= '<tr>';
						$field_results .= "      <td class='gresults-rank-field-label' style='text-align:left;'>";
						$field_results .= RGFormsModel::get_choice_text( $field, $choice_val );
						$field_results .= '      </td>';
						$field_results .= "      <td class='gresults-rank-field-score'>";
						$field_results .= $score;
						$field_results .= '      </td>';
						$field_results .= "      <td class='gresults-rank-field-rank'>";
						$field_results .= $agg_rank;
						$field_results .= '      </td>';
						$field_results .= '</tr>';
						$agg_rank ++;
					}
					$field_results .= '</table>';
					$field_results .= '</div>';

					break;
				default :
					$page_size = 5;
					$offset    = 0;
					$field_id  = $field->id;
					$more_remaining = false;
					$default_field_results = self::get_default_field_results( $form_id, $field, $search_criteria, $offset, $page_size, $more_remaining );

					$field_results .= "<div class='gresults-results-field-sub-label'>" . esc_html__( 'Latest values:', 'gravityforms' ) . '</div>';

					$field_results .= "<ul id='gresults-results-field-content-{$field_id}' class='gresults-results-field-content' data-offset='{$offset}'>";

					$field_results .= $default_field_results;
					$field_results .= '</ul>';

					if ( $more_remaining ) {
						$field_results .= "<a id='gresults-results-field-more-link-{$field_id}' class='gresults-results-field-more-link' href='javascript:void(0)' onclick='gresults.getMoreResults({$form_id},{$field_id})' onkeypress='gresults.getMoreResults({$form_id},{$field_id})'>" . esc_html__( 'Show more', 'gravityforms' ) . '</a>';
					}
					break;
			}

			return $field_results;

		}

		public function get_results_data( $form, $fields, $search_criteria = array(), $state_array = array(), $max_execution_time = 15 /* seconds */ ) {
			// todo: add hooks to modify $max_execution_time and $page_size?

			$page_size = 150;

			$time_start = microtime( true );

			$form_id     = $form['id'];
			$data        = array();
			$offset      = 0;
			$entry_count = 0;
			$field_data  = array();


			if ( $state_array ) {
				//get counts from state
				$data   = $state_array;
				$offset = (int) rgar( $data, 'offset' );

				unset( $data['offset'] );
				$entry_count = $offset;
				$field_data  = rgar( $data, 'field_data' );
			} else {
				//initialize counts
				foreach ( $fields as $field ) {
					$field_type = GFFormsModel::get_input_type( $field );
					if ( false === isset( $field->choices ) ) {
						$field_data[ $field->id ] = 0;
						continue;
					}
					$choices = $field->choices;

					if ( $field_type == 'likert' && rgar( $field, 'gsurveyLikertEnableMultipleRows' ) ) {
						foreach ( $field->gsurveyLikertRows as $row ) {
							foreach ( $choices as $choice ) {
								$field_data[ $field->id ][ $row['value'] ][ $choice['value'] ] = 0;
							}
							if ( rgar( $field, 'gsurveyLikertEnableScoring' ) ) {
								$field_data[ $field->id ][ $row['value'] ]['row_score_sum'] = 0;
							}
						}
					} else {
						if ( ! empty( $choices ) && is_array( $choices ) ) {
							foreach ( $choices as $choice ) {
								$field_data[ $field->id ][ $choice['value'] ] = 0;
							}
						} else {
							$field_data[ $field->id ] = 0;
						}
					}
					if ( $field_type == 'likert' && rgar( $field, 'gsurveyLikertEnableScoring' ) ) {
						$field_data[ $field->id ]['sum_of_scores'] = 0;
					}
				}
			}

			$count_search_leads  = GFAPI::count_entries( $form_id, $search_criteria );
			$data['entry_count'] = $count_search_leads;

			$entries_left = $count_search_leads - $offset;

			while ( $entries_left > 0 ) {

				$paging = array(
					'offset'    => $offset,
					'page_size' => $page_size,
				);

				$search_leads_time_start = microtime( true );
				$leads                   = GFFormsModel::search_leads( $form_id, $search_criteria, null, $paging );
				$search_leads_time_end   = microtime( true );
				$search_leads_time       = $search_leads_time_end - $search_leads_time_start;

				$leads_in_search = count( $leads );

				$entry_count += $leads_in_search;
				$leads_processed = 0;
				foreach ( $leads as $lead ) {

					$lead_time_start = microtime( true );
					foreach ( $fields as $field ) {
						$field_type = GFFormsModel::get_input_type( $field );
						$field_id   = $field->id;
						$value      = RGFormsModel::get_lead_field_value( $lead, $field );

						if ( $field_type == 'likert' && rgar( $field, 'gsurveyLikertEnableMultipleRows' ) ) {

							if ( empty( $value ) ) {
								continue;
							}
							foreach ( $value as $value_vector ) {
								if ( empty( $value_vector ) ) {
									continue;
								}
								list( $row_val, $col_val ) = explode( ':', $value_vector, 2 );
								if ( isset( $field_data[ $field->id ][ $row_val ] ) && isset( $field_data[ $field->id ][ $row_val ][ $col_val ] ) ) {
									$field_data[ $field->id ][ $row_val ][ $col_val ] ++;
									if ( $field->gsurveyLikertEnableScoring ) {
										$field_data[ $field->id ][ $row_val ]['row_score_sum'] += $this->get_likert_row_score( $row_val, $field, $lead );
									}
								}
							}
						} elseif ( $field_type == 'rank' ) {
							$score  = count( rgar( $field, 'choices' ) );
							$values = explode( ',', $value );
							foreach ( $values as $ranked_value ) {
								$field_data[ $field->id ][ $ranked_value ] += $score;
								$score --;
							}
						} else {

							if ( empty( $field->choices ) ) {
								if ( false === empty( $value ) ) {
									$field_data[ $field_id ] ++;
								}
								continue;
							}
							$choices = $field->choices;

							foreach ( $choices as $choice ) {
								$choice_is_selected = false;
								if ( is_array( $value ) ) {
									$choice_value = rgar( $choice, 'value' );
									if ( in_array( $choice_value, $value ) ) {
										$choice_is_selected = true;
									}
								} else {
									if ( RGFormsModel::choice_value_match( $field, $choice, $value ) ) {
										$choice_is_selected = true;
									}
								}
								if ( $choice_is_selected ) {
									$field_data[ $field_id ][ $choice['value'] ] ++;
								}
							}
						}
						if ( $field_type == 'likert' && rgar( $field, 'gsurveyLikertEnableScoring' ) ) {
							$field_data[ $field->id ]['sum_of_scores'] += $this->get_likert_score( $field, $lead );
						}
					}
					$leads_processed ++;
					$lead_time_end       = microtime( true );
					$total_execution_time = $lead_time_end - $search_leads_time_start;
					$lead_execution_time = $lead_time_end - $lead_time_start;
					if ( $total_execution_time + $lead_execution_time > $max_execution_time ) {
						break;
					}
				}
				$data['field_data'] = $field_data;
				if ( isset( $this->_callbacks['calculation'] ) ) {
					$data       = call_user_func( $this->_callbacks['calculation'], $data, $form, $fields, $leads );
					$field_data = $data['field_data'];
				}
				$offset += $leads_processed;
				$entries_left -= $leads_processed;

				$time_end       = microtime( true );
				$execution_time = ( $time_end - $time_start );

				if ( $entries_left > 0 && $execution_time + $search_leads_time > $max_execution_time ) {
					$data['status']   = 'incomplete';
					$data['offset']   = $offset;
					$progress         = $data['entry_count'] > 0 ? round( $data['offset'] / $data['entry_count'] * 100 ) : 0;
					$data['progress'] = $progress;
					break;
				}

				if ( $entries_left <= 0 ) {
					$data['status'] = 'complete';
				}
			}

			$data['timestamp'] = time();

			return $data;
		}

		public function get_likert_row_score( $row_val, $field, $entry ) {
			return is_callable( array(
				'GFSurvey',
				'get_likert_row_score',
			) ) ? GFSurvey::get_likert_row_score( $row_val, $field, $entry ) : 0;
		}

		public function get_likert_score( $field, $entry ) {
			return is_callable( array(
				'GFSurvey',
				'get_field_score',
			) ) ? GFSurvey::get_field_score( $field, $entry ) : 0;
		}


		public static function get_default_field_results( $form_id, $field, $search_criteria, &$offset, $page_size, &$more_remaining = false ) {
			$field_results = '';

			$sorting = array( 'key' => 'date_created', 'direction' => 'DESC' );

			$c = 0;

			do {
				$paging = array( 'offset' => $offset, 'page_size' => $page_size );
				$leads  = GFFormsModel::search_leads( $form_id, $search_criteria, $sorting, $paging );
				foreach ( $leads as $lead ) {

					$value = RGFormsModel::get_lead_field_value( $lead, $field );

					$content = apply_filters( 'gform_entries_field_value', $value, $form_id, $field->id, $lead );

					if ( is_array( $content ) ) {
						$content = join( ' ', $content );
					}

					if ( ! empty( $content ) ) {
						$field_results .= "<li>{$content}</li>";
						$c ++;
					}
				}
				$offset += $page_size;

			} while ( $c < $page_size && ! empty( $leads ) );

			if ( ! empty( $leads ) ) {
				$more_remaining = true;
			}

			return $field_results;

		}
	}
}
