<?php

/**
 * Class ifor integrating landingpage CPT with ACF4 & ACF5
 * @package ACF
 */

class Landing_Pages_ACF {

	/**
	 * Name under which the transient for the current tab will be saved.
	 * @var string
	 */
	static $_transient_name = 'acf_current_tab';
	/**
	 * Number of minutes the transient will be saved.
	 * @var int
	 */
	static $_transient_minutes = 5;


	/**
	 * Initialize Landing_Pages_ACF Class
	 */
	public function __construct() {
		self::load_hooks();
	}


	/**
	 * Load Hooks & Filters
	 */
	public static function load_hooks() {

		/* Load ACF Fields On ACF powered Email Template */
		add_filter( 'acf/location/rule_match/template_id' , array( __CLASS__ , 'load_acf_on_template' ) , 10 , 3 );

		/* make sure fields are placed in the correct location */
		add_action( 'save_post', array( __CLASS__ , 'save_acf_fields' ) );

		/* make sure fields are placed in the correct location */
		add_action( 'wp_restore_post_revision', array( __CLASS__ , 'restore_acf_values' ) , 10 , 2  );

		/* Adds revision fields to the revisions screen */

		/* Adds revision fields value for Inbound Settings to the revisions screen */
		add_filter( '_wp_post_revision_fields', array( __CLASS__ , 'add_revision_fields' )  );
		add_filter( '_wp_post_revision_field_inbound_settings', array( __CLASS__ , 'add_revision_field_values' ) , 10 , 3 );

		/* Intercept load custom field value request and hijack it */
		add_filter( 'acf/load_value' , array( __CLASS__ , 'load_value' ) , 11 , 3 );

		/* extra field formatting
		add_filter( 'acf/format_value' , array( __CLASS__ , 'format_value' ) , 11 , 3 ); */

		/* make sure fields are placed in the correct location */
		add_action( 'admin_print_footer_scripts', array( __CLASS__ , 'reposition_acf_fields' ) );

		/* add new location rule to ACF Field UI */
		add_filter('acf/location/rule_types', array( __CLASS__ , 'define_location_rule_types' ) );

		/* add new location rule values to ACF Field UI */
		add_filter('acf/location/rule_values/template_id', array( __CLASS__ , 'define_location_rule_values' ) );

		add_action( 'acf/input/admin_footer', array( __CLASS__ , 'handle_tab' ) );
		add_action( 'wp_ajax_acf_save_current_tab', array( __CLASS__ , 'ajax_acf_save_current_tab' ) );

	}

	/**
	 * @param $choices
	 * @return mixed
	 */
	public static function define_location_rule_types( $choices ) {

		if (!isset($choices['Basic']['template_id'])) {
			$choices['Basic']['template_id'] = __('Template ID', 'landing-page');
		}

		return $choices;
	}

	public static function define_location_rule_values( $choices ) {
		$template_ids = Landing_Pages_Load_Extensions::get_uploaded_template_ids();

		if (!isset($choices['default'])) {
			$choices[ 'default' ] = 'default';
		}

		if( $template_ids )	{
			foreach( $template_ids as $template_id )	{

				/* template ID by template name here */
				$choices[ $template_id ] = $template_id;

			}
		}

		return $choices;
	}

	/**
	 * Adds javascript to make sure ACF fields load inside template container
	 */
	public static function reposition_acf_fields() {
		global $post;

		if ( !defined('ACF_FREE') || ( !isset($post) || $post->post_type != 'landing-page' ) ) {
			return;
		}

		?>
		<script type='text/javascript'>
			jQuery('.acf_postbox').each(function(){
				jQuery('#template-display-options').append(jQuery(this));
			});
		</script>
		<?php
	}


	/**
	 * Compiles ACF Meta Data into a singular json pair for variation support
	 * @param $landing_page_id
	 */
	public static function save_acf_fields( $landing_page_id ) {


		if (  !isset($_POST['post_type']) || $_POST['post_type'] != 'landing-page' ) {
			return;
		}

		if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE ) {
			return;
		}

		/* save acf settings - uses our future data array - eventually we will migrate all post meta into this data object */
		$fields = (isset($_POST['fields'])) ? $_POST['fields'] : null;
		$fields = (isset($_POST['acf'])) ? $_POST['acf'] : $fields;

		if ( $fields ) {

			$settings = Landing_Pages_Meta::get_settings( $landing_page_id );
			$variation_id = (isset($_REQUEST['lp-variation-id'])) ? intval($_REQUEST['lp-variation-id']) : '0';

			if (!isset($settings['variations'])) {
				$settings['variations'] = array();
			}

			$settings['variations'][$variation_id]['acf'] = $fields;
			Landing_Pages_Meta::update_settings( $landing_page_id , $settings );
		}
	}

	/**
	 * Restore landing page ACF values from revision
	 * @param $post_id
	 * @param $revision_id
	 */
	public static function restore_acf_values( $post_id , $revision_id ) {

		$post = get_post($post_id);
		if($post->post_type!='landing-page' ) {
			return;
		}

		$revision_settings = Landing_Pages_Meta::get_settings( $revision_id );

		Landing_Pages_Meta::update_settings( $post_id , $revision_settings );

	}

	/**
	 * Adds revision fields to revisions screen
	 * @param $fields
	 * @return mixed
	 */
	public static function add_revision_fields( $fields ) {
		global $post;
		$fields['inbound_settings'] = __('Landing Page Settings' , 'inbound-pro');
		return $fields;
	}

	public static function add_revision_field_values( $value ,  $field  , $revision) {

		if (!isset($revision->ID)) {
			return $value;
		}

		$settings = Landing_Pages_Meta::get_settings( $revision->ID );

		return json_encode($settings);
	}

	/**
	 * Although unused at the moment, this method can be used for filtering the return value with ACF5 fields
	 * @param $value
	 * @param $post_id
	 * @param $field
	 * @return mixed
	 */
	public static function format_value( $value, $post_id, $field ) {
		return $value;
	}

	/**
	 * Finds the correct value given the variation
	 *
	 * @param MIXED $value contains the non-variation value
	 * @param INT $post_id ID of landing page being loaded
	 * @param ARRAY $field wide array of data belonging to custom field (not leveraged in this method)
	 *
	 * @returns MIXED $new_value value mapped to variation.
	 */
	public static function load_value( $value, $post_id, $field ) {
		global $post;

		if ( !isset($post) || $post->post_type != 'landing-page' ) {
			return $value;
		}

		$vid = Landing_Pages_Variations::get_new_variation_reference_id( $post->ID );

		$settings = Landing_Pages_Meta::get_settings( $post->ID );

		$variations = ( isset($settings['variations']) ) ? $settings['variations'] : null;

		/* If there is no ACF data for this template attempt to pull values from the legacy postmeta values */

		if ( !isset( $variations[ $vid ][ 'acf' ] ) || !$variations[ $vid ][ 'acf' ]) {
			return self::load_legacy_value(  $value, $post_id, $field  );
		}


		if ( isset( $variations[ $vid ][ 'acf' ] ) ) {
			$new_value = self::search_field_array( $variations[ $vid ][ 'acf' ] , $field );

			/* sometimes value is an array count when new_value believes it should be an array in this case get new count */
			if (!is_array($value) && is_array($new_value)) {
				$value = count($new_value);
			} else if($new_value) {
				if ($new_value =='_empty') {
					$new_value = '';
				}
				$value = $new_value;
			}

			/* acf lite isn't processing return values correctly - ignore repeater subfields */
			if ( !is_admin() &&  defined('ACF_FREE')  ) {
				$value = self::acf_free_value_formatting( $value , $field );

			}

			if ( !is_admin() && is_string($value) && !defined('INBOUND_DEBUG_GF_AJAX')  ) {
				$value = do_shortcode($value);
			}

			/* handle non acf5 template return formatting */
			if (defined('ACF_PRO')) {
				$value = self::acf_check_if_acf4( $value , $field );
			}

		}

		return $value;

	}
	/**
	 * Finds the correct value given the variation - uses legacy meta system
	 *
	 * @param MIXED $value contains the non-variation value
	 * @param INT $post_id ID of landing page being loaded
	 * @param ARRAY $field wide array of data belonging to custom field (not leveraged in this method)
	 *
	 * @returns MIXED $new_value value mapped to variation.
	 */
	public static function load_legacy_value( $value, $post_id, $field ) {
		global $post;

		/* get registered field object data */
		$field = self::acf_get_registered_field( $field );

		/* if a brand new post ignore return default value */
		if ( $post->post_status != 'publish' ) {
			return ( isset($field['default_value']) ) ? do_shortcode($field['default_value']) : '' ;
		}

		$vid = Landing_Pages_Variations::get_new_variation_reference_id( $post->ID );

		if ( $vid ) {
			$value = get_post_meta( $post_id ,  $field['name'] . '-' . $vid , true );
		} else {
			$value = get_post_meta( $post_id ,  $field['name']  , true );
		}


		if ($field['type']=='image' && is_admin() ) {
			$value = self::get_image_id_from_url( $value );
		}

		if ($field['type']=='date_picker') {
			$value = str_replace('-' , '', $value);
			$value = explode(' ' , $value);
			$value = $value[0];
		}

		if ($field['type']=='color_picker') {
			if (!strstr( $value , '#' ) && $value ) {
				$value = '#'.$value;
			}
		}

		if (!is_array($value) && !is_admin() ) {
			$value = do_shortcode($value);
		}

		return $value;

	}


	/**
	 * Searches ACF variation array and returns the correct field value given the field key
	 *
	 * @param ARRAY $array of custom field keys and values stored for variation
	 * @param STRING $needle acf form field key
	 *
	 * @return $feild value
	 */
	public static function search_field_array( $array , $field ) {

		$needle = $field['key'];

		foreach ($array as $key => $value ){


			if ($key === $needle && !is_array($value) ) {
				$value = ($value) ? $value : '_empty' ;
				return $value;
			}

			/* Arrays could be repeaters or any custom field with sets of multiple values */
			if ( is_array($value) ) {

				/* Check if this array contains a repeater field layouts. If it does then return layouts, else this array is a non-repeater value set so return it */
				if ( $key === $needle ) {

					$repeater_array = self::get_repeater_layouts( $value );
					if ($repeater_array) {
						return $repeater_array;
					} else	{
						return $value;
					}

				}

				/* Check if array is repeater fields and determine correct value given a parsed field name with field key */
				$repeater_value = self::get_repeater_values( $value , $field , $needle );

				/* If target key is not in these repeater fields, or this array is not determined to be a repeater field then move on. */
				if ($repeater_value) {
					return $repeater_value;
				}


			}

		}

		return false;
	}

	/**
	 *	Searches an array assumed to be a repeater field dataset and returns an array of repeater field layout definitions
	 *
	 *	@retuns ARRAY $fields this array will either be empty of contain repeater field layout definitions.
	 */
	public static function get_repeater_layouts( $array ) {

		$fields = array();

		foreach ($array as $key => $value) {
			if ( isset( $value['acf_fc_layout'] ) ) {
				$fields[] = $value['acf_fc_layout'];
			}
		}

		return $fields;
	}


	/**
	 *	Searches an array assumed to be a repeater field dataset and returns an array of repeater field layout definitions
	 *
	 *	@retuns ARRAY $fields this array will either be empty of contain repeater field layout definitions.
	 */
	public static function get_repeater_values( $array , $field , $needle ) {

		/* Discover correct repeater pointer by parsing field name */
		preg_match_all('/(_\d_)/', $field['name'], $matches, PREG_PATTERN_ORDER, 0);

		/* if not a repeater subfield then bail */
		if (!$matches || !$matches[0]) {
			return false;
		}

		$pointer = str_replace('_' , '' , $matches[0][0]);
		$repeater_key = self::key_search($array, $field , true ); /* returns parent flexible content field key using sub field key */


		/*  */
		if ( $repeater_key && $repeater_key !== '0' && isset($array[$repeater_key][$pointer][$field['key']])){
            /* if the value is empty, mark as empty */
            if($array[$repeater_key][$pointer][$field['key']] === ''){$array[$repeater_key][$pointer][$field['key']] = '_empty';}
            
			return $array[$repeater_key][$pointer][$field['key']];
		}

		/* repeater field comes after the pointer????  */
		if (isset($array[$pointer][$needle])){
            if($array[$pointer][$needle] === ''){$array[$pointer][$needle] = '_empty';}

			return $array[$pointer][$needle];
		}


        
        /* if the repeater is nested in a flexible content field */
        if(isset($matches[0][1])){
            $nested_value = null;
            $parent_field = $field['parent'];
            $sub_pointer  = str_replace('_' , '' , $matches[0][1]);
            
            if(isset($array[$pointer][$parent_field][$sub_pointer][$field['key']])){
                $nested_value = $array[$pointer][$parent_field][$sub_pointer][$field['key']];
            }
            
            /* if the nested repeater's indexes are field keys instead of numbers */
            if( isset($array[$repeater_key][$parent_field]) &&
                is_array($array[$repeater_key][$parent_field]) &&
                !isset($array[$repeater_key][$parent_field][0]))
            {
                /* get the numerical indexes of the keys */
                $keys = array_keys($array[$repeater_key][$parent_field]);
                    
                $nested_value = $array[$repeater_key][$parent_field][$keys[$sub_pointer]][$field['key']];

            }
            
            /* if the value is empty, mark it as empty */
            if($nested_value === ''){$nested_value = '_empty';}
 
            if(isset($nested_value)){
                return $nested_value;
            }
        }

		return '';

	}

	/**
	 *	Check if current post is a landing page using an ACF powered template
	 *
	 *	@filter acf/location/rule_match/template_id
	 *
	 *	@returns BOOL declaring if current page is a landing page with an ACF template loaded or not
	 */
	public static function load_acf_on_template( $allow , $rule, $args ) {
		global $post;

		if ( !isset($post) || $post->post_type != 'landing-page' ) {
			return $allow;
		}

		$template =	Landing_Pages_Variations::get_current_template( $args['post_id'] );

		if ($template == $rule['value']) {
			return true;
		} else {
			return false;
		}
	}

	/**
	 *
	 * @param $image_url
	 * @return mixed
	 */
	public static function get_image_id_from_url($url) {
		$dir = wp_upload_dir();

		// baseurl never has a trailing slash
		if ( false === strpos( $url, $dir['baseurl'] . '/' ) ) {
			// URL points to a place outside of upload directory
			return false;
		}

		$file  = basename( $url );
		$query = array(
				'post_type'  => 'attachment',
				'fields'     => 'ids',
				'meta_query' => array(
						array(
								'value'   => $file,
								'compare' => 'LIKE',
						),
				)
		);

		$query['meta_query'][0]['key'] = '_wp_attached_file';

		// query attachments
		$ids = get_posts( $query );

		if ( ! empty( $ids ) ) {

			foreach ( $ids as $id ) {

				// first entry of returned array is the URL
				if ( $url === array_shift( wp_get_attachment_image_src( $id, 'full' ) ) )
					return $id;
			}
		}

		$query['meta_query'][0]['key'] = '_wp_attachment_metadata';

		// query attachments again
		$ids = get_posts( $query );

		if ( empty( $ids) )
			return false;

		foreach ( $ids as $id ) {

			$meta = wp_get_attachment_metadata( $id );

			foreach ( $meta['sizes'] as $size => $values ) {

				if ( $values['file'] === $file && $url === array_shift( wp_get_attachment_image_src( $id, $size ) ) )
					return $id;
			}
		}

		return false;
	}

	public static function acf_get_registered_field( $field ) {
		global $acf_register_field_group;

		if (!$acf_register_field_group) {
			return $field;
		}

		foreach ($acf_register_field_group as $key => $group) {
			foreach ( $group['fields'] as $this_field ) {
				if ( $this_field['name'] == $field['name'] ){
					return $this_field;
				}
			}
		}
	}


	/**
	 * Correct return value formatting when Pro is NOT installed
	 */
	public static function acf_free_value_formatting( $value , $field ) {

		if ($field['type'] == 'image' && $field['return_format'] == 'url' && !strstr($value , 'http' ) ) {
			$image_array = wp_get_attachment_image_src( $value , 'full' );
			return $image_array[0];
		}

		if ($field['type'] == 'file' && $field['return_format'] == 'url' && !strstr($value , 'http' ) ) {
			return wp_get_attachment_url( $value );
		}

		if ($field['type'] == 'wysiwyg') {
			$vaue = wpautop($value);
			$vaue = do_shortcode($value);
		}

		return $value;
	}

	/**
	 * checks template data type
	 * @param $value
	 * @param $field
	 * @return mixed
	 */
	public static function acf_check_if_acf4( $value , $field ) {
		global $key, $lp_data;

		if (!isset($lp_data[$key])) {
			return $value;
		}

		if ( $lp_data[$key]['info']['data_type'] == 'acf4' ) {
			return self::acf_free_value_formatting($value , $field);
		} else {
			return $value;
		}
	}


	/**
	 * This is a complicated array search method for working with ACF repeater fields.
	 * @param $array
	 * @param $field
	 * @param bool|false $get_parent if get_parent is set to true to will return the parent field group key of the repeater fields
	 * @param mixed $last_key placeholder for storing the last key...
	 * @return bool|int|string
	 */
	public static function key_search($array, $field , $get_parent = false , $last_key = false) {
		$value = false;

		foreach ($array as $key => $item) {
			if ($key === $field['key'] ) {
				$value = $item;
			} else {
				if (is_array($item)) {
					$last_key = ( !is_numeric($key)) ? $key : $last_key;
					$value = self::key_search($item, $field , $get_parent , $last_key );
				}
			}

			if ($value) {
				if (!$get_parent) {
					return $value;
				} else {
					return $last_key;
				}

			}
		}

		return false;
	}

	/**
	 * Select tab that was selected in last edit session of the post.
	 *
	 * - If the time the same post that was last edited lies within the time the
	 *   transient exists, the last selected tab will be selected via JavaScript.
	 * - If a new post is opened for editing, the current tab will be overwritten.
	 */
	public static function handle_tab() {
		// Run only when post_id is present
		if ( ! isset( $_GET['post'] ) || ! is_numeric( $_GET['post'] ) ) {
			return;
		}
		$post_id = sanitize_key( $_GET['post'] );
		// Check for existing transient
		$current_tab = get_transient( self::$_transient_name );
		// Use value only once, delete transient right away
		delete_transient( self::$_transient_name );
		// The first tab is selected by default
		$tab_index = 0;
		// Get tab index for current post
		if ( $current_tab['post_id'] === $post_id ) {
			$tab_index = $current_tab['tab_index'];
		}
		?>
		<script type="text/javascript">
			(function($) {
				/**
				 * Global to save the current index of selected tab
				 * @type int
				 */
				window.acf_current_tab_index = null;
				acf.add_action('ready', function( $el ){
					var tabIndex = <?php echo $tab_index; ?>
					// Get tab element by index
					var $li = $('.acf-tab-group').find('li:eq(<?php echo $tab_index; ?>)');
					// Select tab only when it’s not the first tab, which is selected by default
					if (0 !== tabIndex) {
						$li.find('a').click();
					}
					window.acf_current_tab_index = tabIndex;
				});
				acf.add_action('refresh', function($tabGroup) {
					var $currentTab;
					var currentTabIndex = window.acf_current_tab_index;
					var newTabIndex;
					// Bail out if we have no jQuery object
					if (false === $tabGroup instanceof jQuery) {
						return;
					}
					$currentTab = $tabGroup.find('li.active');
					// Bail out if no active tab was found
					if ($currentTab.length === 0) {
						return;
					}
					// Get index of active tab
					newTabIndex = $currentTab.index();
					// Bail out if index is initial or previously selected tab is the same
					if (null === currentTabIndex || newTabIndex === currentTabIndex) {
						return;
					}
					window.acf_current_tab_index = newTabIndex;
					// Send tabIndex to backend to save transient
					$.ajax(ajaxurl, {
						method: 'post',
						data: {
							action: 'acf_save_current_tab',
							tab_index: newTabIndex,
							post_id: <?php echo $post_id; ?>
						}
					});
				});
			})(jQuery);
		</script>
		<?php
	}
	public static function ajax_acf_save_current_tab() {
		if ( ! isset( $_POST['tab_index'] ) || ! is_numeric( $_POST['tab_index'] ) ) {
			return;
		}
		$tab_index = sanitize_text_field($_POST['tab_index']);
		$post_id = $_POST['post_id'];
		$transient_value = array(
			'tab_index' => $tab_index,
			'post_id' => $post_id,
		);
		$result = set_transient( self::$_transient_name, $transient_value, self::$_transient_minutes * 60 );
		if ( $result ) {
			wp_send_json_success();
		}
		wp_die();
	}

}

/**
 *	Initialize ACF Integrations
 */

new Landing_Pages_ACF();