<?php
class WPML_ACF_Field_Annotations {

	/**
	 * WPML_ACF_Field_Annotations constructor.
	 *
	 * @param WPML_ACF_Options_Page $WPML_ACF_Options_Page
	 */
	public function __construct( WPML_ACF_Options_Page $WPML_ACF_Options_Page ) {
		$this->WPML_ACF_Options_Page = $WPML_ACF_Options_Page;


	}

	/**
	 * Registers WP hooks related to field annotations.
	 */
	public function register_hooks() {
		if ( !defined( 'ACFML_HIDE_FIELD_ANNOTATIONS' ) || ACFML_HIDE_FIELD_ANNOTATIONS != true ) {
			add_action( 'acf/create_field', array( $this, 'acf_create_field' ), 10, 2 );
			add_action( 'acf/render_field', array( $this, 'acf_create_field' ), 10, 2 );
			add_filter( 'wpml_post_edit_settings_custom_field_description', array( $this, 'metabox_field_description' ), 10, 3 );
		}
	}

	/**
	 * @param array $field   The ACF field.
	 * @param mixed $post_id Current post ID.
	 */
	public function acf_create_field($field, $post_id = null) {
		if ( $this->WPML_ACF_Options_Page->is_acf_options_page() ) {
			return;
		}

        if ( null == $post_id ) {
            $post_id = get_the_ID();
        }

        if ( $post_id ) {
        	$this->field_original_value($field, $post_id);
			$this->display_translated_warning($field);
        }
	}

	/**
	 * Displays HTML code with information about original value of the field.
	 *
	 * @param array $field   The ACF field.
	 * @param mixed $post_id Current post ID.
	 */
	private function field_original_value($field, $post_id) {
		if ( $this->is_secondary_language() ) {
			$custom_field_original_data = apply_filters('wpml_custom_field_original_data', null, $post_id, $field['_name'] );
			if ( ! empty( $custom_field_original_data['value'] ) && is_string( $custom_field_original_data['value'] ) ) {
				echo "<div class='wpml_acf_original_value'>";
				echo "<strong>" . __("Field's value in original language", "acfml") . ":</strong><br>";
				echo strip_tags( $custom_field_original_data['value'] );
				echo "</div>";
			}
		}
	}

	private function display_translated_warning($field) {
		static $run_times = array();

        if ( !isset( $field['key'] ) ) {
            return;
        }

		if (!isset($run_times[ $field['key'] ]) || $run_times[ $field['key'] ] == 0) {
			$has_element_with_display_translated = false;

			if ( $this->is_secondary_language() ) {

				$field_object = $this->resolve_field($field);

				if ($field_object) {
					$has_element_with_display_translated = $field_object->has_element_with_display_translated($has_element_with_display_translated, $field);
				}
			}

			if ($has_element_with_display_translated == true) {
				echo "<div class='wpml_acf_annotation ". $field_object->field_type() ."'>";
				_e("<strong>Warning</strong>: This field allows to select post type or taxonomy which you set in WPML translation options to 'Translatable - use translation if available or fallback to default language '. Whatever you set in this field for a secondary language post (this post) will be ignored and values from original post will be used (if you set to copy or duplicate value for this field).", "acfml");
				echo "</div>";
			}


		}
		$run_times[ $field['key'] ] = isset( $run_times[ $field['key'] ] ) ? $run_times[ $field['key'] ] + 1 : 1;
	}

	private function is_secondary_language() {
		$current_language = apply_filters('wpml_current_language', null);
		$default_language = apply_filters('wpml_default_language', null);

		return $current_language != $default_language;
	}

	private function resolve_field($field) {

		$field_object = false;

		// stub data, not used in this context
		$processed_data = new stdClass();
		$processed_data->meta_value = null;
		$processed_data->target_lang = null;
		$processed_data->meta_data = null;
		$processed_data->related_acf_field_value = null;
		$ids_object = new stdClass();

		if (isset($field['class']) && $field['class'] == 'post_object') {
			$field_object = new WPML_ACF_Post_Object_Field($processed_data, $ids_object);
		} else if (isset($field['class']) && $field['class'] == 'page_link') {
			$field_object = new WPML_ACF_Page_Link_Field($processed_data, $ids_object);
		} else if (isset($field['class']) && $field['class'] == 'relationship') {
			$field_object = new WPML_ACF_Relationship_Field($processed_data, $ids_object);
		} else if (isset($field['class']) && $field['class'] == 'taxonomy') {
			$field_object = new WPML_ACF_Taxonomy_Field($processed_data, $ids_object);
		} else if (isset($field['class']) && $field['class'] ==  'gallery') {
			$field_object = new WPML_ACF_Post_Object_Field($processed_data, $ids_object);
		}


		return $field_object;
	}

	public function metabox_field_description( $description, $name, $post_id ) {

        $field_object = get_field_object( $name, $post_id );

        if ( $field_object && isset( $field_object['label'] ) && isset( $field_object['type'] ) ) {
            $field_data = array(
                __("ACF field name:", "acfml"),
                $field_object['label'],
                __("ACF field type:", "acfml"),
                $field_object['type']
            );
            $description .=  implode(" ", $field_data) ;
        }

        return $description;
    }
}