<?php

require_once ACF_QTRANSLATE_PLUGIN_DIR . 'src/acf_interface.php';

class acf_qtranslate_acf_5 implements acf_qtranslate_acf_interface {

	/**
	 * The plugin instance.
	 * @var \acf_qtranslate_plugin
	 */
	protected $plugin;


	/*
	 * Create an instance.
	 * @return void
	 */
	public function __construct($plugin) {
		$this->plugin = $plugin;

		add_filter('acf/format_value',                array($this, 'format_value'));
		add_action('acf/include_fields',              array($this, 'include_fields'));
		add_action('acf/input/admin_enqueue_scripts', array($this, 'admin_enqueue_scripts'));
	}

	/**
	 * Load javascript and stylesheets on admin pages.
	 */
	public function include_fields() {
		require_once ACF_QTRANSLATE_PLUGIN_DIR . 'src/acf_5/fields/file.php';
		require_once ACF_QTRANSLATE_PLUGIN_DIR . 'src/acf_5/fields/image.php';
		require_once ACF_QTRANSLATE_PLUGIN_DIR . 'src/acf_5/fields/text.php';
		require_once ACF_QTRANSLATE_PLUGIN_DIR . 'src/acf_5/fields/textarea.php';
		require_once ACF_QTRANSLATE_PLUGIN_DIR . 'src/acf_5/fields/wysiwyg.php';

		acf()->fields->register_field_type(new acf_qtranslate_acf_5_text($this->plugin));
		acf()->fields->register_field_type(new acf_qtranslate_acf_5_textarea($this->plugin));
		acf()->fields->register_field_type(new acf_qtranslate_acf_5_wysiwyg($this->plugin));
		acf()->fields->register_field_type(new acf_qtranslate_acf_5_image($this->plugin));
		acf()->fields->register_field_type(new acf_qtranslate_acf_5_file($this->plugin));
	}

	/**
	 * Load javascript and stylesheets on admin pages.
	 */
	public function admin_enqueue_scripts() {
		wp_enqueue_script('acf_qtranslate_main',   plugins_url('/assets/acf_5/main.js', ACF_QTRANSLATE_PLUGIN), array('acf-input','underscore'));
	}

	/**
	 * This filter is applied to the $value after it is loaded from the db and
	 * before it is returned to the template via functions such as get_field().
	 */
	public function format_value($value) {
		if (is_string($value)) {
			$value = qtrans_useCurrentLanguageIfNotFoundUseDefaultLanguage($value);
		}
		return $value;
	}

	/**
	 * Get the visible ACF fields.
	 * @return array
	 */
	public function get_visible_acf_fields($widget_id = null) {
		global $wp_registered_widgets;

		$visible_fields = array();

		// build field group filters required for current screen
		$filter = $this->get_acf_field_group_filters();
		if (count($filter) === 0) {
			return $visible_fields;
		}

		// widgets need some special handling since they
		// require multiple acf_get_field_group_visibility()
		// calls in order to return all the visible fields
		if (acf_is_screen('widgets') || acf_is_screen('customize')) {
			if ($widget_id) {
				$filter['widget'] = _get_widget_id_base($widget_id);
			}
			else {
				// process each widget form individually for any visible fields
				foreach ($wp_registered_widgets as $widget) {
					$visible_fields += $this->get_visible_acf_fields($widget['id']);
				}
				return $visible_fields;
			}
		}

		$supported_field_types = array(
			'email',
			'text',
			'textarea',
			'repeater',
			'flexible_content',
			'qtranslate_file',
			'qtranslate_image',
			'qtranslate_text',
			'qtranslate_textarea',
			'qtranslate_wysiwyg'
		);

		foreach (acf_get_field_groups($filter) as $field_group) {
			$fields = acf_get_fields($field_group);
			foreach ($fields as $field) {
				if (in_array($field['type'], $supported_field_types)) {
					$visible_fields[] = array('id' => 'acf-' . $field['key']);
				}
			}
		}

		return $visible_fields;
	}

	/**
	 * Get field group filters based on active screen.
	 */
	public function get_acf_field_group_filters() {
		global $post, $pagenow, $typenow, $plugin_page;

		$filter = array();
		if ($pagenow === 'post.php' || $pagenow === 'post-new.php') {
			if ($typenow !== 'acf') {
				$filter['post_id'] = $post->ID;
				$filter['post_type'] = $typenow;
			}
		}
		elseif ($pagenow === 'admin.php' && isset($plugin_page)) {
			if (acf_get_options_page($plugin_page)) {
				$filter['post_id'] = acf_get_valid_post_id('options');
			}
		}
		elseif ($pagenow === 'edit-tags.php' && isset($_GET['taxonomy'])) {
			$filter['taxonomy'] = filter_var($_GET['taxonomy'], FILTER_SANITIZE_STRING);
		}
		elseif ($pagenow === 'profile.php') {
			$filter['user_id'] = get_current_user_id();
			$filter['user_form'] = 'edit';
		}
		elseif ($pagenow === 'user-edit.php' && isset($_GET['user_id'])) {
			$filter['user_id'] = filter_var($_GET['user_id'], FILTER_SANITIZE_NUMBER_INT);
			$filter['user_form'] = 'edit';
		}
		elseif ($pagenow === 'user-new.php') {
			$filter['user_id'] = 'new';
			$filter['user_form'] = 'edit';
		}
		elseif ($pagenow === 'media.php' || $pagenow === 'upload.php') {
			$filter['attachment'] = 'All';
		}
		elseif (acf_is_screen('widgets') || acf_is_screen('customize')) {
			$filter['widget'] = 'all';
		}

		return $filter;
	}

}