<?php

class WCML_Multi_Currency_Reports {

	/** @var woocommerce_wpml */
	private $woocommerce_wpml;
	/** @var Sitepress */
	private $sitepress;
	/** @var wpdb */
	private $wpdb;
	/** @var WPML_WP_Cache */
	private $wpml_cache;

	/** @var string $reports_currency */
	private $reports_currency;

	/**
	 * WCML_Multi_Currency_Reports constructor.
	 *
	 * @param woocommerce_wpml $woocommerce_wpml
	 * @param SitePress $sitepress
	 * @param wpdb $wpdb
	 * @param WPML_WP_Cache $wpml_cache
	 */
	public function __construct( woocommerce_wpml $woocommerce_wpml, Sitepress $sitepress, wpdb $wpdb, $wpml_cache = null ) {

		$this->woocommerce_wpml = $woocommerce_wpml;
		$this->sitepress        = $sitepress;
		$this->wpdb             = $wpdb;

		$cache_group      = 'WCML_Multi_Currency_Reports';
		$this->wpml_cache = $wpml_cache;
		if ( null === $wpml_cache ) {
			$this->wpml_cache = new WPML_WP_Cache( $cache_group );
		}

	}

	public function add_hooks() {
		if ( is_admin() ) {
			add_filter( 'init', array( $this, 'reports_init' ) );
			add_action( 'wp_ajax_wcml_reports_set_currency', array( $this, 'set_reports_currency' ) );

			add_action( 'wc_reports_tabs', array( $this, 'reports_currency_selector' ) );

			if ( current_user_can( 'view_woocommerce_reports' ) ||
			     current_user_can( 'manage_woocommerce' ) ||
			     current_user_can( 'publish_shop_orders' )
			) {

				add_filter( 'woocommerce_dashboard_status_widget_sales_query', array(
					$this,
					'filter_dashboard_status_widget_sales_query'
				) );
				add_filter( 'woocommerce_dashboard_status_widget_top_seller_query', array(
					$this,
					'filter_dashboard_status_widget_sales_query'
				) );
			}

			add_action( 'current_screen', array( $this, 'admin_screen_loaded' ), 10, 1 );
		}
	}

	public function admin_screen_loaded( $screen ) {

		if ( $screen->id === 'dashboard' ) {
			add_filter( 'woocommerce_reports_get_order_report_query', array(
				$this,
				'filter_dashboard_status_widget_sales_query'
			) ); // woocommerce 2.6
		}

	}

	public function reports_init() {

		if ( isset( $_GET['page'] ) && $_GET['page'] == 'wc-reports' ) { //wc-reports - 2.1.x, woocommerce_reports 2.0.x

			add_filter( 'woocommerce_reports_get_order_report_query', array( $this, 'admin_reports_query_filter' ) );

			$wcml_reports_set_currency_nonce = wp_create_nonce( 'reports_set_currency' );

			wc_enqueue_js( "
                jQuery('#dropdown_shop_report_currency').on('change', function(){
                    jQuery('#dropdown_shop_report_currency_chosen').after('&nbsp;' + icl_ajxloaderimg);
                    jQuery('#dropdown_shop_report_currency_chosen a.chosen-single').css('color', '#aaa');
                    jQuery.ajax({
                        url: ajaxurl,
                        type: 'post',
                        data: {
                            action: 'wcml_reports_set_currency',
                            currency: jQuery('#dropdown_shop_report_currency').val(),
                            wcml_nonce: '" . $wcml_reports_set_currency_nonce . "'
                            },
                        success: function( response ){
                            if(typeof response.error !== 'undefined'){
                                alert(response.error);
                            }else{
                               window.location = window.location.href;
                            }
                        }
                    })
                });
            " );

			$this->reports_currency = isset( $_COOKIE['_wcml_reports_currency'] ) ? $_COOKIE['_wcml_reports_currency'] : get_option( 'woocommerce_currency' );
			//validation
			$orders_currencies = $this->woocommerce_wpml->multi_currency->orders->get_orders_currencies();
			if ( ! isset( $orders_currencies[ $this->reports_currency ] ) ) {
				$this->reports_currency = ! empty( $orders_currencies ) ? key( $orders_currencies ) : false;
			}

			add_filter( 'woocommerce_currency_symbol', array( $this, '_set_reports_currency_symbol' ) );


		}
	}

	public function admin_reports_query_filter( $query ) {

		$query['join']  .= " LEFT JOIN {$this->wpdb->postmeta} AS meta_order_currency ON meta_order_currency.post_id = posts.ID ";
		$query['where'] .= sprintf( " AND meta_order_currency.meta_key='_order_currency' AND meta_order_currency.meta_value = '%s' ",
			$this->reports_currency );

		return $query;
	}

	public function _set_reports_currency_symbol( $currency ) {
		static $no_recur = false;
		if ( ! empty( $this->reports_currency ) && empty( $no_recur ) ) {
			$no_recur = true;
			$currency = get_woocommerce_currency_symbol( $this->reports_currency );
			$no_recur = false;
		}

		return $currency;
	}

	public function set_reports_currency() {

		$nonce = filter_input( INPUT_POST, 'wcml_nonce', FILTER_SANITIZE_FULL_SPECIAL_CHARS );
		if ( ! $nonce || ! wp_verify_nonce( $nonce, 'reports_set_currency' ) ) {
			echo json_encode( array( 'error' => __( 'Invalid nonce', 'woocommerce-multilingual' ) ) );
			die();
		}

		$cookie_name = '_wcml_reports_currency';
		// @todo uncomment or delete when #wpmlcore-5796 is resolved
		//do_action( 'wpsc_add_cookie', $cookie_name );
		setcookie( $cookie_name, filter_input( INPUT_POST, 'currency', FILTER_SANITIZE_FULL_SPECIAL_CHARS ),
			time() + 86400, COOKIEPATH, COOKIE_DOMAIN );

		exit;

	}

	public function reports_currency_selector() {

		$orders_currencies = $this->woocommerce_wpml->multi_currency->orders->get_orders_currencies();
		$currencies        = get_woocommerce_currencies();

		// remove temporary
		remove_filter( 'woocommerce_currency_symbol', array( $this, '_set_reports_currency_symbol' ) );

		?>

        <select id="dropdown_shop_report_currency" style="margin-left:5px;">
			<?php if ( empty( $orders_currencies ) ): ?>
                <option value=""><?php _e( 'Currency - no orders found', 'woocommerce-multilingual' ) ?></option>
			<?php else: ?>
				<?php foreach ( $orders_currencies as $currency => $count ): ?>
                    <option value="<?php echo $currency ?>" <?php selected( $currency, $this->reports_currency ); ?>>
						<?php printf( "%s (%s)", $currencies[ $currency ], get_woocommerce_currency_symbol( $currency ) ) ?>
                    </option>
				<?php endforeach; ?>
			<?php endif; ?>
        </select>

		<?php
		// add back
		add_filter( 'woocommerce_currency_symbol', array( $this, '_set_reports_currency_symbol' ) );

	}

	/*
	* Filter WC dashboard status query
	*
	* @param string $query Query to filter
	*
	* @return string
	*/
	public function filter_dashboard_status_widget_sales_query( $query ) {
		$order_ids_list = $this->get_dashboard_currency_list_of_orders_ids();

		if( $order_ids_list ){
			$query['where'] .= " AND posts.ID IN (" . $order_ids_list . ") ";
        }

		return $query;
	}

	public function get_dashboard_currency_list_of_orders_ids() {

		$currency = $this->woocommerce_wpml->multi_currency->admin_currency_selector->get_cookie_dashboard_currency();

		$cache_key  = $currency . '_list_of_orders_ids';
		$found      = false;
		$orders_ids = $this->wpml_cache->get( $cache_key, $found );

		if ( ! $found ) {
			$order_ids_array = $this->wpdb->get_col(
				$this->wpdb->prepare( "
                        SELECT order_currency.post_id 
                        FROM {$this->wpdb->postmeta} AS order_currency
                        WHERE order_currency.meta_key = '_order_currency' 
                            AND order_currency.meta_value = %s
                    ", $currency
				)
			);
			$orders_ids      = wpml_prepare_in( $order_ids_array, '%d' );

			$this->wpml_cache->set( $cache_key, $orders_ids );
		}

		return $orders_ids;
	}

}