<?php
/**
 * Labels builder.
 *
 * @package Woocommerce Dpd
 */

/**
 * Can build labels.
 */
class WPDesk_Flexible_Shipping_Dpd_Label_Builder extends WPDesk_Flexible_Shipping_Integration_Label_Builder {

	/**
	 * Get labels for shipments.
	 *
	 * @return array
	 *
	 * @throws Exception .
	 */
	public function get_labels_for_shipments() {
		$shipping_method = $this->get_shipping_method();
		if ( WPDesk_WooCommerce_DPD_Label_Settings::A4_MULTIPLE === $shipping_method->get_option( WPDesk_WooCommerce_DPD_Shipping_Method::OPTION_LABEL_PAGE_FORMAT, '' ) ) {
			return $this->get_labels_as_single_file_per_session_type();
		} else {
			return $this->get_labels_as_label_per_file();
		}
	}

	/**
	 * Get labels as label per file.
	 *
	 * @return array
	 *
	 * @throws Exception .
	 */
	private function get_labels_as_single_file_per_session_type() {
		$labels                 = array();
		$packages_domestic      = array();
		$packages_international = array();
		/** @var WPDesk_Flexible_Shipping_Shipment_dpd $shipment */ // phpcs:ignore
		foreach ( $this->shipments as $shipment ) {
			if ( $shipment->label_avaliable() ) {
				$package_id = $shipment->get_meta( WPDesk_Flexible_Shipping_Shipment_dpd::DPD_PACKAGE_ID );
				if ( $shipment->get_session_type() === $shipment::DOMESTIC ) {
					$packages_domestic[] = $package_id;
				} else {
					$packages_international[] = $package_id;
				}
			}
		}
		if ( count( $packages_domestic ) ) {
			$labels[] = $this->get_labels_from_api_for_parcels( WPDesk_Flexible_Shipping_Shipment_dpd::DOMESTIC, $packages_domestic );
		}
		if ( count( $packages_international ) ) {
			$labels[] = $this->get_labels_from_api_for_parcels( WPDesk_Flexible_Shipping_Shipment_dpd::INTERNATIONAL, $packages_international );
		}
		return $labels;
	}

	/**
	 * Get labels from api for parcels.
	 *
	 * @param string $session_type .
	 * @param array  $packages .
	 *
	 * @return array
	 *
	 * @throws Exception .
	 */
	private function get_labels_from_api_for_parcels( $session_type, $packages ) {
		$api = $this->get_shipping_method()->get_api();

		$label_response = $api->get_labels_in_single_file(
			$packages,
			$session_type,
			WPDesk_WooCommerce_DPD_Label_Settings::PDF,
			WPDesk_WooCommerce_DPD_Label_Settings::A4,
			WPDesk_WooCommerce_DPD_Label_Settings::BIC3
		);

		$label_format = strtolower( WPDesk_WooCommerce_DPD_Label_Settings::PDF );

		return array(
			'label_format' => $label_format,
			'content'      => $label_response->return->documentData,
			'file_name'    => 'dpd_labels_' . strtolower( $session_type ) . '.' . $label_format,
		);

	}

	/**
	 * Get labels as label per file.
	 *
	 * @return array
	 *
	 * @throws Exception .
	 */
	private function get_labels_as_label_per_file() {
		$labels = array();
		/** @var WPDesk_Flexible_Shipping_Shipment_dpd $shipment */ // phpcs:ignore
		foreach ( $this->shipments as $shipment ) {
			if ( $shipment->label_avaliable() ) {
				$labels[] = $shipment->get_label();
			}
		}
		return $labels;
	}

	/**
	 * Get shipping method.
	 *
	 * @return WPDesk_WooCommerce_DPD_Shipping_Method
	 */
	private function get_shipping_method() {
		$shipping_methods = WC()->shipping()->shipping_methods;
		if ( empty( $shipping_methods ) || ! is_array( $shipping_methods ) || count( $shipping_methods ) === 0 || ! isset( $shipping_methods[ WPDesk_WooCommerce_DPD_Shipping_Method::SHIPPING_METHOD_ID ] ) ) {
			$shipping_methods = WC()->shipping()->load_shipping_methods();
		}

		return $shipping_methods[ WPDesk_WooCommerce_DPD_Shipping_Method::SHIPPING_METHOD_ID ];
	}

}