<?php

if ( ! class_exists( 'WC_Connect_Shipping_Label' ) ) {

	class WC_Connect_Shipping_Label {

		/**
		 * @var WC_Connect_API_Client
		 */
		protected $api_client;

		/**
		 * @var WC_Connect_Service_Settings_Store
		 */
		protected $settings_store;

		/**
		 * @var WC_Connect_Service_Schemas_Store
		 */
		protected $service_schemas_store;

		/**
		 * @var WC_Connect_Payment_Methods_Store
		 */
		protected $payment_methods_store;

		/**
		 * @var array Supported countries
		 */
		private $supported_countries = array( 'US', 'PR' );

		/**
		 * @var array Supported currencies
		 */
		private $supported_currencies = array( 'USD' );

		/**
		 * @var array Unsupported states, by country
		 */
		private $unsupported_states = array(
			'US' => array( 'AA', 'AE', 'AP' ),
		);

		private $show_metabox = null;

		public function __construct(
			WC_Connect_API_Client $api_client,
			WC_Connect_Service_Settings_Store $settings_store,
			WC_Connect_Service_Schemas_Store $service_schemas_store
		) {
			$this->api_client = $api_client;
			$this->settings_store = $settings_store;
			$this->service_schemas_store = $service_schemas_store;
		}

		public function get_item_data( WC_Order $order, $item ) {
			$product = WC_Connect_Compatibility::instance()->get_item_product( $order, $item );
			if ( ! $product || ! $product->needs_shipping() ) {
				return null;
			}
			$height = 0;
			$length = 0;
			$weight = $product->get_weight();
			$width = 0;

			if ( $product->has_dimensions() ) {
				$height = $product->get_height();
				$length = $product->get_length();
				$width  = $product->get_width();
			}

			$product_data = array(
				'height'     => (float) $height,
				'product_id' => $item['product_id'],
				'length'     => (float) $length,
				'quantity'   => 1,
				'weight'     => (float) $weight,
				'width'      => (float) $width,
				'name'       => $this->get_name( $product ),
				'url'        => get_edit_post_link( WC_Connect_Compatibility::instance()->get_parent_product_id( $product ), null ),
			);

			if ( $product->is_type( 'variation' ) ) {
				$product_data['attributes'] = WC_Connect_Compatibility::instance()->get_formatted_variation( $product, true );
			}

			return $product_data;
		}

		public function get_items_as_individual_packages( WC_Order $order ) {
			$packages   = array();
			$item_count = 0;

			foreach ( $order->get_items() as $item ) {
				$item_data = $this->get_item_data( $order, $item );
				if ( null === $item_data ) {
					continue;
				}

				for ( $i = 0; $i < $item['qty']; $i++ ) {
					$id = 'weight_' . $item_count++ . '_individual';
					$packages[ $id ] = array(
						'id'     => $id,
						'box_id' => 'individual',
						'height' => $item_data['height'],
						'length' => $item_data['length'],
						'weight' => $item_data['weight'],
						'width'  => $item_data['width'],
						'items'  => array( $item_data ),
					);
				}
			}

			return $packages;
		}

		protected function get_packaging_from_shipping_method( $shipping_method ) {
			if ( ! $shipping_method || ! isset( $shipping_method['wc_connect_packages'] ) ) {
				return array();
			}

			$packages_data = $shipping_method['wc_connect_packages'];
			if ( ! $packages_data ) {
				return array();
			}

			// WC3 retrieves metadata as non-scalar values
			if ( is_array( $packages_data ) ) {
				return $packages_data;
			}

			// WC2.6 stores non-scalar values as string, but doesn't deserialize it on retrieval
			$packages = maybe_unserialize( $packages_data );
			if ( is_array( $packages ) ) {
				return $packages;
			}

			// legacy WCS stored the labels as JSON
			$packages = json_decode( $packages_data, true );
			if ( $packages ) {
				return $packages;
			}

			$packages_data = $this->settings_store->try_recover_invalid_json_string( 'box_id', $packages_data );
			$packages = json_decode( $packages_data, true );
			if ( $packages ) {
				return $packages;
			}

			return array();
		}

		protected function get_packaging_metadata( WC_Order $order ) {
			$shipping_methods = $order->get_shipping_methods();
			$shipping_method  = reset( $shipping_methods );
			$packaging        = $this->get_packaging_from_shipping_method( $shipping_method );

			if ( is_array( $packaging ) ) {
				return array_filter( $packaging );
			}

			return array();
		}

		protected function get_name( WC_Product $product ) {
			if ( $product->get_sku() ) {
				$identifier = $product->get_sku();
			} else {
				$identifier = '#' . WC_Connect_Compatibility::instance()->get_product_id( $product );

			}
			return sprintf( '%s - %s', $identifier, $product->get_title() );
		}

		public function get_selected_packages( WC_Order $order ) {
			$packages = $this->get_packaging_metadata( $order );
			if ( ! $packages ) {
				$items = $this->get_all_items( $order );
				$weight = array_sum( wp_list_pluck( $items, 'weight' ) );

				return array(
					'default_box' => array(
						'id'     => 'default_box',
						'box_id' => 'not_selected',
						'height' => 0,
						'length' => 0,
						'weight' => $weight,
						'width'  => 0,
						'items'  => $items,
					),
				);
			}

			$formatted_packages = array();

			foreach ( $packages as $package_obj ) {
				$package = ( array ) $package_obj;
				$package_id = $package['id'];
				$formatted_packages[ $package_id ] = $package;

				foreach ( $package['items'] as $item_index => $item ) {
					$product_data = ( array ) $item;
					$product = WC_Connect_Compatibility::instance()->get_item_product( $order, $product_data );

					if ( $product ) {
						$product_data['name'] = $this->get_name( $product );
						$product_data['url'] = get_edit_post_link( WC_Connect_Compatibility::instance()->get_parent_product_id( $product ), null );
						if ( $product->is_type( 'variation' ) ) {
							$formatted = WC_Connect_Compatibility::instance()->get_formatted_variation( $product, true );
							$product_data['attributes'] = $formatted;
						}
					} else {
						$product_data['name'] = WC_Connect_Compatibility::instance()->get_product_name_from_order( $product_data['product_id'], $order );
					}

					$formatted_packages[ $package_id ]['items'][ $item_index ] = $product_data;
				}
			}

			return $formatted_packages;
		}

		public function get_all_items( WC_Order $order ) {
			if ( $this->get_packaging_metadata( $order ) ) {
				return array();
			}

			$items = array();
			foreach ( $order->get_items() as $item ) {
				$item_data = $this->get_item_data( $order, $item );
				if ( null === $item_data ) {
					continue;
				}

				for ( $i = 0; $i < $item['qty']; $i++ ) {
					$items[] = $item_data;
				}
			}

			return $items;
		}

		public function get_selected_rates( WC_Order $order ) {
			$shipping_methods = $order->get_shipping_methods();
			$shipping_method = reset( $shipping_methods );
			$packages = $this->get_packaging_from_shipping_method( $shipping_method );
			$rates = array();

			foreach ( $packages as $idx => $package_obj ) {
				$package = ( array ) $package_obj;
				// Abort if the package data is malformed
				if ( ! isset( $package['id'] ) || ! isset( $package['service_id'] ) ) {
					return array();
				}

				$rates[ $package['id'] ] = $package['service_id'];
			}

			return $rates;
		}

		protected function format_address_for_api( $address ) {
			// Combine first and last name
			if ( ! isset( $address['name'] ) ) {
				$first_name = isset( $address['first_name'] ) ? trim( $address['first_name'] ) : '';
				$last_name  = isset( $address['last_name'] ) ? trim( $address['last_name'] ) : '';

				$address['name'] = $first_name . ' ' . $last_name;
			}

			// Rename address_1 to address
			if ( ! isset( $address['address'] ) && isset( $address['address_1'] ) ) {
				$address['address'] = $address['address_1'];
			}

			// Remove now defunct keys
			unset( $address['first_name'], $address['last_name'], $address['address_1'] );

			return $address;
		}

		protected function get_origin_address() {
			$origin = $this->format_address_for_api( $this->settings_store->get_origin_address() );

			return $origin;
		}

		protected function get_destination_address( WC_Order $order ) {
			$order_address = $order->get_address( 'shipping' );
			$destination   = $this->format_address_for_api( $order_address );

			return $destination;
		}

		protected function get_form_data( WC_Order $order ) {
			$order_id               = WC_Connect_Compatibility::instance()->get_order_id( $order );
			$selected_packages      = $this->get_selected_packages( $order );
			$is_packed              = ( false !== $this->get_packaging_metadata( $order ) );
			$origin                 = $this->get_origin_address();
			$selected_rates         = $this->get_selected_rates( $order );
			$destination            = $this->get_destination_address( $order );

			if ( ! $destination['country'] ) {
				$destination['country'] = $origin['country'];
			}

			$origin_normalized = ( bool ) WC_Connect_Options::get_option( 'origin_address', false );
			$destination_normalized = ( bool ) get_post_meta( $order_id, '_wc_connect_destination_normalized', true );

			$form_data = compact( 'is_packed', 'selected_packages', 'origin', 'destination', 'origin_normalized', 'destination_normalized' );

			$form_data['rates'] = array(
				'selected'  => (object) $selected_rates,
			);

			$form_data['order_id'] = $order_id;

			return $form_data;
		}

		private function is_supported_state( $country_code, $state_code ) {
			if ( ! $country_code || ! $state_code ) {
				return true;
			}

			if ( ! array_key_exists( $country_code, $this->unsupported_states ) ) {
				return true;
			}

			return ! in_array( $state_code, $this->unsupported_states[ $country_code ] );
		}

		private function is_supported_country( $country_code ) {
			return in_array( $country_code, $this->supported_countries );
		}

		private function is_supported_currency( $currency_code ) {
			return in_array( $currency_code, $this->supported_currencies );
		}

		private function is_supported_address( $address ) {
			$country_code = $address['country'];
			if ( ! $country_code ) {
				return true;
			}

			if ( ! $this->is_supported_country( $country_code ) ) {
				return false;
			}

			$state_code = $address['state'];
			return $this->is_supported_state( $country_code, $state_code );
		}

		protected function get_states_map() {
			$result = array();
			$all_countries = WC()->countries->get_countries();

			foreach ( $this->supported_countries as $country_code ) {
				$country_data = array( 'name' => html_entity_decode( $all_countries[ $country_code ] ) );
				$states = WC()->countries->get_states( $country_code );

				if ( $states ) {
					$country_data['states'] = array();
					foreach ( $states as $state_code => $name ) {
						if ( ! $this->is_supported_state( $country_code, $state_code ) ) {
						  continue;
						}
						$country_data['states'][ $state_code ] = html_entity_decode( $name );
					}
				}

				$result[ $country_code ] = $country_data;
			}

			return $result;
		}

		public function should_show_meta_box() {
			if ( null === $this->show_metabox ) {
				$this->show_metabox = $this->calculate_should_show_meta_box();
			}

			return $this->show_metabox;
		}

		private function calculate_should_show_meta_box() {
			$order = wc_get_order();

			if ( ! $order ) {
				return false;
			}

			// If the order already has purchased labels, show the meta-box no matter what
			if ( get_post_meta( WC_Connect_Compatibility::instance()->get_order_id( $order ), 'wc_connect_labels', true ) ) {
				return true;
			}

			// Restrict showing the metabox to supported store currencies.
			$base_currency = get_woocommerce_currency();
			if ( ! $this->is_supported_currency( $base_currency ) ) {
				return false;
			}

			// Restrict showing the meta-box to supported origin and destinations: US domestic, for now
			$base_location = wc_get_base_location();
			if ( ! $this->is_supported_country( $base_location['country'] ) ) {
				return false;
			}

			$dest_address = $order->get_address( 'shipping' );
			if ( ! $this->is_supported_address( $dest_address ) ) {
				return false;
			}

			// If the order was created using WCS checkout rates, show the meta-box regardless of the products' state
			if ( $this->get_packaging_metadata( $order ) ) {
				return true;
			}

			// At this point (no packaging data), only show if there's at least one existing and shippable product
			foreach ( $order->get_items() as $item ) {
				$product = WC_Connect_Compatibility::instance()->get_item_product( $order, $item );
				if ( $product && $product->needs_shipping() ) {
					return true;
				}
			}

			return false;
		}

		public function get_label_payload( $post_order_or_id ) {
			$order = wc_get_order( $post_order_or_id );
			if ( ! $order ) {
				return false;
			}

			$account_settings = $this->settings_store->get_account_settings();

			$order_id = WC_Connect_Compatibility::instance()->get_order_id( $order );
			$payload = array(
				'orderId'            => $order_id,
				'paperSize'          => $this->settings_store->get_preferred_paper_size(),
				'formData'           => $this->get_form_data( $order ),
				'labelsData'         => $this->settings_store->get_label_order_meta_data( $order_id ),
				//for backwards compatibility, still disable the country dropdown for calypso users with older plugin versions
				'canChangeCountries' => true,
			);

			$store_options = $this->settings_store->get_store_options();
			$store_options['countriesData'] = $this->get_states_map();
			$payload['storeOptions'] = $store_options;

			return $payload;
		}

		public function meta_box( $post ) {
			$order = wc_get_order( $post );
			$order_id = WC_Connect_Compatibility::instance()->get_order_id( $order );
			$payload = array(
				'orderId' => $order_id,
			);

			do_action( 'enqueue_wc_connect_script', 'wc-connect-create-shipping-label', $payload );
		}

	}
}