<?php
/**
 * Handles wcpay promotion
 */

namespace Automattic\WooCommerce\Admin\Features\WcPayPromotion;

defined( 'ABSPATH' ) || exit;

use Automattic\WooCommerce\Admin\DataSourcePoller;
use Automattic\WooCommerce\Admin\Loader;
use Automattic\WooCommerce\Admin\Features\PaymentGatewaySuggestions\EvaluateSuggestion;
use Automattic\WooCommerce\Admin\PaymentMethodSuggestionsDataSourcePoller;

/**
 * WC Pay Promotion engine.
 */
class Init {
	const EXPLAT_VARIATION_PREFIX = 'woocommerce_wc_pay_promotion_payment_methods_table_';

	/**
	 * Constructor.
	 */
	public function __construct() {
		include_once __DIR__ . '/WCPaymentGatewayPreInstallWCPayPromotion.php';

		add_action( 'change_locale', array( __CLASS__, 'delete_specs_transient' ) );
		add_filter( DataSourcePoller::FILTER_NAME_SPECS, array( __CLASS__, 'possibly_filter_recommended_payment_gateways' ), 10, 2 );

		$is_payments_page = isset( $_GET['page'] ) && 'wc-settings' === $_GET['page'] && isset( $_GET['tab'] ) && 'checkout' === $_GET['tab']; // phpcs:ignore WordPress.Security.NonceVerification
		if ( ! wp_is_json_request() && ! $is_payments_page ) {
			return;
		}

		add_filter( 'woocommerce_payment_gateways', array( __CLASS__, 'possibly_register_pre_install_wc_pay_promotion_gateway' ) );
		add_filter( 'option_woocommerce_gateway_order', [ __CLASS__, 'set_gateway_top_of_list' ] );
		add_filter( 'default_option_woocommerce_gateway_order', [ __CLASS__, 'set_gateway_top_of_list' ] );

		$rtl = is_rtl() ? '.rtl' : '';

		wp_enqueue_style(
			'wc-admin-payment-method-promotions',
			Loader::get_url( "payment-method-promotions/style{$rtl}", 'css' ),
			array( 'wp-components' ),
			Loader::get_file_version( 'css' )
		);

		$script_assets_filename = Loader::get_script_asset_filename( 'wp-admin-scripts', 'payment-method-promotions' );
		$script_assets          = require WC_ADMIN_ABSPATH . WC_ADMIN_DIST_JS_FOLDER . 'wp-admin-scripts/' . $script_assets_filename;

		wp_enqueue_script(
			'wc-admin-payment-method-promotions',
			Loader::get_url( 'wp-admin-scripts/payment-method-promotions', 'js' ),
			array_merge( array( WC_ADMIN_APP ), $script_assets ['dependencies'] ),
			Loader::get_file_version( 'js' ),
			true
		);
	}

	/**
	 * Possibly registers the pre install wc pay promoted gateway.
	 *
	 * @param array $gateways list of gateway classes.
	 * @return array list of gateway classes.
	 */
	public static function possibly_register_pre_install_wc_pay_promotion_gateway( $gateways ) {
		if ( self::can_show_promotion() && ! WCPaymentGatewayPreInstallWCPayPromotion::is_dismissed() ) {
			$gateways[] = 'Automattic\WooCommerce\Admin\Features\WCPayPromotion\WCPaymentGatewayPreInstallWCPayPromotion';
		}
		return $gateways;
	}

	/**
	 * Possibly filters out woocommerce-payments from recommended payment methods.
	 *
	 * @param array  $specs list of payment methods.
	 * @param string $datasource_poller_id id of data source poller.
	 * @return array list of payment method.
	 */
	public static function possibly_filter_recommended_payment_gateways( $specs, $datasource_poller_id ) {
		if ( PaymentMethodSuggestionsDataSourcePoller::ID === $datasource_poller_id && self::can_show_promotion() ) {
			return array_filter(
				$specs,
				function( $spec ) {
					return 'woocommerce-payments' !== $spec->plugins[0];
				}
			);
		}
		return $specs;
	}

	/**
	 * Checks if promoted gateway can be registered.
	 *
	 * @return boolean if promoted gateway should be registered.
	 */
	public static function can_show_promotion() {
		// Check if WC Pay is enabled.
		if ( class_exists( '\WC_Payments' ) ) {
			return false;
		}
		if ( 'no' === get_option( 'woocommerce_show_marketplace_suggestions', 'yes' ) ) {
			return false;
		}
		if ( ! apply_filters( 'woocommerce_allow_marketplace_suggestions', true ) ) {
			return false;
		}

		$wc_pay_spec = self::get_wc_pay_promotion_spec();
		if ( ! $wc_pay_spec ) {
			return false;
		}
		return true;
	}

	/**
	 * By default, new payment gateways are put at the bottom of the list on the admin "Payments" settings screen.
	 * For visibility, we want WooCommerce Payments to be at the top of the list.
	 *
	 * @param array $ordering Existing ordering of the payment gateways.
	 *
	 * @return array Modified ordering.
	 */
	public static function set_gateway_top_of_list( $ordering ) {
		$ordering = (array) $ordering;
		$id       = WCPaymentGatewayPreInstallWCPayPromotion::GATEWAY_ID;
		// Only tweak the ordering if the list hasn't been reordered with WooCommerce Payments in it already.
		if ( ! isset( $ordering[ $id ] ) || ! is_numeric( $ordering[ $id ] ) ) {
			$is_empty        = empty( $ordering ) || ( 1 === count( $ordering ) && false === $ordering[0] );
			$ordering[ $id ] = $is_empty ? 0 : ( min( $ordering ) - 1 );
		}
		return $ordering;
	}

	/**
	 * Get WC Pay promotion spec.
	 */
	public static function get_wc_pay_promotion_spec() {
		$promotions            = self::get_promotions();
		$wc_pay_promotion_spec = array_values(
			array_filter(
				$promotions,
				function( $promotion ) {
					return isset( $promotion->plugins ) && in_array( 'woocommerce-payments', $promotion->plugins, true );
				}
			)
		);

		return current( $wc_pay_promotion_spec );
	}

	/**
	 * Go through the specs and run them.
	 */
	public static function get_promotions() {
		$suggestions = array();
		$specs       = self::get_specs();

		foreach ( $specs as $spec ) {
			$suggestion    = EvaluateSuggestion::evaluate( $spec );
			$suggestions[] = $suggestion;
		}

		return array_values(
			array_filter(
				$suggestions,
				function( $suggestion ) {
					return ! property_exists( $suggestion, 'is_visible' ) || $suggestion->is_visible;
				}
			)
		);

	}

	/**
	 * Delete the specs transient.
	 */
	public static function delete_specs_transient() {
		WcPayPromotionDataSourcePoller::get_instance()->delete_specs_transient();
	}

	/**
	 * Get specs or fetch remotely if they don't exist.
	 */
	public static function get_specs() {
		if ( 'no' === get_option( 'woocommerce_show_marketplace_suggestions', 'yes' ) ) {
			return array();
		}
		return WcPayPromotionDataSourcePoller::get_instance()->get_specs_from_data_sources();
	}
}