<?php
/**
 * The three short mentions of CN WebStyle's paid plugins, each shown in one place where it fits.
 *
 * Every mention can be dismissed for good per user, and none is shown when that plugin is already
 * active. There are no admin notices or banners anywhere else.
 *
 * @package CNWS\Coupons
 */

namespace CNWS\Coupons\Admin;

defined( 'ABSPATH' ) || exit;

final class Promotions {

	public const META = 'cnwscoupons_dismissed_promotions';

	/**
	 * Key => constant that tells the plugin is active, and default link.
	 */
	private const PRODUCTS = array(
		'shipping'   => array( 'CNWSCHECKOUT_PRO_VERSION', 'https://web-style.dk/vare/checkout-optimizer-pro/' ),
		'newsletter' => array( 'CNWS_MAIL_VERSION', 'https://web-style.dk/woocommerce-nyhedsbrev/' ),
		'accounting' => array( 'CNWS_ACCOUNTING_VERSION', 'https://web-style.dk/woocommerce-regnskabsintegration/' ),
	);

	/**
	 * Promotions to show the current user, all in the guide's discount step where they explain a next
	 * step: 'accounting' under the discount (bookkeeping), 'shipping' under how shipping is calculated
	 * and 'newsletter' under sending personal codes.
	 *
	 * @return array<string, array{title: string, text: string, label: string, link: string}>
	 */
	public function visible(): array {
		$dismissed = $this->dismissed();
		$visible   = array();

		foreach ( self::PRODUCTS as $key => list( $constant, $link ) ) {
			// The shipping text explains why the code cannot change shipping, so it stays while Checkout
			// Optimizer Pro is active but does not handle the code (an older version or no free_shipping
			// entitlement); a Pro that handles it replaces the whole text with its own settings.
			if ( in_array( $key, $dismissed, true ) || ( defined( $constant ) && 'shipping' !== $key ) ) {
				continue;
			}

			$visible[ $key ] = $this->copy( $key ) + array(
				/**
				 * Link of a promotion, e.g. to a reseller's page.
				 *
				 * @param string $link Default link on web-style.dk.
				 * @param string $key  shipping, newsletter or accounting.
				 */
				'link' => esc_url_raw( (string) apply_filters( 'cnwscoupons_promotion_link', $link, $key ) ),
			);
		}

		return $visible;
	}

	/**
	 * @param string $key Promotion key.
	 */
	public function dismiss( string $key ): void {
		if ( ! isset( self::PRODUCTS[ $key ] ) ) {
			return;
		}

		$dismissed = $this->dismissed();

		if ( ! in_array( $key, $dismissed, true ) ) {
			$dismissed[] = $key;
			update_user_meta( get_current_user_id(), self::META, $dismissed );
		}
	}

	/**
	 * @return string[]
	 */
	private function dismissed(): array {
		$dismissed = get_user_meta( get_current_user_id(), self::META, true );

		return is_array( $dismissed ) ? array_values( array_filter( $dismissed, 'is_string' ) ) : array();
	}

	/**
	 * A pitch: the question the shop has at that point, one line on the answer and a button.
	 *
	 * @param string $key Promotion key.
	 * @return array{title: string, text: string, label: string}
	 */
	private function copy( string $key ): array {
		switch ( $key ) {
			case 'shipping':
				return array(
					'title' => __( 'Want to control shipping with the code?', 'webstyle-coupons' ),
					'text'  => defined( 'CNWSCHECKOUT_PRO_VERSION' )
						? __( 'Your Checkout Optimizer Pro does not control shipping for discount codes yet. Update it to the latest version and make sure your license includes free shipping.', 'webstyle-coupons' )
						: __( 'Want these options? Use our checkout plugin Checkout Optimizer Pro – it controls shipping, also for discount codes.', 'webstyle-coupons' ),
					'label' => __( 'See Checkout Optimizer Pro', 'webstyle-coupons' ),
				);
			case 'newsletter':
				return array(
					'title' => __( 'Send the codes as a newsletter?', 'webstyle-coupons' ),
					'text'  => __( 'WebStyle Mail puts each recipient\'s own code in the e-mail – no CSV files, no copying.', 'webstyle-coupons' ),
					'label' => __( 'See WebStyle Mail', 'webstyle-coupons' ),
				);
			default:
				return array(
					'title' => __( 'Discounts straight into your bookkeeping?', 'webstyle-coupons' ),
					'text'  => __( 'WebStyle Accounting Sync posts orders and discounts to e-conomic, Dinero, Billy and more.', 'webstyle-coupons' ),
					'label' => __( 'See Accounting Sync', 'webstyle-coupons' ),
				);
		}
	}
}