<?php
/**
 * Main plugin class.
 *
 * @package AfriDirect_Payment
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Main plugin class.
 */
class AfriDirect_Payment_Main {

	/**
	 * Plugin instance.
	 *
	 * @var AfriDirect_Payment_Main
	 */
	private static $instance = null;

	/**
	 * Get plugin instance.
	 *
	 * @return AfriDirect_Payment_Main
	 */
	public static function instance() {
		if ( is_null( self::$instance ) ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	/**
	 * Constructor.
	 */
	private function __construct() {
		$this->init_hooks();
	}

	/**
	 * Initialize hooks.
	 */
	private function init_hooks() {
		add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_frontend_scripts' ) );
		add_filter( 'body_class', array( $this, 'add_page_body_class' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_admin_scripts' ) );
		add_filter( 'plugin_action_links_' . AFRIDIRECT_PAYMENT_PLUGIN_BASENAME, array( $this, 'add_plugin_action_links' ) );
	}

	/**
	 * Mark the plugin's own pages (payment request, pending and receipt) so their titles can be centred over the cards.
	 *
	 * @param string[] $classes Body classes.
	 * @return string[]
	 */
	public function add_page_body_class( $classes ) {
		if ( ! is_page() ) {
			return $classes;
		}

		$own_pages = array_filter(
			array(
				(int) get_option( 'afridirect_request_page_id', 0 ),
				(int) get_option( 'afridirect_pending_page_id', 0 ),
				(int) get_option( 'afridirect_receipt_page_id', 0 ),
			)
		);

		if ( in_array( get_queried_object_id(), $own_pages, true ) ) {
			$classes[] = 'afridirect-own-page';
		}

		return $classes;
	}

	/**
	 * Enqueue frontend scripts and styles.
	 */
	public function enqueue_frontend_scripts() {
		// Cache-bust assets to avoid stale JS/CSS in browsers/CDNs.
		$css_ver = afridirect_payment_asset_ver( 'public/css/frontend.css' );
		$js_ver  = afridirect_payment_asset_ver( 'public/js/frontend.js' );

		// Register unconditionally so shortcodes can enqueue on demand, then
		// auto-enqueue on the pages we can detect up front.
		wp_register_style(
			'afridirect-frontend',
			AFRIDIRECT_PAYMENT_PLUGIN_URL . 'public/css/frontend.css',
			array(),
			$css_ver
		);

		wp_register_script(
			'afridirect-frontend',
			AFRIDIRECT_PAYMENT_PLUGIN_URL . 'public/js/frontend.js',
			array( 'jquery' ),
			$js_ver,
			true
		);

		wp_localize_script(
			'afridirect-frontend',
			'afridirectPayment',
			array(
				'ajaxUrl' => admin_url( 'admin-ajax.php' ),
				'nonce'   => wp_create_nonce( 'afridirect-payment-nonce' ),
				'i18n'    => array(
					'copied'              => __( 'Copied!', 'afridirect-payment' ),
					'copy'                => __( 'Copy', 'afridirect-payment' ),
					'selectFile'          => __( 'Please select a file to upload.', 'afridirect-payment' ),
					'uploading'           => __( 'Uploading...', 'afridirect-payment' ),
					'uploadComplete'      => __( 'Upload complete!', 'afridirect-payment' ),
					'errorOccurred'       => __( 'An error occurred during upload. Please try again.', 'afridirect-payment' ),
					'timeExpired'         => __( 'Time expired!', 'afridirect-payment' ),
					'proofReceived'       => __( 'Proof received — under review', 'afridirect-payment' ),
				),
			)
		);

		// Auto-enqueue where we can detect the context; shortcodes enqueue the rest.
		$post              = get_post();
		$content           = $post instanceof WP_Post ? $post->post_content : '';
		$has_shortcode     = has_shortcode( $content, 'afridirect_form' )
			|| has_shortcode( $content, 'afridirect_payment_pending' )
			|| has_shortcode( $content, 'afridirect_payment_receipt' )
			|| has_shortcode( $content, 'afridirect_payment_request' );
		$is_order_received = class_exists( 'WooCommerce' ) && is_wc_endpoint_url( 'order-received' );
		$is_account_page   = class_exists( 'WooCommerce' ) && is_account_page();
		$is_view_order     = class_exists( 'WooCommerce' ) && is_wc_endpoint_url( 'view-order' );

		if ( $has_shortcode || $is_order_received || $is_account_page || $is_view_order ) {
			wp_enqueue_style( 'afridirect-frontend' );
			wp_enqueue_script( 'afridirect-frontend' );
		}
	}

	/**
	 * Enqueue admin scripts and styles.
	 */
	public function enqueue_admin_scripts( $hook ) {
		$screen = get_current_screen();
		
		// Enqueue for standalone payment edit screen.
		if ( $screen && 'afridirect_payment' === $screen->post_type && 'post' === $screen->base ) {
			wp_enqueue_style(
				'afridirect-payment-admin',
				AFRIDIRECT_PAYMENT_PLUGIN_URL . 'admin/css/admin.css',
				array(),
				afridirect_payment_asset_ver( 'admin/css/admin.css' )
			);

			wp_enqueue_script(
				'afridirect-admin-payments',
				AFRIDIRECT_PAYMENT_PLUGIN_URL . 'admin/js/payments.js',
				array( 'jquery' ),
				afridirect_payment_asset_ver( 'admin/js/payments.js' ),
				true
			);

			wp_localize_script(
				'afridirect-admin-payments',
				'afridirectPaymentAdmin',
				array(
					'ajaxUrl' => admin_url( 'admin-ajax.php' ),
					'nonce'   => wp_create_nonce( 'afridirect_payment_actions' ),
					'i18n'    => array(
						'confirmApprove' => __( 'Are you sure you want to approve this payment?', 'afridirect-payment' ),
						'confirmReject'  => __( 'Are you sure you want to reject this payment?', 'afridirect-payment' ),
						'provideReason'  => __( 'Please provide a rejection reason.', 'afridirect-payment' ),
					),
				)
			);
		}
	}

	/**
	 * Add plugin action links.
	 *
	 * @param array $links Existing links.
	 * @return array
	 */
	public function add_plugin_action_links( $links ) {
		// The plugin has its own Settings page, which works with or without WooCommerce.
		$settings_url  = admin_url( 'admin.php?page=afridirect-settings' );
		$settings_link = '<a href="' . esc_url( $settings_url ) . '">' . esc_html__( 'Settings', 'afridirect-payment' ) . '</a>';
		array_unshift( $links, $settings_link );
		return $links;
	}
}

/**
 * Check if WooCommerce checkout blocks are active.
 *
 * Returns true if WooCommerce is active AND the currently assigned checkout page uses blocks.
 * Defensive: returns false if checkout page is missing or WooCommerce is not active.
 *
 * @return bool
 */
function afridirect_is_checkout_blocks_active() {
	// Must have WooCommerce active.
	if ( ! class_exists( 'WooCommerce' ) ) {
		return false;
	}

	// Get checkout page ID.
	$checkout_page_id = get_option( 'woocommerce_checkout_page_id', 0 );
	if ( ! $checkout_page_id ) {
		return false;
	}

	// Load the post content.
	$checkout_page = get_post( $checkout_page_id );
	if ( ! $checkout_page || 'page' !== $checkout_page->post_type ) {
		return false;
	}

	$content = $checkout_page->post_content;

	// Check for checkout blocks.
	// Check for both 'woocommerce/checkout' and 'woocommerce/checkout-block' block names.
	if ( function_exists( 'has_block' ) ) {
		if ( has_block( 'woocommerce/checkout', $content ) || has_block( 'woocommerce/checkout-block', $content ) ) {
			return true;
		}
	}

	// Also check for block patterns (Gutenberg block syntax).
	if ( false !== strpos( $content, '<!-- wp:woocommerce/checkout' ) || false !== strpos( $content, '<!-- wp:woocommerce/checkout-block' ) ) {
		return true;
	}

	return false;
}

/**
 * Null logger used when WooCommerce (and its logger) is not available.
 *
 * Accepts any PSR-3 style call (error, info, debug...) and discards it.
 */
class AfriDirect_Payment_Null_Logger {

	/**
	 * Swallow any logging call.
	 *
	 * @param string $name      Method name.
	 * @param array  $arguments Arguments.
	 * @return void
	 */
	public function __call( $name, $arguments ) {
		unset( $name, $arguments );
	}
}

/**
 * Get a logger that is safe to call whether or not WooCommerce is active.
 *
 * @return object WC_Logger when available, otherwise a logger that does nothing.
 */
function afridirect_get_logger() {
	if ( function_exists( 'wc_get_logger' ) ) {
		return wc_get_logger();
	}

	return new AfriDirect_Payment_Null_Logger();
}