<?php
/**
 * Admin settings page.
 *
 * @package AfriDirect_Payment
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Admin settings class.
 */
class AfriDirect_Payment_Admin_Settings {

	/**
	 * Plugin instance.
	 *
	 * @var AfriDirect_Payment_Admin_Settings
	 */
	private static $instance = null;

	/**
	 * Get plugin instance.
	 *
	 * @return AfriDirect_Payment_Admin_Settings
	 */
	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( 'admin_menu', array( $this, 'add_admin_menu' ), 20 ); // Priority 20 to run after other submenus.
		add_action( 'admin_post_afridirect_save_settings', array( $this, 'handle_save' ) );
	}

	/**
	 * Add admin menu.
	 */
	public function add_admin_menu() {
		$menu_manager = AfriDirect_Payment_Admin_Menu::instance();

		add_submenu_page(
			$menu_manager->get_menu_slug(),
			__( 'Settings', 'afridirect-payment' ),
			__( 'Settings', 'afridirect-payment' ),
			$menu_manager->get_capability(),
			'afridirect-settings',
			array( $this, 'render_page' )
		);
	}

	/**
	 * The WooCommerce gateway instance, if WooCommerce is active.
	 *
	 * @return WC_Payment_Gateway|null
	 */
	private function get_gateway() {
		if ( ! class_exists( 'WooCommerce' ) || ! function_exists( 'WC' ) || ! WC()->payment_gateways() ) {
			return null;
		}

		$gateways = WC()->payment_gateways()->payment_gateways();
		return isset( $gateways['afridirect_payment'] ) ? $gateways['afridirect_payment'] : null;
	}

	/**
	 * Render the settings page.
	 */
	public function render_page() {
		$menu_manager = AfriDirect_Payment_Admin_Menu::instance();
		if ( ! current_user_can( $menu_manager->get_capability() ) ) {
			wp_die( esc_html__( 'You do not have sufficient permissions to access this page.', 'afridirect-payment' ) );
		}

		$gateway = $this->get_gateway();

		$gateway_values = array(
			'enabled'     => false,
			'title'       => '',
			'description' => '',
			'form_id'     => 0,
		);

		if ( $gateway ) {
			$gateway_values = array(
				'enabled'     => 'yes' === $gateway->get_option( 'enabled' ),
				'title'       => $gateway->get_option( 'title' ),
				'description' => $gateway->get_option( 'description' ),
				'form_id'     => (int) $gateway->get_option( 'default_form_id' ),
			);
		}

		$forms         = AfriDirect_Payment_Dashboard_Data::get_forms( 100 );
		$delete_data   = (bool) get_option( 'afridirect_delete_data_on_uninstall', false );
		$notify_admin  = (bool) get_option( 'afridirect_notify_admin', 1 );
		$notify_email  = (string) get_option( 'afridirect_notify_email', '' );
		$notify_started = (bool) get_option( 'afridirect_notify_started', 1 );
		$blocks_active = function_exists( 'afridirect_is_checkout_blocks_active' ) && afridirect_is_checkout_blocks_active();
		$switch_url    = wp_nonce_url( admin_url( 'admin-post.php?action=afridirect_switch_to_classic_checkout' ), 'afridirect_switch_to_classic_checkout' );

		// One-time "saved" confirmation after the redirect from handle_save(). Display only.
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended
		$saved = isset( $_GET['afd_saved'] ) && '1' === $_GET['afd_saved'];

		include AFRIDIRECT_PAYMENT_PLUGIN_DIR . 'admin/views/settings.php';
	}

	/**
	 * Save the settings form.
	 */
	public function handle_save() {
		$menu_manager = AfriDirect_Payment_Admin_Menu::instance();

		if ( ! current_user_can( $menu_manager->get_capability() ) ) {
			wp_die( esc_html__( 'You do not have permission to change these settings.', 'afridirect-payment' ), '', array( 'response' => 403 ) );
		}

		check_admin_referer( 'afridirect_save_settings', 'afridirect_settings_nonce' );

		$gateway = $this->get_gateway();

		if ( $gateway ) {
			$enabled     = isset( $_POST['afridirect_gateway_enabled'] ) ? 'yes' : 'no';
			$title       = isset( $_POST['afridirect_gateway_title'] ) ? sanitize_text_field( wp_unslash( $_POST['afridirect_gateway_title'] ) ) : '';
			$description = isset( $_POST['afridirect_gateway_description'] ) ? sanitize_textarea_field( wp_unslash( $_POST['afridirect_gateway_description'] ) ) : '';
			$form_id     = isset( $_POST['afridirect_gateway_form_id'] ) ? absint( wp_unslash( $_POST['afridirect_gateway_form_id'] ) ) : 0;

			// Only accept an existing payment form.
			if ( $form_id && 'afridirect_form' !== get_post_type( $form_id ) ) {
				$form_id = 0;
			}

			if ( '' === $title ) {
				$title = __( 'Pay directly', 'afridirect-payment' );
			}

			$gateway->update_option( 'enabled', $enabled );
			$gateway->update_option( 'title', $title );
			$gateway->update_option( 'description', $description );
			$gateway->update_option( 'default_form_id', $form_id ? (string) $form_id : '' );
		}

		update_option( 'afridirect_delete_data_on_uninstall', isset( $_POST['afridirect_delete_data'] ) ? 1 : 0 );
		update_option( 'afridirect_notify_admin', isset( $_POST['afridirect_notify_admin'] ) ? 1 : 0 );
		update_option( 'afridirect_notify_started', isset( $_POST['afridirect_notify_started'] ) ? 1 : 0 );

		$notify_email = isset( $_POST['afridirect_notify_email'] ) ? sanitize_email( wp_unslash( $_POST['afridirect_notify_email'] ) ) : '';
		update_option( 'afridirect_notify_email', is_email( $notify_email ) ? $notify_email : '' );

		wp_safe_redirect( add_query_arg( 'afd_saved', '1', AfriDirect_Payment_Admin_UI::page_url( 'afridirect-settings' ) ) );
		exit;
	}
}