<?php
/**
 * Shared admin UI shell: branded header, navigation, assets and icons.
 *
 * Everything here is limited to the plugin's own admin screens.
 *
 * @package AfriDirect_Payment
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Admin UI class.
 */
class AfriDirect_Payment_Admin_UI {

	/**
	 * Plugin instance.
	 *
	 * @var AfriDirect_Payment_Admin_UI
	 */
	private static $instance = null;

	/**
	 * Get plugin instance.
	 *
	 * @return AfriDirect_Payment_Admin_UI
	 */
	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_enqueue_scripts', array( $this, 'enqueue_assets' ) );
		add_action( 'in_admin_header', array( $this, 'render_header' ) );
		add_filter( 'admin_body_class', array( $this, 'body_class' ) );
	}

	/**
	 * Slugs of the plugin's own admin pages.
	 *
	 * @return string[]
	 */
	public static function page_slugs() {
		return array(
			'afridirect-payment',
			'afridirect-payment-methods',
			'afridirect-payment-requests',
			'afridirect-standalone-payments',
			'afridirect-woo-payments',
			'afridirect-settings',
		);
	}

	/**
	 * Admin URL for one of the plugin pages.
	 *
	 * @param string $slug Page slug.
	 * @return string
	 */
	public static function page_url( $slug ) {
		return admin_url( 'admin.php?page=' . $slug );
	}

	/**
	 * The "page" query argument, sanitised. Read-only; used to recognise our screens.
	 *
	 * @return string
	 */
	private function current_page() {
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Read-only screen detection, nothing is processed.
		return isset( $_GET['page'] ) ? sanitize_key( wp_unslash( $_GET['page'] ) ) : '';
	}

	/**
	 * Post type of the current admin screen, if any.
	 *
	 * @return string
	 */
	private function current_post_type() {
		$screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null;
		return ( $screen && ! empty( $screen->post_type ) ) ? $screen->post_type : '';
	}

	/**
	 * Whether the current screen belongs to this plugin.
	 *
	 * @return bool
	 */
	public function is_plugin_screen() {
		if ( in_array( $this->current_page(), self::page_slugs(), true ) ) {
			return true;
		}
		return in_array( $this->current_post_type(), array( 'afridirect_form', 'afridirect_payment' ), true );
	}

	/**
	 * Enqueue the design system on our screens only.
	 */
	public function enqueue_assets() {
		if ( ! $this->is_plugin_screen() ) {
			return;
		}

		wp_enqueue_style(
			'afridirect-admin-ui',
			AFRIDIRECT_PAYMENT_PLUGIN_URL . 'admin/css/ui.css',
			array(),
			afridirect_payment_asset_ver( 'admin/css/ui.css' )
		);

		wp_enqueue_script(
			'afridirect-admin-ui',
			AFRIDIRECT_PAYMENT_PLUGIN_URL . 'admin/js/ui.js',
			array(),
			afridirect_payment_asset_ver( 'admin/js/ui.js' ),
			true
		);

		wp_localize_script(
			'afridirect-admin-ui',
			'afridirectAdminUi',
			array(
				'copied' => __( 'Copied!', 'afridirect-payment' ),
			)
		);
	}

	/**
	 * Add a scoping class to the admin body on our screens.
	 *
	 * @param string $classes Existing body classes.
	 * @return string
	 */
	public function body_class( $classes ) {
		if ( $this->is_plugin_screen() ) {
			$classes .= ' afd-admin';
		}
		return $classes;
	}

	/**
	 * Navigation items for the header.
	 *
	 * @return array[]
	 */
	private function nav_items() {
		$page      = $this->current_page();
		$post_type = $this->current_post_type();

		$items = array(
			array(
				'label'  => __( 'Dashboard', 'afridirect-payment' ),
				'url'    => self::page_url( 'afridirect-payment' ),
				'active' => 'afridirect-payment' === $page,
			),
			array(
				'label'  => __( 'Methods', 'afridirect-payment' ),
				'url'    => self::page_url( 'afridirect-payment-methods' ),
				'active' => 'afridirect-payment-methods' === $page,
			),
			array(
				'label'  => __( 'Forms', 'afridirect-payment' ),
				'url'    => admin_url( 'edit.php?post_type=afridirect_form' ),
				'active' => 'afridirect_form' === $post_type,
			),
			array(
				'label'  => __( 'Requests', 'afridirect-payment' ),
				'url'    => self::page_url( 'afridirect-payment-requests' ),
				'active' => 'afridirect-payment-requests' === $page,
			),
			array(
				'label'  => __( 'Payments', 'afridirect-payment' ),
				'url'    => self::page_url( 'afridirect-standalone-payments' ),
				'active' => 'afridirect-standalone-payments' === $page || 'afridirect_payment' === $post_type,
			),
		);

		if ( class_exists( 'WooCommerce' ) ) {
			$items[] = array(
				'label'  => __( 'WooCommerce', 'afridirect-payment' ),
				'url'    => self::page_url( 'afridirect-woo-payments' ),
				'active' => 'afridirect-woo-payments' === $page,
			);
		}

		$items[] = array(
			'label'  => __( 'Settings', 'afridirect-payment' ),
			'url'    => self::page_url( 'afridirect-settings' ),
			'active' => 'afridirect-settings' === $page,
		);

		return $items;
	}

	/**
	 * Render the branded header with navigation.
	 */
	public function render_header() {
		if ( ! $this->is_plugin_screen() ) {
			return;
		}
		?>
		<div class="afd-header">
			<div class="afd-header__inner">
				<a class="afd-brand" href="<?php echo esc_url( self::page_url( 'afridirect-payment' ) ); ?>">
					<img src="<?php echo esc_url( AFRIDIRECT_PAYMENT_PLUGIN_URL . 'admin/img/logo.png' ); ?>" alt="<?php esc_attr_e( 'AfriDirect Payment', 'afridirect-payment' ); ?>" width="153" height="40">
				</a>
				<nav class="afd-nav" aria-label="<?php esc_attr_e( 'AfriDirect Payment', 'afridirect-payment' ); ?>">
					<?php foreach ( $this->nav_items() as $item ) : ?>
						<a class="afd-nav__link<?php echo $item['active'] ? ' is-active' : ''; ?>" href="<?php echo esc_url( $item['url'] ); ?>" aria-current="<?php echo esc_attr( $item['active'] ? 'page' : 'false' ); ?>"><?php echo esc_html( $item['label'] ); ?></a>
					<?php endforeach; ?>
				</nav>
				<span class="afd-version">v<?php echo esc_html( AFRIDIRECT_PAYMENT_VERSION ); ?></span>
			</div>
		</div>
		<?php
	}

	/**
	 * Inline SVG icon. The markup is static; it is still passed through wp_kses().
	 *
	 * @param string $name Icon name.
	 * @return string Escaped SVG markup.
	 */
	public static function icon( $name ) {
		$paths = array(
			'bank'     => '<path d="M3 21h18"/><path d="M5 21V10"/><path d="M9 21V10"/><path d="M15 21V10"/><path d="M19 21V10"/><path d="M12 3 3 8h18L12 3z"/>',
			'wallet'   => '<path d="M3 7a2 2 0 0 1 2-2h13a1 1 0 0 1 1 1v3"/><path d="M3 7v11a2 2 0 0 0 2 2h14a1 1 0 0 0 1-1v-3"/><path d="M21 10h-5a2 2 0 0 0 0 4h5v-4z"/>',
			'bolt'     => '<path d="M13 2 4 14h7l-1 8 9-12h-7l1-8z"/>',
			'coin'     => '<circle cx="12" cy="12" r="9"/><path d="M12 7v10M9 9.5h4.5a1.75 1.75 0 0 1 0 3.5H9m0 0h5a1.75 1.75 0 0 1 0 3.5H9"/>',
			'sliders'  => '<path d="M4 6h10M18 6h2M4 12h4M12 12h8M4 18h12M20 18h0"/><circle cx="16" cy="6" r="2"/><circle cx="10" cy="12" r="2"/><circle cx="18" cy="18" r="2"/>',
			'plus'     => '<path d="M12 5v14M5 12h14"/>',
			'check'    => '<path d="m5 12 4.5 4.5L19 7"/>',
			'cart'     => '<circle cx="9" cy="20" r="1.5"/><circle cx="18" cy="20" r="1.5"/><path d="M3 4h2l2.4 11.2a1 1 0 0 0 1 .8h8.7a1 1 0 0 0 1-.8L20 8H6"/>',
			'file'     => '<path d="M6 3h9l4 4v14H6z"/><path d="M14 3v5h5M9 13h6M9 17h6"/>',
			'shield'   => '<path d="M12 3 4 6v6c0 5 3.5 8 8 9 4.5-1 8-4 8-9V6l-8-3z"/><path d="m9 12 2 2 4-4"/>',
			'lifebuoy' => '<circle cx="12" cy="12" r="9"/><circle cx="12" cy="12" r="3.5"/><path d="m5.6 5.6 3.9 3.9M14.5 14.5l3.9 3.9M18.4 5.6l-3.9 3.9M9.5 14.5l-3.9 3.9"/>',
			'inbox'    => '<path d="M4 13h4l1.5 3h5L16 13h4"/><path d="M4 13 6.5 5h11L20 13v6H4z"/>',
			'check-circle' => '<circle cx="12" cy="12" r="9"/><path d="m8 12.5 3 3 5-6"/>',
			'clock'    => '<circle cx="12" cy="12" r="9"/><path d="M12 7v5l3 2"/>',
			'hash'     => '<path d="M5 9h14M5 15h14M10 4 8 20M16 4l-2 16"/>',
			'phone'    => '<path d="M8 3h8a1 1 0 0 1 1 1v16a1 1 0 0 1-1 1H8a1 1 0 0 1-1-1V4a1 1 0 0 1 1-1z"/><path d="M11 18h2"/>',
			'globe'    => '<circle cx="12" cy="12" r="9"/><path d="M3 12h18"/><path d="M12 3c3 3.2 3 14.8 0 18"/><path d="M12 3c-3 3.2-3 14.8 0 18"/>',
		);

		if ( ! isset( $paths[ $name ] ) ) {
			return '';
		}

		$svg = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true" focusable="false">' . $paths[ $name ] . '</svg>';

		$allowed = array(
			'svg'    => array(
				'xmlns'           => true,
				'viewbox'         => true,
				'fill'            => true,
				'stroke'          => true,
				'stroke-width'    => true,
				'stroke-linecap'  => true,
				'stroke-linejoin' => true,
				'aria-hidden'     => true,
				'focusable'       => true,
			),
			'path'   => array( 'd' => true ),
			'circle' => array(
				'cx' => true,
				'cy' => true,
				'r'  => true,
			),
		);

		return wp_kses( $svg, $allowed );
	}

	/**
	 * Icon name for a payment method type.
	 *
	 * @param string $type Method type.
	 * @return string
	 */
	public static function method_icon( $type ) {
		$map = array(
			'bank'         => 'bank',
			'paypal'       => 'wallet',
			'zelle'        => 'bolt',
			'venmo'        => 'wallet',
			'cashapp'      => 'coin',
			'wise'         => 'globe',
			'payoneer'     => 'globe',
			'skrill'       => 'wallet',
			'mobile_money' => 'phone',
			'crypto'       => 'coin',
			'custom'       => 'sliders',
		);
		return isset( $map[ $type ] ) ? $map[ $type ] : 'wallet';
	}

	/**
	 * Pill markup class for a normalised review state.
	 *
	 * @param string $state One of review|approved|rejected|pending.
	 * @return string
	 */
	public static function pill_class( $state ) {
		$allowed = array( 'review', 'approved', 'rejected', 'pending' );
		return 'afd-pill afd-pill--' . ( in_array( $state, $allowed, true ) ? $state : 'pending' );
	}
}