<?php
/**
 * First-run guide: what Tidelist does, then connect, map categories, preview, done.
 *
 * @package Tidelist
 */

namespace Tidelist\Admin;

use Tidelist\Mapping\CategoryMap;
use Tidelist\Plugin;
use Tidelist\Support\Text;

/**
 * Onboarding screen.
 */
final class OnboardingPage {

	const FINISH         = 'tidelist_onboarding_finish';
	const OPTION_DONE    = 'tidelist_onboarded';
	const OPTION_PREVIEW = 'tidelist_previewed';
	const REDIRECT_FLAG  = 'tidelist_activation_redirect';

	/**
	 * Plugin.
	 *
	 * @var Plugin
	 */
	private $plugin;

	/**
	 * Constructor.
	 *
	 * @param Plugin $plugin Plugin.
	 */
	public function __construct( Plugin $plugin ) {
		$this->plugin = $plugin;
	}

	/**
	 * Registers the handler and the redirect after activation.
	 */
	public function register(): void {
		add_action( 'admin_post_' . self::FINISH, array( $this, 'finish' ) );
		add_action( 'admin_init', array( $this, 'maybe_redirect' ) );
	}

	/**
	 * After the plugin is activated for the first time, opens the guide once.
	 */
	public function maybe_redirect(): void {
		if ( ! get_transient( self::REDIRECT_FLAG ) ) {
			return;
		}
		delete_transient( self::REDIRECT_FLAG );
		if ( wp_doing_ajax() || isset( $_GET['activate-multi'] ) || get_option( self::OPTION_DONE ) || ! current_user_can( Plugin::CAPABILITY ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- only checks whether WordPress is activating several plugins.
			return;
		}
		wp_safe_redirect( Menu::welcome_url() );
		exit;
	}

	/**
	 * Marks the guide as finished.
	 */
	public function finish(): void {
		if ( ! current_user_can( Plugin::CAPABILITY ) ) {
			wp_die( esc_html__( 'You are not allowed to do this.', 'tidelist' ), '', array( 'response' => 403 ) );
		}
		check_admin_referer( self::FINISH );
		update_option( self::OPTION_DONE, 1, false );
		wp_safe_redirect( Menu::listings_url() );
		exit;
	}

	/**
	 * Where the guide stands.
	 */
	private function facts(): array {
		$settings = $this->plugin->settings();
		return array(
			$this->plugin->channel()->is_connected(),
			count( $this->plugin->category_map()->all() ),
			'' !== trim( (string) $settings->get( 'contact_name' ) ) && $this->plugin->channel()->is_configured(),
			(bool) get_option( self::OPTION_PREVIEW ),
		);
	}

	/**
	 * Renders the page.
	 */
	public function render(): void {
		$channel_label = $this->plugin->channel()->label();
		if ( ! current_user_can( Plugin::CAPABILITY ) ) {
			return;
		}
		list( $connected, $mapped, $contact, $previewed ) = $this->facts();
		$steps   = array_column( OnboardingSteps::steps( $connected, $mapped, $contact, $previewed ), 'done', 'id' );
		$current = OnboardingSteps::current( $connected, $mapped, $contact, $previewed );
		$cards   = array(
			OnboardingSteps::WELCOME    => array(
				__( 'Welcome to Tidelist', 'tidelist' ),
				Text::channel( __( 'Tidelist lists your WooCommerce products on {channel} and keeps the adverts in step with your shop: when an item sells out, its advert comes down. You choose what goes online and when. Nothing is published without you.', 'tidelist' ), $channel_label ) . ' ' . Text::channel( __( 'Dry-run is ON from the start: Tidelist builds and logs every advert but sends nothing that changes {channel}. You switch dry-run off yourself when you are ready, in Settings.', 'tidelist' ), $channel_label ),
				'',
				'',
			),
			OnboardingSteps::CONNECT    => array(
				Text::channel( __( '1. Connect your {channel} account', 'tidelist' ), $channel_label ),
				Text::channel( __( 'Choose your country, register your own {channel} developer app and connect your account. Also enter the contact name and the city for your adverts in Settings.', 'tidelist' ), $channel_label ),
				Menu::connect_url(),
				__( 'Open the Connect screen', 'tidelist' ),
			),
			OnboardingSteps::CATEGORIES => array(
				__( '2. Map your categories', 'tidelist' ),
				Text::channel( __( 'Say which {channel} category each of your shop categories belongs to, then check the {channel} fields such as condition and size.', 'tidelist' ), $channel_label ),
				Menu::categories_url(),
				__( 'Map categories', 'tidelist' ),
			),
			OnboardingSteps::PREVIEW    => array(
				__( '3. Preview a few products', 'tidelist' ),
				__( 'Open the preview of three products on the Listings screen. It shows exactly what would be sent and what is still missing.', 'tidelist' ),
				Menu::listings_url(),
				__( 'Open the Listings', 'tidelist' ),
			),
		);
		?>
		<div class="wrap tidelist">
			<h1><?php esc_html_e( 'Get started with Tidelist', 'tidelist' ); ?></h1>
			<?php foreach ( $cards as $id => $card ) : ?>
				<div class="card" style="max-width:800px;margin:12px 0;<?php echo $id === $current ? 'border-left:4px solid #2271b1;' : ''; ?>">
					<h2 style="margin-top:0;">
						<?php echo esc_html( $card[0] ); ?>
						<?php if ( ! empty( $steps[ $id ] ) && OnboardingSteps::WELCOME !== $id ) : ?>
							<span aria-hidden="true" style="color:#00a32a;">✓</span>
						<?php endif; ?>
					</h2>
					<p><?php echo esc_html( $card[1] ); ?></p>
					<?php if ( '' !== $card[2] ) : ?>
						<p><a class="button<?php echo $id === $current ? ' button-primary' : ''; ?>" href="<?php echo esc_url( $card[2] ); ?>"><?php echo esc_html( $card[3] ); ?></a></p>
					<?php endif; ?>
				</div>
			<?php endforeach; ?>
			<div class="card" style="max-width:800px;margin:12px 0;">
				<h2 style="margin-top:0;"><?php esc_html_e( '4. You are ready', 'tidelist' ); ?></h2>
				<p><?php echo esc_html( Text::channel( __( 'Select the products you want on {channel}, check the preview, then publish a small first batch. Keep dry-run on until you have looked at the log.', 'tidelist' ), $channel_label ) ); ?></p>
				<form method="post" action="<?php echo esc_url( admin_url( 'admin-post.php' ) ); ?>">
					<input type="hidden" name="action" value="<?php echo esc_attr( self::FINISH ); ?>" />
					<?php wp_nonce_field( self::FINISH ); ?>
					<button type="submit" class="button<?php echo OnboardingSteps::DONE === $current ? ' button-primary' : ''; ?>"><?php esc_html_e( 'Finish the guide', 'tidelist' ); ?></button>
				</form>
			</div>
		</div>
		<?php
	}
}