<?php
/**
 * Support links, the system report and the optional deactivation feedback form.
 *
 * @package Hookbird
 */

namespace Hookbird;

defined( 'ABSPATH' ) || exit;

/**
 * Feedback and support.
 */
class Feedback {

	const NONCE = 'hookbird_feedback';

	/**
	 * Register hooks.
	 */
	public function init() {
		add_action( 'admin_enqueue_scripts', array( $this, 'assets' ) );
		// admin_footer runs before footer scripts are printed, so the dialog exists when the script starts.
		add_action( 'admin_footer', array( $this, 'modal' ) );
		add_action( 'wp_ajax_hookbird_deactivate_feedback', array( $this, 'ajax_feedback' ) );
	}

	/**
	 * Address that receives the support form and deactivation feedback. Empty means neither is ever sent.
	 *
	 * @return string
	 */
	public static function support_email() {
		$email = defined( 'HOOKBIRD_SUPPORT_EMAIL' ) ? (string) HOOKBIRD_SUPPORT_EMAIL : '';
		return is_email( $email ) ? $email : '';
	}

	/**
	 * Public support links on WordPress.org.
	 *
	 * @return array forum, review, faq URLs.
	 */
	public static function links() {
		return array(
			'forum'  => 'https://wordpress.org/support/plugin/hookbird/',
			'review' => 'https://wordpress.org/support/plugin/hookbird/reviews/#new-post',
			'faq'    => 'https://wordpress.org/plugins/hookbird/#faq',
		);
	}

	/**
	 * Reasons offered in the deactivation form, each with an optional self-help hint.
	 *
	 * @return array key => [ label, hint, link, link_label, ask ].
	 */
	public static function reasons() {
		$help = admin_url( 'admin.php?page=hookbird-help' );
		return array(
			'setup'     => array(
				'label'      => __( 'I could not get it set up', 'hookbird' ),
				'hint'       => __( 'Help & Setup has a step-by-step guide for every destination, and each one ends with a test.', 'hookbird' ),
				'link'       => $help . '#guides',
				'link_label' => __( 'Open the setup guides', 'hookbird' ),
				'ask'        => __( 'Which destination were you connecting?', 'hookbird' ),
			),
			'delivery'  => array(
				'label'      => __( 'Messages did not arrive, or arrived late', 'hookbird' ),
				'hint'       => __( 'The delivery log shows the exact response each destination sent back. Low-traffic sites may also need a real cron job.', 'hookbird' ),
				'link'       => $help . '#status',
				'link_label' => __( 'Run the system check', 'hookbird' ),
				'ask'        => __( 'What did the delivery log show?', 'hookbird' ),
			),
			'feature'   => array(
				'label'      => __( 'It is missing a feature I need', 'hookbird' ),
				'hint'       => '',
				'link'       => '',
				'link_label' => '',
				'ask'        => __( 'Which feature would have kept you?', 'hookbird' ),
			),
			'better'    => array(
				'label'      => __( 'I found a better plugin', 'hookbird' ),
				'hint'       => '',
				'link'       => '',
				'link_label' => '',
				'ask'        => __( 'Which plugin, and what does it do better?', 'hookbird' ),
			),
			'temporary' => array(
				'label'      => __( 'It is only temporary, I am debugging', 'hookbird' ),
				'hint'       => __( 'Your endpoints, settings and log are kept while the plugin is deactivated.', 'hookbird' ),
				'link'       => '',
				'link_label' => '',
				'ask'        => '',
			),
			'other'     => array(
				'label'      => __( 'Something else', 'hookbird' ),
				'hint'       => '',
				'link'       => '',
				'link_label' => '',
				'ask'        => __( 'Tell us a little more', 'hookbird' ),
			),
		);
	}

	/**
	 * Load the small form assets on the Plugins screen only.
	 *
	 * @param string $hook Admin page hook.
	 */
	public function assets( $hook ) {
		if ( 'plugins.php' !== $hook || ! current_user_can( 'activate_plugins' ) ) {
			return;
		}
		wp_enqueue_style( 'hookbird-deactivate', HOOKBIRD_URL . 'assets/deactivate.css', array(), Admin::asset_version( 'deactivate.css' ) );
		wp_enqueue_script( 'hookbird-deactivate', HOOKBIRD_URL . 'assets/deactivate.js', array(), Admin::asset_version( 'deactivate.js' ), true );
		wp_localize_script(
			'hookbird-deactivate',
			'hookbirdDeactivate',
			array(
				'ajaxUrl' => admin_url( 'admin-ajax.php' ),
				'nonce'   => wp_create_nonce( self::NONCE ),
				'sends'   => '' !== self::support_email(),
				'plugin'  => plugin_basename( HOOKBIRD_FILE ),
			)
		);
	}

	/**
	 * Print the deactivation dialog on the Plugins screen.
	 */
	public function modal() {
		$screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null;
		if ( ! $screen || ! in_array( $screen->id, array( 'plugins', 'plugins-network' ), true ) || ! current_user_can( 'activate_plugins' ) ) {
			return;
		}
		$sends = '' !== self::support_email();
		$links = self::links();
		?>
		<div class="hookbird-dx" id="hookbird-dx" role="dialog" aria-modal="true" aria-labelledby="hookbird-dx-title" hidden>
			<div class="hookbird-dx__scrim" data-hookbird-dx-close></div>
			<form class="hookbird-dx__card" id="hookbird-dx-form" tabindex="-1">
				<div class="hookbird-dx__head">
					<span class="hookbird-dx__mark" aria-hidden="true"><?php echo wp_kses( Admin::logo_svg(), Admin::svg_kses() ); ?></span>
					<div>
						<h2 id="hookbird-dx-title"><?php esc_html_e( 'Quick question before you go', 'hookbird' ); ?></h2>
						<p><?php esc_html_e( 'Why are you deactivating Hookbird? One click is enough, and it helps make the plugin better.', 'hookbird' ); ?></p>
					</div>
					<button type="button" class="hookbird-dx__x" data-hookbird-dx-close aria-label="<?php esc_attr_e( 'Close', 'hookbird' ); ?>">&times;</button>
				</div>

				<fieldset class="hookbird-dx__reasons">
					<legend class="screen-reader-text"><?php esc_html_e( 'Reason for deactivating', 'hookbird' ); ?></legend>
					<?php foreach ( self::reasons() as $hookbird_key => $hookbird_reason ) : ?>
						<div class="hookbird-dx__reason">
							<label>
								<input type="radio" name="reason" value="<?php echo esc_attr( $hookbird_key ); ?>">
								<span><?php echo esc_html( $hookbird_reason['label'] ); ?></span>
							</label>
							<?php if ( $hookbird_reason['hint'] || $hookbird_reason['ask'] ) : ?>
								<div class="hookbird-dx__more" hidden>
									<?php if ( $hookbird_reason['hint'] ) : ?>
										<p class="hookbird-dx__hint">
											<?php echo esc_html( $hookbird_reason['hint'] ); ?>
											<?php if ( $hookbird_reason['link'] ) : ?>
												<a href="<?php echo esc_url( $hookbird_reason['link'] ); ?>"><?php echo esc_html( $hookbird_reason['link_label'] ); ?></a>
											<?php endif; ?>
										</p>
									<?php endif; ?>
									<?php if ( $sends && $hookbird_reason['ask'] ) : ?>
										<textarea name="details" rows="2" maxlength="1000" placeholder="<?php echo esc_attr( $hookbird_reason['ask'] ); ?>" aria-label="<?php echo esc_attr( $hookbird_reason['ask'] ); ?>"></textarea>
									<?php endif; ?>
								</div>
							<?php endif; ?>
						</div>
					<?php endforeach; ?>
				</fieldset>

				<?php if ( $sends ) : ?>
					<label class="hookbird-dx__contact">
						<input type="checkbox" name="contact" value="1">
						<span>
							<?php
							/* translators: %s: site admin email address. */
							echo esc_html( sprintf( __( 'You may reply to me at %s', 'hookbird' ), (string) get_option( 'admin_email' ) ) );
							?>
						</span>
					</label>
					<p class="hookbird-dx__privacy"><?php esc_html_e( 'Submitting emails your answer and the Hookbird, WordPress and PHP versions to the plugin developer. Your email address and site address are included only if you tick the box above. Skip sends nothing.', 'hookbird' ); ?></p>
				<?php endif; ?>

				<div class="hookbird-dx__foot">
					<a class="hookbird-dx__help" href="<?php echo esc_url( $links['forum'] ); ?>" target="_blank" rel="noopener noreferrer"><?php esc_html_e( 'Need help instead? Ask on the support forum', 'hookbird' ); ?></a>
					<div class="hookbird-dx__btns">
						<?php if ( $sends ) : ?>
							<button type="button" class="button" data-hookbird-dx-skip><?php esc_html_e( 'Skip & deactivate', 'hookbird' ); ?></button>
						<?php else : ?>
							<button type="button" class="button" data-hookbird-dx-close><?php esc_html_e( 'Cancel', 'hookbird' ); ?></button>
						<?php endif; ?>
						<button type="submit" class="button button-primary" data-hookbird-dx-submit><?php echo $sends ? esc_html__( 'Submit & deactivate', 'hookbird' ) : esc_html__( 'Deactivate', 'hookbird' ); ?></button>
					</div>
				</div>
			</form>
		</div>
		<?php
	}

	/**
	 * Receive the form and email it to the developer. Only called when the admin clicks Submit.
	 */
	public function ajax_feedback() {
		check_ajax_referer( self::NONCE, 'nonce' );
		if ( ! current_user_can( 'activate_plugins' ) ) {
			wp_send_json_error( null, 403 );
		}
		$to = self::support_email();
		if ( '' === $to ) {
			wp_send_json_success( array( 'sent' => false ) );
		}

		$reasons = self::reasons();
		$reason  = isset( $_POST['reason'] ) ? sanitize_key( wp_unslash( $_POST['reason'] ) ) : '';
		if ( ! isset( $reasons[ $reason ] ) ) {
			wp_send_json_error( array( 'message' => 'invalid reason' ), 400 );
		}
		$details = isset( $_POST['details'] ) ? sanitize_textarea_field( wp_unslash( $_POST['details'] ) ) : '';
		$details = mb_substr( $details, 0, 1000 );
		$contact = ! empty( $_POST['contact'] );

		global $wp_version;
		$lines   = array(
			'Reason: ' . $reasons[ $reason ]['label'] . ' (' . $reason . ')',
			'Details: ' . ( '' !== $details ? $details : '-' ),
			'',
			'Hookbird: ' . HOOKBIRD_VERSION,
			'WordPress: ' . $wp_version,
			'PHP: ' . PHP_VERSION,
			'Locale: ' . get_locale(),
		);
		$headers = array();
		if ( $contact ) {
			$email   = sanitize_email( (string) get_option( 'admin_email' ) );
			$lines[] = 'Reply to: ' . $email;
			$lines[] = 'Site: ' . home_url( '/' );
			if ( is_email( $email ) ) {
				$headers[] = 'Reply-To: ' . $email;
			}
		}

		$sent = wp_mail( $to, '[Hookbird feedback] ' . $reasons[ $reason ]['label'], implode( "\n", $lines ), $headers );
		wp_send_json_success( array( 'sent' => (bool) $sent ) );
	}

	/**
	 * Plain-text system report for support requests. Contains no URLs, secrets or personal data.
	 *
	 * @return string
	 */
	public static function system_report() {
		global $wp_version;

		$endpoints = Endpoints::all();
		$formats   = array();
		$states    = array(
			'active'   => 0,
			'paused'   => 0,
			'disabled' => 0,
		);
		foreach ( $endpoints as $endpoint ) {
			$key             = isset( $endpoint['options']['preset'] ) ? $endpoint['options']['preset'] : $endpoint['format'];
			$formats[ $key ] = isset( $formats[ $key ] ) ? $formats[ $key ] + 1 : 1;
			if ( ! $endpoint['active'] ) {
				++$states['disabled'];
			} elseif ( $endpoint['paused_at'] ) {
				++$states['paused'];
			} else {
				++$states['active'];
			}
		}
		$format_list = array();
		foreach ( $formats as $key => $count ) {
			$format_list[] = $key . ' x' . $count;
		}

		$settings = Settings::all();
		$last_run = (int) get_option( 'hookbird_last_queue_run' );
		$next     = wp_next_scheduled( Installer::CRON_PROCESS );
		$errors   = array();
		$recent   = Deliveries::query(
			array(
				'status'   => 'failed',
				'per_page' => 5,
			)
		);
		foreach ( $recent['items'] as $item ) {
			$errors[] = '  ' . $item['created_at'] . ' UTC  ' . $item['event'] . '  ' . ( $item['response_code'] ? 'HTTP ' . $item['response_code'] : Formatter::truncate( preg_replace( '#https?://\S+#', '[url]', $item['error'] ), 120 ) );
		}

		$lines   = array();
		$lines[] = '### Hookbird system report ###';
		$lines[] = 'Hookbird: ' . HOOKBIRD_VERSION . ' (db ' . get_option( 'hookbird_db_version' ) . ')';
		$lines[] = 'WordPress: ' . $wp_version . ( is_multisite() ? ' (multisite)' : '' );
		$lines[] = 'PHP: ' . PHP_VERSION;
		$lines[] = 'Locale: ' . get_locale();
		$lines[] = 'WooCommerce: ' . ( defined( 'WC_VERSION' ) ? WC_VERSION : 'not active' );
		$lines[] = 'WP-Cron: ' . ( defined( 'DISABLE_WP_CRON' ) && DISABLE_WP_CRON ? 'disabled (DISABLE_WP_CRON)' : 'enabled' );
		$lines[] = 'Last queue run: ' . ( $last_run ? human_time_diff( $last_run ) . ' ago' : 'never' );
		$lines[] = 'Next queue run: ' . ( $next ? gmdate( 'Y-m-d H:i:s', $next ) . ' UTC' : 'not scheduled' );
		$lines[] = 'Safety sweep: ' . ( wp_next_scheduled( Installer::CRON_SWEEP ) ? 'scheduled' : 'missing' );
		$lines[] = 'Endpoints: ' . count( $endpoints ) . ' (' . $states['active'] . ' active, ' . $states['paused'] . ' paused, ' . $states['disabled'] . ' disabled)' . ( $format_list ? ' ' . implode( ', ', $format_list ) : '' );
		$lines[] = 'Queue: ' . Deliveries::count( 'pending' ) . ' pending, ' . Deliveries::count( 'processing' ) . ' processing, ' . Deliveries::count( 'failed' ) . ' failed, ' . Deliveries::count( 'success' ) . ' delivered';
		$lines[] = 'Settings: attempts ' . $settings['max_attempts'] . ', timeout ' . $settings['timeout'] . 's, batch ' . $settings['batch_size'] . ', retention ' . $settings['retention_days'] . 'd, pause after ' . $settings['circuit_threshold'] . ', local URLs ' . ( $settings['allow_local_urls'] ? 'allowed' : 'blocked' );
		foreach ( Onboarding::status_checks() as $check ) {
			if ( in_array( $check['status'], array( 'warn', 'fail' ), true ) ) {
				$lines[] = 'Check (' . $check['status'] . '): ' . $check['label'] . ' - ' . $check['detail'];
			}
		}
		$lines[] = 'Recent failures:' . ( $errors ? "\n" . implode( "\n", $errors ) : ' none' );
		$lines[] = '### End of report ###';

		return implode( "\n", $lines );
	}
}