<?php
/**
 * wp adminkeep comments.
 *
 * @package Adminkeep
 */

namespace Adminkeep\Cli;

use Adminkeep\Service\CommentPurger;

defined( 'ABSPATH' ) || exit;

/**
 * Count and permanently delete comments.
 *
 * The same cleanup the Disable Comments panel offers. Spam and trash by
 * default; `count` prints how many comments `purge` would delete with the
 * same flags. Works whether or not the Disable Comments feature is on.
 */
class CommentsCommand {

	/**
	 * Terminal.
	 *
	 * @var Io
	 */
	private $io;

	/**
	 * Constructor.
	 *
	 * @param Io $io Terminal.
	 */
	public function __construct( Io $io ) {
		$this->io = $io;
	}

	/**
	 * Prints how many comments `purge` would delete with the same flags.
	 *
	 * ## OPTIONS
	 *
	 * [--approved]
	 * : Also count approved and pending comments, not only spam and trash.
	 *
	 * [--woo]
	 * : Also count WooCommerce order notes, webhook logs and product reviews.
	 *
	 * ## EXAMPLES
	 *
	 *     $ wp adminkeep comments count
	 *     1204
	 *
	 * @param array $args       Positional arguments.
	 * @param array $assoc_args Flags.
	 * @return void
	 */
	public function count( $args, $assoc_args ) {
		$this->io->line( (string) CommentPurger::count( ! empty( $assoc_args['approved'] ), ! empty( $assoc_args['woo'] ) ) );
	}

	/**
	 * Permanently deletes comments. Spam and trash only, unless told otherwise.
	 *
	 * Deleted comments cannot be recovered. Runs in batches, so a very
	 * large site will not time out. Works whether or not the Disable
	 * Comments feature is on.
	 *
	 * ## OPTIONS
	 *
	 * [--approved]
	 * : Also delete approved and pending comments.
	 *
	 * [--woo]
	 * : Also delete WooCommerce order notes, webhook logs and product reviews.
	 *
	 * [--yes]
	 * : Do not ask for confirmation.
	 *
	 * ## EXAMPLES
	 *
	 *     # Clear out spam and trash.
	 *     $ wp adminkeep comments purge --yes
	 *
	 *     # Delete every comment on the site.
	 *     $ wp adminkeep comments purge --approved
	 *
	 * @param array $args       Positional arguments.
	 * @param array $assoc_args Flags.
	 * @return void
	 */
	public function purge( $args, $assoc_args ) {
		$approved = ! empty( $assoc_args['approved'] );
		$woo      = ! empty( $assoc_args['woo'] );
		$total    = CommentPurger::count( $approved, $woo );

		if ( 0 === $total ) {
			$this->io->success( 'Nothing to delete.' );

			return;
		}

		if ( empty( $assoc_args['yes'] ) ) {
			$this->io->confirm( sprintf( 'Permanently delete %d comments? This cannot be undone.', $total ) );
		}

		$this->io->progress_start( 'Deleting comments', $total );

		$deleted = 0;

		do {
			$batch    = CommentPurger::delete_batch( CommentPurger::BATCH_SIZE, $approved, $woo );
			$deleted += $batch;

			// A batch that deletes nothing ends the run even if the count is not zero, the same
			// guard the REST route uses: a comment that refuses to die must not loop forever.
			if ( $batch > 0 ) {
				$this->io->progress_tick( $batch );
			}
		} while ( $batch > 0 );

		$this->io->progress_finish();

		$remaining = CommentPurger::count( $approved, $woo );

		if ( $remaining > 0 ) {
			$this->io->warning( sprintf( '%d comments could not be deleted.', $remaining ) );
		}

		$this->io->success( sprintf( 'Deleted %d comments.', $deleted ) );
	}
}