<?php
/**
 * Safe deletion service.
 *
 * @package AdbearImageCleaner
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Cleaner class.
 */
class Adbear_Image_Cleaner_Cleaner {

	/**
	 * Constructor.
	 */
	public function __construct() {
		add_action( 'wp_ajax_adbear_safe_delete_attachment', array( $this, 'ajax_safe_delete_attachment' ) );
		add_action( 'wp_ajax_adbear_bulk_safe_delete_attachments', array( $this, 'ajax_bulk_safe_delete_attachments' ) );
	}

	/**
	 * Move attachment to trash safely.
	 *
	 * @return void
	 */
	public function ajax_safe_delete_attachment() {
		$this->ensure_permissions();
		check_ajax_referer( 'adbear_delete_nonce', 'nonce' );

		$attachment_id = isset( $_POST['attachment_id'] ) ? absint( wp_unslash( $_POST['attachment_id'] ) ) : 0;
		$status        = isset( $_POST['status'] ) ? sanitize_key( wp_unslash( $_POST['status'] ) ) : '';

		if ( ! $attachment_id ) {
			wp_send_json_error(
				array(
					'message' => __( 'Invalid attachment ID.', 'adbear-image-cleaner' ),
				),
				400
			);
		}

		if ( ! in_array( $status, Adbear_Image_Cleaner_Helpers::get_deletable_statuses(), true ) ) {
			wp_send_json_error(
				array(
					'message' => __( 'Only unused or broken images can be trashed.', 'adbear-image-cleaner' ),
				),
				400
			);
		}

		$result = $this->trash_attachment( $attachment_id, $status );
		if ( is_wp_error( $result ) ) {
			wp_send_json_error(
				array(
					'message' => $result->get_error_message(),
				),
				500
			);
		}

		wp_send_json_success(
			array(
				'message' => __( 'Image moved to trash.', 'adbear-image-cleaner' ),
				'id'      => $attachment_id,
			)
		);
	}

	/**
	 * Bulk move attachments to trash safely.
	 *
	 * @return void
	 */
	public function ajax_bulk_safe_delete_attachments() {
		$this->ensure_permissions();
		check_ajax_referer( 'adbear_delete_nonce', 'nonce' );

		$raw_items = filter_input( INPUT_POST, 'items', FILTER_DEFAULT, FILTER_REQUIRE_ARRAY );
		$raw_items = is_array( $raw_items ) ? wp_unslash( $raw_items ) : array();
		if ( ! is_array( $raw_items ) || empty( $raw_items ) ) {
			wp_send_json_error(
				array(
					'message' => __( 'No items selected.', 'adbear-image-cleaner' ),
				),
				400
			);
		}

		$deleted_ids = array();
		$failed      = array();
		$items       = array();

		foreach ( $raw_items as $raw_item ) {
			if ( ! is_array( $raw_item ) ) {
				continue;
			}

			$items[] = array(
				'id'     => isset( $raw_item['id'] ) ? absint( $raw_item['id'] ) : 0,
				'status' => isset( $raw_item['status'] ) ? sanitize_key( $raw_item['status'] ) : '',
			);
		}

		foreach ( $items as $item ) {
			if ( ! is_array( $item ) ) {
				continue;
			}

			$attachment_id = isset( $item['id'] ) ? absint( $item['id'] ) : 0;
			$status        = isset( $item['status'] ) ? sanitize_key( $item['status'] ) : '';

			if ( ! $attachment_id || ! in_array( $status, Adbear_Image_Cleaner_Helpers::get_deletable_statuses(), true ) ) {
				continue;
			}

			$result = $this->trash_attachment( $attachment_id, $status );
			if ( is_wp_error( $result ) ) {
				$failed[] = array(
					'id'      => $attachment_id,
					'message' => $result->get_error_message(),
				);
				continue;
			}

			$deleted_ids[] = $attachment_id;
		}

		wp_send_json_success(
			array(
				'deleted_ids' => $deleted_ids,
				'failed'      => $failed,
				'message'     => sprintf(
					/* translators: %d: number of deleted images */
					__( '%d images moved to trash.', 'adbear-image-cleaner' ),
					count( $deleted_ids )
				),
			)
		);
	}

	/**
	 * Safely move one attachment to trash.
	 *
	 * @param int    $attachment_id Attachment ID.
	 * @param string $status Current scan status.
	 * @return true|WP_Error
	 */
	private function trash_attachment( $attachment_id, $status ) {
		if ( ! in_array( $status, Adbear_Image_Cleaner_Helpers::get_deletable_statuses(), true ) ) {
			return new WP_Error( 'adbear_invalid_status', __( 'Only unused or broken images can be trashed.', 'adbear-image-cleaner' ) );
		}

		$post = get_post( $attachment_id );
		if ( ! $post || 'attachment' !== $post->post_type ) {
			return new WP_Error( 'adbear_attachment_missing', __( 'Attachment not found.', 'adbear-image-cleaner' ) );
		}

		$trashed = wp_trash_post( $attachment_id );
		if ( ! $trashed ) {
			return new WP_Error( 'adbear_trash_failed', __( 'Image could not be moved to trash.', 'adbear-image-cleaner' ) );
		}

		return true;
	}

	/**
	 * Ensure user permissions.
	 *
	 * @return void
	 */
	private function ensure_permissions() {
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error(
				array(
					'message' => __( 'You are not allowed to perform this action.', 'adbear-image-cleaner' ),
				),
				403
			);
		}
	}
}