<?php
/**
 * CSV export service.
 *
 * @package AdbearImageCleaner
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Exporter class.
 */
class Adbear_Image_Cleaner_Exporter {

	/**
	 * Scanner service.
	 *
	 * @var Adbear_Image_Cleaner_Scanner
	 */
	private $scanner;

	/**
	 * Constructor.
	 *
	 * @param Adbear_Image_Cleaner_Scanner $scanner Scanner service.
	 */
	public function __construct( Adbear_Image_Cleaner_Scanner $scanner ) {
		$this->scanner = $scanner;
		add_action( 'admin_post_adbear_export_csv', array( $this, 'export_csv' ) );
	}

	/**
	 * Export current unused scan result set to CSV.
	 *
	 * @return void
	 */
	public function export_csv() {
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html__( 'You are not allowed to perform this action.', 'adbear-image-cleaner' ) );
		}

		check_admin_referer( 'adbear_export_csv', 'adbear_export_nonce' );

		$rows = $this->scanner->get_unused_results();
		$filename = sanitize_file_name( 'adbear-image-cleaner-' . gmdate( 'Ymd-His' ) . '.csv' );

		nocache_headers();
		header( 'Content-Type: text/csv; charset=utf-8' );
		header( 'Content-Disposition: attachment; filename="' . $filename . '"' );

		$output = fopen( 'php://output', 'w' );
		if ( ! $output ) {
			wp_die( esc_html__( 'Could not generate CSV output.', 'adbear-image-cleaner' ) );
		}

		fputcsv( $output, array( 'Attachment ID', 'File Name', 'File Path', 'File Size', 'Upload Date', 'Status' ) );

		foreach ( $rows as $row ) {
			fputcsv(
				$output,
				array(
					isset( $row['id'] ) ? (int) $row['id'] : 0,
					isset( $row['file_name'] ) ? (string) $row['file_name'] : '',
					isset( $row['file_path'] ) ? (string) $row['file_path'] : '',
					isset( $row['file_size'] ) ? (int) $row['file_size'] : 0,
					isset( $row['upload_date'] ) ? (string) $row['upload_date'] : '',
					isset( $row['status_text'] ) ? (string) $row['status_text'] : '',
				)
			);
		}

		exit;
	}
}