<?php
/**
 * WP-CLI: `wp elevenrank redirects import|export <file>`.
 *
 * @package ElevenRank
 * @since   1.0.0
 */

namespace ElevenRank\CLI;

use ElevenRank\Database;
use ElevenRank\Modules\Redirects\Path_Normalizer;
use ElevenRank\Modules\Redirects\Redirect_Csv;
use ElevenRank\Modules\Redirects\Redirect_Repository;
use ElevenRank\Modules\Redirects\Rule_Validator;
use ElevenRank\Settings;
use WP_CLI;
use WP_Error;

defined( 'ABSPATH' ) || exit;

// WP-CLI hands every command both argument lists, whether it needs them or not.
// phpcs:disable Generic.CodeAnalysis.UnusedFunctionParameter.FoundAfterLastUsed

/**
 * Redirects as CSV files, with the same checks as the admin screen.
 *
 * @since 1.0.0
 */
final class Redirects_Command {

	/**
	 * Settings store.
	 *
	 * @since 1.0.0
	 *
	 * @var Settings
	 */
	private $settings;

	/**
	 * Constructor.
	 *
	 * @since 1.0.0
	 *
	 * @param Settings $settings Settings store.
	 */
	public function __construct( Settings $settings ) {
		$this->settings = $settings;
	}

	/**
	 * Imports redirects from a CSV file with the columns source, destination, type, match and status.
	 *
	 * Every row is checked; rows with problems are skipped and listed.
	 *
	 * ## OPTIONS
	 *
	 * <file>
	 * : Path of the CSV file (at most 1 MB).
	 *
	 * ## EXAMPLES
	 *
	 *     wp elevenrank redirects import redirects.csv
	 *
	 * @param array<int, string>   $args       Positional arguments.
	 * @param array<string, mixed> $assoc_args Flags.
	 * @return void
	 */
	public function import( $args, $assoc_args ): void {
		if ( ! $this->ready() ) {
			return;
		}

		if ( ! is_readable( $args[0] ) ) {
			WP_CLI::error( 'The file cannot be read.' );

			return;
		}

		$result = $this->csv()->import( (string) file_get_contents( $args[0] ) ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents -- A local file named on the command line.

		if ( $result instanceof WP_Error ) {
			WP_CLI::error( $result->get_error_message() );

			return;
		}

		foreach ( $result['errors'] as $error ) {
			WP_CLI::warning( 'Line ' . $error['line'] . ': ' . $error['message'] );
		}

		WP_CLI::success( sprintf( '%d imported, %d skipped.', $result['imported'], $result['skipped'] ) );
	}

	/**
	 * Exports all redirects to a CSV file.
	 *
	 * ## OPTIONS
	 *
	 * <file>
	 * : Path of the file to write.
	 *
	 * ## EXAMPLES
	 *
	 *     wp elevenrank redirects export redirects.csv
	 *
	 * @param array<int, string>   $args       Positional arguments.
	 * @param array<string, mixed> $assoc_args Flags.
	 * @return void
	 */
	public function export( $args, $assoc_args ): void {
		if ( ! $this->ready() ) {
			return;
		}

		if ( false === file_put_contents( $args[0], $this->csv()->export() ) ) { // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_file_put_contents -- A local file named on the command line.
			WP_CLI::error( 'The file cannot be written.' );

			return;
		}

		WP_CLI::success( 'Redirects written to ' . $args[0] . '.' );
	}

	/**
	 * Whether the tables are in place; says so when they are not.
	 *
	 * @since 1.0.0
	 *
	 * @return bool
	 */
	private function ready(): bool {
		if ( Database::is_ready() ) {
			return true;
		}

		WP_CLI::error( 'The redirects table is not ready. Open the WordPress admin once, then try again.' );

		return false;
	}

	/**
	 * The CSV handler.
	 *
	 * @since 1.0.0
	 *
	 * @return Redirect_Csv
	 */
	private function csv(): Redirect_Csv {
		$repository = new Redirect_Repository();

		return new Redirect_Csv( new Rule_Validator( $repository, Path_Normalizer::from_settings( $this->settings ) ), $repository );
	}
}