<?php
/**
 * Return reasons.
 *
 * Merchants edit the list as plain lines in Settings. Each reason is stored
 * on the item by its key (a slug of the label), so analytics still group old
 * requests after a reason's wording is tweaked in a way that keeps the slug.
 * Keys no longer in the list are shown as a readable version of the slug.
 *
 * @package ReturnKit
 */

namespace ReturnKit\Domain;

use ReturnKit\Core\Settings;

defined( 'ABSPATH' ) || exit;

/**
 * Reasons.
 */
class Reasons {

	/**
	 * Reasons as key => label.
	 *
	 * @return array<string,string>
	 */
	public static function all() {
		$defaults = Settings::defaults();
		if ( (string) Settings::get( 'reasons' ) === $defaults['reasons'] ) {
			// Untouched defaults: show them in the site language.
			$labels = self::default_labels();
			$keys = array_map( array( __CLASS__, 'key' ), explode( "\n", $defaults['reasons'] ) );
			$out  = array_combine( $keys, $labels );
		} else {
			$out = array();
			foreach ( Settings::lines( 'reasons' ) as $label ) {
				$out[ self::key( $label ) ] = $label;
			}
		}
		/**
		 * Filters the return reasons offered to customers.
		 *
		 * @param array<string,string> $reasons key => label.
		 */
		return (array) apply_filters( 'rtkt_reasons', $out );
	}

	/**
	 * The default reasons in the site language.
	 *
	 * @return string[]
	 */
	public static function default_labels() {
		return array(
			__( 'Wrong size or fit', 'returnkit' ),
			__( 'Damaged or defective', 'returnkit' ),
			__( 'Not as described', 'returnkit' ),
			__( 'Wrong item sent', 'returnkit' ),
			__( 'Changed my mind', 'returnkit' ),
			__( 'Arrived too late', 'returnkit' ),
			__( 'Other', 'returnkit' ),
		);
	}

	/**
	 * Key for a reason label.
	 *
	 * @param string $label Label.
	 * @return string
	 */
	public static function key( $label ) {
		$key = sanitize_title( (string) $label );
		return '' !== $key ? substr( $key, 0, 100 ) : 'reason-' . substr( md5( (string) $label ), 0, 8 );
	}

	/**
	 * Label for a stored reason key (falls back to the key itself).
	 *
	 * @param string $key Key.
	 * @return string
	 */
	public static function label( $key ) {
		if ( '' === (string) $key ) {
			return '';
		}
		if ( 'withdrawal' === $key ) {
			return __( 'Withdrawal (no reason needed)', 'returnkit' );
		}
		$all = self::all();
		return isset( $all[ $key ] ) ? $all[ $key ] : ucfirst( str_replace( '-', ' ', (string) $key ) );
	}
}