<?php
namespace StoreSuit;

defined( 'ABSPATH' ) || exit;
// phpcs:disable WordPress.Security.EscapeOutput.ExceptionNotEscaped -- Messages are returned as JSON by Admin::ajax() and shown with textContent; HTML output escapes them where printed.

/** Merchant-maintained carrier names for stores outside any built-in region. */
final class CarrierProfiles {
    private const OPTION = 'storesuit_carrier_profiles';
    private const LIMIT = 8;

    public static function names(): array {
        $saved = get_option( self::OPTION, array() );
        if ( ! is_array( $saved ) ) { return array(); }
        return array_values( array_filter( array_slice( $saved, 0, self::LIMIT ), static fn( $name ) => is_string( $name ) && $name !== '' && mb_strlen( $name ) <= 80 ) );
    }

    public static function key( string $name ): string {
        return 'favorite_' . substr( hash( 'sha256', mb_strtolower( $name ) ), 0, 16 );
    }

    public static function read(): array {
        Store::require_cap( 'manage_woocommerce' );
        return array( 'names'=>self::names(), 'limit'=>self::LIMIT, 'choices'=>Shipping::public_carriers(), 'default'=>Shipping::default_carrier() );
    }

    public static function save( array $data ): array {
        Store::require_cap( 'manage_woocommerce' );
        if ( ! isset( $data['names'] ) || ! is_string( $data['names'] ) || strlen( $data['names'] ) > 1200 ) { throw new \InvalidArgumentException( I18n::t( 'Enter carrier names, one per line.' ) ); }
        $lines = preg_split( '/\r\n|\r|\n/', $data['names'] );
        if ( count( $lines ) > self::LIMIT + 8 ) { throw new \InvalidArgumentException( I18n::t( 'Too many carrier names. Keep only your most-used carriers.' ) ); }
        $names = array(); $seen = array();
        foreach ( $lines as $line ) {
            $name = trim( sanitize_text_field( $line ) );
            if ( $name === '' ) { continue; }
            if ( mb_strlen( $name ) > 80 ) { throw new \InvalidArgumentException( I18n::t( 'A carrier name is too long.' ) ); }
            $key = mb_strtolower( $name );
            if ( isset( $seen[$key] ) ) { continue; }
            $seen[$key] = true; $names[] = $name;
        }
        if ( count( $names ) > self::LIMIT ) { throw new \InvalidArgumentException( I18n::t( 'Too many carrier names. Keep only your most-used carriers.' ) ); }
        update_option( self::OPTION, $names, false );
        return self::read();
    }
}