<?php

namespace WooOrderCart\Front\Runtime;

final class PortalSummaryStyleResolver {
    private const SECTION = 'checkout_style_settings_tabs';
    private const DEFAULT_PANEL_BACKGROUND = '#f5f5f5';
    private const DEFAULT_SURFACES = [ 'checkout', 'cart', 'thankyou' ];
    private const ALLOWED_SURFACES = [ 'checkout', 'cart', 'thankyou' ];

    /**
     * @return array{summary_panel_background?:string}
     */
    public static function build_for_surface( string $surface ): array {
        $surface = sanitize_key( $surface );

        if ( ! in_array( $surface, self::ALLOWED_SURFACES, true ) ) {
            return [];
        }

        if ( ! in_array( $surface, self::surfaces(), true ) ) {
            return [];
        }

        return [
            'summary_panel_background' => self::panel_background(),
        ];
    }

    public static function panel_background(): string {
        $raw = self::option( 'ips_portal_summary_panel_background', self::DEFAULT_PANEL_BACKGROUND );
        $color = is_scalar( $raw ) ? trim( (string) $raw ) : '';

        if ( function_exists( 'sanitize_hex_color' ) ) {
            $sanitized = sanitize_hex_color( $color );
            return is_string( $sanitized ) && '' !== $sanitized ? strtolower( $sanitized ) : self::DEFAULT_PANEL_BACKGROUND;
        }

        return preg_match( '/^#[0-9a-fA-F]{3}([0-9a-fA-F]{3})?$/', $color )
            ? strtolower( $color )
            : self::DEFAULT_PANEL_BACKGROUND;
    }

    /**
     * @return array<int,string>
     */
    public static function surfaces(): array {
        $raw = self::option( 'ips_portal_summary_panel_background_surfaces', self::DEFAULT_SURFACES );

        if ( ! is_array( $raw ) ) {
            return self::DEFAULT_SURFACES;
        }

        return array_values(
            array_filter(
                array_map(
                    static function ( $surface ): string {
                        return is_scalar( $surface ) ? sanitize_key( (string) $surface ) : '';
                    },
                    $raw
                ),
                static function ( string $surface ): bool {
                    return in_array( $surface, self::ALLOWED_SURFACES, true );
                }
            )
        );
    }

    /**
     * @param mixed $default
     * @return mixed
     */
    private static function option( string $key, $default ) {
        if ( function_exists( 'wooordercart_get_cached_option' ) ) {
            return wooordercart_get_cached_option( $key, self::SECTION, $default );
        }

        if ( function_exists( 'wooordercart_get_option' ) ) {
            return wooordercart_get_option( $key, self::SECTION, $default );
        }

        return $default;
    }
}