<?php

namespace App\Support;

final class LocalizedSchema
{
    /**
     * @param  array<string, mixed>|null  $i18n
     */
    public static function pick(string $locale, string $fallback, ?array $i18n): string
    {
        if ($locale === PortalLocale::EN) {
            $en = trim((string) ($i18n['en'] ?? ''));
            if ($en !== '') {
                return $en;
            }
        }

        return $fallback;
    }

    /**
     * @param  array<string, mixed>  $field
     */
    public static function fieldText(array $field, string $locale, string $key): string
    {
        $fallback = trim((string) ($field[$key] ?? ''));
        $i18n = $field[$key.'_i18n'] ?? null;

        return self::pick($locale, $fallback, is_array($i18n) ? $i18n : null);
    }

    /**
     * @param  array<string, mixed>  $option
     */
    public static function optionLabel(array $option, string $locale): string
    {
        $fallback = trim((string) ($option['label'] ?? $option['value'] ?? ''));
        $i18n = $option['label_i18n'] ?? null;

        return self::pick($locale, $fallback, is_array($i18n) ? $i18n : null);
    }

    /**
     * @param  list<mixed>|null  $schemaJson
     * @return array<string, mixed>|null
     */
    public static function fieldByKey(?array $schemaJson, string $key): ?array
    {
        if (! is_array($schemaJson)) {
            return null;
        }
        foreach ($schemaJson as $row) {
            if (is_array($row) && trim((string) ($row['key'] ?? '')) === $key) {
                return $row;
            }
        }

        return null;
    }

    /**
     * @param  array<string, mixed>  $field
     */
    public static function optionLabelForValue(array $field, string $value, string $locale): string
    {
        $opts = $field['options'] ?? [];
        if (! is_array($opts)) {
            return $value;
        }
        foreach ($opts as $opt) {
            if (! is_array($opt)) {
                continue;
            }
            if (trim((string) ($opt['value'] ?? '')) === $value) {
                return self::optionLabel($opt, $locale);
            }
        }

        return $value;
    }
}