<?php

declare(strict_types=1);

namespace App\Http\Resources\FormBuilder;

use App\Models\FormBuilder\FormSchema;
use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;

/**
 * Public-facing schema response for /public/forms/{public_token}. Strictly
 * limited per ARCH §10: only fields with is_portal_visible=true AND
 * is_admin_only=false; no PII hints, no role_restrictions bleed, no
 * submissions_count.
 *
 * @mixin FormSchema
 */
final class PublicFormSchemaResource extends JsonResource
{
    /**
     * @return array<string, mixed>
     */
    public function toArray(Request $request): array
    {
        $this->resource->loadMissing(['fields', 'sections']);

        $visibleFields = $this->fields
            ->filter(fn ($f) => (bool) $f->is_portal_visible && ! (bool) $f->is_admin_only)
            ->values();

        return [
            'id' => $this->id,
            'name' => $this->name,
            'slug' => $this->slug,
            'purpose' => $this->purpose instanceof \BackedEnum ? $this->purpose->value : $this->purpose,
            'description' => $this->description,
            'locale' => $this->locale,
            'consent_version' => $this->consent_version,
            'submission_deadline' => optional($this->submission_deadline)->toIso8601String(),
            'section_level_submit' => (bool) $this->section_level_submit,
            'sections' => $this->sections->map(fn ($s) => [
                'id' => $s->id,
                'slug' => $s->slug,
                'name' => $s->name,
                'description' => $s->description,
                'sort_order' => (int) $s->sort_order,
            ])->values()->all(),
            'fields' => $visibleFields->map(fn ($f) => [
                'id' => $f->id,
                'slug' => $f->slug,
                'field_type' => $f->field_type,
                'label' => $f->label,
                'help_text' => $f->help_text,
                'options' => is_array($f->options) ? array_values($f->options) : null,
                'validation_rules' => $f->validation_rules,
                'is_required' => (bool) $f->is_required,
                'display_width' => $f->display_width instanceof \BackedEnum ? $f->display_width->value : $f->display_width,
                'conditional_logic' => $f->conditional_logic,
                'sort_order' => (int) $f->sort_order,
                'form_schema_section_id' => $f->form_schema_section_id,
            ])->values()->all(),
        ];
    }
}