<?php

declare(strict_types=1);

namespace App\FormBuilder\Publishing;

use App\Models\FormBuilder\FormField;
use App\Models\FormBuilder\FormFieldBinding;
use App\Models\FormBuilder\FormSchema;
use App\Models\FormBuilder\FormSchemaSection;

/**
 * RFC-WS-6 §3 (Q10) — when section_level_submit is active, identity-key
 * bindings must live in the first section (lowest sort_order).
 *
 * No-op when section_level_submit is false. Universal: wires into every
 * PurposeGuardProvider.
 */
final class IdentityKeyBindingsOnlyInFirstSection implements PublishGuard
{
    public function code(): string
    {
        return 'identity_key_bindings_only_in_first_section';
    }

    public function evaluate(FormSchema $schema): PublishGuardResult
    {
        if (! (bool) $schema->section_level_submit) {
            return PublishGuardResult::passed($this->code());
        }

        $sections = $schema->sections;
        if ($sections->isEmpty()) {
            return PublishGuardResult::passed($this->code());
        }

        /** @var FormSchemaSection $first */
        $first = $sections->sortBy('sort_order')->first();
        $firstSectionId = (string) $first->id;

        /** @var FormField $field */
        foreach ($schema->fields as $field) {
            $hasIdentityKey = false;
            /** @var FormFieldBinding $binding */
            foreach ($field->bindings as $binding) {
                if ((bool) $binding->is_identity_key) {
                    $hasIdentityKey = true;
                    break;
                }
            }

            if (! $hasIdentityKey) {
                continue;
            }

            if ((string) $field->form_schema_section_id !== $firstSectionId) {
                return PublishGuardResult::failed(
                    guardCode: $this->code(),
                    messageKey: 'form_builder_publish_guards.identity_key_bindings_only_in_first_section',
                    offendingFormFieldId: (string) $field->id,
                );
            }
        }

        return PublishGuardResult::passed($this->code());
    }
}