<?php

declare(strict_types=1);

namespace App\Services;

use App\Models\InvestmentLegalSource;
use App\Models\User;
use App\Support\IsolatedQaDatabase;
use App\Support\StructuredData;
use Illuminate\Support\Facades\DB;

/** Exact operation-level IVA calculation against an explicit QA draft; never a payment/return total. */
final class SimulationFiscalQaPreview
{
    /**
     * @param  array<array-key, mixed>  $input
     * @return array<array-key, mixed>
     */
    public function create(User $actor, string $ruleId, array $input, string $key): array
    {
        abort_unless(IsolatedQaDatabase::allowsSchemaChanges(), 404);

        return DB::transaction(function () use ($actor, $ruleId, $input, $key): array {
            $rule = app(SimulationTaxRuleGovernance::class)->show($actor, $ruleId);
            abort_unless($rule->status === 'draft' && $rule->rule_code === 'IVA-GERAL-BASE-LIQUIDA', 422,
                'Seleccione o rascunho do primeiro lote fiscal.');
            abort_if(collect(StructuredData::collectionItems($rule->rule_definition['nodes'] ?? []))->contains(fn (array $node): bool => ($node['op'] ?? null) === 'round'), 422,
                'Este percurso preserva o valor exacto e não aplica arredondamento automático.');
            $source = InvestmentLegalSource::findOrFail($rule->legal_source_id);
            $version = $rule->attributesToArray();
            $version['source'] = $source->attributesToArray();
            $date = $input['reference_date'];
            $context = ['operation' => $input['operation'], 'currency' => $input['currency']];
            $missing = [];
            $resolution = [];
            $evaluation = null;
            if ($date < '2026-01-01' || $date > '2026-12-31') {
                $missing[] = 'demonstrated_coverage';
            } else {
                $resolution = app(SimulationTaxParameterResolver::class)->resolveDraftForQa([$version], 'IVA', $date, $date, $context);
                $rate = collect($resolution)->firstWhere('parameter_code', 'IVA_GENERAL_RATE');
                if (($rate['status'] ?? null) !== 'resolved' || ($rate['unit'] ?? null) !== 'percent') {
                    $missing[] = 'eligible_parameter';
                } else {
                    $evaluation = app(SimulationTaxRuleExpression::class)->evaluate($rule->rule_definition,
                        ['base_tributavel' => $input['base']], ['iva_general_rate' => $rate['value']]);
                }
            }
            $snapshot = app(SimulationFiscalSnapshot::class)->build($version, $input, $resolution, $evaluation, $missing);

            return app(SimulationExecution::class)->createFiscalQaPreview($snapshot, $actor->id, $key);
        });
    }
}