<?php
namespace App\Services\FattureElettroniche;

use App\Models\Amministratore;
use App\Models\Fornitore;

class FeSubjectModuleService
{
    /**
     * @return array<string,mixed>
     */
    public function forAmministratore(?Amministratore $amministratore): array
    {
        if (! $amministratore instanceof Amministratore) {
            return $this->disabled('amministratore_non_disponibile');
        }

        $sources = ['manual_upload', 'cassetto_fiscale'];

        return [
            'enabled'                   => true,
            'subject_type'              => 'amministratore',
            'archive_scope'             => 'stabile',
            'reason'                    => null,
            'sources'                   => $sources,
            'source_labels'             => $this->sourceLabels($sources),
            'provider_contract_enabled' => (bool) ($amministratore->fe_cassetto_enabled ?? false),
            'serials_enabled'           => false,
        ];
    }

    /**
     * @return array<string,mixed>
     */
    public function forFornitore(?Fornitore $fornitore): array
    {
        if (! $fornitore instanceof Fornitore) {
            return $this->disabled('fornitore_non_disponibile');
        }

        $features = $fornitore->fe_features_safe;
        $sources  = $this->normalizeSources(data_get($features, 'invoice_import.sources', [
            'manual_upload',
            'pec',
            'cassetto_fiscale',
            'gestionale_esterno',
        ]));

        return [
            'enabled'                   => (bool) data_get($features, 'invoice_import.enabled', true),
            'subject_type'              => 'fornitore',
            'archive_scope'             => 'fornitore',
            'reason'                    => null,
            'sources'                   => $sources,
            'source_labels'             => $this->sourceLabels($sources),
            'provider_contract_enabled' => false,
            'serials_enabled'           => (bool) data_get($fornitore->operational_config_safe, 'catalog_import.track_serials_from_fe', true),
        ];
    }

    /**
     * @return array<string,mixed>
     */
    public function disabled(string $reason): array
    {
        return [
            'enabled'                   => false,
            'subject_type'              => null,
            'archive_scope'             => null,
            'reason'                    => $reason,
            'sources'                   => [],
            'source_labels'             => [],
            'provider_contract_enabled' => false,
            'serials_enabled'           => false,
        ];
    }

    /**
     * @param array<int,string> $sources
     * @return array<int,string>
     */
    public function sourceLabels(array $sources): array
    {
        $labels = [
            'manual_upload'      => 'Upload manuale',
            'pec'                => 'PEC',
            'cassetto_fiscale'   => 'Cassetto Fiscale',
            'gestionale_esterno' => 'Altro gestionale',
        ];

        return array_values(array_map(
            static fn(string $source): string => $labels[$source] ?? $source,
            $sources
        ));
    }

    /**
     * @param array<int,string>|mixed $sources
     * @return array<int,string>
     */
    private function normalizeSources(mixed $sources): array
    {
        $allowed = [
            'manual_upload'      => true,
            'pec'                => true,
            'cassetto_fiscale'   => true,
            'gestionale_esterno' => true,
        ];

        if (! is_array($sources)) {
            return ['manual_upload'];
        }

        $normalized = [];
        foreach ($sources as $source) {
            $source = trim((string) $source);
            if ($source !== '' && isset($allowed[$source])) {
                $normalized[] = $source;
            }
        }

        if ($normalized === []) {
            return ['manual_upload'];
        }

        return array_values(array_unique($normalized));
    }
}