<?php

namespace App\Services\GesconImport\Micro;

use App\Models\Stabile;
use App\Models\Amministratore;
use App\Models\UserSetting;
use Illuminate\Support\Facades\DB;

class StabiliMicroImporter
{
    /**
     * Importa rapidamente un singolo stabile da MDB o staging minimale.
     * Ritorna array [created=>int, updated=>int, stabile_id=>int|null, data=>array].
     */
    public function import(string $legacyCode, Amministratore $amministratore, array $mapping = []): array
    {
        $legacyCode = trim($legacyCode);
        if ($legacyCode === '') {
            return ['created'=>0,'updated'=>0,'stabile_id'=>null,'data'=>[]];
        }
        // Recupera record sorgente (ordine di priorità: staging -> MDB)
        $row = $this->fetchFromStaging($legacyCode) ?: $this->fetchFromMdb($legacyCode) ?: [];
        if (empty($row)) {
            return ['created'=>0,'updated'=>0,'stabile_id'=>null,'data'=>[]];
        }
        // Applica mapping semplice campo->target (solo campi stabile.* supportati qui)
        $payload = [
            'amministratore_id' => $amministratore->id,
            'attivo' => true,
            'note' => 'Import GESCON micro',
        ];
        foreach ($mapping as $legacyKey => $target) {
            if (!isset($row[$legacyKey]) || !is_string($target)) continue;
            if (str_starts_with($target, 'stabile.')) {
                $field = substr($target, 8);
                $payload[$field] = is_string($row[$legacyKey]) ? trim($row[$legacyKey]) : $row[$legacyKey];
            }
        }
        // Codice stabile: fallback legacyCode
        if (empty($payload['codice_stabile'])) {
            $payload['codice_stabile'] = $legacyCode;
        }
        $existing = Stabile::where('amministratore_id', $amministratore->id)
            ->where(function($q) use ($legacyCode){
                $q->where('codice_stabile',$legacyCode)->orWhere('codice_interno',$legacyCode);
            })->first();
        if ($existing) {
            $existing->update($payload);
            return ['created'=>0,'updated'=>1,'stabile_id'=>$existing->id,'data'=>$row];
        }
        $created = Stabile::create($payload);
        return ['created'=>1,'updated'=>0,'stabile_id'=>$created->id,'data'=>$row];
    }

    private function fetchFromStaging(string $legacyCode): ?array
    {
        try {
            if (DB::connection('gescon_import')->getSchemaBuilder()->hasTable('stabili')) {
                $rec = DB::connection('gescon_import')->table('stabili')
                    ->where('cod_stabile',$legacyCode)
                    ->orWhere('nome_directory',$legacyCode)
                    ->orWhere('internet_cod_stab',$legacyCode)
                    ->first();
                if ($rec) return (array)$rec;
            }
            if (DB::connection('gescon_import')->getSchemaBuilder()->hasTable('condomin')) {
                $rec = DB::connection('gescon_import')->table('condomin')
                    ->where('cod_stabile',$legacyCode)
                    ->first();
                if ($rec) return (array)$rec;
            }
        } catch (\Throwable $e) {}
        return null;
    }

    private function fetchFromMdb(string $legacyCode): ?array
    {
        $mdb = UserSetting::get('gescon.mdb_stabili', '/mnt/gescon-archives/gescon/dbc/Stabili.mdb');
        $hasTools = trim((string)@shell_exec('command -v mdb-export')) !== '';
        if (!$hasTools || !is_file($mdb) || !is_readable($mdb)) return null;
        try {
            $tmp = tempnam(sys_get_temp_dir(),'mdbcsv_');
            $table = 'Stabili';
            $tables = @shell_exec(sprintf('%s -1 %s 2>/dev/null','mdb-tables',escapeshellarg($mdb))) ?: '';
            foreach (preg_split('/\r?\n/', trim($tables)) as $t){
                if (preg_match('/stabil/i',$t)){ $table=trim($t); break; }
            }
            $cmd = sprintf('%s -D %s -d %s -q %s -R "\\n" %s %s > %s 2>/dev/null',
                'mdb-export','%Y-%m-%d','|','"',escapeshellarg($mdb),escapeshellarg($table),escapeshellarg($tmp));
            @shell_exec($cmd);
            if (!filesize($tmp)) { @unlink($tmp); return null; }
            $fh=fopen($tmp,'r'); if(!$fh){@unlink($tmp);return null;}
            $headers = fgetcsv($fh,0,'|');
            if(!$headers){fclose($fh);@unlink($tmp);return null;}
            $headers = array_map(fn($h)=>strtolower(trim($h)),$headers);
            while(($cols=fgetcsv($fh,0,'|'))!==false){
                if ($cols===[null]) continue;
                if (count($cols)<count($headers)) $cols=array_pad($cols,count($headers),null);
                if (count($cols)>count($headers)) $cols=array_slice($cols,0,count($headers));
                $row=@array_combine($headers,$cols) ?: [];
                $key=$row['nome_directory'] ?? ($row['internet_cod_stab'] ?? ($row['cod_stabile'] ?? null));
                if ((string)$key === $legacyCode){ fclose($fh); @unlink($tmp); return $row; }
            }
            fclose($fh); @unlink($tmp);
        } catch (\Throwable $e) { /* ignore */ }
        return null;
    }
}