<?php

namespace App\Filament\Pages\Contabilita;

use App\Models\GestioneContabile;
use App\Models\User;
use App\Models\DatiBancari;
use App\Services\Contabilita\IntesaCsvParser;
use App\Services\Contabilita\ExcelMovimentiParser;
use App\Services\Contabilita\MovimentiBancaImporter;
use App\Services\Contabilita\UnicreditWriParser;
use App\Support\StabileContext;
use BackedEnum;
use Filament\Actions\Action;
use Filament\Forms\Components\FileUpload;
use Filament\Forms\Components\Select;
use Filament\Forms\Components\Toggle;
use Filament\Notifications\Notification;
use Filament\Pages\Page;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Storage;
use UnitEnum;

class CaricamentoDatiBanca extends Page
{
    protected static ?string $navigationLabel = 'Caricamento dati banca';

    protected static ?string $title = 'Caricamento dati banca';

    protected static BackedEnum|string|null $navigationIcon = 'heroicon-o-arrow-up-tray';

    protected static UnitEnum|string|null $navigationGroup = 'Contabilità';

    protected static ?int $navigationSort = 15;

    protected static ?string $slug = 'contabilita/caricamento-dati-banca';

    protected string $view = 'filament.pages.contabilita.caricamento-dati-banca';

    protected function getHeaderActions(): array
    {
        return [
            Action::make('importa_unicredit_wri')
                ->label('Importa estratto (Unicredit WRI)')
                ->icon('heroicon-o-arrow-up-tray')
                ->modalWidth('7xl')
                ->form($this->getImportFormSchema())
                ->action(function (array $data): void {
                    $this->runImport('unicredit', $data);
                }),

            Action::make('importa_intesa_csv')
                ->label('Importa estratto (Intesa CSV)')
                ->icon('heroicon-o-arrow-up-tray')
                ->modalWidth('7xl')
                ->form($this->getImportFormSchema())
                ->action(function (array $data): void {
                    $this->runImport('intesa', $data);
                }),
        ];
    }

    private function getImportFormSchema(): array
    {
        return [
            Select::make('iban')
                ->label('Conto (IBAN)')
                ->native(false)
                ->searchable()
                ->options(fn(): array => $this->getIbanOptions())
                ->helperText('Consigliato: seleziona il conto per associare i movimenti.'),

            Select::make('gestione_id')
                ->label('Gestione (opzionale)')
                ->native(false)
                ->searchable()
                ->options(fn(): array => $this->getGestioneOptions())
                ->default(fn(): ?string => $this->resolveDefaultGestioneId()),

            FileUpload::make('file')
                ->label('File estratto')
                ->directory('tmp/banca')
                ->disk('local')
                ->required(),

            Toggle::make('replace')
                ->label('Sostituisci import nel periodo')
                ->helperText('Elimina SOLO i movimenti importati e NON riconciliati (registrazione vuota) per lo stesso conto e per l\'intervallo date del file, poi reimporta.')
                ->default(false),
        ];
    }

    private function runImport(string $tipo, array $data): void
    {
        $user = Auth::user();
        if (! $user instanceof User) {
            Notification::make()->title('Utente non valido')->danger()->send();
            return;
        }

        $stabileId = StabileContext::resolveActiveStabileId($user);
        if (! $stabileId) {
            Notification::make()->title('Seleziona uno stabile')->danger()->send();
            return;
        }

        $path = (string) ($data['file'] ?? '');
        if ($path === '') {
            Notification::make()->title('Seleziona un file')->danger()->send();
            return;
        }

        try {
            $content = Storage::disk('local')->get($path);
            $importer = new MovimentiBancaImporter(new UnicreditWriParser(), new IntesaCsvParser(), new ExcelMovimentiParser());

            $iban = isset($data['iban']) && is_string($data['iban']) && trim($data['iban']) !== '' ? trim((string) $data['iban']) : null;
            $gestioneId = isset($data['gestione_id']) && is_numeric($data['gestione_id']) ? (int) $data['gestione_id'] : null;
            $replace = isset($data['replace']) ? (bool) $data['replace'] : false;

            if ($tipo === 'intesa') {
                $res = $importer->importIntesaCsv($content, $stabileId, basename($path), $iban, $gestioneId, $replace);
            } else {
                $res = $importer->importUnicreditWri($content, $stabileId, basename($path), $iban, $gestioneId, $replace);
            }

            Notification::make()
                ->title('Import completato')
                ->body('Importati: ' . ($res['imported'] ?? 0) . ' · Duplicati: ' . ($res['duplicates'] ?? 0))
                ->success()
                ->send();
        } catch (\Throwable $e) {
            Notification::make()->title('Errore import')->body($e->getMessage())->danger()->send();
        } finally {
            try {
                Storage::disk('local')->delete($path);
            } catch (\Throwable) {
                // ignore
            }
        }
    }

    private function getIbanOptions(): array
    {
        $user = Auth::user();
        if (! $user instanceof User) {
            return [];
        }

        $stabileId = StabileContext::resolveActiveStabileId($user);
        if (! $stabileId) {
            return [];
        }

        $opts = [];
        foreach (
            DatiBancari::query()
                ->where('stabile_id', $stabileId)
                ->orderBy('denominazione_banca')
                ->orderBy('iban')
                ->get(['iban', 'denominazione_banca']) as $c
        ) {
            $iban = is_string($c->iban) ? trim($c->iban) : '';
            if ($iban === '') {
                continue;
            }
            $label = trim(($c->denominazione_banca ?: 'Banca') . ' · ' . $iban);
            $opts[$iban] = $label;
        }

        return $opts;
    }

    private function getGestioneOptions(): array
    {
        $user = Auth::user();
        if (! $user instanceof User) {
            return [];
        }

        $stabileId = StabileContext::resolveActiveStabileId($user);
        if (! $stabileId) {
            return [];
        }

        if (! DB::getSchemaBuilder()->hasTable('gestioni_contabili')) {
            return [];
        }

        return GestioneContabile::query()
            ->where('stabile_id', $stabileId)
            ->orderByDesc('anno_gestione')
            ->orderBy('tipo_gestione')
            ->orderByDesc('id')
            ->get(['id', 'denominazione', 'protocollo_prefix', 'stato'])
            ->mapWithKeys(fn(GestioneContabile $g) => [
                (string) $g->id => trim(($g->protocollo_prefix ? $g->protocollo_prefix . ' · ' : '') . $g->denominazione) . ($g->stato !== 'aperta' ? (' (' . $g->stato . ')') : ''),
            ])
            ->all();
    }

    private function resolveDefaultGestioneId(): ?string
    {
        $user = Auth::user();
        if (! $user instanceof User) {
            return null;
        }

        $stabileId = StabileContext::resolveActiveStabileId($user);
        if (! $stabileId) {
            return null;
        }

        if (! DB::getSchemaBuilder()->hasTable('gestioni_contabili')) {
            return null;
        }

        $g = GestioneContabile::query()
            ->where('stabile_id', $stabileId)
            ->orderByDesc('anno_gestione')
            ->orderByDesc('id')
            ->first(['id']);

        return $g ? (string) $g->id : null;
    }
}