<?php
declare(strict_types=1);

namespace App\Modules\Accounting;

use App\Core\Http\Request;
use App\Core\Http\Response;
use App\Core\I18n\Translator;
use App\Core\Security\Csrf;
use App\Core\Support\Flash;
use App\Core\View\Template;
use App\Modules\Auth\AuthService;
use App\Modules\Automation\AutomationService;
use App\Modules\Orders\OrdersRepository;
use App\Modules\Settings\CompanySettingsRepository;
use App\Modules\Settings\ReceiptConfigRepository;
use Throwable;

final class ReceiptController
{
    public function __construct(
        private readonly Template $template,
        private readonly Translator $translator,
        private readonly AuthService $auth,
        private readonly ReceiptRepository $receipts,
        private readonly ReceiptConfigRepository $receiptConfigs,
        private readonly CompanySettingsRepository $companySettings,
        private readonly OrdersRepository $orders,
        private readonly AutomationService $automation,
        private readonly ReceiptService $receiptService
    ) {
    }

    public function create(Request $request): Response
    {
        $orderId = max(0, (int) $request->input('id', 0));
        $details = $this->orders->findDetails($orderId);
        if ($details === null) {
            return Response::html('Not found', 404);
        }

        $configs = array_filter($this->receiptConfigs->listAll(), static fn(array $c): bool => (int) ($c['is_active'] ?? 0) === 1);
        if ($configs === []) {
            Flash::set('order.error', $this->translator->get('receipts.create.no_configs'));
            return Response::redirect('/orders/' . $orderId);
        }

        $existingReceipts = $this->receipts->findByOrderId($orderId);

        $order = is_array($details['order'] ?? null) ? $details['order'] : [];
        $items = is_array($details['items'] ?? null) ? $details['items'] : [];

        $deliveryPrice = (float) ($order['delivery_price'] ?? 0);
        $totalGross = $this->receiptService->calculateTotalGross($items, $deliveryPrice);

        $html = $this->template->render('orders/receipt-create', [
            'title' => $this->translator->get('receipts.create.title'),
            'activeMenu' => 'orders',
            'activeOrders' => 'list',
            'user' => $this->auth->user(),
            'csrfToken' => Csrf::token(),
            'orderId' => $orderId,
            'order' => $order,
            'items' => $items,
            'configs' => array_values($configs),
            'seller' => $this->companySettings->getSettings(),
            'totalGross' => $totalGross,
            'deliveryPrice' => $deliveryPrice,
            'existingReceipts' => $existingReceipts,
        ], 'layouts/app');

        return Response::html($html);
    }

    public function store(Request $request): Response
    {
        $orderId = max(0, (int) $request->input('id', 0));

        if (!Csrf::validate((string) $request->input('_token', ''))) {
            Flash::set('order.error', 'Nieprawidlowy token CSRF');
            return Response::redirect('/orders/' . $orderId);
        }

        $configId = (int) $request->input('config_id', '0');
        if ($configId <= 0) {
            Flash::set('order.error', $this->translator->get('receipts.create.no_config_selected'));
            return Response::redirect('/orders/' . $orderId . '/receipt/create');
        }

        $user = $this->auth->user();

        try {
            $result = $this->receiptService->issue([
                'order_id' => $orderId,
                'config_id' => $configId,
                'issue_date_override' => (string) $request->input('issue_date', ''),
                'created_by' => is_array($user) ? ($user['id'] ?? null) : null,
            ]);

            $userName = is_array($user) ? trim((string) ($user['name'] ?? $user['email'] ?? '')) : '';
            $this->orders->recordActivity(
                $orderId,
                'receipt_issued',
                'Wystawiono paragon: ' . $result['receipt_number'],
                ['receipt_number' => $result['receipt_number'], 'config_id' => $configId, 'total_gross' => $result['total_gross']],
                'user',
                $userName !== '' ? $userName : null
            );

            Flash::set('order.success', 'Paragon wystawiony: ' . $result['receipt_number']);

            try {
                $this->automation->trigger('receipt.created', $orderId);
            } catch (Throwable) {
            }
        } catch (ReceiptIssueException $e) {
            Flash::set('order.error', $e->getMessage());
        } catch (Throwable) {
            Flash::set('order.error', 'Blad wystawiania paragonu');
        }

        return Response::redirect('/orders/' . $orderId);
    }

    public function show(Request $request): Response
    {
        $orderId = max(0, (int) $request->input('id', 0));
        $receiptId = max(0, (int) $request->input('receiptId', 0));

        $receipt = $this->receipts->findById($receiptId);
        if ($receipt === null || (int) ($receipt['order_id'] ?? 0) !== $orderId) {
            return Response::html('Not found', 404);
        }

        $data = $this->buildReceiptViewData($receipt, $orderId);

        $html = $this->template->render('receipts/show', $data, 'layouts/app');
        return Response::html($html);
    }

    public function printView(Request $request): Response
    {
        $orderId = max(0, (int) $request->input('id', 0));
        $receiptId = max(0, (int) $request->input('receiptId', 0));

        $receipt = $this->receipts->findById($receiptId);
        if ($receipt === null || (int) ($receipt['order_id'] ?? 0) !== $orderId) {
            return Response::html('Not found', 404);
        }

        $data = $this->buildReceiptViewData($receipt, $orderId);

        $html = $this->template->render('receipts/print', $data);
        return Response::html($html);
    }

    public function pdf(Request $request): Response
    {
        $orderId = max(0, (int) $request->input('id', 0));
        $receiptId = max(0, (int) $request->input('receiptId', 0));

        $receipt = $this->receipts->findById($receiptId);
        if ($receipt === null || (int) ($receipt['order_id'] ?? 0) !== $orderId) {
            return Response::html('Not found', 404);
        }

        $data = $this->buildReceiptViewData($receipt, $orderId);

        $html = $this->template->render('receipts/print', $data);

        $dompdf = new \Dompdf\Dompdf();
        $dompdf->loadHtml($html);
        $dompdf->setPaper('A4');
        $dompdf->render();

        $filename = str_replace(['/', '\\'], '_', (string) ($receipt['receipt_number'] ?? 'receipt')) . '.pdf';

        return new Response($dompdf->output() ?: '', 200, [
            'Content-Type' => 'application/pdf',
            'Content-Disposition' => 'attachment; filename="' . $filename . '"',
        ]);
    }

    /**
     * @param array<string, mixed> $receipt
     * @return array<string, mixed>
     */
    private function buildReceiptViewData(array $receipt, int $orderId): array
    {
        $seller = json_decode((string) ($receipt['seller_data_json'] ?? '{}'), true);
        $buyer = ($receipt['buyer_data_json'] ?? null) !== null
            ? json_decode((string) $receipt['buyer_data_json'], true)
            : null;
        $items = json_decode((string) ($receipt['items_json'] ?? '[]'), true);

        $configName = '';
        $config = $this->receiptConfigs->findById((int) ($receipt['config_id'] ?? 0));
        if ($config !== null) {
            $configName = (string) ($config['name'] ?? '');
        }

        return [
            'title' => $this->translator->get('receipts.show.title') . ' ' . ($receipt['receipt_number'] ?? ''),
            'activeMenu' => 'orders',
            'activeOrders' => 'list',
            'user' => $this->auth->user(),
            'orderId' => $orderId,
            'receipt' => $receipt,
            'seller' => is_array($seller) ? $seller : [],
            'buyer' => is_array($buyer) ? $buyer : null,
            'items' => is_array($items) ? $items : [],
            'configName' => $configName,
        ];
    }
}