<?php

declare(strict_types=1);

namespace Queue\Jobs;

use App\Modules\Invoices\InvoiceModel;
use App\Services\AiExtractionService;
use Throwable;

final class ExtractInvoiceJob
{
    public function __construct(
        private readonly InvoiceModel $invoiceModel,
        private readonly AiExtractionService $aiExtraction
    ) {}

    public function handle(array $payload): void
    {
        $invoiceId = $payload['invoice_id'];
        $filePath = $payload['file_path'];
        $mimeType = $payload['mime_type'];

        // Update status to extracting
        $this->invoiceModel->update($invoiceId, ['status' => 'extracting']);

        try {
            $extractedData = $this->aiExtraction->extractInvoiceData($filePath, $mimeType);
            
            // Map AI data to schema columns
            $this->invoiceModel->update($invoiceId, [
                'status' => 'extracted',
                'invoice_number' => $extractedData['invoice_number'] ?? null,
                'invoice_date' => $extractedData['invoice_date'] ?? null,
                'supplier_name' => $extractedData['supplier_name'] ?? null,
                'supplier_tin' => $extractedData['supplier_tin'] ?? null,
                'buyer_name' => $extractedData['buyer_name'] ?? null,
                'buyer_tin' => $extractedData['buyer_tin'] ?? null,
                'subtotal' => $extractedData['subtotal'] ?? 0,
                'tax_amount' => $extractedData['tax_amount'] ?? 0,
                'discount_total' => $extractedData['discount_total'] ?? 0,
                'grand_total' => $extractedData['grand_total'] ?? 0,
                'ai_confidence_score' => $extractedData['confidence'] ?? null,
                'ai_provider' => $extractedData['provider'] ?? 'gemini',
                'ai_raw_response' => json_encode($extractedData, JSON_UNESCAPED_UNICODE),
            ]);

            // Also insert invoice_lines:
            if (!empty($extractedData['lines'])) {
                $db = \App\Core\Database::getInstance();
                $db->prepare("DELETE FROM invoice_lines WHERE invoice_id = ?")->execute([$invoiceId]);
                foreach ($extractedData['lines'] as $i => $line) {
                    $db->prepare("INSERT INTO invoice_lines (id, invoice_id, line_number, description, quantity, unit_price, discount, tax_rate, tax_amount, line_total) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)")
                    ->execute([
                        \Ramsey\Uuid\Uuid::uuid4()->toString(),
                        $invoiceId, $i + 1,
                        $line['description'] ?? '',
                        $line['quantity'] ?? 1,
                        $line['unit_price'] ?? 0,
                        $line['discount'] ?? 0,
                        $line['tax_rate'] ?? 0.16,
                        $line['tax_amount'] ?? 0,
                        $line['line_total'] ?? 0,
                    ]);
                }
            }
        } catch (Throwable $e) {
            $this->invoiceModel->update($invoiceId, [
                'status' => 'validation_failed'
            ]);
            throw $e;
        }
    }
}