# Quick start

<?php

require_once 'vendor/autoload.php';

use PhpFacturae\Invoice;
use PhpFacturae\Party;

$invoice = Invoice::create('FAC-001')
    ->series('A')
    ->date('2025-03-01')
    ->seller(
        Party::company('B12345678', 'My Company S.L.')
            ->address('C/ Mayor 10', '28013', 'Madrid', 'Madrid')
            ->email('info@mycompany.es')
    )
    ->buyer(
        Party::person('12345678Z', 'Laura', 'Gómez', 'Ruiz')
            ->address('C/ Sol 3', '28012', 'Madrid', 'Madrid')
            ->email('laura@example.com')
    )
    ->line('Logo design', price: 450.00, vat: 21)
    ->transferPayment(
        iban: 'ES91 2100 0418 4502 0005 1332',
        dueDate: '2025-03-31'
    )
    ->export('invoice.xml');

echo "✓ Invoice generated: invoice.xml\n";

$invoice->line(
    description: 'IT consulting',
    price: 500.00,
    vat: 21,
    irpf: 15
);

$invoice->line('Product shipped to the Canary Islands', price: 100, igic: 7);

$invoice->line('Retail product', price: 100, vat: 21, surcharge: 5.2);

$invoice->exemptLine('Training course', price: 2000, reason: 'Exempt under Art. 20 LIVA');

use PhpFacturae\Entities\TaxBreakdown;
use PhpFacturae\Enums\Tax;

$invoice->customLine(
    description: 'Product with multiple taxes',
    price: 300.00,
    taxes: [
        new TaxBreakdown(Tax::IGIC, 7),
        new TaxBreakdown(Tax::REIGIC, 0.5),
    ]
);

use PhpFacturae\Enums\PaymentMethod;

$invoice->splitPayments(
    method: PaymentMethod::Transfer,
    installments: 3,
    firstDueDate: '2025-04-01',
    intervalDays: 30,
    iban: 'ES91 2100 0418 4502 0005 1332'
);

use PhpFacturae\Exceptions\InvoiceValidationException;

try {
    $invoice->export('invoice.xml');
} catch (InvoiceValidationException $e) {
    echo "Validation errors:\n";
    foreach ($e->getErrors() as $error) {
        echo "  - $error\n";
    }
}