<?php
declare(strict_types=1);

require_once __DIR__ . '/../app/Domain/Reporting/CsvExporter.php';

function csv_exporter_assert_same(mixed $expected, mixed $actual, string $message): void
{
    if ($expected !== $actual) {
        throw new RuntimeException($message . "\nExpected: " . var_export($expected, true) . "\nActual: " . var_export($actual, true));
    }
}

$exporter = new CsvExporter();
csv_exporter_assert_same(
    "Name,Notes,Amount\r\nAlice,\"Comma, quote \"\"inside\"\"\",12.5\r\n\"Bob\r\nJones\",plain,\r\n",
    $exporter->export(
        ['Name', 'Notes', 'Amount'],
        [
            ['Alice', 'Comma, quote "inside"', 12.5],
            ["Bob\r\nJones", 'plain', null],
        ],
    ),
    'CSV fields must follow RFC 4180 quoting and deterministic CRLF records.'
);

$withoutBom = $exporter->export(['Name'], [['Alice']]);
$withBom = $exporter->export(['Name'], [['Alice']], true);
csv_exporter_assert_same("Name\r\nAlice\r\n", $withoutBom, 'CSV must not include a BOM by default.');
csv_exporter_assert_same("\xEF\xBB\xBFName\r\nAlice\r\n", $withBom, 'CSV must include a UTF-8 BOM only when requested.');
csv_exporter_assert_same("Name\r\n'=SUM(A1:A2)\r\n", $exporter->export(['Name'], [['=SUM(A1:A2)']]), 'CSV must neutralize spreadsheet formulas.');

$mismatchRaised = false;
try {
    $exporter->export(['Name', 'Amount'], [['Alice']]);
} catch (InvalidArgumentException $exception) {
    $mismatchRaised = str_contains($exception->getMessage(), 'row 1')
        && str_contains($exception->getMessage(), '2 headers')
        && str_contains($exception->getMessage(), '1 fields');
}
if (!$mismatchRaised) {
    throw new RuntimeException('Mismatched row lengths must be rejected with a useful error.');
}

printf("CSV exporter tests: 4 passed\n");