<?php

declare(strict_types=1);

/**
 * Basis-Testklasse für Steuerkram-Tests.
 *
 * Jeder Test läuft in einer MySQL-Transaktion, die am Ende zurückgerollt wird.
 * Damit bleibt die Datenbank nach dem Test unverändert.
 */
abstract class TestCase
{
    private static int $totalPassed = 0;
    private static int $totalFailed = 0;
    private static array $allFailures = [];

    protected int $passed = 0;
    protected int $failed = 0;
    protected array $failures = [];
    protected string $testName = '';

    abstract public function run(): void;

    protected function setUp(): void
    {
        \Steuerkram\Database::beginTransaction();
    }

    protected function tearDown(): void
    {
        try {
            \Steuerkram\Database::rollBack();
        } catch (\Throwable) {
            // Transaktion war evtl. nicht aktiv
        }
    }

    protected function assert(bool $condition, string $message): void
    {
        if ($condition) {
            $this->passed++;
            echo "    \e[32m✓\e[0m {$message}\n";
        } else {
            $this->failed++;
            $this->failures[] = "[{$this->testName}] {$message}";
            echo "    \e[31m✗\e[0m {$message}\n";
        }
    }

    protected function assertEquals(mixed $expected, mixed $actual, string $message): void
    {
        $this->assert(
            $expected == $actual,
            "{$message} (erwartet: " . json_encode($expected) . ", erhalten: " . json_encode($actual) . ")"
        );
    }

    protected function assertGreaterThan(int $min, mixed $actual, string $message): void
    {
        $this->assert($actual > $min, "{$message} (Wert: {$actual}, muss > {$min})");
    }

    protected function assertNotEmpty(mixed $value, string $message): void
    {
        $this->assert(!empty($value), $message);
    }

    /**
     * Liefert Konto-ID anhand der Kontonummer oder null wenn nicht gefunden.
     */
    protected function findAccountId(string $kontonummer): ?int
    {
        $row = \Steuerkram\Database::fetchOne(
            'SELECT id FROM accounts WHERE kontonummer = ?',
            [$kontonummer]
        );
        return $row ? (int)$row['id'] : null;
    }

    public function execute(): array
    {
        echo "\n\e[1m{$this->testName}\e[0m\n";
        $this->setUp();
        try {
            $this->run();
        } catch (\Throwable $e) {
            $this->failed++;
            $msg = "[{$this->testName}] Ausnahme: " . $e->getMessage() . ' in ' . $e->getFile() . ':' . $e->getLine();
            $this->failures[] = $msg;
            echo "    \e[31m✗\e[0m Unerwartete Ausnahme: " . $e->getMessage() . "\n";
        } finally {
            $this->tearDown();
        }

        $status = $this->failed === 0
            ? "\e[32mBestanden ({$this->passed}/{$this->passed})\e[0m"
            : "\e[31m{$this->failed} Fehler, {$this->passed} OK\e[0m";
        echo "  → {$status}\n";

        self::$totalPassed += $this->passed;
        self::$totalFailed += $this->failed;
        self::$allFailures  = array_merge(self::$allFailures, $this->failures);

        return $this->failures;
    }

    public static function globalSummary(): array
    {
        return [
            'passed'   => self::$totalPassed,
            'failed'   => self::$totalFailed,
            'failures' => self::$allFailures,
        ];
    }
}