<?php

declare(strict_types=1);

require __DIR__ . '/dev-db.php';

$baseUrl = rtrim((string)(getenv('SMOKE_BASE_URL') ?: 'http://127.0.0.1:8080'), '/');
$issuePattern = '~(?:Deprecated|Warning|Fatal error|Parse error|Notice|Uncaught (?:Error|Exception))~i';

// Der Smoke-Test legt sich seinen eigenen Mandanten mit bekannten Zahlen an und
// meldet sich per HTTP an, statt sich auf vorhandene Daten oder eine
// Auto-Anmeldung zu verlassen. Nur so lassen sich angemeldete Seiten UND der
// Login-Schutz in einem Lauf pruefen.
$pdo = dev_pdo();
$suffix = bin2hex(random_bytes(4));
$smokeSlug = "smoke-{$suffix}";
$smokeEmail = "smoke-owner-{$suffix}@test.local";
$smokePassword = 'HttpSmokeTest123!';
$smokeTenantId = null;

// Erwartete Betraege der Testdaten (siehe smoke_seed()).
$erwartetGuthaben = '15,00 €';
$erwartetSchulden = '-4,00 €';

$checks = [
    [
        'label' => 'Landingpage',
        'path' => 'landing.php',
        'contains' => ['Kaffeeliste', 'Kundenkonto anlegen'],
    ],
    [
        'label' => 'Impressum',
        'path' => 'impressum.php',
        'contains' => ['Impressum', 'In den Sieben Stücken 9d', '30655 Hannover'],
    ],
    [
        'label' => 'AGB',
        'path' => 'agb.php',
        'contains' => ['Allgemeine Geschäftsbedingungen', 'Entwurf'],
    ],
    [
        'label' => 'Preise',
        'path' => 'preise.php',
        'contains' => ['Preise', '3,99', '7,99', '12,99', '§ 19 UStG'],
    ],
    [
        'label' => 'Datenschutzerklärung',
        'path' => 'datenschutz.php',
        'contains' => ['Datenschutzerklärung', 'Verantwortlicher', 'Auftragsverarbeiter'],
    ],
    [
        'label' => 'Dashboard',
        'path' => 'index.php',
        'auth' => true,
        'contains' => ['Aktueller Stand', 'Jahresübersicht', 'Letzte Einzahlungen'],
    ],
    [
        'label' => 'Striche erfassen',
        'path' => 'stricheintragen.php',
        'auth' => true,
        'contains' => ['Anzahl der Striche'],
    ],
    [
        'label' => 'Einzahlungen erfassen',
        'path' => 'einzahlung.php',
        'auth' => true,
        'contains' => ['Einzahlungen', 'Bemerkung'],
    ],
    [
        'label' => 'Kaffeeliste',
        'path' => 'kaffeeliste.php',
        'auth' => true,
        'contains' => [
            'Aktive Mitarbeiter',
            'teilnehmerauswertung.php?participant_id=',
            'Smoke Guthaben',
            $erwartetGuthaben,
            'Smoke Schulden',
            $erwartetSchulden,
            'Smoke Ohne Buchungen',
            '0,00 €',
        ],
        'not_contains' => ['Smoke Inaktiv'],
    ],
    [
        'label' => 'Ledger Preview',
        'path' => 'ledger-preview.php',
        'auth' => true,
        'contains' => ['Journal-Vorschau', 'Tenant-Summen', 'Letzte Ledger-Buchungen'],
    ],
    [
        'label' => 'Mitgliederverwaltung',
        'path' => 'mitarbeiterverwalten.php',
        'auth' => true,
        'contains' => ['Mitglieder verwalten', 'PayPal-Name'],
    ],
    [
        'label' => 'Letzte Einträge',
        'path' => 'letzteneintraege.php',
        'auth' => true,
        'contains' => ['Letzte 100 Einzahlungen', 'Stornieren'],
    ],
    [
        'label' => 'CSV-Upload',
        'path' => 'csvupload.php',
        'auth' => true,
        'contains' => ['CSV-Import'],
    ],
    [
        'label' => 'Hinweise',
        'path' => 'hinweise.php',
        'auth' => true,
        'contains' => ['Kaffeeliste - Hinweise'],
    ],
    [
        'label' => 'FAQ',
        'path' => 'faq.php',
        'auth' => true,
        'contains' => ['FAQ - Kaffeeliste'],
    ],
    [
        'label' => 'Login',
        'path' => 'login.php',
        'contains' => ['Login', 'Registrieren', 'Passwort vergessen'],
    ],
    [
        'label' => 'Registrierung',
        'path' => 'register.php',
        'contains' => ['Registrierung', 'Kundenkonto anlegen'],
    ],
    [
        'label' => 'Passwort vergessen',
        'path' => 'passwort-vergessen.php',
        'contains' => ['Passwort vergessen', 'Link vorbereiten'],
    ],
    [
        'label' => 'Mandantenauswahl Login-Schutz',
        'path' => 'mandant-auswahl.php',
        'expect_redirect' => 'login.php',
        'contains' => [],
    ],
    [
        'label' => 'Passwort zurücksetzen Invalid',
        'path' => 'passwort-zuruecksetzen.php',
        'contains' => ['Passwort zurücksetzen', 'ungültig oder abgelaufen'],
    ],
    [
        'label' => 'E-Mail verifizieren Invalid',
        'path' => 'email-verifizieren.php',
        'contains' => ['E-Mail verifizieren', 'ungültig oder abgelaufen'],
    ],
    [
        'label' => 'Mandant-Einstellungen Login-Schutz',
        'path' => 'mandant-einstellungen.php',
        'expect_redirect' => 'login.php',
        'contains' => [],
    ],
    [
        'label' => 'Namensanpassung',
        'path' => 'namenanpassen.php',
        'auth' => true,
        'contains' => ['Anzeigenamen aktualisieren'],
    ],
    [
        'label' => 'Datenexport Login-Schutz',
        'path' => 'datenexport.php',
        'expect_redirect' => 'login.php',
        'contains' => [],
    ],
    [
        'label' => 'Abo-Upgrade GET-Redirect',
        'path' => 'abo-upgrade.php',
        'expect_redirect' => 'login.php',
        'contains' => [],
    ],
    [
        'label' => 'Abo-Portal GET-Redirect',
        'path' => 'abo-portal.php',
        'expect_redirect' => 'login.php',
        'contains' => [],
    ],
    [
        'label' => 'Mandant löschen Login-Schutz',
        'path' => 'mandant-loeschen.php',
        'expect_redirect' => 'login.php',
        'contains' => [],
    ],
    [
        'label' => 'Back-Office Login-Schutz',
        'path' => 'backoffice.php',
        'expect_redirect' => 'login.php',
        'contains' => [],
    ],
    [
        'label' => 'Back-Office Mandantendetail Login-Schutz',
        'path' => 'backoffice-mandant.php?tenant_id=1',
        'expect_redirect' => 'login.php',
        'contains' => [],
    ],
    [
        'label' => 'Teilnehmerauswertung',
        'path' => 'PLATZHALTER_TEILNEHMER',
        'auth' => true,
        'contains' => ['Auswertung', 'Smoke Guthaben', 'Jahresübersicht', 'Letzte Einzahlungen'],
    ],
    [
        'label' => 'PDF-Export',
        'path' => 'exportKaffeeliste.php',
        'auth' => true,
        'contains' => ['%PDF'],
    ],
    [
        'label' => 'Mailversand',
        'path' => 'mailversenden.php',
        'auth' => true,
        'contains' => ['Info-Mail versenden', 'Dry-Run', 'Versandlog'],
    ],
    [
        'label' => 'Jahresabschluss',
        'path' => 'jahresauswertung.php',
        'auth' => true,
        'contains' => ['Jahresabschluss', 'Dry-Run', 'Jahresstriche gesamt'],
    ],
];

$knownIssueChecks = [
];

$skippedUnsafe = [
];

/**
 * HTTP-Request mit optionalem Cookie-Jar. $cookies wird per Referenz
 * aktualisiert, damit die Session ueber mehrere Requests erhalten bleibt.
 *
 * @param array<string,string>|null $cookies null = bewusst ohne Session
 */
function smoke_fetch(string $url, ?array &$cookies = null, string $method = 'GET', ?string $postBody = null): array
{
    $header = "User-Agent: KaffeelisteHttpSmoke/1.0\r\n";
    if ($cookies !== null && $cookies !== []) {
        $pairs = [];
        foreach ($cookies as $name => $value) {
            $pairs[] = "{$name}={$value}";
        }
        $header .= 'Cookie: ' . implode('; ', $pairs) . "\r\n";
    }
    if ($postBody !== null) {
        $header .= "Content-Type: application/x-www-form-urlencoded\r\n";
    }

    $context = stream_context_create([
        'http' => [
            'method' => $method,
            'timeout' => 15,
            'ignore_errors' => true,
            'follow_location' => 0,
            'header' => $header,
            'content' => $postBody ?? '',
        ],
    ]);

    $body = @file_get_contents($url, false, $context);
    $headers = $http_response_header ?? [];
    $status = 0;
    $location = null;

    foreach ($headers as $h) {
        if (preg_match('~^HTTP/\S+\s+(\d{3})~', $h, $matches) === 1) {
            $status = (int)$matches[1];
        }
        if (preg_match('/^Location:\s*(.+)$/i', $h, $m) === 1) {
            $location = trim($m[1]);
        }
        if ($cookies !== null && preg_match('/^Set-Cookie:\s*([^=;]+)=([^;]+)/i', $h, $m) === 1) {
            $cookies[$m[1]] = $m[2];
        }
    }

    if ($body === false) {
        $error = error_get_last();
        return [
            'status' => $status,
            'body' => '',
            'location' => $location,
            'error' => $error['message'] ?? 'Unknown HTTP error',
        ];
    }

    return [
        'status' => $status,
        'body' => $body,
        'location' => $location,
        'error' => null,
    ];
}

/**
 * Legt einen eigenen Mandanten mit bekannten Zahlen an:
 * - "Smoke Guthaben"        +20,00 € Einzahlung, 25 Striche a 0,20 € = 15,00 €
 * - "Smoke Schulden"        keine Einzahlung, 20 Striche a 0,20 €   = -4,00 €
 * - "Smoke Ohne Buchungen"  nichts                                  =  0,00 €
 * - "Smoke Inaktiv"         inaktiv, darf in der Kaffeeliste fehlen
 *
 * @return array{tenant_id:int, participant_id:int}
 */
function smoke_seed(PDO $pdo, string $slug, string $email, string $password, string $suffix): array
{
    $pdo->prepare('INSERT INTO tenants (slug, name, status) VALUES (?, ?, ?)')
        ->execute([$slug, 'HTTP-Smoke Mandant', 'active']);
    $tenantId = (int)$pdo->lastInsertId();
    $pdo->prepare('INSERT INTO tenant_settings (tenant_id) VALUES (?)')->execute([$tenantId]);

    $pdo->prepare('INSERT INTO users (email, email_norm, display_name, password_hash, status) VALUES (?, ?, ?, ?, ?)')
        ->execute([$email, $email, 'Smoke Owner', password_hash($password, PASSWORD_DEFAULT), 'active']);
    $userId = (int)$pdo->lastInsertId();
    $pdo->prepare('INSERT INTO tenant_memberships (tenant_id, user_id, role, status, joined_at) VALUES (?, ?, ?, ?, NOW())')
        ->execute([$tenantId, $userId, 'owner', 'active']);

    $insertParticipant = $pdo->prepare(
        'INSERT INTO participants (tenant_id, user_id, display_name, email, email_norm, active) VALUES (?, ?, ?, ?, ?, ?)'
    );
    $ids = [];
    foreach ([['Smoke Guthaben', $userId, 1], ['Smoke Schulden', null, 1], ['Smoke Ohne Buchungen', null, 1], ['Smoke Inaktiv', null, 0]] as [$name, $uid, $active]) {
        $mail = strtolower(str_replace(' ', '-', $name)) . "-{$suffix}@test.local";
        $insertParticipant->execute([$tenantId, $uid, $name, $mail, $mail, $active]);
        $ids[$name] = (int)$pdo->lastInsertId();
    }

    $payment = $pdo->prepare(
        "INSERT INTO ledger_entries (tenant_id, participant_id, type, amount_cents, booked_at, source) VALUES (?, ?, 'payment', ?, NOW(), 'manual_bulk')"
    );
    $consumption = $pdo->prepare(
        "INSERT INTO ledger_entries (tenant_id, participant_id, type, amount_cents, marks_count, unit_price_cents, booked_at, source) VALUES (?, ?, 'consumption', ?, ?, 20, NOW(), 'manual_bulk')"
    );
    $payment->execute([$tenantId, $ids['Smoke Guthaben'], 2000]);
    $consumption->execute([$tenantId, $ids['Smoke Guthaben'], -500, 25]);
    $consumption->execute([$tenantId, $ids['Smoke Schulden'], -400, 20]);

    return ['tenant_id' => $tenantId, 'participant_id' => $ids['Smoke Guthaben']];
}

function smoke_cleanup(PDO $pdo, ?int $tenantId, string $email): void
{
    if ($tenantId === null) {
        return;
    }
    $pdo->prepare('DELETE FROM ledger_entries WHERE tenant_id = ?')->execute([$tenantId]);
    $pdo->prepare('DELETE FROM participants WHERE tenant_id = ?')->execute([$tenantId]);
    $pdo->prepare('DELETE FROM tenant_memberships WHERE tenant_id = ?')->execute([$tenantId]);
    $pdo->prepare('DELETE FROM tenant_settings WHERE tenant_id = ?')->execute([$tenantId]);
    $pdo->prepare('DELETE FROM tenants WHERE id = ?')->execute([$tenantId]);
    $pdo->prepare('DELETE FROM users WHERE email_norm = ?')->execute([strtolower($email)]);
}

function smoke_url(string $baseUrl, string $path): string
{
    return $baseUrl . '/' . ltrim($path, '/');
}

$failures = [];
$passes = 0;

echo "HTTP smoke base URL: {$baseUrl}\n";

// Testmandant anlegen und per HTTP anmelden.
try {
    $seeded = smoke_seed($pdo, $smokeSlug, $smokeEmail, $smokePassword, $suffix);
    $smokeTenantId = $seeded['tenant_id'];
} catch (Throwable $e) {
    fwrite(STDERR, "HTTP smoke setup failed: {$e->getMessage()}\n");
    exit(1);
}

// Pfad der Teilnehmerauswertung steht erst nach dem Seeden fest.
foreach ($checks as $i => $check) {
    if ($check['path'] === 'PLATZHALTER_TEILNEHMER') {
        $checks[$i]['path'] = 'teilnehmerauswertung.php?participant_id=' . $seeded['participant_id'];
    }
}

$authCookies = [];
$loginPage = smoke_fetch(smoke_url($baseUrl, 'login.php'), $authCookies);
preg_match('/name="csrf_token" value="([^"]+)"/', $loginPage['body'], $csrfMatch);
smoke_fetch(smoke_url($baseUrl, 'login.php'), $authCookies, 'POST', http_build_query([
    'csrf_token' => $csrfMatch[1] ?? '',
    'email' => $smokeEmail,
    'password' => $smokePassword,
    'tenant_slug' => $smokeSlug,
]));

if (empty($authCookies)) {
    smoke_cleanup($pdo, $smokeTenantId, $smokeEmail);
    fwrite(STDERR, "HTTP smoke: Anmeldung fehlgeschlagen (keine Session).\n");
    exit(1);
}

foreach ($checks as $check) {
    $url = smoke_url($baseUrl, $check['path']);
    // Angemeldete Seiten mit Session, alles andere bewusst ohne - nur so
    // laesst sich der Login-Schutz ueberhaupt pruefen.
    $needsAuth = !empty($check['auth']);
    $jar = $needsAuth ? $authCookies : null;
    $response = smoke_fetch($url, $jar);
    $label = $check['label'] . ' (' . $check['path'] . ')';

    if ($response['error'] !== null) {
        $failures[] = "{$label}: {$response['error']}";
        echo "FAIL {$label}\n";
        continue;
    }

    // Geschuetzte Seiten muessen ohne Session auf den Login umleiten. Das
    // explizit zu pruefen ist belastbarer, als der Umleitung zu folgen und im
    // Ergebnis nach dem Wort "Login" zu suchen.
    if (isset($check['expect_redirect'])) {
        $ziel = (string)$response['location'];
        if ($response['status'] !== 302 || !str_contains($ziel, $check['expect_redirect'])) {
            $failures[] = "{$label}: erwartete Umleitung auf {$check['expect_redirect']}, kam HTTP {$response['status']} nach '{$ziel}'";
            echo "FAIL {$label}\n";
            continue;
        }
        $passes++;
        echo "PASS {$label}\n";
        continue;
    }

    if ($response['status'] !== 200) {
        $failures[] = "{$label}: expected HTTP 200, got HTTP {$response['status']}";
        echo "FAIL {$label}\n";
        continue;
    }

    if (preg_match($issuePattern, $response['body'], $matches) === 1) {
        $failures[] = "{$label}: PHP issue marker found ({$matches[0]})";
        echo "FAIL {$label}\n";
        continue;
    }

    foreach ($check['contains'] as $needle) {
        if (!str_contains($response['body'], $needle)) {
            $failures[] = "{$label}: expected text not found: {$needle}";
            echo "FAIL {$label}\n";
            continue 2;
        }
    }

    foreach (($check['not_contains'] ?? []) as $needle) {
        if (str_contains($response['body'], $needle)) {
            $failures[] = "{$label}: unexpected text found: {$needle}";
            echo "FAIL {$label}\n";
            continue 2;
        }
    }

    $passes++;
    echo "PASS {$label}\n";
}

foreach ($knownIssueChecks as $check) {
    $url = smoke_url($baseUrl, $check['path']);
    $response = smoke_fetch($url);
    $label = $check['label'] . ' (' . $check['path'] . ')';

    if ($response['error'] !== null) {
        echo "KNOWN {$label}: {$check['reason']} ({$response['error']})\n";
        continue;
    }

    if (preg_match($check['expected_issue'], $response['body']) === 1) {
        echo "KNOWN {$label}: {$check['reason']}\n";
        continue;
    }

    if ($response['status'] === 200 && preg_match($issuePattern, $response['body']) !== 1) {
        echo "RESOLVED {$label}: bitte in die regulären Smoke-Checks aufnehmen.\n";
        continue;
    }

    $failures[] = "{$label}: unexpected response while checking known issue";
    echo "FAIL {$label}\n";
}

foreach ($skippedUnsafe as $skip) {
    echo "SKIP {$skip['path']}: {$skip['reason']}\n";
}

smoke_cleanup($pdo, $smokeTenantId, $smokeEmail);

if ($failures !== []) {
    echo "\nHTTP smoke failed with " . count($failures) . " failure(s):\n";
    foreach ($failures as $failure) {
        echo "- {$failure}\n";
    }
    exit(1);
}

echo "\nHTTP smoke passed with {$passes} checked pages.\n";