<?php

require_once __DIR__ . '/functions.php';

$pdo = app_db_pdo();
$errors = [];
$email = trim((string)($_POST['email'] ?? ''));
$tenantSlug = trim((string)($_POST['tenant_slug'] ?? ''));

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    app_require_csrf();

    $result = saas_authenticate(
        $pdo,
        $email,
        (string)($_POST['password'] ?? ''),
        $tenantSlug
    );

    if ($result['ok'] && !empty($result['needs_tenant_selection'])) {
        saas_start_pending_tenant_selection((int)$result['user_id']);
        header('Location: mandant-auswahl.php');
        exit;
    }

    if ($result['ok']) {
        saas_session_login($result['identity']);
        header('Location: konto.php');
        exit;
    }

    $errors = $result['errors'];
}

?>

<!DOCTYPE HTML>
<html lang="de">
    <head>
        <title>Kaffeeliste Login</title>
        <meta charset="utf-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no" />
        <link rel="stylesheet" href="assets/css/main.css" />
        <link rel="stylesheet" href="assets/css/public.css" />
    </head>
    <body class="is-preload public-page">
        <div class="public-shell">
            <section class="public-auth">
                <nav class="public-nav" aria-label="Hauptnavigation">
                    <strong><a href="landing.php">Kaffeeliste</a></strong>
                    <ul class="actions">
                        <li><a href="register.php" class="button">Registrieren</a></li>
                    </ul>
                </nav>

                <div class="public-auth-grid">
                    <div class="public-auth-copy">
                        <h1>Login</h1>
                        <p>Melde dich mit deinem Kundenkonto an. Wenn du mehreren Mandanten zugeordnet bist, wählst du danach den passenden Bereich aus.</p>
                    </div>

                    <div class="public-panel">
                        <h2>Zur App</h2>

                        <?php if (isset($_GET['logged_out'])): ?>
                            <div class="hint-box success"><p>Du wurdest abgemeldet.</p></div>
                        <?php endif; ?>

                        <?php if ($errors !== []): ?>
                            <div class="hint-box error">
                                <?php foreach ($errors as $error): ?>
                                    <p><?php echo saas_html($error); ?></p>
                                <?php endforeach; ?>
                            </div>
                        <?php endif; ?>

                        <form method="post" action="login.php">
                            <?php echo app_csrf_field(); ?>
                            <div class="row">
                                <div class="col-12">
                                    <label for="email">E-Mail</label>
                                    <input type="email" name="email" id="email" value="<?php echo saas_html($email); ?>" required>
                                </div>
                                <div class="col-12">
                                    <label for="password">Passwort</label>
                                    <input type="password" name="password" id="password" required>
                                </div>
                                <div class="col-12">
                                    <label for="tenant_slug">Kundenkürzel</label>
                                    <input type="text" name="tenant_slug" id="tenant_slug" value="<?php echo saas_html($tenantSlug); ?>" placeholder="optional">
                                </div>
                            </div>
                            <ul class="actions">
                                <li><button type="submit" class="primary">Einloggen</button></li>
                                <li><a href="passwort-vergessen.php" class="button">Passwort vergessen</a></li>
                            </ul>
                        </form>
                    </div>
                </div>
            </section>
        </div>

        <script src="assets/js/jquery.min.js"></script>
        <script src="assets/js/browser.min.js"></script>
        <script src="assets/js/breakpoints.min.js"></script>
        <script src="assets/js/util.js"></script>
        <script src="assets/js/main.js"></script>
    </body>
</html>
