<?php
// Public-facing routes used by the form JS: submit a ticket, check
// ticket status. No auth — rate-limited + honeypot + issue-ID-email
// guard against abuse.

if (!defined('SUPPORT_RELAY_BOOTSTRAPPED')) { http_response_code(404); exit; }

if ($route === '/api/submit' && $method === 'POST') {
    if ($isSetup) supportRelayJson(['error' => 'relay not configured'], 503);
    if (supportRelayRateLimited($db, 'submit', 5, 60)) supportRelayJson(['error' => 'Too many requests. Try again in an hour.'], 429);

    $input = json_decode(file_get_contents('php://input'), true) ?: [];
    // Honeypot: a hidden field browsers won't fill but bots will. If it's
    // set, pretend success and drop the submission silently.
    if (!empty($input['website'])) supportRelayJson(['ok' => true, 'issue_id' => 'OUMTA-0']);

    $email = trim((string)($input['email'] ?? ''));
    $subject = trim((string)($input['subject'] ?? ''));
    $body = trim((string)($input['body'] ?? ''));
    $issueHint = trim((string)($input['issue_id'] ?? ''));

    if (!filter_var($email, FILTER_VALIDATE_EMAIL)) supportRelayJson(['error' => 'valid email required'], 400);
    if (mb_strlen($body) < 10)                      supportRelayJson(['error' => 'message too short'], 400);
    if (mb_strlen($body) > 10000)                   supportRelayJson(['error' => 'message too long (max 10k)'], 400);
    if (mb_strlen($subject) > 200)                  supportRelayJson(['error' => 'subject too long'], 400);

    // If the user claims to reply to an existing ticket, verify the email
    // matches before appending. Mismatch → treat it as a brand-new ticket
    // so we don't ghost-route hostile submissions to someone else's thread.
    $targetId = $issueHint !== '' ? supportRelayParseIssueId($db, $issueHint) : null;
    if ($targetId) {
        $t = $db->prepare('SELECT id, email, subject FROM tickets WHERE id = :id');
        $t->execute(['id' => $targetId]);
        $row = $t->fetch();
        if ($row && strtolower($row['email']) === strtolower($email)) {
            $db->prepare('INSERT INTO replies (ticket_id, direction, body) VALUES (:t, "in", :b)')
               ->execute(['t' => $targetId, 'b' => $body]);
            $db->prepare('UPDATE tickets SET status = "open", updated_at = datetime("now"), last_reply_at = datetime("now") WHERE id = :id')
               ->execute(['id' => $targetId]);
            supportRelayJson([
                'ok' => true,
                'issue_id' => supportRelayIssueId($db, $targetId),
                'appended' => true,
            ]);
        }
        // Wrong email → fall through to new-ticket path. Don't leak that
        // the id existed.
    }

    // New ticket
    $db->prepare('INSERT INTO tickets (email, subject, body, status) VALUES (:e, :s, :b, "open")')
       ->execute(['e' => strtolower($email), 's' => $subject, 'b' => $body]);
    $id = (int)$db->lastInsertId();
    $db->prepare('INSERT INTO replies (ticket_id, direction, body) VALUES (:t, "in", :b)')
       ->execute(['t' => $id, 'b' => $body]);
    $issueId = supportRelayIssueId($db, $id);

    // Confirmation mail — best-effort, swallow SMTP failures so the user
    // still gets their issue id even if the mail gateway is misbehaving.
    $smtp = supportRelaySmtpConfig($db, $MASTER_KEY);
    if ($smtp['host'] !== '' && $smtp['from'] !== '') {
        $brand = supportRelayGet($db, 'brand', 'Support');
        $body = "Hi,\n\nwe received your support request.\n\nIssue: " . $issueId
              . "\nSubject: " . ($subject ?: '(no subject)')
              . "\n\n" . supportRelayRenderFooter($db, $issueId);
        $client = new SmtpClient($smtp);
        $brandName = supportRelayGet($db, 'brand', 'Support');
        $client->send(
            $email, $smtp['from_name'], $smtp['from'], $body,
            ['Subject' => '[' . $issueId . '] ' . ($subject !== '' ? $subject : 'Support request received')],
            supportRelayMailOptions($body, $brandName)
        );
    }

    supportRelayJson(['ok' => true, 'issue_id' => $issueId]);
}

if (preg_match('#^/api/ticket/([A-Za-z0-9-]+)$#', $route, $m) && $method === 'GET') {
    if ($isSetup) supportRelayJson(['error' => 'relay not configured'], 503);
    $email = trim((string)($_GET['email'] ?? ''));
    if (!filter_var($email, FILTER_VALIDATE_EMAIL)) supportRelayJson(['error' => 'email required'], 400);
    $id = supportRelayParseIssueId($db, $m[1]);
    if (!$id) supportRelayJson(['error' => 'not found'], 404);
    $t = $db->prepare('SELECT id, email, subject, status, created_at, updated_at FROM tickets WHERE id = :id');
    $t->execute(['id' => $id]);
    $row = $t->fetch();
    if (!$row || strtolower($row['email']) !== strtolower($email)) supportRelayJson(['error' => 'not found'], 404);
    // Public status view: only the outbound replies (what we answered).
    // Internal notes / inbound replay stays hidden.
    $reps = $db->prepare('SELECT body, created_at FROM replies WHERE ticket_id = :id AND direction = "out" ORDER BY created_at ASC');
    $reps->execute(['id' => $id]);
    supportRelayJson([
        'issue_id' => supportRelayIssueId($db, $id),
        'subject' => $row['subject'],
        'status' => $row['status'],
        'created_at' => $row['created_at'],
        'updated_at' => $row['updated_at'],
        'replies' => $reps->fetchAll(),
    ]);
}