import type { Metadata } from "next";

export const metadata: Metadata = {
  title: "Privacy Policy - MovieDice",
  description: "MovieDice privacy policy and data handling practices.",
};

export default function PrivacyPage() {
  return (
    <main className="mx-auto max-w-3xl px-4 py-12">
      <h1 className="text-3xl font-bold">Privacy Policy</h1>
      <p className="mt-2 text-sm text-foreground/50">Last updated: April 6, 2026</p>

      <div className="mt-8 space-y-8 text-foreground/80 leading-relaxed [&_h2]:text-xl [&_h2]:font-semibold [&_h2]:text-foreground [&_h3]:text-base [&_h3]:font-medium [&_h3]:text-foreground [&_ul]:list-disc [&_ul]:pl-5 [&_ul]:space-y-1">
        <section>
          <h2>1. Controller Identity</h2>
          <p className="mt-2">
            MovieDice is operated as a self-hosted application by its administrator (the
            &quot;Controller&quot;). The Controller is responsible for determining the purposes and
            means of processing personal data collected through this application. For data-related
            inquiries, contact the site administrator through the channels provided on this site.
          </p>
        </section>

        <section>
          <h2>2. Lawful Basis for Processing</h2>
          <p className="mt-2">We process personal data under the following lawful bases:</p>
          <ul className="mt-2">
            <li>
              <strong>Legitimate interest:</strong> Processing anonymous identifiers and group
              membership data to provide the core movie list and randomizer functionality.
            </li>
            <li>
              <strong>Consent:</strong> Where required by applicable law, your continued use of the
              service constitutes consent to the processing described in this policy.
            </li>
            <li>
              <strong>Legal obligation:</strong> We may process data to comply with applicable legal
              requirements.
            </li>
          </ul>
        </section>

        <section>
          <h2>3. Data Inventory and Retention</h2>
          <p className="mt-2">We collect and store the following data:</p>

          <h3 className="mt-4">Anonymous User Identifier (UUID)</h3>
          <p className="mt-1">
            A randomly generated unique identifier created via Supabase Anonymous Sign-In. This is
            not linked to any email, phone number, or real-world identity. Retained until 12 months
            of inactivity, after which the account and all associated data are automatically
            deleted.
          </p>

          <h3 className="mt-4">Display Name</h3>
          <p className="mt-1">
            A user-chosen name (up to 30 characters) used to identify contributions within a group.
            This is not verified and does not need to be a real name. Retained for the lifetime of
            the account.
          </p>

          <h3 className="mt-4">Group Membership</h3>
          <p className="mt-1">
            Records of which groups a user belongs to and their role (admin or member). Deleted when
            a user leaves a group or when the account is deleted.
          </p>

          <h3 className="mt-4">Movie Preferences</h3>
          <p className="mt-1">
            Movies added to group lists, including which user added them and watched status. The
            association with a specific user is set to null if the user&apos;s account is deleted
            (the movie remains on the list). Retained for the lifetime of the group.
          </p>

          <h3 className="mt-4">Recovery Code</h3>
          <p className="mt-1">
            A one-time-use 24-character code hashed with Argon2id before storage. The plaintext is
            shown once and never stored. The hash is deleted after successful use or account
            deletion.
          </p>

          <h3 className="mt-4">Server Logs</h3>
          <p className="mt-1">
            Standard HTTP server logs including IP addresses, user agent strings, request paths, and
            timestamps. These are used for security monitoring and debugging. Log rotation is
            configured with a maximum size of 10MB per file and a maximum of 5 files, resulting in
            automatic deletion as logs rotate.
          </p>
        </section>

        <section>
          <h2>4. Third-Party Recipients</h2>
          <ul className="mt-2">
            <li>
              <strong>TMDB (The Movie Database):</strong> We send API requests to TMDB to search for
              movies and retrieve movie metadata (posters, titles, genres). These requests are made
              server-side and do not include your user identifier. TMDB&apos;s privacy policy is
              available at{" "}
              <a
                href="https://www.themoviedb.org/privacy-policy"
                target="_blank"
                rel="noopener noreferrer"
                className="underline hover:text-foreground"
              >
                themoviedb.org/privacy-policy
              </a>
              .
            </li>
            <li>
              <strong>Sentry:</strong> We use Sentry for error monitoring. Error reports may include
              request metadata but never include user identifiers. UUID path segments are stripped
              before transmission. Sentry&apos;s privacy policy is available at{" "}
              <a
                href="https://sentry.io/privacy/"
                target="_blank"
                rel="noopener noreferrer"
                className="underline hover:text-foreground"
              >
                sentry.io/privacy
              </a>
              .
            </li>
          </ul>
        </section>

        <section>
          <h2>5. International Transfers</h2>
          <p className="mt-2">
            Error monitoring data sent to Sentry may be processed on servers located in the United
            States. Sentry participates in the EU-US Data Privacy Framework. All other data (user
            accounts, group data, movie lists) is stored on the self-hosted server and does not
            leave the hosting jurisdiction unless explicitly configured otherwise by the
            administrator.
          </p>
        </section>

        <section>
          <h2>6. Your Rights</h2>
          <p className="mt-2">
            Depending on your jurisdiction, you may have the following rights regarding your
            personal data:
          </p>
          <ul className="mt-2">
            <li>
              <strong>Right of access:</strong> Request a copy of the data we hold about you.
            </li>
            <li>
              <strong>Right to rectification:</strong> Update your display name at any time within
              the app.
            </li>
            <li>
              <strong>Right to erasure:</strong> Delete your account, which removes your user
              record, group memberships, and nullifies movie attribution.
            </li>
            <li>
              <strong>Right to restrict processing:</strong> Contact the administrator to request
              processing restrictions.
            </li>
            <li>
              <strong>Right to data portability:</strong> Contact the administrator to request your
              data in a machine-readable format.
            </li>
            <li>
              <strong>Right to object:</strong> Contact the administrator to object to processing
              based on legitimate interest.
            </li>
          </ul>
          <p className="mt-2">
            To exercise these rights, contact the site administrator. You may also have the right to
            lodge a complaint with your local data protection authority.
          </p>
        </section>

        <section>
          <h2>7. Children&apos;s Privacy</h2>
          <p className="mt-2">
            MovieDice is not intended for use by children under the age of 13. We do not knowingly
            collect personal data from children under 13. In the European Economic Area, the service
            is not intended for users under the age of 16 without parental consent, in accordance
            with the GDPR. If you believe a child has provided data through this service, please
            contact the administrator to request its deletion.
          </p>
        </section>

        <section>
          <h2>8. Cookies and Local Storage</h2>
          <p className="mt-2">MovieDice uses the following browser storage mechanisms:</p>
          <ul className="mt-2">
            <li>
              <strong>Authentication cookies:</strong> HttpOnly, Secure, SameSite=Strict cookies
              managed by Supabase for session authentication. These are essential for the service to
              function and cannot be disabled.
            </li>
            <li>
              <strong>Admin session cookies:</strong> Encrypted iron-session cookies for admin panel
              authentication (8-hour expiry).
            </li>
            <li>
              <strong>IndexedDB:</strong> Used for offline caching of movie list data via TanStack
              Query persistence. This data stays on your device and is not transmitted to any
              server.
            </li>
            <li>
              <strong>localStorage:</strong> May be used by Supabase client libraries for token
              management.
            </li>
          </ul>
          <p className="mt-2">
            We do not use any third-party tracking cookies or analytics cookies.
          </p>
        </section>

        <section>
          <h2>9. Changes to This Policy</h2>
          <p className="mt-2">
            We may update this privacy policy from time to time. Changes will be indicated by
            updating the &quot;Last updated&quot; date at the top of this page. For significant
            changes, we will display a notice within the application. Continued use of the service
            after changes constitutes acceptance of the updated policy.
          </p>
        </section>
      </div>
    </main>
  );
}