import { sqlWrapper } from "../../core/db.ts";

export async function rotateEventPin(
  eventId: string,
  userId: string,
  isGlobalAdmin: boolean,
): Promise<string | null> {
  const randPin = Math.floor(100000 + Math.random() * 900000).toString();
  const formattedPin = `${randPin.slice(0, 3)}-${randPin.slice(3)}`;

  const result = await sqlWrapper.sql`
        UPDATE event_passes
        SET pin_code = ${formattedPin}
        WHERE id = ${eventId}
          AND (created_by = ${userId} OR ${isGlobalAdmin})
          AND is_active = TRUE
        RETURNING pin_code
    `;

  if (!result || result.length === 0) return null;
  return result[0].pin_code;
}

export async function getEventAttendees(
  eventId: string,
  userId: string,
  isGlobalAdmin: boolean,
) {
  const event = await sqlWrapper.sql`
        SELECT slug FROM event_passes
        WHERE id = ${eventId}
          AND (created_by = ${userId} OR ${isGlobalAdmin})
    `;

  if (!event || event.length === 0) return null;

  const slug = event[0].slug;
  const guestPattern = `guest_${slug}_%`;

  const users = await sqlWrapper.sql`
        SELECT id, username, display_name, created_at
        FROM users
        WHERE username LIKE ${guestPattern}
        ORDER BY created_at DESC
    `;

  return users;
}

export async function getEventBySlugOrPin(code: string) {
  const rawNormalized = code.trim().toLowerCase();
  const pinNormalized = code.trim().replace(/[-\s]/g, "");

  const eventLookup = await sqlWrapper.sql`
      SELECT * FROM event_passes
      WHERE (LOWER(slug) = ${rawNormalized} OR REPLACE(pin_code, '-', '') = ${pinNormalized})
        AND is_active = TRUE
        AND (expires_at IS NULL OR expires_at > NOW())
    `;

  if (!eventLookup || eventLookup.length === 0) return null;
  return eventLookup[0];
}

export async function incrementEventSeats(eventId: string) {
  const updateResult = await sqlWrapper.sql`
      UPDATE event_passes
      SET seats_claimed = seats_claimed + 1
      WHERE id = ${eventId}
        AND (max_seats = 0 OR seats_claimed < max_seats)
      RETURNING *
    `;
  if (!updateResult || updateResult.length === 0) return null;
  return updateResult[0];
}

export async function createGuestUser(
  guestUuid: string,
  username: string,
  displayName: string,
  eventId: string,
) {
  await sqlWrapper.sql`
      INSERT INTO users (id, username, display_name, account_status, event_pass_id)
      VALUES (${guestUuid}, ${username}, ${displayName}, 'guest', ${eventId})
      ON CONFLICT DO NOTHING
    `;
}

export async function getAppById(appId: string) {
  const apps = await sqlWrapper
    .sql`SELECT name, domain FROM apps WHERE id = ${appId}`;
  if (apps.length > 0) return apps[0];
  return null;
}

export async function endEvent(
  eventId: string,
  userId: string,
  isGlobalAdmin: boolean,
) {
  const result = await sqlWrapper.sql`
      UPDATE event_passes
      SET is_active = FALSE
      WHERE id = ${eventId}
        AND (created_by = ${userId} OR ${isGlobalAdmin})
      RETURNING slug
    `;
  if (!result || result.length === 0) return null;
  return result[0].slug;
}

export async function createEventSession(
  sessionId: string,
  userId: string,
  label: string,
  customScopes: string[],
  expiresAt: Date,
) {
  await sqlWrapper.sql`
      INSERT INTO sessions (id, user_id, label, is_agent, custom_scopes, expires_at)
      VALUES (${sessionId}, ${userId}, ${label}, false, ${customScopes}, ${expiresAt})
    `;
}

export async function expandEventSeats(
  eventId: string,
  addSeats: number,
  userId: string,
  isGlobalAdmin: boolean,
) {
  const eventResult = await sqlWrapper.sql`
      UPDATE event_passes
      SET max_seats = max_seats + ${addSeats}
      WHERE id = ${eventId}
        AND (created_by = ${userId} OR ${isGlobalAdmin})
        AND is_active = TRUE
      RETURNING max_seats
    `;
  if (!eventResult || eventResult.length === 0) return null;
  return eventResult[0].max_seats;
}

export async function createEventPass(
  name: string,
  slug: string,
  pinCode: string,
  appId: string | null,
  role: string,
  maxSeats: number,
  lifespanHours: number,
  userId: string,
  expiresAt: Date,
) {
  const result = await sqlWrapper.sql`
      INSERT INTO event_passes (name, slug, pin_code, app_id, role, max_seats, lifespan_hours, created_by, expires_at)
      VALUES (${name}, ${slug}, ${pinCode}, ${appId || null}, ${role}, ${
    Number(maxSeats)
  }, ${Number(lifespanHours)}, ${userId}, ${expiresAt.toISOString()})
      RETURNING *
    `;
  if (!result || result.length === 0) return null;
  return result[0];
}

export async function getEventById(eventId: string) {
  const result = await sqlWrapper.sql`
      SELECT * FROM event_passes WHERE id = ${eventId}
    `;
  if (!result || result.length === 0) return null;
  return result[0];
}

export async function getEventBySlug(slug: string) {
  const result = await sqlWrapper.sql`
      SELECT * FROM event_passes WHERE slug = ${slug} AND is_active = TRUE
    `;
  if (!result || result.length === 0) return null;
  return result[0];
}

export async function getUserEventPasses(userId: string) {
  const result = await sqlWrapper.sql`
    SELECT ep.*, a.name as app_name, a.domain as app_domain
    FROM event_passes ep
    LEFT JOIN apps a ON ep.app_id = a.id
    WHERE ep.created_by = ${userId}
      AND ep.is_active = TRUE
    ORDER BY ep.created_at DESC
  `;
  return result;
}