import { query } from '../config/database.js';

export const syncUser = async (data: { externalId: string, email: string, name: string, organizationId?: string, clerkRole?: string }) => {
  const { externalId, email, name, organizationId, clerkRole } = data;

  let result = await query(
    `INSERT INTO gpi.users (clerk_id, email, name, role, updated_at) 
     VALUES ($1, $2, $3, 'guest', NOW())
     ON CONFLICT (clerk_id) DO UPDATE SET email = EXCLUDED.email, name = EXCLUDED.name, updated_at = NOW()
     RETURNING *`,
    [externalId, email, name]
  );
  
  let user = result.rows[0];

  if (organizationId) {
    let appRole = 'guest';
    if (clerkRole === 'org:admin') appRole = 'admin';
    else if (clerkRole === 'org:member') appRole = 'user';

    const orgResult = await query('SELECT id FROM gpi.organizations WHERE clerk_id = $1 OR logto_id = $1', [organizationId]);
    if (orgResult.rows.length > 0) {
      const orgUuid = orgResult.rows[0].id;
      
      await query(
        `INSERT INTO gpi.user_organizations (user_id, organization_id, role, updated_at)
         VALUES ($1, $2, $3, NOW())
         ON CONFLICT (user_id, organization_id) DO NOTHING`,
        [user.id, orgUuid, appRole]
      );

      const memberResult = await query(
        'SELECT role, is_banned FROM gpi.user_organizations WHERE user_id = $1 AND organization_id = $2',
        [user.id, orgUuid]
      );
      
      return {
        ...user,
        organizationRole: memberResult.rows[0].role,
        organizationBanned: memberResult.rows[0].is_banned
      };
    }
  }

  return user;
};

export const getCurrentUser = async (externalId: string, organizationId?: string) => {
  const userResult = await query('SELECT * FROM gpi.users WHERE clerk_id = $1 OR logto_id = $1', [externalId]);
  if (userResult.rows.length === 0) return null;
  const user = userResult.rows[0];

  if (organizationId) {
    const orgResult = await query('SELECT id FROM gpi.organizations WHERE clerk_id = $1 OR logto_id = $1', [organizationId]);
    if (orgResult.rows.length > 0) {
      const orgUuid = orgResult.rows[0].id;
      const memberResult = await query(
        'SELECT role, is_banned FROM gpi.user_organizations WHERE user_id = $1 AND organization_id = $2',
        [user.id, orgUuid]
      );
      if (memberResult.rows.length > 0) {
        return {
          ...user,
          role: memberResult.rows[0].role,
          isBanned: memberResult.rows[0].is_banned,
          organizationId
        };
      }
    }
  }
  return user;
};

export const getAllUsersInOrg = async (organizationId: string) => {
  const orgResult = await query('SELECT id FROM gpi.organizations WHERE clerk_id = $1 OR logto_id = $1', [organizationId]);
  if (orgResult.rows.length === 0) return [];
  const orgUuid = orgResult.rows[0].id;

  const results = await query(
    `SELECT u.*, uo.role as organization_role, uo.is_banned as organization_banned, uo.id as member_id
     FROM gpi.users u
     JOIN gpi.user_organizations uo ON u.id = uo.user_id
     WHERE uo.organization_id = $1
     ORDER BY uo.created_at DESC`,
    [orgUuid]
  );
  return results.rows;
};

export const updateUserRole = async (userIdOrMemberId: string, organizationId: string, role: string) => {
  const orgResult = await query('SELECT id FROM gpi.organizations WHERE clerk_id = $1 OR logto_id = $1', [organizationId]);
  if (orgResult.rows.length === 0) return null;
  const orgUuid = orgResult.rows[0].id;

  // Try update by member_id or user_id
  const result = await query(
    'UPDATE gpi.user_organizations SET role = $1, updated_at = NOW() WHERE (id = $2 OR user_id = $2) AND organization_id = $3 RETURNING *',
    [role, userIdOrMemberId, orgUuid]
  );
  return result.rows[0];
};

export const toggleBanUser = async (userIdOrMemberId: string, organizationId: string, isBanned: boolean) => {
  const orgResult = await query('SELECT id FROM gpi.organizations WHERE clerk_id = $1 OR logto_id = $1', [organizationId]);
  if (orgResult.rows.length === 0) return null;
  const orgUuid = orgResult.rows[0].id;

  const result = await query(
    'UPDATE gpi.user_organizations SET is_banned = $1, updated_at = NOW() WHERE (id = $2 OR user_id = $2) AND organization_id = $3 RETURNING *',
    [isBanned, userIdOrMemberId, orgUuid]
  );
  return result.rows[0];
};

export const heartbeat = async (userId: string) => {
  await query('UPDATE gpi.users SET last_seen_at = NOW() WHERE id = $1', [userId]);
};

export const getActiveUsers = async (organizationId: string, excludeUserId?: string) => {
  const orgResult = await query('SELECT id FROM gpi.organizations WHERE clerk_id = $1 OR logto_id = $1', [organizationId]);
  if (orgResult.rows.length === 0) return [];
  const orgUuid = orgResult.rows[0].id;

  const twoMinutesAgo = new Date(Date.now() - 2 * 60 * 1000);
  const result = await query(
    `SELECT u.id, u.name, u.email, u.last_seen_at, u.clerk_id as "externalId"
     FROM gpi.users u
     JOIN gpi.user_organizations uo ON u.id = uo.user_id
     WHERE uo.organization_id = $1 AND u.last_seen_at >= $2 AND u.id != $3`,
    [orgUuid, twoMinutesAgo, excludeUserId || '00000000-0000-0000-0000-000000000000']
  );
  return result.rows;
};

export const deleteUserFromOrg = async (userIdOrMemberId: string, organizationId: string) => {
  const orgResult = await query('SELECT id FROM gpi.organizations WHERE clerk_id = $1 OR logto_id = $1', [organizationId]);
  if (orgResult.rows.length === 0) return false;
  const orgUuid = orgResult.rows[0].id;

  const result = await query(
    'DELETE FROM gpi.user_organizations WHERE (id = $1 OR user_id = $1) AND organization_id = $2',
    [userIdOrMemberId, orgUuid]
  );
  return result.rowCount > 0;
};