import { prisma } from '@/lib/db';
import { GHL } from './index';
import { decrypt } from '@/lib/settings/encryption';
import { settingsService } from '@/lib/settings/settings-service';

/**
 * Get GHL client for a specific user.
 * First checks user's own credentials, then falls back to global system settings.
 */
export async function getGHLClientForUser(userId: string): Promise<GHL | null> {
  // First, try to get user-specific GHL credentials
  const user = await prisma.user.findUnique({
    where: { id: userId },
    select: { ghlLocationId: true, ghlAccessToken: true },
  });

  if (user?.ghlLocationId && user?.ghlAccessToken) {
    return new GHL({
      accessToken: decrypt(user.ghlAccessToken),
      locationId: user.ghlLocationId,
    });
  }

  // Fall back to global system settings (for single-tenant or testing)
  return getGHLClientFromSettings();
}

/**
 * Get GHL client using global system settings.
 * Useful for admin operations or single-tenant deployments.
 */
export async function getGHLClientFromSettings(): Promise<GHL | null> {
  const accessToken = await settingsService.get('ghlAccessToken');
  const locationId = await settingsService.get('ghlLocationId');

  if (!accessToken || !locationId) {
    return null;
  }

  return new GHL({
    accessToken,
    locationId,
  });
}