import { beforeAll, describe, expect, test, vi } from 'vitest';

process.env.DATABASE_URL ??= 'postgresql://user:pass@localhost:5432/umami?schema=public';
delete process.env.DATABASE_REPLICA_URL;

vi.mock('@prisma/adapter-pg', () => ({
  PrismaPg: class PrismaPg {},
}));

vi.mock('@prisma/extension-read-replicas', () => ({
  readReplicas: () => () => ({}),
}));

vi.mock('@/generated/prisma/client', () => ({
  PrismaClient: class PrismaClient {
    $executeRawUnsafe = vi.fn();
    $queryRawUnsafe = vi.fn();
    $transaction = vi.fn();
    $on = vi.fn();
    $extends() {
      return this;
    }
  },
}));

let getRawQueryClient!: typeof import('./prisma').getRawQueryClient;
let prisma!: typeof import('./prisma').default;

beforeAll(async () => {
  ({ getRawQueryClient, default: prisma } = await import('./prisma'));
});

interface RawQueryClient {
  $executeRawUnsafe: (query: string, ...params: any[]) => unknown;
  $queryRawUnsafe: (query: string, ...params: any[]) => unknown;
  $primary?: () => unknown;
  $replica?: () => unknown;
}

function createClient(): RawQueryClient {
  return {
    $executeRawUnsafe: vi.fn(),
    $queryRawUnsafe: vi.fn(),
  };
}

describe('getRawQueryClient', () => {
  test('uses a replica client for read queries when replicas are enabled', () => {
    const replica = createClient();
    const client = {
      ...createClient(),
      $replica: vi.fn(() => replica),
    };

    expect(getRawQueryClient(client, { useReplica: true })).toBe(replica);
  });

  test('keeps read queries on the primary client when replicas are disabled', () => {
    const client = {
      ...createClient(),
      $replica: vi.fn(() => createClient()),
    };

    expect(getRawQueryClient(client, { useReplica: false })).toBe(client);
  });

  test('uses the primary client for raw writes when available', () => {
    const primary = createClient();
    const client = {
      ...createClient(),
      $primary: vi.fn(() => primary),
      $replica: vi.fn(() => createClient()),
    };

    expect(getRawQueryClient(client, { useReplica: true, write: true })).toBe(primary);
  });

  test('falls back to the current client for raw writes without a primary helper', () => {
    const client = createClient();

    expect(getRawQueryClient(client, { write: true })).toBe(client);
  });
});

describe('pagedRawQuery default ordering', () => {
  function mockQueries(count = '4') {
    const queryRaw = vi.mocked((prisma.client as any).$queryRawUnsafe);
    queryRaw.mockClear();
    queryRaw.mockImplementation(async (sql: string) =>
      sql.includes('count(*) as num') ? [{ num: count }] : [{ id: 1 }],
    );
    return queryRaw;
  }

  test.each([undefined, 5])(
    'applies trusted default order only to the page query with cap %s',
    async maxResults => {
      const queryRaw = mockQueries('5');
      const result = await prisma.pagedRawQuery(
        'select * from thing',
        {},
        { page: 2, pageSize: 2, maxResults },
        'test',
        'max(created_at) desc, session_id',
      );

      expect(queryRaw).toHaveBeenCalledTimes(2);
      expect(queryRaw.mock.calls[0][0]).not.toContain('order by max(created_at) desc');
      expect(queryRaw.mock.calls[1][0]).toContain('order by max(created_at) desc, session_id');
      expect(queryRaw.mock.calls[1][0]).toContain('limit 2 offset 2');
      expect(result).toEqual({
        data: [{ id: 1 }],
        count: 5,
        page: 2,
        pageSize: 2,
        isCapped: !!maxResults,
        orderBy: undefined,
      });
    },
  );

  test('keeps explicit ordering and legacy no-order behavior', async () => {
    const queryRaw = mockQueries();
    const result = await prisma.pagedRawQuery(
      'select * from thing',
      {},
      { page: 1, pageSize: 2, orderBy: 'name', sortDescending: true },
      undefined,
      'max(created_at) desc, session_id',
    );
    expect(queryRaw.mock.calls[1][0]).toContain('order by name desc');
    expect(queryRaw.mock.calls[1][0]).not.toContain('order by max(created_at) desc, session_id');
    expect(result.orderBy).toBe('name');
    queryRaw.mockClear();
    await prisma.pagedRawQuery('select * from thing', {}, { page: 1, pageSize: 2 });
    expect(queryRaw.mock.calls[1][0]).not.toMatch(/order by/);
  });
});