import { describe, test, expect, beforeAll, afterAll, beforeEach } from 'bun:test';
import { Database } from 'bun:sqlite';
import { initializeDatabase } from '../../../src/db';
import { ResponseQueue } from '../../../src/services/response-queue';

let testDb: Database;
let envBackup: NodeJS.ProcessEnv;

describe('ResponseQueue (persistent add)', () => {
  beforeAll(() => {
    envBackup = { ...process.env };
    testDb = new Database(':memory:');
    initializeDatabase(testDb);
    // Inyectar DB de pruebas
    (ResponseQueue as any).dbInstance = testDb;
  });

  afterAll(() => {
    process.env = envBackup;
    testDb.close();
  });

  beforeEach(() => {
    // Limpiar tabla entre tests
    testDb.exec('DELETE FROM response_queue');
    // Valor por defecto del número del bot (se puede cambiar en tests)
    process.env.CHATBOT_PHONE_NUMBER = '1234567890';
  });

  test('should persist queued responses to database', async () => {
    const before = testDb.query("SELECT COUNT(*) as count FROM response_queue").get() as any;
    expect(before.count).toBe(0);

    await ResponseQueue.add([
      { recipient: '111', message: 'hola 1' },
      { recipient: '222', message: 'hola 2' },
    ]);

    const after = testDb.query("SELECT COUNT(*) as count FROM response_queue").get() as any;
    expect(after.count).toBe(2);

    const rows = testDb.query("SELECT recipient, message, status FROM response_queue ORDER BY id").all() as any[];
    expect(rows[0].recipient).toBe('111');
    expect(rows[0].message).toBe('hola 1');
    expect(rows[0].status).toBe('queued');
    expect(rows[1].recipient).toBe('222');
    expect(rows[1].message).toBe('hola 2');
    expect(rows[1].status).toBe('queued');
  });

  test('should skip messages addressed to the bot number', async () => {
    process.env.CHATBOT_PHONE_NUMBER = '555111222';

    await ResponseQueue.add([
      { recipient: '555111222', message: 'no debe encolarse' },
      { recipient: '333', message: 'debe encolarse' },
    ]);

    const count = testDb.query("SELECT COUNT(*) as count FROM response_queue").get() as any;
    expect(count.count).toBe(1);

    const row = testDb.query("SELECT recipient, message FROM response_queue").get() as any;
    expect(row.recipient).toBe('333');
    expect(row.message).toBe('debe encolarse');
  });

  test('should ignore entries without recipient or message', async () => {
    await ResponseQueue.add([
      // inválidos:
      { recipient: '', message: 'sin destinatario' } as any,
      { recipient: '444', message: '' } as any,
      // válido:
      { recipient: '444', message: 'ok' },
    ]);

    const rows = testDb.query("SELECT recipient, message FROM response_queue ORDER BY id").all() as any[];
    expect(rows.length).toBe(1);
    expect(rows[0].recipient).toBe('444');
    expect(rows[0].message).toBe('ok');
  });

  test('should throw if database error occurs (e.g., missing table)', async () => {
    // Provocar error: eliminar tabla
    testDb.exec('DROP TABLE response_queue');

    await expect(ResponseQueue.add([{ recipient: '999', message: 'x' }]))
      .rejects
      .toBeTruthy();

    // Restaurar esquema para no afectar otros tests
    initializeDatabase(testDb);
  });
});