import { describe, test, expect, beforeEach, afterEach } from 'bun:test';
import Database from 'bun:sqlite';
import { initializeDatabase, ensureUserExists } from '../../../src/db';
import { GroupSyncService } from '../../../src/services/group-sync';
import { ResponseQueue } from '../../../src/services/response-queue';

const envBackup = { ...process.env };
let originalSyncMembers: any;
let originalSyncGroups: any;

function sleep(ms: number) {
  return new Promise(res => setTimeout(res, ms));
}

describe('GroupSyncService - scheduler de miembros', () => {
  beforeEach(() => {
    originalSyncMembers = GroupSyncService.syncMembersForActiveGroups;
    originalSyncGroups = GroupSyncService.syncGroups;
  });

  afterEach(() => {
    GroupSyncService.stopMembersScheduler();
    GroupSyncService.stopGroupsScheduler();
    GroupSyncService.syncMembersForActiveGroups = originalSyncMembers;
    GroupSyncService.syncGroups = originalSyncGroups;
    process.env = envBackup;
  });

  test('no arranca en entorno de test', async () => {
    process.env = { ...envBackup, NODE_ENV: 'test' };
    let called = 0;
    GroupSyncService.syncMembersForActiveGroups = async () => {
      called++;
      return { groups: 0, added: 0, updated: 0, deactivated: 0 };
    };

    GroupSyncService.startMembersScheduler();
    await sleep(100);
    expect(called).toBe(0);
  });

  test('arranca en producción y ejecuta según intervalo', async () => {
    process.env = { ...envBackup, NODE_ENV: 'production', GROUP_MEMBERS_SYNC_INTERVAL_MS: '30' };
    let called = 0;
    GroupSyncService.syncMembersForActiveGroups = async () => {
      called++;
      return { groups: 0, added: 0, updated: 0, deactivated: 0 };
    };

    GroupSyncService.startMembersScheduler();
    await sleep(120);
    GroupSyncService.stopMembersScheduler();
    expect(called).toBeGreaterThanOrEqual(1);
  });

  test('groups scheduler no arranca en entorno de test', async () => {
    process.env = { ...envBackup, NODE_ENV: 'test' };
    let called = 0;
    GroupSyncService.syncGroups = async () => {
      called++;
      return { added: 0, updated: 0 };
    };

    GroupSyncService.startGroupsScheduler();
    await sleep(100);
    expect(called).toBe(0);
    expect(GroupSyncService.getSecondsUntilNextGroupSync()).toBeNull();
  });

  test('groups scheduler arranca en producción y programa next tick', async () => {
    process.env = { ...envBackup, NODE_ENV: 'production', GROUP_SYNC_INTERVAL_MS: '30' };
    let called = 0;
    GroupSyncService.syncGroups = async () => {
      called++;
      return { added: 0, updated: 0 };
    };

    GroupSyncService.startGroupsScheduler();
    const secs1 = GroupSyncService.getSecondsUntilNextGroupSync();
    expect(secs1).not.toBeNull();
    expect(Number(secs1)).toBeGreaterThan(0);

    await sleep(120);
    GroupSyncService.stopGroupsScheduler();
    expect(called).toBeGreaterThanOrEqual(1);
  });

  test('al desactivarse un grupo en sync: revoca tokens, desactiva membresía y notifica admins', async () => {
    process.env = { ...envBackup, NODE_ENV: 'development', ADMIN_USERS: '34600123456' };

    const memdb = new Database(':memory:');
    initializeDatabase(memdb);
    (GroupSyncService as any).dbInstance = memdb;
    (ResponseQueue as any).dbInstance = memdb;

    // Sembrar grupo activo con miembro y token de calendario
    memdb.exec(`INSERT INTO groups (id, community_id, name, active, archived, last_verified) VALUES ('g1@g.us','comm-1','G1',1,0,strftime('%Y-%m-%d %H:%M:%f','now'))`);
    const uid = ensureUserExists('34600123456', memdb)!;
    memdb.exec(`INSERT INTO group_members (group_id, user_id, is_admin, is_active, first_seen_at, last_seen_at) VALUES ('g1@g.us','${uid}',0,1,strftime('%Y-%m-%d %H:%M:%f','now'),strftime('%Y-%m-%d %H:%M:%f','now'))`);
    memdb.exec(`INSERT INTO calendar_tokens (type, user_id, group_id, token_hash, created_at) VALUES ('group','${uid}','g1@g.us','h1',strftime('%Y-%m-%d %H:%M:%f','now'))`);

    // Stub: API devuelve 0 grupos → el existente pasa a inactivo
    const originalFetch = (GroupSyncService as any).fetchGroupsFromAPI;
    (GroupSyncService as any).fetchGroupsFromAPI = async () => [];

    try {
      await GroupSyncService.syncGroups(true);
    } finally {
      // Restaurar stub
      (GroupSyncService as any).fetchGroupsFromAPI = originalFetch;
    }

    // Tokens revocados
    const tok = memdb.query(`SELECT revoked_at FROM calendar_tokens WHERE group_id='g1@g.us'`).get() as any;
    expect(tok && tok.revoked_at).toBeTruthy();

    // Membresías desactivadas
    const mem = memdb.query(`SELECT is_active FROM group_members WHERE group_id='g1@g.us'`).get() as any;
    expect(Number(mem?.is_active || 0)).toBe(0);

    // Notificación encolada a admins
    const msg = memdb.query(`SELECT message FROM response_queue ORDER BY id DESC LIMIT 1`).get() as any;
    expect(msg && String(msg.message)).toContain('/admin archivar-grupo g1@g.us');
  });
});