import { describe, it } from 'node:test';
import assert from 'node:assert/strict';
import { classifyService } from '../src/classify.js';

describe('classifyService', () => {
  it('operational when available meets min and none paused', () => {
    assert.equal(
      classifyService({ min: 3, available: 3, running: 3, paused: 0, instances: [{ pid: 1, healthy: true }] }),
      'operational',
    );
  });

  it('degraded when a replica is paused even if floor is still met', () => {
    assert.equal(
      classifyService({
        min: 3,
        available: 3,
        running: 4,
        paused: 1,
        instances: [
          { pid: 1, paused: true, healthy: false },
          { pid: 2, paused: false, healthy: true },
        ],
      }),
      'degraded',
    );
  });

  it('not operational when min>0 and nothing available', () => {
    assert.equal(classifyService({ min: 1, available: 0, running: 0, paused: 0, instances: [] }), 'down');
  });

  it('optional idle (min 0, not running) is operational', () => {
    assert.equal(classifyService({ min: 0, available: 0, running: 0, paused: 0 }), 'operational');
  });
});