import test from 'node:test';
import assert from 'node:assert/strict';
import { applyChannelPatch, defaultChannelState, KNOWLEDGE_MODULE_ID, normalizeChannelState } from './channel-runtime.js';

test('module removal unmounts the module but preserves a reversible before state', () => {
  const receipt = applyChannelPatch(defaultChannelState('2026-08-09T00:00:00.000Z'), {
    operation: 'set_module_state',
    moduleId: KNOWLEDGE_MODULE_ID,
    installed: false,
  }, '2026-08-09T00:01:00.000Z');
  assert.equal(receipt.after.modules[0].installed, false);
  assert.equal(receipt.after.modules[0].mounted, false);
  assert.equal(receipt.before.modules[0].installed, true);
  assert.equal(receipt.after.revision, 1);
});

test('unknown modules fail closed instead of becoming UI-only entries', () => {
  assert.throws(() => applyChannelPatch(defaultChannelState(), {
    operation: 'set_module_state',
    moduleId: 'UNREGISTERED-MODULE',
    installed: true,
  }), /未在光湖注册表登记/);
});

test('stored state is normalized against the current official registry', () => {
  const state = normalizeChannelState({
    schema: 'hololake.personal-channel-state/v1',
    channelId: 'CHANNEL-ICE-001',
    revision: 3,
    updatedAt: '2026-08-09T00:00:00.000Z',
    modules: [{ id: KNOWLEDGE_MODULE_ID, installed: false, mounted: true, order: 0 }],
  });
  assert.equal(state.modules[0].installed, false);
  assert.equal(state.modules[0].mounted, false);
});