import { run } from '@ember/runloop';
import { module, test } from 'qunit';
import { setupRenderingTest } from 'ember-qunit';
import { find, render, settled } from '@ember/test-helpers';
import hbs from 'htmlbars-inline-precompile';
import Pretender from 'pretender';
import sinon from 'sinon';
import { logEncode } from '../../../mirage/data/logs';
import { selectOpen, selectOpenChoose } from '../../utils/ember-power-select-extensions';
import { componentA11yAudit } from 'nomad-ui/tests/helpers/a11y-audit';

module('Integration | Component | agent-monitor', function(hooks) {
  setupRenderingTest(hooks);

  const LOG_MESSAGE = 'log message goes here';

  hooks.beforeEach(function() {
    // Normally this would be called server, but server is a prop of this component.
    this.pretender = new Pretender(function() {
      this.get('/v1/regions', () => [200, {}, '[]']);
      this.get('/v1/agent/monitor', ({ queryParams }) => [
        200,
        {},
        logEncode([`[${(queryParams.log_level || 'info').toUpperCase()}] ${LOG_MESSAGE}\n`], 0),
      ]);
    });
  });

  hooks.afterEach(function() {
    this.pretender.shutdown();
  });

  const INTERVAL = 200;

  const commonTemplate = hbs`
    <AgentMonitor
      @level={{level}}
      @client={{client}}
      @server={{server}}
      @onLevelChange={{onLevelChange}} />
  `;

  test('basic appearance', async function(assert) {
    this.setProperties({
      level: 'info',
      client: { id: 'client1' },
    });

    run.later(run, run.cancelTimers, INTERVAL);

    await render(commonTemplate);

    assert.ok(find('[data-test-level-switcher]'));
    assert.ok(find('[data-test-toggle]'));
    assert.ok(find('[data-test-log-box]'));
    assert.ok(find('[data-test-log-box].is-full-bleed.is-dark'));

    await componentA11yAudit(this.element, assert);
  });

  test('when provided with a client, AgentMonitor streams logs for the client', async function(assert) {
    this.setProperties({
      level: 'info',
      client: { id: 'client1' },
    });

    run.later(run, run.cancelTimers, INTERVAL);

    await render(commonTemplate);

    const logRequest = this.pretender.handledRequests[1];
    assert.ok(logRequest.url.startsWith('/v1/agent/monitor'));
    assert.ok(logRequest.url.includes('client_id=client1'));
    assert.ok(logRequest.url.includes('log_level=info'));
    assert.notOk(logRequest.url.includes('server_id'));
  });

  test('when provided with a server, AgentMonitor streams logs for the server', async function(assert) {
    this.setProperties({
      level: 'warn',
      server: { id: 'server1' },
    });

    run.later(run, run.cancelTimers, INTERVAL);

    await render(commonTemplate);

    const logRequest = this.pretender.handledRequests[1];
    assert.ok(logRequest.url.startsWith('/v1/agent/monitor'));
    assert.ok(logRequest.url.includes('server_id=server1'));
    assert.ok(logRequest.url.includes('log_level=warn'));
    assert.notOk(logRequest.url.includes('client_id'));
  });

  test('switching levels calls onLevelChange and restarts the logger', async function(assert) {
    const onLevelChange = sinon.spy();
    const newLevel = 'trace';

    this.setProperties({
      level: 'info',
      client: { id: 'client1' },
      onLevelChange,
    });

    run.later(run, run.cancelTimers, INTERVAL);

    await render(commonTemplate);
    await settled();

    const contentId = await selectOpen('[data-test-level-switcher]');
    run.later(run, run.cancelTimers, INTERVAL);
    await selectOpenChoose(contentId, newLevel.capitalize());
    await settled();

    assert.ok(onLevelChange.calledOnce);
    assert.ok(onLevelChange.calledWith(newLevel));

    const secondLogRequest = this.pretender.handledRequests[2];
    assert.ok(secondLogRequest.url.includes(`log_level=${newLevel}`));
  });

  test('when switching levels, the scrollback is preserved and annotated with a switch message', async function(assert) {
    const newLevel = 'trace';
    const onLevelChange = sinon.spy();

    this.setProperties({
      level: 'info',
      client: { id: 'client1' },
      onLevelChange,
    });

    run.later(run, run.cancelTimers, INTERVAL);

    await render(commonTemplate);
    await settled();
    assert.equal(find('[data-test-log-cli]').textContent, `[INFO] ${LOG_MESSAGE}\n`);

    const contentId = await selectOpen('[data-test-level-switcher]');
    run.later(run, run.cancelTimers, INTERVAL);
    await selectOpenChoose(contentId, newLevel.capitalize());
    await settled();

    assert.equal(
      find('[data-test-log-cli]').textContent,
      `[INFO] ${LOG_MESSAGE}\n\n...changing log level to ${newLevel}...\n\n[TRACE] ${LOG_MESSAGE}\n`
    );
  });

  test('when switching levels and there is no scrollback, there is no appended switch message', async function(assert) {
    const newLevel = 'trace';
    const onLevelChange = sinon.spy();

    // Emit nothing for the first request
    this.pretender.get('/v1/agent/monitor', ({ queryParams }) => [
      200,
      {},
      queryParams.log_level === 'info'
        ? logEncode([''], 0)
        : logEncode([`[${(queryParams.log_level || 'info').toUpperCase()}] ${LOG_MESSAGE}\n`], 0),
    ]);

    this.setProperties({
      level: 'info',
      client: { id: 'client1' },
      onLevelChange,
    });

    run.later(run, run.cancelTimers, INTERVAL);

    await render(commonTemplate);
    await settled();
    assert.equal(find('[data-test-log-cli]').textContent, '');

    const contentId = await selectOpen('[data-test-level-switcher]');
    run.later(run, run.cancelTimers, INTERVAL);
    await selectOpenChoose(contentId, newLevel.capitalize());
    await settled();

    assert.equal(find('[data-test-log-cli]').textContent, `[TRACE] ${LOG_MESSAGE}\n`);
  });
});