import assert from 'node:assert/strict';
import fs from 'node:fs';
import path from 'node:path';
import test from 'node:test';

const root = path.resolve(import.meta.dirname, '../..');
const overview = fs.readFileSync(path.join(root, 'src/web/components/ClientOverviewPage.jsx'), 'utf8');
const instructions = fs.readFileSync(path.join(root, 'src/web/instructions.js'), 'utf8');
const prometheus = fs.readFileSync(path.join(root, 'src/web/prometheus.js'), 'utf8');
const server = fs.readFileSync(path.join(root, 'src/server/index.js'), 'utf8');
const styles = fs.readFileSync(path.join(root, 'src/web/styles.css'), 'utf8');
const dashboard = JSON.parse(fs.readFileSync(path.join(root, 'monitoring/grafana/harbor-gateway.json'), 'utf8'));

test('Gateway info drawer contains copyable Prometheus and Grafana instructions', () => {
  assert.match(instructions, /\.\.\.\(isGateway \? \[\{/);
  assert.match(instructions, /id: 'prometheus'/);
  assert.match(instructions, /title: 'Prometheus и Grafana'/);
  assert.match(instructions, /prometheusScrapeConfig\(controlHost\)/);
  assert.match(instructions, /label: 'prometheus\.yml'/);
  assert.match(instructions, /label: 'Grafana dashboard'/);
  assert.match(prometheus, /monitoring\/grafana\/harbor-gateway\.json/);
  assert.match(prometheus, /scrape_interval: 30s[\s\S]*metrics_path: \/metrics/);
  assert.match(overview, /const controlHost = window\.location\.host/);
  assert.match(overview, /client-copy-label">Скопировать/);
  assert.doesNotMatch(overview, /prometheus-toggle|Prometheus<\/span><\/button>/);
  assert.match(styles, /\.client-instruction-copy-button \{[\s\S]*width: 104px;[\s\S]*min-width: 104px/);
  assert.match(styles, /@media \(prefers-reduced-motion: reduce\)[\s\S]*\.client-copy-feedback/);
});

test('metrics route reads the current snapshot before static fallback', () => {
  const metricsRoute = server.indexOf("requestUrl.pathname === '/metrics'");
  const staticFallback = server.indexOf(': serveStatic(req, res)');

  assert.ok(metricsRoute >= 0 && metricsRoute < staticFallback);
  assert.match(server, /requestUrl\.pathname === '\/metrics'[\s\S]*deviceInventory\.metricsSnapshot\(\)/);
  assert.doesNotMatch(server.slice(metricsRoute, staticFallback), /deviceInventory\.refresh\(/);
});

test('Grafana dashboard is organized around period ranking and one stable device selection', () => {
  const expressions = dashboard.panels.flatMap((panel) => panel.targets || []).map(({ expr }) => expr).filter(Boolean);
  const titles = dashboard.panels.map(({ title }) => title);
  const deviceVariable = dashboard.templating.list[0];
  const freshness = dashboard.panels.find(({ id }) => id === 2);
  const topDevices = dashboard.panels.find(({ id }) => id === 5);
  const domains = dashboard.panels.find(({ id }) => id === 9);

  assert.equal(dashboard.title, 'Harbor Gateway: трафик');
  assert.equal(dashboard.refresh, '30s');
  assert.deepEqual(titles.filter((title) => ['Обзор', 'Устройство', 'Сервисы и домены', 'Техническая детализация'].includes(title)), [
    'Обзор',
    'Устройство',
    'Сервисы и домены',
    'Техническая детализация',
  ]);
  assert.ok(titles.includes('Скорость сейчас, средняя за 5 минут'));
  assert.ok(titles.includes('Топ-10 устройств за выбранный период'));
  assert.ok(titles.includes('${device_id:text}: накоплено'));
  assert.ok(titles.includes('${device_id:text}: сервисы за период'));
  assert.ok(titles.includes('${device_id:text}: домены за период'));
  assert.ok(expressions.some((expression) => expression.includes('harbor_traffic_bytes_total')));
  assert.ok(expressions.some((expression) => expression.includes('harbor_device_traffic_bytes_total')));
  assert.ok(expressions.some((expression) => expression.includes('harbor_device_domain_traffic_bytes_total{device_id="$device_id"}[$__range]')));
  assert.ok(expressions.some((expression) => expression.includes('harbor_domain_traffic_last_observed_timestamp_seconds')));
  assert.match(topDevices.targets[0].expr, /^topk\(10,[\s\S]*increase\(harbor_device_traffic_bytes_total\[\$__range\]\)[\s\S]*> 0[\s\S]*group_left \(name, ip\)/);
  assert.equal(topDevices.options.sortBy[0].desc, true);
  assert.match(topDevices.fieldConfig.overrides[1].properties[0].value[0].url, /var-device_id=\$\{__data\.fields/);
  assert.deepEqual(freshness.fieldConfig.defaults.thresholds.steps.map(({ value }) => value), [null, 60, 120]);
  assert.equal(freshness.fieldConfig.defaults.noValue, 'Нет данных');
  assert.equal(deviceVariable.name, 'device_id');
  assert.equal(deviceVariable.multi, false);
  assert.equal(deviceVariable.includeAll, false);
  assert.match(deviceVariable.query.query, /query_result\(label_join\(/);
  assert.match(deviceVariable.regex, /<text>/);
  assert.match(deviceVariable.regex, /<value>/);
  assert.deepEqual(domains.transformations[0].options.indexByName, { service: 0, domain: 1, Value: 2 });
  assert.match(domains.targets[0].expr, /^topk\(15,[\s\S]*> 0\)$/);
});