import { describe, expect, it } from 'vitest';
import {
  generateSampleSeries,
  validateChartSeries,
  resolveChartSeries,
  chartSeriesDelta,
  chartSeriesPeak,
} from './chartSampleData';

describe('chartSampleData', () => {
  const kinds = ['hashrate', 'accept', 'cpu', 'mem', 'gpu'] as const;

  it.each(kinds)('generateSampleSeries(%s) validates', (kind) => {
    const series = generateSampleSeries(kind, 48);
    expect(series).toHaveLength(48);
    const v = validateChartSeries(series);
    expect(v.ok, v.errors.join('; ')).toBe(true);
    expect(chartSeriesPeak(series)).toBeGreaterThan(0);
  });

  it('resolveChartSeries returns empty when live is empty', () => {
    const { data, mode } = resolveChartSeries([]);
    expect(mode).toBe('empty');
    expect(data).toHaveLength(0);
  });

  it('resolveChartSeries returns live slice when data exists', () => {
    const live = generateSampleSeries('cpu', 20);
    const { data, mode } = resolveChartSeries(live);
    expect(mode).toBe('live');
    expect(data.length).toBe(20);
  });

  it('chartSeriesDelta computes trend', () => {
    const series = generateSampleSeries('hashrate', 48);
    const delta = chartSeriesDelta(series);
    expect(delta).not.toBeNull();
    expect(delta!).toBeGreaterThan(0);
  });
});