import test from 'brittle'
import {
  allowedModesFor,
  defaultModeFromMeta,
  nextChartMode,
  normalizeChartMode,
  isCompositionChart,
} from '../shared/chart-types.js'
import { padLeftFor } from '../ui/charts.js'

test('normalizeChartMode aliases', (t) => {
  t.is(normalizeChartMode('STACK'), 'stacked')
  t.is(normalizeChartMode('multi-bar'), 'multibar')
  t.is(normalizeChartMode('nope'), 'line')
})

test('defaultModeFromMeta respects catalog', (t) => {
  t.is(defaultModeFromMeta({ chartType: 'area' }), 'area')
  t.is(defaultModeFromMeta({ chart_type: 'stacked' }), 'stacked')
  t.is(defaultModeFromMeta({}), 'line')
})

test('composition charts get pie in allowed modes', (t) => {
  const meta = {
    id: 'system.cpu',
    chartType: 'stacked',
    units: 'percentage',
    dimensions: ['user', 'system', 'idle'],
  }
  t.ok(isCompositionChart(meta))
  const allowed = allowedModesFor(meta)
  t.ok(allowed.includes('pie'))
  t.ok(allowed.includes('stacked'))
  t.is(allowed[0], 'stacked')
})

test('line charts cycle through sensible modes', (t) => {
  const meta = { chartType: 'line', dimensions: ['a', 'b'] }
  let mode = 'line'
  const seen = new Set()
  for (let i = 0; i < 8; i++) {
    mode = nextChartMode(mode, meta)
    seen.add(mode)
  }
  t.ok(seen.has('area'))
  t.ok(seen.has('bar'))
  t.absent(seen.has('pie'))
})

test('padLeftFor matches Y-axis layout', (t) => {
  t.is(padLeftFor('', true), 46)
  t.is(padLeftFor('kilobytes', true), 52)
  t.is(padLeftFor('percentage', false), 0)
})