import test from 'node:test';
import assert from 'node:assert/strict';
import { readFileSync } from 'node:fs';
import {
  accentForSeverity,
  FIRMS_AMBIENT_COHORT_LIMIT,
  FIRMS_OVERLAY_SOURCE_ID,
  satelliteShortName,
  formatFrpMw,
} from './firmsLabels.js';

test('FIRMS card accents are the six FRP ramp stops, weakest as the fallback', () => {
  // Ember #9e2a1b … white-hot #fff3b0, lightness rising with power.
  assert.equal(accentForSeverity('ember'), '158, 42, 27');
  assert.equal(accentForSeverity('red'), '210, 64, 31');
  assert.equal(accentForSeverity('flame'), '240, 106, 40');
  assert.equal(accentForSeverity('orange'), '251, 154, 46');
  assert.equal(accentForSeverity('gold'), '253, 200, 74');
  assert.equal(accentForSeverity('white-hot'), '255, 243, 176');
  assert.equal(accentForSeverity('blue'), accentForSeverity('ember'));
  assert.equal(accentForSeverity('chartreuse'), accentForSeverity('ember'));
});

test('FIRMS power that rounds to 10 MW drops the decimal', () => {
  assert.equal(formatFrpMw(9.96), '10');
  assert.equal(formatFrpMw(9.94), '9.9');
  assert.equal(formatFrpMw(0.8), '0.8');
  assert.equal(formatFrpMw(1520.27), '1520');
  assert.equal(formatFrpMw(210.4), '210');
});

test('FIRMS satellite names retain the three VIIRS abbreviations', () => {
  assert.equal(satelliteShortName('N20'), 'N20');
  assert.equal(satelliteShortName('N21'), 'N21');
  assert.equal(satelliteShortName('N'), 'SNPP');
  assert.equal(satelliteShortName('TERRA-X9'), 'TERRA-');
  assert.equal(satelliteShortName(''), '');
});

test('FIRMS host registration constants pin the shipped source budget', () => {
  assert.equal(FIRMS_OVERLAY_SOURCE_ID, 'firms');
  assert.equal(FIRMS_AMBIENT_COHORT_LIMIT, 18);
});

test('FIRMS helper module cannot resurrect a dedicated canvas renderer', () => {
  const source = readFileSync(new URL('./firmsLabels.js', import.meta.url), 'utf8');
  assert.doesNotMatch(source, /createElement\(['"]canvas['"]\)/);
  assert.doesNotMatch(source, /postRender/);
  assert.doesNotMatch(source, /worldToWindowCoordinates/);
});