import { readFileSync } from 'node:fs'
import { join } from 'node:path'
import { describe, expect, it } from 'vitest'

import { pngSize } from './render-icons.mjs'

const brand = join(import.meta.dirname, '..', 'brand')

describe('sticker variants embed the mark verbatim', () => {
  // Both stickers claim to hold mark.svg's elements unchanged, only wrapped
  // in a scale/translate. If someone tweaks a rect or the squiggle in one
  // place but not the others, the logo forks.
  const markLines = readFileSync(join(brand, 'mark.svg'), 'utf8')
    .split('\n')
    .map((l) => l.trim())
    .filter((l) => l.startsWith('<rect') || l.startsWith('<path') || l.startsWith('d='))

  it.each(['sticker.svg', 'sticker-round.svg'])('%s', (file) => {
    const svg = readFileSync(join(brand, file), 'utf8')
    expect(markLines.length).toBeGreaterThan(0)
    for (const line of markLines) {
      expect(svg).toContain(line)
    }
  })
})

describe('pngSize', () => {
  it('reads IHDR dimensions', () => {
    const png = readFileSync(join(brand, 'icon480-round.png'))
    expect(pngSize(png)).toEqual({ width: 480, height: 480 })
  })

  it('rejects non-PNG bytes', () => {
    expect(() => pngSize(new Uint8Array([1, 2, 3]))).toThrow('not a PNG')
  })
})