#!/usr/bin/env node
/**
 * Trace nav PNG lockups to SVG via potrace (high-fidelity paths from approved raster).
 * Usage: node scripts/brand/trace-nav-svg.mjs
 */
import { promises as fs } from 'node:fs'
import path from 'node:path'
import { fileURLToPath } from 'node:url'
import potrace from 'potrace'

const __dirname = path.dirname(fileURLToPath(import.meta.url))
const brandDir = path.join(__dirname, '../../public/brand')

const traces = [
  {
    input: 'logo-horizontal-nav.png',
    output: 'logo-horizontal-nav.svg',
    title: 'Miracles in Motion Foundation',
    potrace: {
      color: 'auto',
      background: 'transparent',
      turdSize: 2,
      optTolerance: 0.2,
      threshold: 180,
    },
  },
  {
    input: 'logo-symbol-nav.png',
    output: 'logo-symbol-nav.svg',
    title: 'Miracles in Motion Foundation symbol',
    potrace: {
      color: 'auto',
      background: 'transparent',
      turdSize: 2,
      optTolerance: 0.15,
      threshold: 200,
    },
  },
]

function tracePng(inputPath, options) {
  return new Promise((resolve, reject) => {
    potrace.trace(inputPath, options, (err, svg) => {
      if (err) reject(err)
      else resolve(svg)
    })
  })
}

function normalizeSvg(svg, title) {
  let out = svg.replace(/<\?xml[^>]*>\s*/i, '')
  if (!out.includes('aria-hidden')) {
    out = out.replace(/<svg\b/, '<svg role="img" aria-hidden="true"')
  }
  if (!out.includes('<title>')) {
    out = out.replace(/<svg([^>]*)>/, `<svg$1>\n  <title>${title}</title>`)
  }
  return out.trim() + '\n'
}

async function main() {
  for (const job of traces) {
    const inputPath = path.join(brandDir, job.input)
    const outputPath = path.join(brandDir, job.output)
    await fs.access(inputPath)
    const raw = await tracePng(inputPath, job.potrace)
    const svg = normalizeSvg(raw, job.title)
    await fs.writeFile(outputPath, svg)
    console.log(`Wrote ${job.output} (${svg.length} bytes)`)
  }
}

main().catch((err) => {
  console.error(err)
  process.exit(1)
})