#!/usr/bin/env node
/**
 * Checks that every icon a node asks for is one Lucide actually has.
 *
 * Nodes declare an icon with `@icon <name>` and the editor resolves the name to
 * a Lucide component. A name Lucide does not have does not fail anything - it
 * quietly becomes the default icon - so the only way to notice is to look at
 * every node on a canvas. This looks instead:
 *
 *   node scripts/gen-node-icons.js
 *
 * Exits non-zero and names the nodes if any icon cannot be resolved, so it can
 * go in a pre-commit hook or CI.
 */

const fs = require('fs')
const path = require('path')

const ROOT = path.resolve(__dirname, '..')
const NODES_DIR = path.join(ROOT, 'nodes')

// Kept in step with ICON_ALIASES in webui/src/config/nodeCategories.ts - this
// script has no way to read the TypeScript one.
const ALIASES = {
  images: 'GalleryHorizontalEnd',
  'octagon-x': 'XOctagon',
}

function pascal(name) {
  return name.split('-').map((w) => (w ? w[0].toUpperCase() + w.slice(1) : '')).join('')
}

function collectNodeFiles(dir) {
  const out = []
  for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
    const full = path.join(dir, entry.name)
    if (entry.isDirectory()) out.push(...collectNodeFiles(full))
    else if (entry.name.endsWith('.js')) out.push(full)
  }
  return out
}

function iconsInUse() {
  const found = new Map() // icon name -> [node ids]
  for (const file of collectNodeFiles(NODES_DIR)) {
    const code = fs.readFileSync(file, 'utf8')
    const icon = code.match(/@icon\s+([a-z0-9-]+)/i)
    const id = code.match(/@node\s+([a-z0-9-]+)/i)
    if (!icon) continue
    const name = icon[1].toLowerCase()
    if (!found.has(name)) found.set(name, [])
    found.get(name).push(id ? id[1] : path.basename(file))
  }
  return found
}

function main() {
  const inUse = iconsInUse()

  let lucide
  try {
    lucide = require(path.join(ROOT, 'webui/node_modules/lucide-react'))
  } catch (e) {
    console.error('Could not load lucide-react from webui/node_modules - run npm install first')
    process.exit(2)
  }

  const unresolved = []
  for (const name of [...inUse.keys()].sort()) {
    const component = ALIASES[name] || pascal(name)
    if (!lucide[component]) unresolved.push([name, component, inUse.get(name)])
  }

  if (unresolved.length) {
    console.error('These icon names do not exist in lucide-react:')
    for (const [name, component, nodes] of unresolved) {
      console.error(`  @icon ${name} (tried ${component}) - used by ${nodes.join(', ')}`)
    }
    console.error('\nAdd an alias in webui/src/config/nodeCategories.ts, or change the')
    console.error('node to a name Lucide has: https://lucide.dev/icons')
    process.exit(1)
  }

  const files = collectNodeFiles(NODES_DIR)
  const withIcon = [...inUse.values()].reduce((n, ids) => n + ids.length, 0)
  console.log(`${inUse.size} distinct icons across ${withIcon} nodes - all resolve`)
  if (withIcon < files.length) {
    console.log(`${files.length - withIcon} node file(s) declare no @icon and will show their initial`)
  }
}

main()