/**
 * Generates src/lib/ciRouteMeta.generated.ts from CodeIgniter app/Views/*.php files.
 * Run: node scripts/gen-ci-route-meta.mjs
 */
import fs from 'fs'
import path from 'path'
import { fileURLToPath } from 'url'

const __dirname = path.dirname(fileURLToPath(import.meta.url))
const viewsRoot = path.resolve(__dirname, '../../app_codeigniter/app/Views')
const outFile = path.resolve(__dirname, '../src/lib/ciRouteMeta.generated.ts')

const SKIP_DIRS = new Set([
  'layout',
  'partials',
  'errors',
  'pagination',
  'docs',
])

function humanize(slug) {
  const s = slug.replace(/\.php$/i, '').replace(/_/g, ' ')
  return s.replace(/\b\w/g, (c) => c.toUpperCase())
}

function walk(dir, baseRel) {
  const out = []
  let entries = []
  try {
    entries = fs.readdirSync(dir, { withFileTypes: true })
  } catch {
    return out
  }
  for (const e of entries) {
    const rel = path.join(baseRel, e.name)
    const full = path.join(dir, e.name)
    if (e.isDirectory()) {
      if (SKIP_DIRS.has(e.name)) continue
      out.push(...walk(full, rel))
    } else if (e.isFile() && e.name.endsWith('.php')) {
      out.push(rel.replace(/\\/g, '/'))
    }
  }
  return out
}

function main() {
  if (!fs.existsSync(viewsRoot)) {
    console.error('Missing Views folder:', viewsRoot)
    process.exit(1)
  }

  const files = walk(viewsRoot, '')
    .filter((f) => !f.includes('/layout/'))
    .sort()

  const entries = []
  for (const f of files) {
    const parts = f.split('/')
    const base = parts.pop().replace(/\.php$/i, '')
    const section = parts.join('/') || '(root)'
    const routeKey = [...parts, base].filter(Boolean).join('/')
    const ciViewPath = f
    const title = humanize(base)
    entries.push({ routeKey, title, ciViewPath })
  }

  const lines = []
  lines.push(`/** Auto-generated by scripts/gen-ci-route-meta.mjs — do not edit by hand. */`)
  lines.push(``)
  lines.push(`export type CiRouteMetaEntry = {`)
  lines.push(`  title: string`)
  lines.push(`  ciViewPath: string`)
  lines.push(`}`)
  lines.push(``)
  lines.push(`export const ciRouteMeta: Record<string, CiRouteMetaEntry> = {`)

  for (const { routeKey, title, ciViewPath } of entries) {
    const safeTitle = title.replace(/\\/g, '\\\\').replace(/'/g, "\\'")
    const safeView = ciViewPath.replace(/\\/g, '/')
    lines.push(`  '${routeKey}': { title: '${safeTitle}', ciViewPath: '${safeView}' },`)
  }

  lines.push(`}`)
  lines.push(``)

  fs.mkdirSync(path.dirname(outFile), { recursive: true })
  fs.writeFileSync(outFile, lines.join('\n'), 'utf8')
  console.log(`Wrote ${entries.length} entries → ${path.relative(process.cwd(), outFile)}`)
}

main()