#!/usr/bin/env node
/**
 * cli:apply-form-directives — Persist the /ui-design judgment into a pagespec.
 *
 * Writes a namespaced `uiDesign` overlay (formLayout + per-field currentUserFk /
 * section / control + order) into the pagespec's machine block, so the judgment
 * is DURABLE and reproducible. The `/ui-design` skill decides the directives; this
 * CLI only applies them. scaffold-component still RENDERS the page (the overlay
 * feeds the spec it is given).
 *
 *   npx tsx skills/ui-design/cli/apply-form-directives/index.ts --spec '<JSON>'
 */
import { parseArgs } from 'node:util'
import { validate } from './validate.js'
import { execute } from './execute.js'
import { generateEnvelope, failGenerate, printEnvelope } from '../../../lib/output.js'
import type { ApplyFormDirectivesInput } from './types.js'

const COMMAND = 'apply-form-directives'

function main(): void {
  const { values } = parseArgs({
    options: { spec: { type: 'string' } },
    strict: true,
  })

  if (!values.spec) {
    printEnvelope(failGenerate(COMMAND, ['--spec is required']))
    process.exit(1)
  }

  let raw: unknown
  try {
    raw = JSON.parse(values.spec)
  } catch {
    printEnvelope(failGenerate(COMMAND, ['Invalid JSON']))
    process.exit(1)
  }

  const validation = validate(raw)
  if (!validation.valid) {
    printEnvelope(failGenerate(COMMAND, validation.errors))
    process.exit(1)
  }

  try {
    const { pagespecPath, overlay, warnings } = execute(raw as ApplyFormDirectivesInput)
    printEnvelope(generateEnvelope(COMMAND, {
      data: { pagespecPath, uiDesign: overlay, warnings: [...validation.warnings, ...warnings] },
      filesModified: [pagespecPath],
      nextSteps: [
        'Re-scaffold the page with scaffold-component (the overlay feeds the spec) so the judgment renders live',
        'Run /ui-components to fix mechanical tokens on the result',
      ],
    }))
  } catch (e) {
    printEnvelope(failGenerate(COMMAND, [e instanceof Error ? e.message : String(e)]))
    process.exit(1)
  }
}

main()