#!/usr/bin/env node
/**
 * cli:scaffold-extension-config — Generate ExtensionConfig
 */
import { parseArgsOrFail as parseArgs } from '../../../../../lib/cli-args.js'
import { mkdirSync, writeFileSync } from 'node:fs'
import { dirname, resolve, join } from 'node:path'
import { validate } from './validate.js'
import { generate } from './generate.js'
import { generateEnvelope, failGenerate, printEnvelope } from '../../../../../lib/output.js'
import { readSpecArg } from '../../../../../lib/spec-arg.js'
import { customisedWarnings, writeGeneratedFiles } from '../../../../../lib/generated-writes.js'

const COMMAND = 'scaffold-extension-config'

function main(): void {
  const { values } = parseArgs({
    options: {
      spec: { type: 'string' }, 'spec-file': { type: 'string' },
      outdir: { type: 'string' },
      dry_run: { type: 'boolean', default: false },
    },
    strict: true,
  })

  const specSrc = readSpecArg(values)
  if ('error' in specSrc) {
    printEnvelope(failGenerate(COMMAND, [specSrc.error]))
    process.exit(1)
  }

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

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

  // The PARSED spec — one entry point contract for every scaffolder: what
  // generate() receives is what Zod validated, never the raw JSON.
  const spec = validation.data
  const files = generate(spec)

  if (values.dry_run) {
    printEnvelope(generateEnvelope(COMMAND, {
      data: { dryRun: true, files: files.map(f => f.path) },
    }))
    process.exit(0)
  }

  const outdir = values.outdir ?? spec.projectPath
  // Guarded write (lib/generated-writes): the SKILL tells the client to populate tableColumns /
  // formFields by hand — a `// @customised` config is skipped + warned, never overwritten (B-CRIT-04).
  const writes = writeGeneratedFiles(files, { outdir })
  const written = writes.written

  printEnvelope(generateEnvelope(COMMAND, {
    data: { module: spec.module, fileCount: written.length, skipped: writes.skipped },
    filesCreated: written,
    warnings: customisedWarnings(writes),
    nextSteps: ['Import config in app entry point'],
  }))
}

main()