/**
 * scaffold-controller — CLI entry contract. `index.ts` used to validate with
 * Zod and then hand the RAW spec to generate(): every documented default
 * (`actions`, `customActions`, `fields[].required`, action httpMethod/scope…)
 * was absent at runtime and the SKILL's own example crashed with a stack
 * trace. These tests run the real entry point on the documented invocation.
 *
 * QC 2026-09-24 (lot 13): the lot-1 "parity" test compared generate(parse(x))
 * to generate(parse(parse(x))) — schema output on both sides, so a schema
 * stripping a key the renderer reads could never be detected. The parity
 * block now holds two REAL properties (lib/__tests__/helpers/spec-parity):
 * no-strip against the RAW example, defaults-only against the schema's
 * DECLARED defaults — each proven to fire.
 */
import { describe, it, expect } from 'vitest'
import { dirname, resolve } from 'node:path'
import { fileURLToPath } from 'node:url'
import { z } from 'zod'
import { runCli } from '../../../../../../lib/__tests__/helpers/run-cli.js'
import { specParity } from '../../../../../../lib/__tests__/helpers/spec-parity.js'
import { validate } from '../validate.js'
import { generate } from '../generate.js'
import { ControllerFieldSchema, ScaffoldControllerInputSchema } from '../types.js'

const INDEX = resolve(dirname(fileURLToPath(import.meta.url)), '../index.ts')

/** The invocation documented in backend/controller/SKILL.md (## Invocation), verbatim. */
const DOC_EXAMPLE = {
  name: 'Employee', module: 'hrm', appCode: 'MyApp', applicationCode: 'hr', section: 'employees',
  navRoute: 'hrm.employees',
  fields: [{ name: 'firstName', type: 'string', required: true }, { name: 'lastName', type: 'string', required: true }],
  projectPath: '/path',
}

describe('scaffold-controller — the CLI entry runs the PARSED spec', () => {
  it('runs the documented SKILL example in --dry_run (the raw spec crashed on `actions.map`)', () => {
    const r = runCli(INDEX, ['--spec', JSON.stringify(DOC_EXAMPLE), '--dry_run'])
    expect(r.envelope, r.stderr).not.toBeNull()
    expect(r.envelope.success, JSON.stringify(r.envelope.errors)).toBe(true)
    expect(r.status).toBe(0)
    expect(r.envelope.data.dryRun).toBe(true)
    expect(r.envelope.data.files.some((f: string) => f.endsWith('EmployeesController.cs'))).toBe(true)
  })

  it('validate() returns the parsed spec with the documented defaults applied', () => {
    const v = validate(DOC_EXAMPLE)
    expect(v.valid).toBe(true)
    expect(v.data?.actions).toEqual(['read', 'create', 'update', 'delete'])
    expect(v.data?.customActions).toEqual([])
    expect(v.data?.versioned).toBe(false)
  })

  it('validate() carries no data when the spec is refused', () => {
    const v = validate({ ...DOC_EXAMPLE, navRoute: 'bad' })
    expect(v.valid).toBe(false)
    expect(v.data).toBeUndefined()
  })
})

describe('scaffold-controller — parity RAW ↔ PARSED (real properties, not schema-vs-schema)', () => {
  const parsed = () => validate(DOC_EXAMPLE).data!

  it('(a) no-strip: every key path of the documented example survives the parse with its value', () => {
    const report = specParity(DOC_EXAMPLE, parsed(), ScaffoldControllerInputSchema)
    expect(report.rawPaths).toContain('fields[1].required') // the walk reaches the nested keys
    expect(report.stripped).toEqual([])
    expect(report.changed).toEqual([])
  })

  it('(b) defaults-only: every key the parse adds is a default DECLARED at that path, with that value', () => {
    const report = specParity(DOC_EXAMPLE, parsed(), ScaffoldControllerInputSchema)
    expect(report.added.map(a => a.path)).toEqual(expect.arrayContaining(['actions', 'customActions', 'versioned', 'codedEntity']))
    expect(report.undeclared).toEqual([])
  })

  it('secondary: generate() reads nothing a JSON round-trip of the parsed spec would lose', () => {
    const p = parsed()
    expect(generate(p)).toEqual(generate(JSON.parse(JSON.stringify(p))))
  })

  it('FIRES (a): a strip-mode copy of the schema without `fields[].required` is reported at both paths', () => {
    const stripping = z.object({
      ...ScaffoldControllerInputSchema.shape,
      fields: z.array(ControllerFieldSchema.omit({ required: true })),
    })
    const report = specParity(DOC_EXAMPLE, stripping.parse(DOC_EXAMPLE), stripping)
    expect(report.stripped).toEqual(['fields[0].required', 'fields[1].required'])
    expect(report.changed).toEqual([])
  })

  it('FIRES (b): a key injected after the parse, or a default applied with another value, is reported', () => {
    expect(specParity(DOC_EXAMPLE, { ...parsed(), derivedRoute: 'x' }, ScaffoldControllerInputSchema).undeclared).toEqual(['derivedRoute'])
    expect(specParity(DOC_EXAMPLE, { ...parsed(), versioned: true }, ScaffoldControllerInputSchema).undeclared).toEqual(['versioned'])
  })
})