import assert from 'node:assert/strict'
import { spawnSync } from 'node:child_process'
import { chmodSync, existsSync, mkdirSync, readFileSync, realpathSync, symlinkSync } from 'node:fs'
import { dirname, join } from 'node:path'
import test from 'node:test'
import { fileURLToPath } from 'node:url'
import { cleanup, tempDir, write } from './helpers.mjs'

const here = dirname(fileURLToPath(import.meta.url))
const script = join(here, '..', 'install.sh')
const root = join(here, '..', '..')
const agentsSkills = join(root, '.agents', 'skills')
const NAMES = [
  'openspec-apply-change',
  'openspec-archive-change',
  'openspec-explore',
  'openspec-propose',
  'openspec-sync-specs',
  'openspec-update-change',
]

test('repository ships six agents skills for DSH', () => {
  assert.equal(readFileSync(join(agentsSkills, '.openspec-target'), 'utf8').trim(), 'agents')
  for (const name of NAMES) {
    const file = join(agentsSkills, name, 'SKILL.md')
    assert.ok(existsSync(file), `${name}/SKILL.md is missing`)
    const text = readFileSync(file, 'utf8')
    assert.match(text, new RegExp(`^name: ${name}$`, 'm'), `${name}: frontmatter name must match the dir`)
    assert.match(text, /description: .*openspec/i, `${name}: description must mention openspec`)
  }
})

test('install.sh --check reports the openspec CLI and the agents skills', () => {
  const home = tempDir()
  try {
    const bin = join(home, 'bin')
    write(join(bin, 'openspec'), '#!/bin/sh\n[ "$1" = "--version" ] && echo 1.13.1\nexit 0\n')
    chmodSync(join(bin, 'openspec'), 0o755)
    const env = { ...process.env, HOME: home, DSH_HOME: join(home, '.dsh'), PATH: `${bin}:${process.env.PATH}` }
    const run = spawnSync('bash', [script, '--check'], { env, encoding: 'utf8' })
    assert.equal(run.status, 0, run.stderr)
    assert.match(run.stdout, /ok: openspec 1\.13\.1/)
    assert.match(run.stdout, /ok: openspec agents skills \(/)
  } finally {
    cleanup(home)
  }
})

test('install.sh --check warns but does not fail without the openspec CLI', () => {
  const home = tempDir()
  try {
    const bin = join(home, 'bin')
    mkdirSync(bin, { recursive: true })
    symlinkSync(process.execPath, join(bin, 'node'))
    // openspec ставится в /opt/homebrew/bin; здесь только системные каталоги — CLI не найден
    const env = {
      ...process.env,
      HOME: home,
      DSH_HOME: join(home, '.dsh'),
      PATH: `${bin}:/usr/bin:/bin:/usr/sbin:/sbin`,
    }
    const run = spawnSync('bash', [script, '--check'], { env, encoding: 'utf8' })
    assert.equal(run.status, 0, run.stderr)
    assert.match(run.stdout + run.stderr, /WARN: openspec not found/)
  } finally {
    cleanup(home)
  }
})

function fakeOpenspec(dir, log) {
  const bin = join(dir, 'bin')
  write(join(bin, 'openspec'), `#!/bin/sh\necho "$PWD $@" >> ${JSON.stringify(log)}\nexit 0\n`)
  chmodSync(join(bin, 'openspec'), 0o755)
  return bin
}

test('--openspec adds the agents adapter to an existing OpenSpec project', () => {
  const home = tempDir()
  try {
    const project = join(home, 'project')
    mkdirSync(join(project, 'openspec'), { recursive: true })
    // macOS: os.tmpdir() идёт через симлинк /var -> /private/var, а $PWD в шелле — уже реальный путь
    const realProject = realpathSync(project)
    const log = join(home, 'calls.log')
    const bin = fakeOpenspec(home, log)
    const env = { ...process.env, HOME: home, DSH_HOME: join(home, '.dsh'), PATH: `${bin}:${process.env.PATH}` }
    const run = spawnSync('bash', [script, '--openspec'], { cwd: project, env, encoding: 'utf8' })
    assert.equal(run.status, 0, run.stderr)
    assert.match(run.stdout, /ok: openspec agents adapter in /)
    assert.match(readFileSync(log, 'utf8'), new RegExp(`^${realProject} init --tools agents$`, 'm'))
  } finally {
    cleanup(home)
  }
})

test('--openspec refuses a project without an openspec root', () => {
  const home = tempDir()
  try {
    const project = join(home, 'plain')
    mkdirSync(project, { recursive: true })
    const log = join(home, 'calls.log')
    const bin = fakeOpenspec(home, log)
    const env = { ...process.env, HOME: home, DSH_HOME: join(home, '.dsh'), PATH: `${bin}:${process.env.PATH}` }
    const run = spawnSync('bash', [script, '--openspec'], { cwd: project, env, encoding: 'utf8' })
    assert.notEqual(run.status, 0)
    assert.match(run.stdout + run.stderr, /has no openspec\/ root/)
    assert.equal(existsSync(log), false, 'openspec must not run in a non-OpenSpec project')
    assert.equal(existsSync(join(project, 'openspec')), false)
  } finally {
    cleanup(home)
  }
})

test('--openspec fails when openspec init fails', () => {
  const home = tempDir()
  try {
    const project = join(home, 'project')
    mkdirSync(join(project, 'openspec'), { recursive: true })
    const bin = join(home, 'bin')
    write(join(bin, 'openspec'), '#!/bin/sh\nexit 1\n')
    chmodSync(join(bin, 'openspec'), 0o755)
    const env = { ...process.env, HOME: home, DSH_HOME: join(home, '.dsh'), PATH: `${bin}:${process.env.PATH}` }
    const run = spawnSync('bash', [script, '--openspec'], { cwd: project, env, encoding: 'utf8' })
    assert.notEqual(run.status, 0)
    assert.doesNotMatch(run.stdout, /ok: openspec agents adapter/)
    assert.match(run.stderr, /FAIL/)
  } finally {
    cleanup(home)
  }
})

test('--openspec fails without the openspec CLI', () => {
  const home = tempDir()
  try {
    const project = join(home, 'project')
    mkdirSync(join(project, 'openspec'), { recursive: true })
    const bin = join(home, 'bin')
    mkdirSync(bin, { recursive: true })
    symlinkSync(process.execPath, join(bin, 'node'))
    // openspec ставится в /opt/homebrew/bin; здесь только системные каталоги — CLI не найден
    const env = {
      ...process.env,
      HOME: home,
      DSH_HOME: join(home, '.dsh'),
      PATH: `${bin}:/usr/bin:/bin:/usr/sbin:/sbin`,
    }
    const run = spawnSync('bash', [script, '--openspec'], { cwd: project, env, encoding: 'utf8' })
    assert.notEqual(run.status, 0)
    assert.match(run.stdout + run.stderr, /FAIL: openspec CLI not found/)
  } finally {
    cleanup(home)
  }
})