import { spawnSync } from 'node:child_process'

import { SetupError } from './errors.ts'

import { waitFor } from './probes.ts'

import * as p from './prompter.ts'

import { glyph, theme } from './theme.ts'

const INSTALL_HINTS = [

'install Docker Desktop: https://docker.com/products/docker-desktop',

`or OrbStack (lighter on macOS): ${theme.command('brew install orbstack')}`,

]

function daemonUp(): boolean {

return spawnSync('docker', ['info'], { stdio: 'ignore' }).status === 0

}

function installed(): boolean {

// Bun.which resolves PATH cross-platform (incl. PATHEXT on Windows); `which`

// is not a standard Windows command.

return Bun.which('docker') !== null

}

/**

* Returns whether the Docker daemon is available, offering to launch Docker

* Desktop (macOS) when it's installed but stopped. Never installs anything.

* With required=true, unavailability is a SetupError instead of false.

*/

export async function ensureDocker(required: boolean): Promise<boolean> {

if (daemonUp()) return true

if (!installed()) {

if (required) throw new SetupError('Docker is not installed.', INSTALL_HINTS)

return false

}

if (process.platform !== 'darwin') {

if (required) {

throw new SetupError('Docker is installed but the daemon is not running.', [

`start it: ${theme.command('sudo systemctl start docker')} (Linux)`,

])

}

return false

}

const launch = await p.confirm({

message: 'Docker is installed but not running — start Docker Desktop now?',

initialValue: true,

})

if (!launch) {

if (required) {

throw new SetupError('Docker is required for this mode.', [

'start Docker Desktop, then re-run the wizard',

])

}

return false

}

spawnSync('open', ['-a', 'Docker'], { stdio: 'ignore' })

const spin = p.spinner()

spin.start('Waiting for the Docker daemon…')

const up = await waitFor(async () => daemonUp(), 90_000, 2000)

spin.stop(up ? 'Docker is running' : `${glyph.fail} daemon did not come up`)

if (!up) {

throw new SetupError('Docker Desktop did not start within 90s.', [

'first-ever launch needs a GUI license acceptance — open Docker Desktop manually once, then re-run',

])

}

return true

}