import { ReturnValues } from './types.js'
import { list, map, maybe, noCaseString, parse, seq, skip } from '../parser.js'
import { accessor, identifier, Symbol, ws } from './common.js'

const as = noCaseString('as')
const alias = seq(as, identifier)
const aliasId = seq(accessor, maybe(alias))

const keyword = noCaseString('return')

const params = map(
  values => new ReturnValues(values),
  seq(list(seq(Symbol.Comma, ws), aliasId))
)

export const statement = seq(skip(keyword), ws, params)