import { left, right } from 'fp-ts/Either'
import { none, some } from 'fp-ts/Option'
import { Expr, ListExpr } from '../src/types'
import { jlog } from '../src/utils'
import { find } from '../src/eval'

describe('Eval', () => {
  it('basic evaluation', () => {
    const list = [0, 1, '2', 3, [4], 5]

    const liexp: ListExpr = [
      none,
      [ Expr.AnyNumber(null), Expr.Truthy(null) ],
      none,
    ]
    expect(find(liexp, list)).toEqual([1, 3, 5])

    const liexp2: ListExpr = [
      none,
      [ Expr.Falsey(null), Expr.Truthy(null) ],
      none,
    ]
    expect(find(liexp2, list)).toEqual([])
  })

  it('with groups', () => {
    const list = [0, 1, '2', 3, [4], 5]

    const liexp: ListExpr = [
      none,
      [ Expr.AnyItem(null), Expr.Group({ exprs: [ Expr.AnyNumber(null), Expr.Truthy(null)] }) ],
      none,
    ]
    expect(find(liexp, list)).toEqual([1, 3, 5])
  })
})