/* eslint-disable no-undefined */

import test from 'ava'

import Decode from '../src/decode-json'
import { Optional, InField, AtIndex, ExpectString } from './error'

test('Decode.string', t => {
  t.is(Decode.string.decode('str').value, 'str')

  t.deepEqual(Decode.string.decode(undefined).error, ExpectString(undefined))
  t.deepEqual(Decode.string.decode(null).error, ExpectString(null))
  t.deepEqual(Decode.string.decode(true).error, ExpectString(true))
  t.deepEqual(Decode.string.decode(1).error, ExpectString(1))
  t.deepEqual(Decode.string.decode(1.1).error, ExpectString(1.1))
})

test('Decode.optional.string', t => {
  t.is(Decode.optional.string.decode(undefined).value, null)
  t.is(Decode.optional.string.decode(null).value, null)
  t.is(Decode.optional.string.decode('str').value, 'str')

  t.deepEqual(
    Decode.optional.string.decode(true).error,
    Optional(ExpectString(true))
  )
  t.deepEqual(Decode.optional.string.decode(1).error, Optional(ExpectString(1)))
  t.deepEqual(
    Decode.optional.string.decode(1.1).error,
    Optional(ExpectString(1.1))
  )
})

test('Decode.field().string', t => {
  // Decode<string>
  const _0 = Decode.field('_0').string

  t.is(_0.decode({ _0: 'str' }).value, 'str')

  t.deepEqual(_0.decode({ _0: null }).error, InField('_0', ExpectString(null)))
  t.deepEqual(_0.decode({ _0: 1 }).error, InField('_0', ExpectString(1)))
})

test('Decode.field().optional.string', t => {
  // Decode<string | null>
  const _0 = Decode.field('_0').optional.string

  t.is(_0.decode({ _0: null }).value, null)
  t.is(_0.decode({ _0: 'str' }).value, 'str')

  t.deepEqual(
    _0.decode({ _0: 1 }).error,
    InField('_0', Optional(ExpectString(1)))
  )
})

test('Decode.index().string', t => {
  // Decode<string>
  const _0 = Decode.index(1).string

  t.is(_0.decode(['', 'str']).value, 'str')

  t.deepEqual(_0.decode([0, null]).error, AtIndex(1, ExpectString(null)))
  t.deepEqual(_0.decode([0, 1]).error, AtIndex(1, ExpectString(1)))
})

test('Decode.index().optional.string', t => {
  // Decode<string | null>
  const _0 = Decode.index(1).optional.string

  t.is(_0.decode([0, null]).value, null)
  t.is(_0.decode(['', 'str']).value, 'str')

  t.deepEqual(_0.decode([0, 1]).error, AtIndex(1, Optional(ExpectString(1))))
})