import fs from 'fs'
import path from 'path'

import { parse } from '../src'
import { loadYamlCases } from './loaders/yaml'

const fixturesDir = path.resolve(__dirname, 'fixtures')
const maybe = (condition: Boolean) => condition ? test : test.skip

describe('parsing into intermediate representation using grammar', () => {
  test('block.tlb can be parsed', () => {
    expect.hasAssertions()

    const input = fs.readFileSync(
      path.resolve(fixturesDir, 'tlb', 'block.tlb'),
      'utf-8',
    )
    const parsed = parse(input)

    expect(parsed.shortMessage).toBe(undefined)
    expect(parsed.succeeded()).toBe(true)
  })

  for (
    let caseDef of loadYamlCases(
      fixturesDir,
      'grammar',
      'invalid-one-liners.yml',
    )
  ) {
    maybe(!caseDef.skip)(`Generated invalid example: ${caseDef.case}`, () => {
      expect.hasAssertions()

      const parsed = parse(caseDef.code)

      if (caseDef.error !== undefined) {
        expect(parsed.shortMessage).toEqual(caseDef.error)
      } else if (caseDef.errorStart !== undefined) {
        expect(parsed.shortMessage).toMatch(caseDef.errorStart)
      }
      expect(parsed.succeeded()).toBe(false)
    })
  }

  for (
    let caseDef of loadYamlCases(
      fixturesDir,
      'grammar',
      'valid-one-liners.yml',
    )
  ) {
    test(`Generated valid example: ${caseDef.case}`, () => {
      expect.hasAssertions()

      const parsed = parse(caseDef.code)

      expect(parsed.shortMessage).toBe(undefined)
      expect(parsed.succeeded()).toBe(true)
    })
  }
})