import * as fs from './fs-impl'
import * as path from 'path'
import { mkdtempSync, writeFileSync, symlinkSync, rmSync } from 'fs'
import { tmpdir } from 'os'

const { join } = path

describe('fs-impl', function () {
  describe('.resolve()', function () {
    it('should resolve based on root', async function () {
      const filepath = fs.resolve('/foo', 'bar.html', '.liquid')
      const expected = path.resolve('/foo/bar.html')
      return expect(filepath).toBe(expected)
    })
    it('should add extension if it has no extension', async function () {
      const filepath = fs.resolve('/foo', 'bar', '.liquid')
      const expected = path.resolve('/foo/bar.liquid')
      return expect(filepath).toBe(expected)
    })
  })
  describe('.existsSync', () => {
    it('should resolve as false if not exists', () => {
      expect(fs.existsSync('/foo/bar')).toBeFalsy()
    })
    it('should resolve as true if exists', () => {
      expect(fs.existsSync(__filename)).toBeTruthy()
    })
  })
  describe('.exists', () => {
    it('should resolve as false if not exists', async () => {
      const result = await fs.exists('/foo/bar')
      expect(result).toBeFalsy()
    })
    it('should resolve as true if exists', async () => {
      const result = await fs.exists(__filename)
      expect(result).toBeTruthy()
    })
  })
  describe('.readFileSync', function () {
    it('should throw when not exist', function () {
      return expect(() => fs.readFileSync('/foo/bar')).toThrow('ENOENT')
    })
    it('should read content if exists', function () {
      const content = fs.readFileSync(__filename)
      expect(content).toContain('should read content if exists')
    })
  })
  describe('.readFile', function () {
    it('should throw when not exist', function () {
      return expect(fs.readFile('/foo/bar')).rejects.toHaveProperty('message', expect.stringMatching('ENOENT'))
    })
    it('should read content if exists', async function () {
      const content = await fs.readFile(__filename)
      expect(content).toContain('should read content if exists')
    })
  })
  describe('.contains()', () => {
    const canSymlink = process.platform !== 'win32'
    ;(canSymlink ? it : it.skip)('should return false when path is a symlink to outside root', async () => {
      const root = mkdtempSync(join(tmpdir(), 'liquid-contains-'))
      const outside = join(tmpdir(), `secret-${Date.now()}.liquid`)
      writeFileSync(outside, 'x')
      const link = join(root, 'link.liquid')
      symlinkSync(outside, link)
      try {
        expect(await fs.contains(root, link)).toBe(false)
      } finally {
        rmSync(root, { recursive: true, force: true })
        rmSync(outside, { force: true })
      }
    })
  })
  describe('.containsSync()', () => {
    const canSymlink = process.platform !== 'win32'
    ;(canSymlink ? it : it.skip)('should return false when path is a symlink to outside root', () => {
      const root = mkdtempSync(join(tmpdir(), 'liquid-contains-'))
      const outside = join(tmpdir(), `secret-${Date.now()}.liquid`)
      writeFileSync(outside, 'x')
      const link = join(root, 'link.liquid')
      symlinkSync(outside, link)
      try {
        expect(fs.containsSync(root, link)).toBe(false)
      } finally {
        rmSync(root, { recursive: true, force: true })
        rmSync(outside, { force: true })
      }
    })
  })
})