const chai = require('chai')
const expect = chai.expect
const mock = require('mock-fs')
const request = require('supertest')
const express = require('express')
const Liquid = require('..')

describe('engine#express()', function () {
  var app, engine

  beforeEach(function () {
    app = express()
    engine = Liquid({
      root: '/root',
      extname: '.html'
    })

    app.set('view engine', 'html')
    app.engine('html', engine.express())

    app.get('/name', (req, res) => res.render('name', {
      name: 'harttle'
    }))
    app.get('/include/:file', (req, res) => res.render('include', {
      file: req.params.file
    }))
  })
  after(function () {
    mock.restore()
  })
  it('should render express views', function (done) {
    mock({ '/views/name.html': 'My name is {{name}}.' })
    app.set('views', ['/views'])
    request(app).get('/name')
      .expect('My name is harttle.')
      .expect(200, done)
  })
  it('should pass error when file not found', function (done) {
    var view = {
      root: []
    }
    var file = '/not-exist.html'
    var ctx = {}
    engine.express().call(view, file, ctx, function (err) {
      try {
        expect(err.code).to.equal('ENOENT')
        expect(err.message).to.match(/Failed to lookup/)
        done()
      } catch (e) {
        done(e)
      }
    })
  })
  it('should respect root option when lookup', function (done) {
    mock({
      '/root/foo.html': 'foo',
      '/views/include.html': '{% include file %}'
    })
    app.set('views', ['/views'])
    request(app).get('/include/foo')
      .expect('foo')
      .expect(200, done)
  })
  it('should respect express views (Array) when lookup', function (done) {
    mock({
      '/views/include.html': '{% include file %}',
      '/partials/bar.html': 'bar'
    })
    app.set('views', ['/views', '/partials'])
    request(app).get('/include/bar')
      .expect('bar')
      .expect(200, done)
  })
  it('should respect express views (String) when lookup', function (done) {
    mock({
      '/views/include.html': '{% include file %}',
      '/views/bar.html': 'bar'
    })
    app.set('views', '/views')
    request(app).get('/include/bar')
      .expect('bar')
      .expect(200, done)
  })
  it('should respect express views (Undefined) when lookup', function (done) {
    var files = {}
    files[process.cwd() + '/views/include.html'] = '{% include file %}'
    files[process.cwd() + '/views/bar.html'] = 'bar'
    mock(files)

    request(app).get('/include/bar')
      .expect('bar')
      .expect(200, done)
  })
})