import anyTest, { TestFn } from 'ava'
import { promises as fs } from 'fs'
import http from 'http'
import { AddressInfo } from 'net'
import path from 'path'
import proxyquire from 'proxyquire'
import { initializeStrings } from '../app/javascripts/Main/strings'
import { ensureDirectoryExists } from '../app/javascripts/Main/Utils/FileUtils'
import makeFakePaths from './fakePaths'
import { createTmpDir } from './testUtils'

const test = anyTest as TestFn<{
  server: http.Server
  host: string
}>

const tmpDir = createTmpDir(__filename)
const FakePaths = makeFakePaths(tmpDir.path)

let server: http.Server

const { createExtensionsServer, normalizeFilePath } = proxyquire('../app/javascripts/Main/ExtensionsServer', {
  './paths': {
    Paths: FakePaths,
    '@noCallThru': true,
  },
  electron: {
    app: {
      getPath() {
        return tmpDir.path
      },
    },
  },
  http: {
    createServer(...args: any) {
      server = http.createServer(...args)
      return server
    },
  },
})

const extensionsDir = path.join(tmpDir.path, 'Extensions')

initializeStrings('en')

const log = console.log
const error = console.error

test.before(async (t) => {
  /** Prevent the extensions server from outputting anything */
  // eslint-disable-next-line @typescript-eslint/no-empty-function
  // console.log = () => {}

  // eslint-disable-next-line @typescript-eslint/no-empty-function
  // console.error = () => {}

  await ensureDirectoryExists(extensionsDir)
  await new Promise((resolve) => {
    createExtensionsServer(resolve)
    t.context.server = server
    server.once('listening', () => {
      const { address, port } = server.address() as AddressInfo
      t.context.host = `http://${address}:${port}/`
      resolve(null)
    })
  })
})

test.after((t): Promise<any> => {
  /** Restore the console's functionality */
  console.log = log
  console.error = error

  return Promise.all([tmpDir.clean(), new Promise((resolve) => t.context.server.close(resolve))])
})

test('serves the files in the Extensions directory over HTTP', (t) => {
  const data = {
    name: 'Boxes',
    meter: {
      4: 4,
    },
    syncopation: true,
    instruments: ['Drums', 'Bass', 'Vocals', { name: 'Piano', type: 'Electric' }],
  }

  return fs.writeFile(path.join(extensionsDir, 'file.json'), JSON.stringify(data)).then(
    () =>
      new Promise((resolve) => {
        let serverData = ''
        http.get(t.context.host + 'Extensions/file.json').on('response', (response) => {
          response
            .setEncoding('utf-8')
            .on('data', (chunk) => {
              serverData += chunk
            })
            .on('end', () => {
              t.deepEqual(data, JSON.parse(serverData))
              resolve()
            })
        })
      }),
  )
})

test('does not serve files outside the Extensions directory', async (t) => {
  await new Promise((resolve) => {
    http.get(t.context.host + 'Extensions/../../../package.json').on('response', (response) => {
      t.is(response.statusCode, 500)
      resolve(true)
    })
  })
})

test('returns a 404 for files that are not present', async (t) => {
  await new Promise((resolve) => {
    http.get(t.context.host + 'Extensions/nothing').on('response', (response) => {
      t.is(response.statusCode, 404)
      resolve(true)
    })
  })
})

test('normalizes file paths to always point somewhere in the Extensions directory', (t) => {
  t.is(normalizeFilePath('/Extensions/test/yes', '127.0.0.1'), path.join(tmpDir.path, 'Extensions', 'test', 'yes'))
  t.is(
    normalizeFilePath('/Extensions/../../data/outside/the/extensions/directory'),
    path.join(tmpDir.path, 'Extensions', 'data', 'outside', 'the', 'extensions', 'directory'),
  )
})