import fsSync from 'fs'
import http from 'http'
import fs from 'fs/promises'
import formidable from 'formidable'
import { Eltro as t, assert, stub } from 'eltro'
import { setTimeout } from 'timers/promises'
import { Flaska, FormidableHandler, FileResponse } from '../flaska.mjs'
import Client from './client.mjs'

const port = 51025
const log = {
  fatal: stub(),
  error: stub(),
  warn: stub(),
  info: stub(),
  debug: stub(),
  trace: stub(),
  log: stub(),
}
const flaska = new Flaska({ log })
const client = new Client(port)

let file = null
let uploaded = []

flaska.after(function(ctx) {
  if (ctx.aborted) return
  ctx.log.info(ctx.status)
})

flaska.get('/', function(ctx) {
  ctx.body = { status: true }
})
flaska.get('/timeout', function(ctx) {
  return new Promise(function() {})
})
flaska.get('/file', function(ctx) {
  file = fsSync.createReadStream('./test/test.png')
  ctx.body = file
})
flaska.get('/filehandle', function(ctx) {
  return fs.stat('./test/test.txt').then(function(stat) {
    ctx.body = new FileResponse('./test/test.txt', stat)
  })
})
flaska.post('/file/upload', FormidableHandler(formidable, {
  uploadDir: './test/upload'
}), function(ctx) {
  uploaded.push(ctx.req.file)
  ctx.body = ctx.req.file
})
flaska.post('/file/upload/many', FormidableHandler(formidable, {
  uploadDir: './test/upload',
}), function(ctx) {
  uploaded.push(ctx.req.files.herp)
  uploaded.push(ctx.req.files.derp)
  ctx.body = ctx.req.files
})
flaska.get('/file/leak', function(ctx) {
  file = fsSync.createReadStream('./test/test.png')
  ctx.body = file

  return new Promise(function() {})
})

function reset() {
  log.fatal.reset()
  log.error.reset()
  log.warn.reset()
  log.info.reset()
  log.debug.reset()
  log.trace.reset()
  log.log.reset()
}

t.before(function() {
  return flaska.listenAsync(port)
})

t.describe('/', function() {
  t.test('should return status true', function() {
    return client.get('/').then(function(body) {
      assert.deepEqual(body, { status: true })
    })
  })
})

t.describe('/timeout', function() {
  t.test('server should handle timeout', async function() {
    reset()

    let err = await assert.isRejected(client.customRequest('GET', '/timeout', null, { timeout: 20 }))

    assert.match(err.message, /timed out/)
    assert.notOk(log.error.called)
    assert.notOk(log.info.called)
  })
})

t.describe('/file', function() {
  t.test('server should pipe', async function() {
    log.error.reset()

    let target = fsSync.createWriteStream('./test_tmp.png')

    await client.customRequest('GET', '/file', null, { toPipe: target })

    while (!target.closed && !file.closed) {
      await setTimeout(10)
    }

    assert.ok(target.closed)
    assert.ok(file.closed)

    let [statSource, statTarget] = await Promise.all([
      fs.stat('./test/test.png'),
      fs.stat('./test_tmp.png'),
    ])

    assert.strictEqual(statSource.size, statTarget.size)
  })
  t.test('server should autoclose body file handles on errors', async function() {
    reset()

    file = null

    let req = await client.customRequest('GET', '/file/leak', null, { returnRequest: true })

    req.end()

    while (!file) {
      await setTimeout(10)
    }

    assert.ok(file)
    assert.notOk(file.closed)

    req.destroy()

    while (!file.closed) {
      await setTimeout(10)
    }

    assert.strictEqual(log.error.callCount, 0)
    assert.strictEqual(log.info.callCount, 0)

    assert.ok(file.closed)
  })
})

t.describe('/filehandle', function() {
  const agent = new http.Agent({
    keepAlive: true,
    maxSockets: 1,
    keepAliveMsecs: 3000,
  })

  t.test('server should send correctly', async function() {
    log.error.reset()

    let res = await client.customRequest('GET', '/filehandle', null, { getRaw: true, agent: agent })
    assert.strictEqual(res.status, 200)
    assert.strictEqual(res.headers['content-length'], '11')
    assert.strictEqual(res.headers['content-type'], 'text/plain')
    assert.match(res.headers['etag'], /\"\d+-11-\d+"/)
    assert.ok(res.headers['last-modified'])
    let d = new Date(Date.parse(res.headers['last-modified']))
    let etag = res.headers['etag']
    assert.ok(d.getTime())

    res = await client.customRequest('GET', '/filehandle', null, { getRaw: true, agent: agent,
      headers: {
        'If-Modified-Since': d.toUTCString()
      },
    })
    assert.strictEqual(res.status, 304)
    assert.strictEqual(res.data, '')
    assert.strictEqual(res.headers['etag'], etag)

    res = await client.customRequest('GET', '/filehandle', null, { getRaw: true, agent: agent,
      headers: {
        'If-None-Match': etag
      },
    })
    assert.strictEqual(res.status, 304)
    assert.strictEqual(res.data, '')
    assert.strictEqual(res.headers['etag'], etag)

    res = await client.customRequest('GET', '/filehandle', null, { getRaw: true, agent: agent,
      headers: {
        'Range': 'bytes=2-5'
      },
    })
    assert.strictEqual(res.status, 206)
    assert.strictEqual(res.data, 'llo ')
    assert.strictEqual(res.headers['content-length'], '4')


    res = await client.customRequest('GET', '/filehandle', null, { getRaw: true, agent: agent,
      headers: {
        'Range': 'bytes=0-0'
      },
    })
    assert.strictEqual(res.status, 206)
    assert.strictEqual(res.data, 'H')
    assert.strictEqual(res.headers['content-length'], '1')
  })

  t.after(function() {
    agent.destroy()
  })
})

t.describe('/file/upload', function() {
  t.test('server should upload file', async function() {
    let res = await client.upload('/file/upload', './test/test.png')

    let [statSource, statTarget] = await Promise.all([
      fs.stat('./test/test.png'),
      fs.stat(res.path),
    ])

    assert.strictEqual(statSource.size, statTarget.size)
    assert.strictEqual(statSource.size, res.size)
    assert.strictEqual(res.type, 'image/png')
  })
  t.test('server should have correct type', async function() {
    let res = await client.upload('/file/upload', './test/test.jpg')

    let [statSource, statTarget] = await Promise.all([
      fs.stat('./test/test.jpg'),
      fs.stat(res.path),
    ])

    assert.strictEqual(statSource.size, statTarget.size)
    assert.strictEqual(statSource.size, res.size)
    assert.strictEqual(res.type, 'image/jpeg')
  })
  t.test('server should use type from user', async function() {
    const assertType = 'some/test/here'
    let res = await client.upload('/file/upload', './test/test.jpg', 'POST', {}, assertType)

    let [statSource, statTarget] = await Promise.all([
      fs.stat('./test/test.jpg'),
      fs.stat(res.path),
    ])

    assert.strictEqual(statSource.size, statTarget.size)
    assert.strictEqual(statSource.size, res.size)
    assert.strictEqual(res.type, assertType)
  })
  t.test('server should attempt to correct type if type is application/octet-stream', async function() {
    const assertNotType = 'application/octet-stream'
    let res = await client.upload('/file/upload', './test/test.jpg', 'POST', {}, assertNotType)

    let [statSource, statTarget] = await Promise.all([
      fs.stat('./test/test.jpg'),
      fs.stat(res.path),
    ])

    assert.strictEqual(statSource.size, statTarget.size)
    assert.strictEqual(statSource.size, res.size)
    assert.notStrictEqual(res.type, assertNotType)
    assert.strictEqual(res.type, 'image/jpeg')
  })
  t.test('server fall back to type application/octet-stream if unknown', async function() {
    let res = await client.upload('/file/upload', './test/test.gibberish')

    let [statSource, statTarget] = await Promise.all([
      fs.stat('./test/test.gibberish'),
      fs.stat(res.path),
    ])

    assert.strictEqual(statSource.size, statTarget.size)
    assert.strictEqual(statSource.size, res.size)
    assert.strictEqual(res.type, 'application/octet-stream')

    res = await client.upload('/file/upload', './test/test.gibberish', 'POST', {}, 'application/octet-stream')
    assert.strictEqual(res.type, 'application/octet-stream')
  })
})

t.describe('/file/upload/many', function() {
  t.test('server should upload file', async function() {
    let res = await client.upload('/file/upload/many', {
      herp: './test/test.jpg',
      derp: './test/test.png',
    })

    let [statSourcePng, statSourceJpg, statTargetHerp, statTargetDerp] = await Promise.all([
      fs.stat('./test/test.png'),
      fs.stat('./test/test.jpg'),
      fs.stat(res.herp.path),
      fs.stat(res.derp.path),
    ])

    assert.strictEqual(statSourceJpg.size, statTargetHerp.size)
    assert.strictEqual(statSourceJpg.size, res.herp.size)
    assert.strictEqual(statSourcePng.size, statTargetDerp.size)
    assert.strictEqual(statSourcePng.size, res.derp.size)
  })
})

t.describe('HEAD', function() {
  const agent = new http.Agent({
    keepAlive: true,
    maxSockets: 1,
    keepAliveMsecs: 3000,
  })

  t.describe('/file', function() {
    t.test('server return HEAD for pipes', async function() {
      log.error.reset()

      let res = await client.customRequest('HEAD', '/file', null, { getRaw: true, agent: agent })

      while (!file.closed) {
        await setTimeout(10)
      }

      assert.ok(file.closed)

      let statSource = await fs.stat('./test/test.png')

      assert.strictEqual(res.data, '')
      assert.strictEqual(res.headers['content-type'], 'image/png')
      assert.notOk(res.headers['content-length'])
    })
    t.test('server should autoclose body file handles on errors', async function() {
      reset()

      file = null

      let req = await client.customRequest('HEAD', '/file/leak', null, { returnRequest: true })

      req.end()

      while (!file) {
        await setTimeout(10)
      }

      assert.ok(file)
      assert.notOk(file.closed)

      req.destroy()

      while (!file.closed) {
        await setTimeout(10)
      }

      assert.strictEqual(log.error.callCount, 0)
      assert.strictEqual(log.info.callCount, 0)

      assert.ok(file.closed)
    })
  })

  t.describe('/filehandle', function() {
    t.test('server should send correctly', async function() {
      log.error.reset()

      let res = await client.customRequest('HEAD', '/filehandle', null, { getRaw: true, agent: agent })
      assert.strictEqual(res.status, 200)
      assert.strictEqual(res.headers['content-length'], '11')
      assert.strictEqual(res.headers['content-type'], 'text/plain')
      assert.match(res.headers['etag'], /\"\d+-11-\d+"/)
      assert.ok(res.headers['last-modified'])
      let d = new Date(Date.parse(res.headers['last-modified']))
      let etag = res.headers['etag']
      assert.ok(d.getTime())
      assert.strictEqual(res.data, '')

      res = await client.customRequest('HEAD', '/filehandle', null, { getRaw: true, agent: agent,
        headers: {
          'If-Modified-Since': d.toUTCString()
        },
      })
      assert.strictEqual(res.status, 304)
      assert.strictEqual(res.data, '')
      assert.strictEqual(res.headers['etag'], etag)

      res = await client.customRequest('HEAD', '/filehandle', null, { getRaw: true, agent: agent,
        headers: {
          'If-None-Match': etag
        },
      })
      assert.strictEqual(res.status, 304)
      assert.strictEqual(res.data, '')
      assert.strictEqual(res.headers['etag'], etag)

      res = await client.customRequest('HEAD', '/filehandle', null, { getRaw: true, agent: agent,
        headers: {
          'Range': 'bytes=2-5'
        },
      })
      assert.strictEqual(res.status, 206)
      assert.strictEqual(res.data, '')
      assert.strictEqual(res.headers['content-length'], '4')


      res = await client.customRequest('HEAD', '/filehandle', null, { getRaw: true, agent: agent,
        headers: {
          'Range': 'bytes=0-0'
        },
      })
      assert.strictEqual(res.status, 206)
      assert.strictEqual(res.data, '')
      assert.strictEqual(res.headers['content-length'], '1')
    })

    t.after(function() {
      agent.destroy()
    })
  })
})

t.after(function() {
  return Promise.all([
    fs.rm('./test_tmp.png', { force: true }),
    Promise.all(uploaded.map(file => fs.rm(file.path, { force: true }))),
    flaska.closeAsync(),
  ])
})