// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict'

const tap = require('tap')
const silentConsole = {
  log() {},
  error() {}
}
const common = require('../common')
const assert = require('assert')
const { Readable } = require('../../lib/ours/index')
let len = 0
const chunks = new Array(10)
for (let i = 1; i <= 10; i++) {
  chunks[i - 1] = Buffer.allocUnsafe(i)
  len += i
}
const test = new Readable()
let n = 0
test._read = function (size) {
  const chunk = chunks[n++]
  setTimeout(function () {
    test.push(chunk === undefined ? null : chunk)
  }, 1)
}
test.on('end', thrower)
function thrower() {
  throw new Error('this should not happen!')
}
let bytesread = 0
test.on('readable', function () {
  const b = len - bytesread - 1
  const res = test.read(b)
  if (res) {
    bytesread += res.length
    silentConsole.error(`br=${bytesread} len=${len}`)
    setTimeout(next, 1)
  }
  test.read(0)
})
test.read(0)
function next() {
  // Now let's make 'end' happen
  test.removeListener('end', thrower)
  test.on('end', common.mustCall())

  // One to get the last byte
  let r = test.read()
  assert(r)
  assert.strictEqual(r.length, 1)
  r = test.read()
  assert.strictEqual(r, null)
}

/* replacement start */
process.on('beforeExit', (code) => {
  if (code === 0) {
    tap.pass('test succeeded')
  } else {
    tap.fail(`test failed - exited code ${code}`)
  }
})
/* replacement end */
