// 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, Writable } = require('../../lib/ours/index')
const EE = require('events').EventEmitter
function runTest(highWaterMark, objectMode, produce) {
  const old = new EE()
  const r = new Readable({
    highWaterMark,
    objectMode
  })
  assert.strictEqual(r, r.wrap(old))
  r.on('end', common.mustCall())
  old.pause = function () {
    old.emit('pause')
    flowing = false
  }
  old.resume = function () {
    old.emit('resume')
    flow()
  }

  // Make sure pause is only emitted once.
  let pausing = false
  r.on('pause', () => {
    assert.strictEqual(pausing, false)
    pausing = true
    process.nextTick(() => {
      pausing = false
    })
  })
  let flowing
  let chunks = 10
  let oldEnded = false
  const expected = []
  function flow() {
    flowing = true
    while (flowing && chunks-- > 0) {
      const item = produce()
      expected.push(item)
      old.emit('data', item)
    }
    if (chunks <= 0) {
      oldEnded = true
      old.emit('end')
    }
  }
  const w = new Writable({
    highWaterMark: highWaterMark * 2,
    objectMode
  })
  const written = []
  w._write = function (chunk, encoding, cb) {
    written.push(chunk)
    setTimeout(cb, 1)
  }
  w.on(
    'finish',
    common.mustCall(function () {
      performAsserts()
    })
  )
  r.pipe(w)
  flow()
  function performAsserts() {
    assert(oldEnded)
    assert.deepStrictEqual(written, expected)
  }
}
runTest(100, false, function () {
  return Buffer.allocUnsafe(100)
})
runTest(10, false, function () {
  return Buffer.from('xxxxxxxxxx')
})
runTest(1, true, function () {
  return {
    foo: 'bar'
  }
})
const objectChunks = [
  5,
  'a',
  false,
  0,
  '',
  'xyz',
  {
    x: 4
  },
  7,
  [],
  555
]
runTest(1, true, function () {
  return objectChunks.shift()
})

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