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// Adapted from https://github.com/vercel/next.js/blob/canary/packages/next/src/client/dev/error-overlay/websocket.ts

import type { WebSocketMessage } from '@vercel/turbopack-ecmascript-runtime/browser/dev/hmr-client/hmr-client'

let source: WebSocket
const eventCallbacks: ((msg: WebSocketMessage) => void)[] = []

// TODO: add timeout again
// let lastActivity = Date.now()

function getSocketProtocol(assetPrefix: string): string {
  let protocol = location.protocol

  try {
    // assetPrefix is a url
    protocol = new URL(assetPrefix).protocol
  } catch (_) {}

  return protocol === 'http:' ? 'ws' : 'wss'
}

export function addMessageListener(cb: (msg: WebSocketMessage) => void) {
  eventCallbacks.push(cb)
}

export function sendMessage(data: any) {
  if (!source || source.readyState !== source.OPEN) return
  return source.send(data)
}

export type HMROptions = {
  path: string
  assetPrefix: string
  timeout?: number
  log?: boolean
}

// This is not used by Next.js, but it is used by the standalone turbopack-cli
export function connectHMR(options: HMROptions) {
  const { timeout = 5 * 1000 } = options

  function init() {
    if (source) source.close()

    console.log('[HMR] connecting...')

    function handleOnline() {
      const connected = { type: 'turbopack-connected' as const }
      eventCallbacks.forEach((cb) => {
        cb(connected)
      })

      if (options.log) console.log('[HMR] connected')
      // lastActivity = Date.now()
    }

    function handleMessage(event: MessageEvent) {
      // lastActivity = Date.now()

      const message = {
        type: 'turbopack-message' as const,
        data: JSON.parse(event.data),
      }
      eventCallbacks.forEach((cb) => {
        cb(message)
      })
    }

    // let timer: NodeJS.Timeout

    function handleDisconnect() {
      source.close()
      setTimeout(init, timeout)
    }

    const { hostname, port } = location
    const protocol = getSocketProtocol(options.assetPrefix || '')
    const assetPrefix = options.assetPrefix.replace(/^\/+/, '')

    let url = `${protocol}://${hostname}:${port}${
      assetPrefix ? `/${assetPrefix}` : ''
    }`

    if (assetPrefix.startsWith('http')) {
      url = `${protocol}://${assetPrefix.split('://')[1]}`
    }

    source = new window.WebSocket(`${url}${options.path}`)
    source.onopen = handleOnline
    source.onerror = handleDisconnect
    source.onmessage = handleMessage
  }

  init()
}

	// Adapted from https://github.com/vercel/next.js/blob/canary/packages/next/src/client/dev/error-overlay/websocket.ts

	import type { WebSocketMessage } from '@vercel/turbopack-ecmascript-runtime/browser/dev/hmr-client/hmr-client'

	let source: WebSocket
	const eventCallbacks: ((msg: WebSocketMessage) => void)[] = []

	// TODO: add timeout again
	// let lastActivity = Date.now()

	function getSocketProtocol(assetPrefix: string): string {
	let protocol = location.protocol

	try {
	// assetPrefix is a url
	protocol = new URL(assetPrefix).protocol
	} catch (_) {}

	return protocol === 'http:' ? 'ws' : 'wss'
	}

	export function addMessageListener(cb: (msg: WebSocketMessage) => void) {
	eventCallbacks.push(cb)
	}

	export function sendMessage(data: any) {
	if (!source \|\| source.readyState !== source.OPEN) return
	return source.send(data)
	}

	export type HMROptions = {
	path: string
	assetPrefix: string
	timeout?: number
	log?: boolean
	}

	// This is not used by Next.js, but it is used by the standalone turbopack-cli
	export function connectHMR(options: HMROptions) {
	const { timeout = 5 * 1000 } = options

	function init() {
	if (source) source.close()

	console.log('[HMR] connecting...')

	function handleOnline() {
	const connected = { type: 'turbopack-connected' as const }
	eventCallbacks.forEach((cb) => {
	cb(connected)
	})

	if (options.log) console.log('[HMR] connected')
	// lastActivity = Date.now()
	}

	function handleMessage(event: MessageEvent) {
	// lastActivity = Date.now()

	const message = {
	type: 'turbopack-message' as const,
	data: JSON.parse(event.data),
	}
	eventCallbacks.forEach((cb) => {
	cb(message)
	})
	}

	// let timer: NodeJS.Timeout

	function handleDisconnect() {
	source.close()
	setTimeout(init, timeout)
	}

	const { hostname, port } = location
	const protocol = getSocketProtocol(options.assetPrefix \|\| '')
	const assetPrefix = options.assetPrefix.replace(/^\/+/, '')

	let url = `${protocol}://${hostname}:${port}${
	assetPrefix ? `/${assetPrefix}` : ''
	}`

	if (assetPrefix.startsWith('http')) {
	url = `${protocol}://${assetPrefix.split('://')[1]}`
	}

	source = new window.WebSocket(`${url}${options.path}`)
	source.onopen = handleOnline
	source.onerror = handleDisconnect
	source.onmessage = handleMessage
	}

	init()
	}