# All files / src koaMiddleware.coffee

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     koa = require 'koa'
    router = require './middleware/router'
    messageStore = require './middleware/messageStore'
    basicAuthentication = require './middleware/basicAuthentication'
    tlsAuthentication = require "./middleware/tlsAuthentication"
    rerunBypassAuthentication = require "./middleware/rerunBypassAuthentication"
    rerunBypassAuthorisation = require "./middleware/rerunBypassAuthorisation"
    rerunUpdateTransactionTask = require "./middleware/rerunUpdateTransactionTask"
    tcpBypassAuthentication = require "./middleware/tcpBypassAuthentication"
    retrieveTCPTransaction = require "./middleware/retrieveTCPTransaction"
    requestMatching = require './middleware/requestMatching'
    authorisation = require './middleware/authorisation'
    stats = require './stats'
    pollingBypassAuthorisation = require './middleware/pollingBypassAuthorisation'
    pollingBypassAuthentication = require './middleware/pollingBypassAuthentication'
    events = require './middleware/events'
    proxy = require './middleware/proxy'
    rewrite = require './middleware/rewriteUrls'
    config = require './config/config'
    config.authentication = config.get('authentication')
    getRawBody = require 'raw-body'
    tcpAdapter = require './tcpAdapter'
    Q = require "q"
    config.statsd = config.get 'statsd'

    application = config.get 'application'
    SDC = require 'statsd-client'
    os = require 'os'

    domain = "#{os.hostname()}.#{application.name}.appMetrics"
    sdc = new SDC config.statsd

    compress = require 'koa-compress'

    rawBodyReader = (next) ->
      startTime = new Date() if config.statsd.enabled
      body = yield getRawBody this.req,
        length: this.length,
        encoding: this.charset

      this.body = body if body
      sdc.timing "#{domain}.rawBodyReaderMiddleware", startTime if config.statsd.enabled
      yield next

    # Primary app

    exports.setupApp = (done) ->
      app = koa()

      # Basic authentication middleware
      if config.authentication.enableBasicAuthentication
        app.use basicAuthentication.koaMiddleware

      # TLS authentication middleware
      if config.authentication.enableMutualTLSAuthentication
        app.use tlsAuthentication.koaMiddleware

      app.use rawBodyReader

      # Request Matching middleware
      app.use requestMatching.koaMiddleware

      # Authorisation middleware
      app.use authorisation.koaMiddleware

      # Compress response on exit
      app.use compress(
        threshold: 8
        flush: require("zlib").Z_SYNC_FLUSH
      )

      # Proxy
      app.use proxy.koaMiddleware

      # Persist message middleware
      app.use messageStore.koaMiddleware

      # URL rewriting middleware
      app.use rewrite.koaMiddleware

      # Events
      app.use events.koaMiddleware

      # Call router
      app.use router.koaMiddleware

      done(app)

    # Rerun app that bypasses auth
    exports.rerunApp = (done) ->
      app = koa()

      app.use rawBodyReader

      # Rerun bypass authentication middlware
      app.use rerunBypassAuthentication.koaMiddleware

      # Rerun bypass authorisation middlware
      app.use rerunBypassAuthorisation.koaMiddleware

      # Update original transaction with rerunned transaction ID
      app.use rerunUpdateTransactionTask.koaMiddleware

      # Persist message middleware
      app.use messageStore.koaMiddleware

      # Authorisation middleware
      app.use authorisation.koaMiddleware

      # Events
      app.use events.koaMiddleware

      # Call router
      app.use router.koaMiddleware

      done(app)

    # App for TCP/TLS sockets
    exports.tcpApp = (done) ->
      app = koa()

      app.use rawBodyReader
      app.use retrieveTCPTransaction.koaMiddleware

      # TCP bypass authentication middlware
      app.use tcpBypassAuthentication.koaMiddleware

      # Proxy
      app.use proxy.koaMiddleware

      # Persist message middleware
      app.use messageStore.koaMiddleware

      # Events
      app.use events.koaMiddleware

      # Call router
      app.use router.koaMiddleware

      done(app)

    # App used by scheduled polling
    exports.pollingApp = (done) ->
      app = koa()

      app.use rawBodyReader

      # Polling bypass authentication middlware
      app.use pollingBypassAuthentication.koaMiddleware

      # Polling bypass authorisation middleware
      app.use pollingBypassAuthorisation.koaMiddleware

      # Persist message middleware
      app.use messageStore.koaMiddleware

      # Events
      app.use events.koaMiddleware

      # Call router
      app.use router.koaMiddleware

      done(app)