/* ------------------------------------------
 * This module tests the compiled TypeScript files
 * -------------------------------------------- */
import plugins = require('./mod02.plugins')
import paths = require('../npmts.paths')

import * as q from 'smartq'

// interfaces
import { INpmtsConfig } from '../npmts.config'
import { Smartfile } from 'smartfile'

let testTypeScriptConfig = {
  target: 'ES5',
  emitDecoratorMetadata: true,
  experimentalDecorators: true,
  lib: [
    'DOM',
    'ESNext'
  ]
}

/**
 * runs mocha
 * @returns INpmtsConfig
 */
let tap = function (configArg: INpmtsConfig) {
  let done = q.defer()

  /**
   * the TabBuffer for npmts
   */
  let npmtsTapBuffer = new plugins.tapbuffer.TabBuffer()

  npmtsTapBuffer.setConfig(configArg.testConfig)

  /**
   * handle the testable files
   */
  let testableFilesSmartstream = new plugins.smartstream.Smartstream([
    plugins.smartgulp.src([ plugins.path.join(paths.cwd, './ts/**/*.ts') ]),
    plugins.gulpSourcemaps.init(),
    plugins.gulpTypeScript(testTypeScriptConfig),
    plugins.gulpSourcemaps.write(),
    npmtsTapBuffer.pipeTestableFiles(),
    plugins.smartstream.cleanPipe()
  ])

  /**
   * handle the test files
   */
  let testFilesSmartstream = new plugins.smartstream.Smartstream([
    plugins.smartgulp.src([ plugins.path.join(paths.cwd, 'test/*.ts') ]),
    plugins.gulpSourcemaps.init(),
    plugins.gulpTypeScript(testTypeScriptConfig),
    plugins.gulpSourcemaps.write(),
    npmtsTapBuffer.pipeTestFiles(),
    plugins.smartstream.cleanPipe()
  ])

  // lets run the smartstream
  Promise.all([
    testableFilesSmartstream.run(),
    testFilesSmartstream.run()
  ]).then(
    async () => {
      configArg.runData.coverageLcovInfo = await npmtsTapBuffer.runTests()
      done.resolve(configArg)
    }, (err) => {
      plugins.beautylog.error('Tests failed!')
      console.log(err)
      if (configArg.watch) {
        done.resolve(configArg)
      } else {
        process.exit(1)
      }
    })

  return done.promise
}

let handleCoverageData = async (configArg: INpmtsConfig) => {
  let coverageResult: number = 0 // the coverage in percent
  if (configArg.runData.coverageLcovInfo) {
    coverageResult = await plugins.smartcov.get.percentageFromLcovString(
      configArg.runData.coverageLcovInfo,
      2
    )
  } else {
    plugins.beautylog.warn('Hey... Did your tests import and use your module that you are trying to test?')
  }

  if (coverageResult >= configArg.coverageTreshold) {
    plugins.beautylog.ok(
      `${(coverageResult).toString()}% `
      + `coverage exceeds your treshold of `
      + `${configArg.coverageTreshold.toString()}%`
    )
  } else {
    plugins.beautylog.warn(
      `${(coverageResult).toString()}% `
      + `coverage fails your treshold of `
      + `${configArg.coverageTreshold.toString()}%`
    )
    plugins.beautylog.error('exiting due to coverage failure')
    if (!configArg.watch) { process.exit(1) }
  }
  return configArg
}

export let run = function (configArg: INpmtsConfig) {
  let done = q.defer<INpmtsConfig>()
  let config = configArg
  if (config.test === true) {
    plugins.beautylog.ora.text('now starting tests')
    plugins.beautylog.ora.end()
    plugins.beautylog.log('ready for tapbuffer:')
    if (configArg.testConfig.coverage) {
      tap(config)
        .then(handleCoverageData)
        .then(() => {
          done.resolve(config)
        }).catch(err => { console.log(err) })
    } else {
      tap(config)
        .then(() => {
          done.resolve(config)
        }).catch(err => { console.log(err) })
    }

  } else {
    plugins.beautylog.ora.end()
    done.resolve(config)
  }
  return done.promise
}