import * as plugins from './tapbundle.plugins'

import { TapTest, ITestFunction } from './tapbundle.classes.taptest'
import { TapWrap, ITapWrapFunction } from './tapbundle.classes.tapwrap'
export class Tap {

  /**
   * skip a test
   */
  skip = {
    test: (descriptionArg: string, functionArg: ITestFunction) => {
      console.log(`skipped test: ${descriptionArg}`)
    }
  }

  private _tapTests: TapTest[] = []

  /**
   * Normal test function, will run one by one
   * @param testDescription - A description of what the test does
   * @param testFunction - A Function that returns a Promise and resolves or rejects
   */
  async test(testDescription: string, testFunction: ITestFunction) {
    let localTest = new TapTest({
      description: testDescription,
      testFunction: testFunction,
      parallel: false
    })
    this._tapTests.push(localTest)
    return localTest
  }

  /**
   * wraps function
   */
  wrap(functionArg: ITapWrapFunction) {
    return new TapWrap(functionArg)
  }

  /**
   * A parallel test that will not be waited for before the next starts.
   * @param testDescription - A description of what the test does
   * @param testFunction - A Function that returns a Promise and resolves or rejects
   */
  testParallel(testDescription: string, testFunction: ITestFunction) {
    this._tapTests.push(new TapTest({
      description: testDescription,
      testFunction: testFunction,
      parallel: true
    }))
  }

  /**
   * tests leakage
   * @param testDescription - A description of what the test does
   * @param testFunction - A Function that returns a Promise and resolves or rejects
   */
  testLeakage(testDescription: string, testFunction: ITestFunction) {

  }

  /**
   * starts the test evaluation
   */
  async start(optionsArg?: {
    throwOnError: boolean
  }) {
    let promiseArray: Promise<any>[] = []

    // safeguard against empty test array
    if (this._tapTests.length === 0) {
      console.log('no tests specified. Ending here!')
      return
    }

    console.log(`1..${this._tapTests.length}`)
    for (let testKey = 0; testKey < this._tapTests.length; testKey++) {
      let currentTest = this._tapTests[testKey]
      let testPromise = currentTest.run(testKey)
      if (currentTest.parallel) {
        promiseArray.push(testPromise)
      } else {
        await testPromise
      }
    }
    await Promise.all(promiseArray)

    // when tests have been run and all promises are fullfilled
    let failReasons: string[] = []
    let executionNotes: string[] = []
    // collect failed tests
    for (let tapTest of this._tapTests) {
      if (tapTest.status !== 'success') {
        failReasons.push(
          `Test ${tapTest.testKey + 1} failed with status ${tapTest.status}:\n`
          + `|| ${tapTest.description}\n`
          + `|| for more information please take a look the logs above`
        )
      }
    }

    // render fail Reasons
    for (let failReason of failReasons) {
      console.log(failReason)
    }

    if (optionsArg && optionsArg.throwOnError && failReasons.length > 0) {
      process.exit(1)
    }
  }

  /**
   * handle errors
   */
  threw (err) {
    console.log(err)
  }
}

export let tap = new Tap()