import proxyquire from 'proxyquire'
import createJestConfig from 'react-scripts/scripts/utils/createJestConfig'
import { getThisModulePath } from '../utils/getThisModulePath'
import { getProcessArg } from '../utils/processArg/getProcessArg'
import { isProcessArg } from '../utils/processArg/isProcessArg'
import { removeProcessArg } from '../utils/processArg/removeProcessArg'

export default (processArg: any[]) => {

  const sourceFolder = getProcessArg(processArg, 'src', 'src')
  const withLatestReactEnzyme = isProcessArg(processArg, 'withLatestReactEnzyme')
  let setupFile = getProcessArg(processArg, 'setupTestFile', undefined)
  removeProcessArg(processArg, 'src')
  removeProcessArg(processArg, 'setupTestFile')
  removeProcessArg(processArg, 'withLatestReactEnzyme', false)

  // since "test" is used as a param by this script and misinterpreted by jest we remove "test" param here
  processArg.splice(2, 1)

  if (withLatestReactEnzyme) {
    setupFile = getThisModulePath('dist/defaultConfigurations/setupTestFile.js')
  }

  proxyquire('react-scripts/scripts/test.js', {
    // When test.js asks for '../utils/createJestConfig' it will get this instead:
    './utils/createJestConfig': (...args: any[]) => {

      const defaultJestConfig: jest.ProjectConfig & any = createJestConfig(...args)
      defaultJestConfig.moduleFileExtensions.push('tsx', 'ts')
      defaultJestConfig.collectCoverageFrom = [sourceFolder + '/**/*.{js,jsx,mjs,ts,tsx}']
      defaultJestConfig.testMatch = ['<rootDir>/' + sourceFolder + '/**/?(*.)(spec|test).{js,jsx,mjs,ts,tsx}']
      defaultJestConfig.transform = {
        '.+\\.(css|styl|less|sass|scss)$': require.resolve('jest-css-modules-transform'),
        '^.+\\.(js|jsx)$': require.resolve('babel-jest'),
        '^.+\\.(ts|tsx)$': require.resolve('ts-jest'),
      }

      defaultJestConfig.globals = {
        ...defaultJestConfig.globals ? defaultJestConfig.globals : {},
        'ts-jest': {
          skipBabel: true,
        },
      }

      const tsConfig = require(defaultJestConfig.rootDir + '/tsconfig')

      if (tsConfig.compilerOptions.baseUrl && tsConfig.compilerOptions.paths) {

        const moduleNameMapper = Object.keys(tsConfig.compilerOptions.paths).reduce((current, onePath) => {
          const jestRegex = '^' + onePath.replace('*', '(.*)$')
          const jestSource = tsConfig.compilerOptions.paths[onePath][0]
          const jestResolve = '<rootDir>/' + tsConfig.compilerOptions.baseUrl + '/' + jestSource.replace('*', '$1')
          current[jestRegex] = jestResolve

          return current
        }, {})

        defaultJestConfig.moduleNameMapper = {
          ...defaultJestConfig.moduleNameMapper ? defaultJestConfig.moduleNameMapper : {},
          ...moduleNameMapper,
        }
      }

      defaultJestConfig.testEnvironment = 'jsdom'

      if (setupFile) {
        defaultJestConfig.setupTestFrameworkScriptFile = '<rootDir>/' + setupFile
      }

      return defaultJestConfig
    },
  })
}