import _ from 'lodash'
import assert from 'assert'
import arch from 'arch'
import os from 'os'
import ospath from 'ospath'
import hasha from 'hasha'
import tty from 'tty'
import path from 'path'
import { isCI as isCi } from 'ci-info'
import execa from 'execa'
import si from 'systeminformation'
import chalk from 'chalk'
import Bluebird from 'bluebird'
import cachedir from 'cachedir'
import logSymbols from 'log-symbols'
import executable from 'executable'
import { cwd } from 'process'
import { stripIndent } from 'common-tags'
import supportsColor from 'supports-color'
import isInstalledGlobally from 'is-installed-globally'
import logger from './logger'
import Debug from 'debug'
import fs from 'fs-extra'
import { relativeToRepoRoot } from './relative-to-repo-root'

const debug = Debug('cypress:cli')

const issuesUrl = 'https://github.com/cypress-io/cypress/issues'

/**
 * Returns SHA512 of a file
 */
const getFileChecksum = (filename: string): any => {
  assert.ok(_.isString(filename) && !_.isEmpty(filename), 'expected filename')

  return hasha.fromFile(filename, { algorithm: 'sha512' })
}

const getFileSize = async (filename: string): Promise<any> => {
  assert.ok(_.isString(filename) && !_.isEmpty(filename), 'expected filename')

  const { size } = await fs.stat(filename)

  return size
}

const isBrokenGtkDisplayRe = /Gtk: cannot open display/

const stringify = (val: any): string => {
  return _.isObject(val) ? JSON.stringify(val) : val
}

function normalizeModuleOptions (options: any = {}): any {
  return _.mapValues(options, stringify)
}

/**
 * Returns true if the platform is Linux. We do a lot of different
 * stuff on Linux (like Xvfb) and it helps to has readable code
 */
const isLinux = (): boolean => {
  return os.platform() === 'linux'
}

/**
   * If the DISPLAY variable is set incorrectly, when trying to spawn
   * Cypress executable we get an error like this:
  ```
  [1005:0509/184205.663837:WARNING:browser_main_loop.cc(258)] Gtk: cannot open display: 99
  ```
   */
const isBrokenGtkDisplay = (str: string): boolean => {
  return isBrokenGtkDisplayRe.test(str)
}

const isPossibleLinuxWithIncorrectDisplay = (): boolean => {
  return isLinux() && !!process.env.DISPLAY
}

const logBrokenGtkDisplayWarning = (): void => {
  debug('Cypress exited due to a broken gtk display because of a potential invalid DISPLAY env... retrying after starting Xvfb')

  // if we get this error, we are on Linux and DISPLAY is set
  logger.warn(stripIndent`

    ${logSymbols.warning} Warning: Cypress failed to start.

    This is likely due to a misconfigured DISPLAY environment variable.

    DISPLAY was set to: "${process.env.DISPLAY}"

    Cypress will attempt to fix the problem and rerun.
  `)

  logger.warn()
}

function stdoutLineMatches (expectedLine: string, stdout: string): boolean {
  const lines = stdout.split('\n').map((val) => val.trim())

  return lines.some((line) => line === expectedLine)
}

/**
 * Confirms if given value is a valid CYPRESS_INTERNAL_ENV value. Undefined values
 * are valid, because the system can set the default one.
 *
 * @param {string} value
 * @example util.isValidCypressInternalEnvValue(process.env.CYPRESS_INTERNAL_ENV)
 */
function isValidCypressInternalEnvValue (value: string | undefined): boolean {
  if (_.isUndefined(value)) {
    // will get default value
    return true
  }

  // names of config environments, see "packages/server/config/app.json"
  const names = ['development', 'test', 'staging', 'production']

  return _.includes(names, value)
}

/**
 * Confirms if given value is a non-production CYPRESS_INTERNAL_ENV value.
 * Undefined values are valid, because the system can set the default one.
 *
 * @param {string} value
 * @example util.isNonProductionCypressInternalEnvValue(process.env.CYPRESS_INTERNAL_ENV)
 */
function isNonProductionCypressInternalEnvValue (value: string | undefined): boolean {
  return !_.isUndefined(value) && value !== 'production'
}

/**
 * Prints NODE_OPTIONS using debug() module, but only
 * if DEBUG=cypress... is set
 */
function printNodeOptions (log: any = debug): void {
  if (!log.enabled) {
    return
  }

  if (process.env.NODE_OPTIONS) {
    log('NODE_OPTIONS=%s', process.env.NODE_OPTIONS)
  } else {
    log('NODE_OPTIONS is not set')
  }
}

/**
 * Removes double quote characters
 * from the start and end of the given string IF they are both present
 *
 * @param {string} str Input string
 * @returns {string} Trimmed string or the original string if there are no double quotes around it.
 * @example
  ```
  dequote('"foo"')
  // returns string 'foo'
  dequote('foo')
  // returns string 'foo'
  ```
 */
const dequote = (str: string): string => {
  assert.ok(_.isString(str), 'expected a string to remove double quotes')
  if (str.length > 1 && str[0] === '"' && str[str.length - 1] === '"') {
    return str.substr(1, str.length - 2)
  }

  return str
}

const parseOpts = (opts: any): any => {
  opts = _.pick(opts,
    'autoCancelAfterFailures',
    'browser',
    'cachePath',
    'cacheList',
    'cacheClear',
    'cachePrune',
    'ciBuildId',
    'ct',
    'component',
    'config',
    'configFile',
    'cypressVersion',
    'destination',
    'detached',
    'dev',
    'e2e',
    'exit',
    'env',
    'expose',
    'force',
    'global',
    'group',
    'headed',
    'headless',
    'inspect',
    'inspectBrk',
    'key',
    'path',
    'parallel',
    'passWithNoTests',
    'port',
    'posixExitCodes',
    'project',
    'quiet',
    'reporter',
    'reporterOptions',
    'record',
    'runnerUi',
    'runProject',
    'spec',
    'tag')

  if (opts.exit) {
    opts = _.omit(opts, 'exit')
  }

  // some options might be quoted - which leads to unexpected results
  // remove double quotes from certain options
  const cleanOpts = { ...opts }
  const toDequote = ['group', 'ciBuildId']

  for (const prop of toDequote) {
    if (_.has(opts, prop)) {
      cleanOpts[prop] = dequote(opts[prop])
    }
  }

  debug('parsed cli options %o', cleanOpts)

  return cleanOpts
}

/**
 * Copy of packages/server/lib/browsers/utils.ts
 * because we need same functionality in CLI to show the path :(
 */
const getApplicationDataFolder = (...paths: string[]): string => {
  const { env } = process

  // allow overriding the app_data folder
  let folder = env.CYPRESS_CONFIG_ENV || env.CYPRESS_INTERNAL_ENV || 'development'
  // eslint-disable-next-line no-restricted-syntax
  const pkg = JSON.parse(fs.readFileSync(relativeToRepoRoot('package.json') as string, 'utf8'))
  const PRODUCT_NAME = pkg.productName || pkg.name
  const OS_DATA_PATH = ospath.data()

  const ELECTRON_APP_DATA_PATH = path.join(OS_DATA_PATH, PRODUCT_NAME)

  if (process.env.CYPRESS_INTERNAL_E2E_TESTING_SELF) {
    folder = `${folder}-e2e-test`
  }

  const p = path.join(ELECTRON_APP_DATA_PATH, 'cy', folder, ...paths)

  return p
}

const util = {
  normalizeModuleOptions,
  parseOpts,
  isValidCypressInternalEnvValue,
  isNonProductionCypressInternalEnvValue,
  printNodeOptions,

  isCi (): boolean {
    return isCi
  },

  getEnvOverrides (options: any = {}): any {
    return _
    .chain({})
    .extend(this.getEnvColors())
    .extend(this.getForceTty())
    .omitBy(_.isUndefined) // remove undefined values
    .mapValues((value: any) => { // stringify to 1 or 0
      return value ? '1' : '0'
    })
    .extend(this.getOriginalNodeOptions())
    .value()
  },

  getOriginalNodeOptions (): any {
    const opts: any = {}

    if (process.env.NODE_OPTIONS) {
      opts.ORIGINAL_NODE_OPTIONS = process.env.NODE_OPTIONS
    }

    return opts
  },

  getForceTty (): any {
    return {
      FORCE_STDIN_TTY: this.isTty(process.stdin.fd),
      FORCE_STDOUT_TTY: this.isTty(process.stdout.fd),
      FORCE_STDERR_TTY: this.isTty(process.stderr.fd),
    }
  },

  getEnvColors (): any {
    const sc = this.supportsColor()

    return {
      FORCE_COLOR: sc,
      DEBUG_COLORS: sc,
      MOCHA_COLORS: sc ? true : undefined,
    }
  },

  isTty (fd: number): boolean {
    return tty.isatty(fd)
  },

  supportsColor (): boolean {
    // if we've been explicitly told not to support
    // color then turn this off
    if (process.env.NO_COLOR) {
      return false
    }

    // https://github.com/cypress-io/cypress/issues/1747
    // always return true in CI providers
    if (process.env.CI) {
      return true
    }

    // ensure that both stdout and stderr support color
    return Boolean(supportsColor.stdout) && Boolean(supportsColor.stderr)
  },

  cwd (): string {
    return cwd()
  },

  pkgBuildInfo (): any {
    // making this async would require many changes
    // eslint-disable-next-line no-restricted-syntax
    const pkgContent = fs.readFileSync(relativeToRepoRoot('package.json') as string, 'utf8')

    return JSON.parse(pkgContent).buildInfo
  },

  pkgVersion (): string {
    // making this async would require many changes
    // eslint-disable-next-line no-restricted-syntax
    const pkgContent = fs.readFileSync(relativeToRepoRoot('package.json') as string, 'utf8')

    return JSON.parse(pkgContent).version
  },

  // TODO: remove this method
  exit (code: number): never {
    process.exit(code)
  },

  logErrorExit1 (err: Error): never {
    logger.error(err.message)

    process.exit(1)
  },

  dequote,

  titleize (...args: any[]): string {
    // prepend first arg with space
    // and pad so that all messages line up
    args[0] = _.padEnd(` ${args[0]}`, 24)

    // get rid of any falsy values
    args = _.compact(args)

    return chalk.blue(...args)
  },

  calculateEta (percent: number, elapsed: number): number {
    // returns the number of seconds remaining

    // if we're at 100% already just return 0
    if (percent === 100) {
      return 0
    }

    // take the percentage and divide by one
    // and multiple that against elapsed
    // subtracting what's already elapsed
    return elapsed * (1 / (percent / 100)) - elapsed
  },

  convertPercentToPercentage (num: number): number {
    // convert a percent with values between 0 and 1
    // with decimals, so that it is between 0 and 100
    // and has no decimal places
    return Math.round(_.isFinite(num) ? (num * 100) : 0)
  },

  secsRemaining (eta: number): string {
    // calculate the seconds reminaing with no decimal places
    return (_.isFinite(eta) ? (eta / 1000) : 0).toFixed(0)
  },

  isInstalledGlobally (): boolean {
    return isInstalledGlobally
  },

  isSemver (str: string): boolean {
    return /^(\d+\.)?(\d+\.)?(\*|\d+)$/.test(str)
  },

  isExecutableAsync (filePath: string): any {
    return Promise.resolve(executable(filePath))
  },

  isLinux,

  async getOsVersionAsync (): Promise<any> {
    try {
      const osInfo = await si.osInfo()

      if (osInfo.distro && osInfo.release) {
        return `${osInfo.distro} - ${osInfo.release}`
      }
    } catch (err) {
      return os.release()
    }

    return os.release()
  },

  async getPlatformInfo (): Promise<string> {
    const [version, osArch] = await Bluebird.all([
      this.getOsVersionAsync(),
      this.getRealArch(),
    ])

    return stripIndent`
      Platform: ${os.platform()}-${osArch} (${version})
      Cypress Version: ${this.pkgVersion()}
    `
  },

  _cachedArch: undefined as string | undefined,

  /**
   * Attempt to return the real system arch (not process.arch, which is only the Node binary's arch)
   */
  async getRealArch (): Promise<string> {
    if (this._cachedArch) return this._cachedArch

    async function _getRealArch (): Promise<string> {
      const osPlatform = os.platform()

      const osArch = os.arch()

      debug('detecting arch %o', { osPlatform, osArch })

      if (osArch === 'arm64') return 'arm64'

      if (osPlatform === 'darwin') {
        // could possibly be x64 node on arm64 darwin, check if we are being translated by Rosetta
        // https://stackoverflow.com/a/65347893/3474615
        const { stdout } = await execa('sysctl', ['-n', 'sysctl.proc_translated']).catch(() => ({ stdout: '' }))

        debug('rosetta check result: %o', { stdout })
        if (stdout === '1') return 'arm64'
      }

      if (osPlatform === 'linux') {
        // could possibly be x64 node on arm64 linux, check the "machine hardware name"
        // list of names for reference: https://stackoverflow.com/a/45125525/3474615
        const { stdout } = await execa('uname', ['-m']).catch(() => ({ stdout: '' }))

        debug('arm uname -m result: %o ', { stdout })
        if (['aarch64_be', 'aarch64', 'armv8b', 'armv8l'].includes(stdout)) return 'arm64'
      }

      const pkgArch = arch()

      if (pkgArch === 'x86') return 'ia32'

      return pkgArch
    }

    return (this._cachedArch = await _getRealArch())
  },

  // attention:
  // when passing relative path to NPM post install hook, the current working
  // directory is set to the `node_modules/cypress` folder
  // the user is probably passing relative path with respect to root package folder
  formAbsolutePath (filename: string): string {
    if (path.isAbsolute(filename)) {
      return filename
    }

    return path.join(cwd(), '..', '..', filename)
  },

  getEnv (varName: string, trim?: boolean): string | undefined {
    assert.ok(_.isString(varName) && !_.isEmpty(varName), 'expected environment variable name, not')

    const configVarName = `npm_config_${varName}`
    const configVarNameLower = configVarName.toLowerCase()
    const packageConfigVarName = `npm_package_config_${varName}`

    let result: string | undefined

    if (process.env.hasOwnProperty(varName)) {
      debug(`Using ${varName} from environment variable`)

      result = process.env[varName]
    } else if (process.env.hasOwnProperty(configVarName)) {
      debug(`Using ${varName} from npm config`)

      result = process.env[configVarName]
    } else if (process.env.hasOwnProperty(configVarNameLower)) {
      debug(`Using ${varName.toLowerCase()} from npm config`)

      result = process.env[configVarNameLower]
    } else if (process.env.hasOwnProperty(packageConfigVarName)) {
      debug(`Using ${varName} from package.json config`)

      result = process.env[packageConfigVarName]
    }

    // environment variables are often set double quotes to escape characters
    // and on Windows it can lead to weird things: for example
    //  set FOO="C:\foo.txt" && node -e "console.log('>>>%s<<<', process.env.FOO)"
    // will print
    //    >>>"C:\foo.txt" <<<
    // see https://github.com/cypress-io/cypress/issues/4506#issuecomment-506029942
    // so for sanity sake we should first trim whitespace characters and remove
    // double quotes around environment strings if the caller is expected to
    // use this environment string as a file path
    return trim && (result !== null && result !== undefined) ? dequote(_.trim(result)) : result
  },

  getCacheDir (): string {
    return cachedir('Cypress')
  },

  isPostInstall (): boolean {
    return process.env.npm_lifecycle_event === 'postinstall'
  },

  exec: execa,

  stdoutLineMatches,

  issuesUrl,

  isBrokenGtkDisplay,

  logBrokenGtkDisplayWarning,

  isPossibleLinuxWithIncorrectDisplay,

  getGitHubIssueUrl (number: number): string {
    assert.ok(_.isInteger(number), 'github issue should be an integer')
    assert.ok(number > 0, 'github issue should be a positive number')

    return `${issuesUrl}/${number}`
  },

  getFileChecksum,

  getFileSize,

  getApplicationDataFolder,
}

export default util
