/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import * as chalk from 'chalk'
import * as url from 'url'
import * as globalModules from 'global-modules'
import * as fs from 'fs'

function printHostingInstructions(
  appPackage,
  publicUrl,
  publicPath,
  buildFolder,
  useYarn,
  isSinglePageApp = true
) {
  if (publicUrl && publicUrl.includes('.github.io/')) {
    // "homepage": "http://user.github.io/project"
    const publicPathname = url.parse(publicPath).pathname
    const hasDeployScript = typeof appPackage.scripts.deploy !== 'undefined'
    printBaseMessage(buildFolder, publicPathname)

    printDeployInstructions(publicUrl, hasDeployScript, useYarn)
  } else if (publicPath !== '/') {
    // "homepage": "http://mywebsite.com/project"
    printBaseMessage(buildFolder, publicPath)
  } else {
    // "homepage": "http://mywebsite.com"
    //   or no homepage
    printBaseMessage(buildFolder, publicUrl)

    printStaticServerInstructions(buildFolder, useYarn, isSinglePageApp)
  }
  console.log()
  console.log('Find out more about deployment here:')
  console.log()
  console.log(`  ${chalk.yellow('http://bit.ly/CRA-deploy')}`)
  console.log()
}

function printBaseMessage(buildFolder, hostingLocation) {
  console.log(
    `The project was built assuming it is hosted at ${chalk.green(
      hostingLocation || 'the server root'
    )}.`
  )
  console.log(
    `You can control this with the ${chalk.green(
      'homepage'
    )} field in your ${chalk.cyan('package.json')}.`
  )

  if (!hostingLocation) {
    console.log('For example, add this to build it for GitHub Pages:')
    console.log()

    console.log(
      `  ${chalk.green('"homepage"')} ${chalk.cyan(':')} ${chalk.green(
        '"http://myname.github.io/myapp"'
      )}${chalk.cyan(',')}`
    )
  }
  console.log()
  console.log(`The ${chalk.cyan(buildFolder)} folder is ready to be deployed.`)
}

function printDeployInstructions(publicUrl, hasDeployScript, useYarn) {
  console.log(`To publish it at ${chalk.green(publicUrl)}, run:`)
  console.log()

  // If script deploy has been added to package.json, skip the instructions
  if (!hasDeployScript) {
    if (useYarn) {
      console.log(`  ${chalk.cyan('yarn')} add --dev gh-pages`)
    } else {
      console.log(`  ${chalk.cyan('npm')} install --save-dev gh-pages`)
    }
    console.log()

    console.log(
      `Add the following script in your ${chalk.cyan('package.json')}.`
    )
    console.log()

    console.log(`    ${chalk.dim('// ...')}`)
    console.log(`    ${chalk.yellow('"scripts"')}: {`)
    console.log(`      ${chalk.dim('// ...')}`)
    console.log(
      `      ${chalk.yellow('"predeploy"')}: ${chalk.yellow(
        `"${useYarn ? 'yarn' : 'npm run'} build",`
      )}`
    )
    console.log(
      `      ${chalk.yellow('"deploy"')}: ${chalk.yellow(
        '"gh-pages -d build"'
      )}`
    )
    console.log('    }')
    console.log()

    console.log('Then run:')
    console.log()
  }
  console.log(`  ${chalk.cyan(useYarn ? 'yarn' : 'npm')} run deploy`)
}

function printStaticServerInstructions(buildFolder, useYarn, isSinglePageApp) {
  console.log('You may serve it with a static server:')
  console.log()

  if (!fs.existsSync(`${globalModules}/serve`)) {
    if (useYarn) {
      console.log(`  ${chalk.cyan('yarn')} global add serve`)
    } else {
      console.log(`  ${chalk.cyan('npm')} install -g serve`)
    }
  }
  console.log(
    `  ${chalk.cyan('serve')} ${isSinglePageApp ? '-s ' : ''}${buildFolder}`
  )
}

export default printHostingInstructions