const path = require('path')
const { read, write, position, run } = require('promise-path')

const fromHere = position(__dirname)
const report = (...messages) => console.log(`[${require(fromHere('./package.json')).logName} / ${__filename.split(path.sep).pop().split('.js').shift()}]`, ...messages)

async function replaceInFile (filename, search, replace) {
  const haystack = await read(filename, 'utf8')
  const ashes = haystack.replace(search, replace)
  return write(filename, ashes, 'utf8')
}

async function setup () {
  const currentPath = fromHere('/')
  const currentFolder = currentPath.split('/').reverse()[1]

  report('Setting up template from:', currentFolder)

  const currentYear = currentFolder.split('-').pop()

  if (currentYear === 'template') {
    console.error('  No current year provided.')
    console.error('  Please re-run setup after renaming the repo, e.g.: advent-of-code-2020, advent-of-code-2021, advent-of-code-2022, etc.')
    console.error('')
    process.exit(0)
  }

  report('Replacing strings in templates')
  await replaceInFile('README.md', 'If using the Advent of Code Template repo; click [**`Use this template`**](https://github.com/johnbeech/advent-of-code-nodejs-template/generate) and set a new repository name.\n', '')
  await replaceInFile('README.md', 'If this a brand new repository, run: `node setup` to configure it for Current Year and check in the changes.\n', '')

  await replaceInFile('package.json', /Advent of Code Template/g, `Advent of Code ${currentYear}`)
  await replaceInFile('README.md', '# Advent of Code Template', `# Advent of Code ${currentYear}`)

  await replaceInFile('package.json', 'Advent of Code Template using Node JS for Current Year.', `My solutions for Advent of Code ${currentYear}.`)
  await replaceInFile('README.md', 'Advent of Code Template using Node JS for Current Year.', `My solutions for Advent of Code ${currentYear}.`)

  await replaceInFile('package.json', 'advent-of-code-template', currentFolder)

  report('Removing setup script')
  await run(`rm ${fromHere('setup.js')}`)

  report('Committing changes and pushing to remote')
  await run('git add .')
  await run(`git commit -m "Setup template for Current Year (${currentYear})"`)
  await run('git push')

  report(`All done! ${currentYear} setup and ready to go~`)
}

setup()