const fs = require('node:fs')
const path = require('node:path')

const packageJsonPath = path.resolve(__dirname, '../package.json')
const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, 'utf8'))

const currentVersion = packageJson.version
const requestedVersion = process.env.DESKTOP_VERSION
const bumpType = process.argv[2] || process.env.DESKTOP_VERSION_BUMP || 'patch'

function assertVersion(version) {
  if (!/^\d+\.\d+\.\d+(?:[-+][0-9A-Za-z.-]+)?$/.test(version)) {
    throw new Error(`Invalid desktop version "${version}". Expected semver like 1.2.3.`)
  }
}

function bump(version, type) {
  const match = /^(\d+)\.(\d+)\.(\d+)(?:[-+].*)?$/.exec(version)
  if (!match) {
    throw new Error(`Cannot bump invalid desktop version "${version}".`)
  }

  const major = Number(match[1])
  const minor = Number(match[2])
  const patch = Number(match[3])

  if (type === 'major') {
    return `${major + 1}.0.0`
  }

  if (type === 'minor') {
    return `${major}.${minor + 1}.0`
  }

  if (type === 'patch') {
    return `${major}.${minor}.${patch + 1}`
  }

  assertVersion(type)
  return type
}

assertVersion(currentVersion)

const nextVersion = requestedVersion || bump(currentVersion, bumpType)
assertVersion(nextVersion)

packageJson.version = nextVersion
fs.writeFileSync(packageJsonPath, `${JSON.stringify(packageJson, null, 2)}\n`)

console.log(`Desktop version bumped: ${currentVersion} -> ${nextVersion}`)