import os from 'os'
import lt from 'semver/functions/lt'

// arch in [arm, arm64, x64...] (https://nodejs.org/docs/latest-v16.x/api/os.html#osarch)
// return value in [amd64, arm64, arm]
const mapArch = (arch: string): string => {
  const mappings: Record<string, string> = {
    x64: 'amd64'
  }
  return mappings[arch] || arch
}

// os in [darwin, linux, win32...] (https://nodejs.org/docs/latest-v16.x/api/os.html#osplatform)
// return value in [darwin, linux, windows]
const mapOS = (platform: string): string => {
  const mappings: Record<string, string> = {
    win32: 'windows'
  }
  return mappings[platform] || platform
}

export const getDownloadUrl = async (version: string): Promise<string> => {
  const platform = mapOS(os.platform())
  const arch = mapArch(os.arch())
  const filename = `supabase_${platform}_${arch}.tar.gz`
  if (version.toLowerCase() === 'latest') {
    return `https://github.com/supabase/cli/releases/latest/download/${filename}`
  }
  if (lt(version, '1.28.0')) {
    return `https://github.com/supabase/cli/releases/download/v${version}/supabase_${version}_${platform}_${arch}.tar.gz`
  }
  return `https://github.com/supabase/cli/releases/download/v${version}/${filename}`
}