import * as github from '@actions/github'
import * as core from '@actions/core'

import {OWNER, REPO} from './utils/utils'
import {createReadStream, promises as fs} from 'fs'
import * as readline from 'readline'
import * as semver from 'semver'

import {updateChecksums} from './download/checksum/update-known-checksums'

async function run(): Promise<void> {
  const checksumFilePath = process.argv.slice(2)[0]
  const defaultVersionFilePath = process.argv.slice(2)[1]
  const github_token = process.argv.slice(2)[2]

  const octokit = github.getOctokit(github_token)

  const response = await octokit.paginate(octokit.rest.repos.listReleases, {
    owner: OWNER,
    repo: REPO
  })
  const downloadUrls: string[] = response.flatMap(release =>
    release.assets
      .filter(asset => asset.name.endsWith('.sha256'))
      .map(asset => asset.browser_download_url)
  )
  await updateChecksums(checksumFilePath, downloadUrls)

  const latestVersion = response
    .map(release => release.tag_name)
    .sort(semver.rcompare)[0]
  core.setOutput('latest-version', latestVersion)
  await updateDefaultVersion(defaultVersionFilePath, latestVersion)
}

async function updateDefaultVersion(
  filePath: string,
  latestVersion: string
): Promise<void> {
  const fileStream = createReadStream(filePath)

  const rl = readline.createInterface({
    input: fileStream
  })

  let foundDescription = false
  const lines = []

  for await (let line of rl) {
    if (
      !foundDescription &&
      line.includes("description: 'The version of uv to install'")
    ) {
      foundDescription = true
    } else if (foundDescription && line.includes('default: ')) {
      line = line.replace(/'[^']*'/, `'${latestVersion}'`)
      foundDescription = false
    }
    lines.push(line)
  }

  await fs.writeFile(filePath, lines.join('\n'))
}

run()