import chalk from 'chalk'
import cp from 'child_process'
import fs from 'fs-extra'
import tmp from 'tmp'

import paths from './config/paths'

const exec = (cmd: string, opts?: cp.ExecSyncOptions) =>
  cp.execSync(cmd, { encoding: 'utf-8', stdio: 'pipe', ...opts }) as string

function validateSVNRoot(root: string) {
  const ls = exec(`svn ls ${root}`)
  return ['trunk', 'branches'].every((s) => ls.includes(s))
}

interface WorkingCopyInfo {
  url: string
  branch: string
  revision: string
  author: string
  distBranchURL: string
  distBranchDirURL: string
  root: string
}
function getWorkingCopyInfo(): WorkingCopyInfo {
  exec(`svn up`)
  const url = exec(`svn info --show-item url`).trim()
  const revision = exec(`svn info --show-item last-changed-revision`).trim()
  const author = exec(`svn info --show-item last-changed-author`).trim()

  let branch = 'trunk'
  let root = url.replace(/\/trunk$/, '')
  if (url.includes('/branches/')) {
    branch = url.split('/').pop()!
    root = url.replace(/\/branches\/[^/]+$/, '')
  }
  let distBranchURL = root + '/branches/dist'
  let distBranchDirURL = distBranchURL + '/' + branch
  if (!validateSVNRoot(root)) {
    console.log(chalk.red('SVN目录不符合规则，必须包含 trunk branches'))
    process.exit(1)
  }

  return { url, branch, revision, author, distBranchURL, distBranchDirURL, root }
}

function copyDistToRepo(info: WorkingCopyInfo) {
  const tmpdir = tmp.dirSync().name

  try {
    exec(`svn ls ${info.distBranchDirURL} --depth empty`)
  } catch (error: any) {
    if (error.message.includes('non-existent')) {
      exec(
        `svn mkdir ${info.distBranchDirURL} --parents -m "[edu-scripts] create ${info.branch} dist"`
      )
    } else {
      throw error
    }
  }
  exec(`svn co ${info.distBranchDirURL} ${tmpdir}`)

  try {
    exec(`svn rm * --force -q`, { cwd: tmpdir })
  } catch {}
  fs.copySync(paths.dist, tmpdir)

  exec(`svn add * --force --auto-props --parents --depth infinity -q`, { cwd: tmpdir })

  const msg = `[edu-scripts] commit ${info.branch} dist #${info.revision} @${info.author}`
  exec(`svn ci -m "${msg}"`, { cwd: tmpdir })

  fs.removeSync(tmpdir)
}

interface CommitDistArgs {
  rmLocal?: boolean
}
export default async function commitDist(args: CommitDistArgs) {
  if (!fs.existsSync(paths.dist)) {
    console.log(chalk.red('未找到 dist 文件夹，请先 edu-scpirts build'))
    process.exit(1)
  }

  if (exec('svn st').trim().length) {
    console.log(chalk.red('似乎存在未提交的代码，请提交后重试。运行 svn st 查看具体信息'))
    process.exit(1)
  }

  const info = getWorkingCopyInfo()

  console.log(
    chalk.green(
      [
        `分支: ${info.branch}`,
        `版本: ${info.revision}`,
        `作者: ${info.author}`,
        `地址: ${info.distBranchDirURL}`,
      ].join('\n')
    )
  )

  copyDistToRepo(info)

  if (args.rmLocal) {
    fs.removeSync(paths.dist)
  }

  console.log(chalk.green('提交完成'))
}