import { createUnplugin } from 'unplugin'
import type { Options } from './types'

export default createUnplugin<Options | undefined>((options = {}) => {
  const {
    metaFileName = 'meta.json',
    generateOnBuild = true,
    devMock = true,
    injectComponent = false,  // 由于跨构建工具自动注入组件复杂，建议用户手动注册组件
  } = options

  return {
    name: 'unplugin-version-checker',
    enforce: 'post',

    writeBundle() {
      if (!generateOnBuild) return
      const versionInfo = {
        buildTime: new Date().toISOString(),
        version: process.env.BUILD_ID || process.env.npm_package_version,
        commitHash: process.env.COMMIT_SHORT || process.env.GIT_COMMIT_SHORT,
      }
      this.emitFile({
        type: 'asset',
        fileName: metaFileName,
        source: JSON.stringify(versionInfo, null, 2),
      })
    },

    configureServer(server) {
      if (!devMock) return
      server.middlewares.use((req, res, next) => {
        if (req.url === `/${metaFileName}`) {
          res.setHeader('Content-Type', 'application/json')
          res.end(JSON.stringify({
            buildTime: new Date().toISOString(),
            version: 'dev',
            commitHash: 'dev',
          }))
          return
        }
        next()
      })
    }
  }
})