import { defineConfig } from 'vite'
import uni from '@dcloudio/vite-plugin-uni'
import { existsSync, readFileSync } from 'fs'
import { resolve } from 'path'

// 开发服务器：显式处理 public 目录下的静态文件，避免被 SPA history 路由拦截
function servePublicFiles() {
  return {
    name: 'serve-public-files',
    configureServer(server) {
      server.middlewares.use((req, res, next) => {
        if (req.url) {
          const filePath = resolve(__dirname, 'public', req.url.slice(1))
          if (existsSync(filePath) && filePath.endsWith('.txt')) {
            const content = readFileSync(filePath, 'utf-8')
            res.setHeader('Content-Type', 'text/plain; charset=utf-8')
            res.end(content)
            return
          }
        }
        next()
      })
    },
  }
}

export default defineConfig({
  plugins: [servePublicFiles(), uni()],
  // 将构建时的 DEPLOY_ENV 环境变量注入到客户端代码中
  define: {
    'process.env.DEPLOY_ENV': JSON.stringify(process.env.DEPLOY_ENV || ''),
  },
  css: {
    preprocessorOptions: {
      scss: {
        silenceDeprecations: ['import', 'global-builtin', 'color-functions', 'if-function'],
      },
    },
  },
  publicDir: 'public',
})