import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'
import path from 'path'
import http from 'http'

// Plugin to check setup status and serve setup page from backend if needed
const setupCheckPlugin = () => ({
  name: 'setup-check',
  configureServer(server) {
    server.middlewares.use(async (req, res, next) => {
      // Only check root paths
      if (req.url !== '/' && req.url !== '/index.html') {
        return next()
      }

      try {
        // Check setup status from backend
        const setupStatus = await new Promise<{ setup_required: boolean }>((resolve, reject) => {
          const request = http.get('http://localhost:8080/api/v1/auth/setup-status', (response) => {
            let data = ''
            response.on('data', chunk => data += chunk)
            response.on('end', () => {
              try {
                resolve(JSON.parse(data))
              } catch (e) {
                reject(e)
              }
            })
          })
          request.on('error', reject)
          request.setTimeout(3000, () => reject(new Error('Timeout')))
        })

        // If setup required, proxy the setup page from backend
        if (setupStatus.setup_required) {
          // Fetch setup page from backend
          const setupPage = await new Promise<string>((resolve, reject) => {
            const request = http.get('http://localhost:8080/', (response) => {
              let data = ''
              response.on('data', chunk => data += chunk)
              response.on('end', () => resolve(data))
            })
            request.on('error', reject)
            request.setTimeout(5000, () => reject(new Error('Timeout')))
          })

          // Serve the setup page
          res.setHeader('Content-Type', 'text/html')
          res.end(setupPage)
          return
        }
      } catch (err) {
        // If backend is not running or error occurs, continue to app
        console.warn('[setup-check] Could not check setup status, assuming setup complete')
      }

      next()
    })
  },
})

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [react(), setupCheckPlugin()],
  resolve: {
    alias: {
      '@': path.resolve(__dirname, './src'),
    },
  },
  build: {
    outDir: 'dist',
    emptyOutDir: true,
  },
  server: {
    port: 3000,
    proxy: {
      '/api': {
        target: 'http://localhost:8080',
        changeOrigin: true,
      },
    },
  },
})