import { defineConfig } from 'vite'
import { resolve } from 'path'
import copy from 'rollup-plugin-copy'

export default defineConfig({
  root: '.',
  build: {
    outDir: 'dist',
    rollupOptions: {
      plugins: [
        copy({
          targets: [
            {
              src: resolve(__dirname, '../../api.spec.json'),
              dest: 'dist'
            }
          ],
          hook: 'writeBundle'
        })
      ]
    }
  },
  resolve: {
    alias: {
      '@': resolve(__dirname, './')
    }
  },
  server: {
    port: 3000,
    fs: {
      allow: ['..', '../..']
    },
    historyApiFallback: false
  },
  publicDir: false,
  configureServer(server) {
    server.middlewares.use('/', (req, res, next) => {
      if (req.url === '/api.spec.json' && req.method === 'GET') {
        const fs = require('fs')
        const path = require('path')
        const apiSpecPath = path.resolve(__dirname, './api.spec.json')

        console.log('Serving api.spec.json from:', apiSpecPath)

        try {
          const content = fs.readFileSync(apiSpecPath, 'utf-8')
          res.setHeader('Content-Type', 'application/json')
          res.setHeader('Cache-Control', 'no-cache')
          res.end(content)
        } catch (error) {
          console.error('Error reading api.spec.json:', error)
          res.statusCode = 404
          res.setHeader('Content-Type', 'text/plain')
          res.end('File not found')
        }
      } else {
        next()
      }
    })

    // Mock API endpoint for testing
    server.middlewares.use('/api', (req, res, next) => {
      if (req.method === 'POST') {
        let body = ''
        req.on('data', chunk => {
          body += chunk.toString()
        })
        req.on('end', () => {
          try {
            const requestData = JSON.parse(body)
            const response = {
              jsonrpc: '2.0',
              result: {
                success: true,
                message: `Method ${requestData.method} called with params: ${JSON.stringify(requestData.params)}`,
                timestamp: new Date().toISOString()
              },
              id: requestData.id
            }
            res.setHeader('Content-Type', 'application/json')
            res.end(JSON.stringify(response))
          } catch (error) {
            res.statusCode = 400
            res.end(JSON.stringify({
              jsonrpc: '2.0',
              error: { code: -32700, message: 'Parse error' },
              id: null
            }))
          }
        })
      } else {
        next()
      }
    })
  }
})