import type { IncomingMessage } from 'node:http'
import { loadEnv, mergeConfig, type ConfigEnv, type ProxyOptions } from 'vite'
// import eslint from 'vite-plugin-eslint'
import baseConfig from './vite.config.base'

const HIKVISION_PROXY_TIMEOUT = 8000

const proxyTarget = (port: number) => ({
  target: `http://127.0.0.1:${port}`,
  changeOrigin: true,
})

/** 读取海康 WebSDK 写入的代理目标 Cookie。 */
function getProxyCookie(request: IncomingMessage, name: string): string {
  const cookie = request.headers.cookie || ''
  const matched = cookie.match(new RegExp(`(?:^|;\\s*)${name}=([^;]+)`))
  if (!matched) return ''
  try {
    return decodeURIComponent(matched[1])
  } catch (_error) {
    return ''
  }
}

/** 从 SDK Cookie 解析 WebSocket 端口，并限制只能代理到已配置的录像机。 */
function resolveHikvisionWebSocketTarget(request: IncomingMessage, allowedHost: string, fallbackTarget: string): string {
  const secureAddress = getProxyCookie(request, 'webVideoCtrlProxyWss')
  const address = secureAddress || getProxyCookie(request, 'webVideoCtrlProxyWs')
  if (!address) return fallbackTarget
  try {
    const target = new URL(`${secureAddress ? 'wss' : 'ws'}://${address}`)
    return target.hostname.toLowerCase() === allowedHost.toLowerCase() ? target.toString() : fallbackTarget
  } catch (_error) {
    return fallbackTarget
  }
}

/** 创建开发环境 Vite 配置。 */
export default ({ mode }: ConfigEnv) => {
  const env = loadEnv(mode, process.cwd(), '')
  const apiProxyTarget = env.VITE_API_PROXY_TARGET || 'https://ops-api.apinb.com'
  const proxy: Record<string, ProxyOptions> = {
    '/api': {
      target: apiProxyTarget,
      changeOrigin: true,
      ws: true,
      rewrite: (path) => path.replace(/^\/api/, ''),
    },
    '/rbac2': proxyTarget(10001),
    '/Alert': proxyTarget(12427),
    '/alert': proxyTarget(12427),
    '/DC-Control': proxyTarget(3031),
    '/dc-control': proxyTarget(3031),
    '/dc-network': proxyTarget(12429),
    '/DC-Hardware': proxyTarget(12450),
    '/dc-hardware': proxyTarget(12450),
    '/dc-host': proxyTarget(9030),
    '/dc-middleware': proxyTarget(12428),
    '/dc-database': proxyTarget(12580),
    '/Feedback': proxyTarget(12432),
    '/feedback': proxyTarget(12432),
    '/Assets': proxyTarget(12430),
    '/assets': proxyTarget(12430),
    '/Logs': proxyTarget(12440),
    '/logs': proxyTarget(12440),
    '/Kb': proxyTarget(12434),
    '/kb': proxyTarget(12434),
    '/Mgt': proxyTarget(12436),
    '/mgt': proxyTarget(12436),
    '/Visual': proxyTarget(12438),
    '/visual': proxyTarget(12438),
  }

  if (env.VITE_HIKVISION_PROXY_TARGET) {
    const hikvisionHttpTarget = new URL(env.VITE_HIKVISION_PROXY_TARGET)
    const hikvisionWebSocketTarget =
      env.VITE_HIKVISION_WS_PROXY_TARGET || `${hikvisionHttpTarget.protocol === 'https:' ? 'wss' : 'ws'}://${hikvisionHttpTarget.host}`
    proxy['/ISAPI'] = {
      target: env.VITE_HIKVISION_PROXY_TARGET,
      changeOrigin: true,
      secure: false,
      timeout: HIKVISION_PROXY_TIMEOUT,
      proxyTimeout: HIKVISION_PROXY_TIMEOUT,
    }
    proxy['/SDK'] = {
      target: env.VITE_HIKVISION_PROXY_TARGET,
      changeOrigin: true,
      secure: false,
      timeout: HIKVISION_PROXY_TIMEOUT,
      proxyTimeout: HIKVISION_PROXY_TIMEOUT,
    }
    proxy['/webSocketVideoCtrlProxy'] = {
      target: hikvisionWebSocketTarget,
      changeOrigin: true,
      secure: false,
      ws: true,
      timeout: HIKVISION_PROXY_TIMEOUT,
      proxyTimeout: HIKVISION_PROXY_TIMEOUT,
      router: env.VITE_HIKVISION_WS_PROXY_TARGET
        ? undefined
        : (request) => resolveHikvisionWebSocketTarget(request, hikvisionHttpTarget.hostname, hikvisionWebSocketTarget),
      rewrite: (path) => path.replace(/^\/webSocketVideoCtrlProxy/, '/'),
    }
  }

  return mergeConfig(
    {
      mode: 'development',
      server: {
        open: true,
        host: '0.0.0.0',
        headers: {
          'Cross-Origin-Embedder-Policy': 'require-corp',
          'Cross-Origin-Opener-Policy': 'same-origin',
          'Cross-Origin-Resource-Policy': 'cross-origin',
        },
        fs: {
          strict: true,
        },
        proxy,
      },
      plugins: [
        // eslint({
        //   cache: false,
        //   include: ['src/**/*.ts', 'src/**/*.tsx', 'src/**/*.vue'],
        //   exclude: ['node_modules'],
        // }),
      ],
    },
    baseConfig
  )
}