import process from 'node:process'
import os from 'node:os'
import env from '../../env.ts'
import { Type, type FastifyPluginCallbackTypebox } from '@fastify/type-provider-typebox'

const ProcessSchema = Type.Object({
  env: Type.String(),
  version: Type.String(),
  uptime: Type.Number(),
  memoryUsage: Type.Object({
    rss: Type.Number(),
    heapTotal: Type.Number(),
    heapUsed: Type.Number(),
    external: Type.Number(),
    arrayBuffers: Type.Number(),
  }),
  resourceUsage: Type.Object({
    userCPUTime: Type.Number(),
    systemCPUTime: Type.Number(),
    maxRSS: Type.Number(),
    sharedMemorySize: Type.Number(),
    unsharedDataSize: Type.Number(),
    unsharedStackSize: Type.Number(),
    minorPageFault: Type.Number(),
    majorPageFault: Type.Number(),
    swappedOut: Type.Number(),
    fsRead: Type.Number(),
    fsWrite: Type.Number(),
    ipcSent: Type.Number(),
    ipcReceived: Type.Number(),
    signalsCount: Type.Number(),
    voluntaryContextSwitches: Type.Number(),
    involuntaryContextSwitches: Type.Number(),
  }),
})

const OSSchema = Type.Object({
  freemem: Type.Number(),
  totalmem: Type.Number(),
  arch: Type.String(),
  homedir: Type.String(),
  hostname: Type.String(),
  loadavg: Type.Array(Type.Number()),
  machine: Type.String(),
  platform: Type.String(),
  release: Type.String(),
  type: Type.String(),
  uptime: Type.Number(),
  version: Type.String(),
})

const processPlugin: FastifyPluginCallbackTypebox = (fastify, _options, done) => {
  fastify.addHook('onRequest', fastify.auth)

  fastify.route({
    method: 'GET',
    url: '/',
    schema: {
      response: {
        200: Type.Object({
          process: ProcessSchema,
          os: OSSchema,
        }),
      },
    },
    handler() {
      return {
        process: {
          env: env.NODE_ENV,
          version: process.version,
          uptime: process.uptime(),
          memoryUsage: process.memoryUsage(),
          resourceUsage: process.resourceUsage(),
        },
        os: {
          freemem: os.freemem(),
          totalmem: os.totalmem(),
          arch: os.arch(),
          homedir: os.homedir(),
          hostname: os.hostname(),
          loadavg: os.loadavg(),
          machine: os.machine(),
          platform: os.platform(),
          release: os.release(),
          type: os.type(),
          uptime: os.uptime(),
          version: os.version(),
        },
      }
    },
  })

  done()
}

export default processPlugin