import { createServer, type Server, type ServerResponse } from 'node:http'

import {
  E2E_MOCK_API_HOST,
  E2E_MOCK_API_PORT,
  e2eBlogArticleDetail,
  e2eBlogArticleSlug,
  e2eBlogArticleSummary,
} from './fixtures/blogApiMock'
import { matchConsumerE2eMockGet } from './fixtures/consumerEventApi'

declare global {
  var __ghabileeE2eMockApiServer: Server | undefined
}

function writeJson(res: ServerResponse, status: number, body: unknown) {
  res.writeHead(status, { 'Content-Type': 'application/json' })
  res.end(JSON.stringify(body))
}

export default async function globalSetup() {
  const server = createServer((req, res) => {
    const url = new URL(req.url ?? '/', `http://${E2E_MOCK_API_HOST}:${E2E_MOCK_API_PORT}`)
    const { pathname } = url

    if (req.method !== 'GET') {
      writeJson(res, 405, { success: false, message: 'Method not allowed' })

      return
    }

    if (pathname === '/api/v1/blog-articles') {
      writeJson(res, 200, { success: true, data: [e2eBlogArticleSummary] })

      return
    }

    if (pathname === `/api/v1/blog-articles/${e2eBlogArticleSlug}`) {
      writeJson(res, 200, { success: true, data: e2eBlogArticleDetail })

      return
    }

    if (pathname === `/api/v1/blog-articles/${e2eBlogArticleSlug}/related`) {
      writeJson(res, 200, { success: true, data: [] })

      return
    }

    const consumerMock = matchConsumerE2eMockGet(pathname)

    if (consumerMock) {
      writeJson(res, consumerMock.status, consumerMock.body)

      return
    }

    writeJson(res, 404, { success: false, message: 'Not found' })
  })

  await new Promise<void>((resolve, reject) => {
    server.once('error', (error: NodeJS.ErrnoException) => {
      if (error.code === 'EADDRINUSE') {
        // Full `pnpm test:e2e` already runs the Nest API on :3000 — use its blog seed data.
        resolve()

        return
      }
      reject(error)
    })
    server.listen(E2E_MOCK_API_PORT, E2E_MOCK_API_HOST, () => {
      resolve()
    })
  })

  if (server.listening) {
    globalThis.__ghabileeE2eMockApiServer = server
  }
}