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import * as http from 'node:http'
import assert from 'node:assert'
import test, { after, before } from 'node:test'
import { spawn } from 'node:child_process'

const hostname = '127.0.0.1'
const port = 8090
const baseUrl = `http://${hostname}:${port}`
let server = null

before(() => new Promise((resolve, reject) => {
  const nodeBinary = process.argv[0]
  server = spawn(nodeBinary, ['server.mjs'], {
    env: {
      HOSTNAME: hostname,
      PORT: port
    }
  })

  server.stdout.on('data', (data) => {
    console.log(`server stdout: ${data}`)
    if (data.toString().includes('Listening on')) {
      resolve()
    }
  })

  server.stderr.on('data', (data) => {
    console.log(`server stderr: ${data}`)
  })

  server.on('error', (err) => {
    reject(new Error(`Server failed to start: ${err}`))
  })
}))

after(() => {
  if (server) {
    server.kill()
    server = null
  }
})

test('current time endpoint', (t, done) => {
  http.get(`${baseUrl}/gettime`, (res) => {
    assert.strictEqual(res.statusCode, 200)
    assert.strictEqual(res.headers['content-type'], 'application/json')

    let data = ''

    res.on('data', (chunk) => {
      data += chunk
    })

    res.on('end', () => {
      const decoded = JSON.parse(data)
      const current = Math.floor(Date.now() / 1000)
      assert.ok('time' in decoded)
      assert.ok(typeof decoded.time === 'number')
      assert.ok(current - decoded.time < 3)
      done()
    })
  }).on('error', (err) => {
    assert.fail(`HTTP request failed: ${err.message}`)
  })
})

test('device registration endpoint', (t, done) => {
  http.get(`${baseUrl}/eagle`, (res) => {
    assert.strictEqual(res.statusCode, 200)
    assert.strictEqual(res.headers['content-type'], 'application/json')

    let data = ''

    res.on('data', (chunk) => {
      data += chunk
    })

    res.on('end', () => {
      const decoded = JSON.parse(data)
      assert.strictEqual(decoded.status, 200)
      assert.ok(typeof decoded.data?.eagleId === 'number')
      done()
    })
  }).on('error', (err) => {
    assert.fail(`HTTP request failed: ${err.message}`)
  })
})