"""The same application code is loaded by every server in the comparison."""
import asyncio
import os

TINY = b'Hello world!'
LARGE = b'x' * 65536
STREAM = b'first\nlast\n'


async def raw_app(scope, receive, send):
  if scope['type'] == 'lifespan':
    while True:
      message = await receive()
      if message['type'] == 'lifespan.startup':
        await send({'type': 'lifespan.startup.complete'})
      elif message['type'] == 'lifespan.shutdown':
        await send({'type': 'lifespan.shutdown.complete'})
        return
  path = scope['path']
  if path == '/tiny':
    body = TINY
  elif path == '/bytes':
    body = LARGE
  elif path == '/echo':
    parts = []
    while True:
      message = await receive()
      if message['type'] != 'http.request':
        return
      parts.append(message.get('body', b''))
      if not message.get('more_body', False):
        break
    body = b''.join(parts)
  elif path == '/_benchmark_pid':
    body = str(os.getpid()).encode('ascii')
  elif path == '/stream':
    await send({'type': 'http.response.start', 'status': 200,
                'headers': [(b'content-type', b'text/plain'), (b'content-length', b'11')]})
    await send({'type': 'http.response.body', 'body': b'first\n', 'more_body': True})
    await asyncio.sleep(0.05)
    await send({'type': 'http.response.body', 'body': b'last\n'})
    return
  else:
    await send({'type': 'http.response.start', 'status': 404})
    await send({'type': 'http.response.body', 'body': b'missing'})
    return
  await send({'type': 'http.response.start', 'status': 200,
              'headers': [(b'content-type', b'text/plain'),
                          (b'content-length', str(len(body)).encode('ascii'))]})
  await send({'type': 'http.response.body', 'body': body})


def __getattr__(name):
  if name != 'fastapi_app':
    raise AttributeError(name)
  from fastapi import FastAPI
  app = FastAPI()

  @app.get('/json')
  async def json_response():
    return {'hello': 'world'}

  @app.get('/_benchmark_pid')
  async def process_id():
    return os.getpid()

  globals()['fastapi_app'] = app
  return app