text: import config  # isort:skip
  
  import logging
  import typing as t
  
  from fastapi import Cookie, Depends, FastAPI, Form, HTTPException, status
  from fastapi.requests import Request
  from fastapi.responses import RedirectResponse, StreamingResponse
  from fastapi.staticfiles import StaticFiles
  from fastapi.templating import Jinja2Templates
  
  import auth
  from stream_service import StreamService
  
  
  app = FastAPI()
  
  app.mount("/static", StaticFiles(directory="static"), name="static")
  
  templates = Jinja2Templates(directory="templates")
  
  stream_service = StreamService()
  
  
  @app.on_event("startup")
  def startup_event():
      global stream_service
      stream_service.run()
  
      auth.remove_expired_sessions()
  
  
  @app.on_event("shutdown")
  def shutdown_event():
      global stream_service
      stream_service.stop()
  
  
  @app.get("/")
  async def index(request: Request, allowed: bool = Depends(auth.is_valid_session)):
      if not allowed:
          return RedirectResponse("/login")
      return templates.TemplateResponse("index.html", {"request": request})
  
  
  @app.post("/login")
  async def login(
      username: t.Optional[str] = Form(None), password: t.Optional[str] = Form(None)
  ):
      if not (all((username, password)) and auth.is_user(username, password)):
          raise HTTPException(
              status_code=status.HTTP_401_UNAUTHORIZED,
              detail="Incorrect username or password",
          )
      resp = RedirectResponse("/", status_code=303)
      resp.set_cookie(key="session_token", value=auth.create_session(username))
      return resp
  
  
  @app.get("/login")
  async def login_page(request: Request):
      return templates.TemplateResponse("login.html", {"request": request})
  
  
  @app.get("/logout")
  async def login_page(session_token: t.Optional[str] = Cookie(None)):
      auth.clear_session(session_token)
      return RedirectResponse("/login")
  
  
  @app.get("/stream.mjpg")
  async def stream(allowed: bool = Depends(auth.is_valid_session)):
      global stream_service
  
      if not allowed:
          return RedirectResponse("/login")
  
      return StreamingResponse(
          stream_service.generate_frames(),
          headers={
              "Age": "0",
              "Cache-Control": "no-cache, private",
              "Pragma": "no-cache",
              "Content-Type": "multipart/x-mixed-replace; boundary=FRAME",
          },
      )
  