from __future__ import annotations

import asyncio
from contextlib import asynccontextmanager

from fastapi import FastAPI
from fastapi.staticfiles import StaticFiles

from app.routers import biomass, ingest
from app.services.action_watch import run_action_watch_loop
from app.settings import get_settings


@asynccontextmanager
async def lifespan(app: FastAPI):
    s = get_settings()
    s.media_root.mkdir(parents=True, exist_ok=True)
    s.stream_tmp_dir.mkdir(parents=True, exist_ok=True)
    watch_task: asyncio.Task[None] | None = None
    if s.action_watch_dir is not None:
        watch_task = asyncio.create_task(run_action_watch_loop(s))
    yield
    if watch_task is not None:
        watch_task.cancel()
        try:
            await watch_task
        except asyncio.CancelledError:
            pass


app = FastAPI(title="Fish API", lifespan=lifespan)
app.include_router(ingest.router)
app.include_router(biomass.router)

_settings = get_settings()
_settings.media_root.mkdir(parents=True, exist_ok=True)
app.mount(
    "/media",
    StaticFiles(directory=str(_settings.media_root)),
    name="media",
)


@app.get("/")
async def root():
    return {
        "service": "fish-api",
        "docs": "/docs",
        "ingest": "/api/v1/ingest/",
        "biomass_camera": "/api/v1/biomass/real/camera/",
        "biomass_health": "/api/v1/biomass/health/result/",
    }