"""StackPilot backend — FastAPI application entry point."""
from __future__ import annotations

import asyncio
import logging
from contextlib import asynccontextmanager

from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import JSONResponse
from sqlmodel import Session

from config import settings
from database import engine, init_db
from docker_client import DockerError
from routers import (
    agents,
    audit,
    auth,
    backups,
    destinations,
    editor,
    files,
    images,
    networks,
    ports,
    schedules,
    settings as settings_router,
    stacks,
    system,
    templates,
    volumes,
    ws,
)
from services import schedule_service, update_service

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger("stackpilot")


@asynccontextmanager
async def lifespan(app: FastAPI):
    init_db()
    # Register stacks that already exist on disk.
    try:
        with Session(engine) as session:
            stacks.sync_discovered_stacks(session)
    except Exception as exc:  # noqa: BLE001
        logger.warning("Stack discovery failed: %s", exc)
    update_task = asyncio.create_task(update_service.background_loop())
    schedule_task = asyncio.create_task(schedule_service.scheduler_loop())
    logger.info("StackPilot backend ready on port %s", settings.PORT)
    yield
    update_task.cancel()
    schedule_task.cancel()


app = FastAPI(title="StackPilot", version="0.17.0", lifespan=lifespan)

app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.CORS_ORIGINS,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


@app.exception_handler(DockerError)
async def docker_error_handler(_request: Request, exc: DockerError):
    return JSONResponse(
        status_code=502,
        content={"error": exc.error, "detail": exc.detail},
    )


app.include_router(auth.router)
app.include_router(stacks.router)
app.include_router(system.router)
app.include_router(volumes.router)
app.include_router(editor.router)
app.include_router(files.router)
app.include_router(images.router)
app.include_router(ports.router)
app.include_router(templates.router)
app.include_router(audit.router)
app.include_router(settings_router.router)
app.include_router(backups.router)
app.include_router(destinations.router)
app.include_router(schedules.router)
app.include_router(networks.router)
app.include_router(agents.router)
app.include_router(ws.router)


@app.get("/api/health")
def health() -> dict:
    return {"status": "ok"}