import asyncio
import logging
from contextlib import asynccontextmanager
from typing import Optional, List

from fastapi import FastAPI, HTTPException
from sqlalchemy import select

from app.core.discovery import DiscoveryService
from app.core.state import state_manager
from app.drivers.wiz import WizDriver
from app.core.database import init_db, async_session
from app.models.device import GroupModel, DeviceModel, GroupCreateSchema

logging.basicConfig(
    level=logging.INFO, format="%(asctime)s | %(levelname)s | %(message)s"
)
logger = logging.getLogger(__name__)

discovery = DiscoveryService()
wiz = WizDriver()


@asynccontextmanager
async def lifespan(app: FastAPI):
    """Жизненный цикл приложения."""
    # 1. Инициализация БД (создание таблиц)
    await init_db()
    logger.info("🗄️ База данных инициализирована")

    # 2. Загрузка групп из БД в память
    async with async_session() as session:
        result = await session.execute(select(GroupModel))
        groups = result.scalars().all()
        for g in groups:
            state_manager.groups[g.id] = g
            logger.info(f"📂 Загружена группа: {g.name} (MACs: {g.device_ids})")

    async def periodic_discovery():
        logger.info("🚀 Запущена фоновая служба Discovery")

        while True:
            try:
                found_devices = await discovery.scan_network()

                for dev_data in found_devices:
                    state_manager.update_device(dev_data)

                logger.info(
                    f"📡 Сеть просканирована. Устройств онлайн: {len(state_manager.devices)}"
                )
            except Exception as e:
                logger.error(f"❌ Ошибка в цикле Discovery: {e}")
            await asyncio.sleep(600)

    discovery_task = asyncio.create_task(periodic_discovery())

    yield

    discovery_task.cancel()
    logger.info("🛑 Фоновая служба Discovery остановлена")


app = FastAPI(title="Ignis Core API", lifespan=lifespan)

# --- Эндпоинты Устройств ---


@app.get("/devices")
async def get_all_devices():
    """Список всех обнаруженных ламп."""
    return state_manager.devices


@app.get("/groups")
async def get_groups():
    """Список всех созданных люстр/групп."""
    return state_manager.groups


@app.get("/scenes")
async def get_scenes():
    return wiz.SCENES


@app.post("/groups")
async def create_group(data: GroupCreateSchema):
    async with async_session() as session:
        existing = await session.get(GroupModel, data.id)
        if existing:
            raise HTTPException(status_code=400, detail="Группа с таким ID уже есть")

        # Берем данные из схемы
        new_group = GroupModel(id=data.id, name=data.name, device_ids=data.macs)
        session.add(new_group)
        await session.commit()

        state_manager.groups[data.id] = new_group

    return {"status": "created", "group": data.name}


@app.post("/control/device/{device_id}")
async def control_device(
    device_id: str,
    state: Optional[bool] = None,
    brightness: Optional[int] = None,
    scene: Optional[str] = None,
    temp: Optional[int] = None,
    r: Optional[int] = None,
    g: Optional[int] = None,
    b: Optional[int] = None,
):
    device = state_manager.devices.get(device_id)
    if not device:
        raise HTTPException(status_code=404, detail="Лампа не в сети")

    params = {}
    if state is not None:
        params["state"] = state
    if brightness is not None:
        params["dimming"] = brightness

    if scene and scene in wiz.SCENES:
        params["sceneId"] = wiz.SCENES[scene]
    elif temp is not None:
        params["temp"] = temp
    elif r is not None or g is not None or b is not None:
        params["r"], params["g"], params["b"] = r or 0, g or 0, b or 0

    if not params:
        raise HTTPException(status_code=400, detail="Никаких команд не передано")

    result = await wiz.set_pilot(device.ip, params)
    return {"device_id": device_id, "applied": params, "result": result}


@app.post("/control/group/{group_id}")
async def control_group(
    group_id: str,
    state: Optional[bool] = None,
    brightness: Optional[int] = None,
    scene: Optional[str] = None,
    temp: Optional[int] = None,
    r: Optional[int] = None,
    g: Optional[int] = None,
    b: Optional[int] = None,
):
    ips = state_manager.get_group_ips(group_id)
    if not ips:
        raise HTTPException(status_code=404, detail="Группа не найдена или оффлайн")

    params = {}
    if state is not None:
        params["state"] = state
    if brightness is not None:
        params["dimming"] = brightness

    if scene and scene in wiz.SCENES:
        params["sceneId"] = wiz.SCENES[scene]
    elif temp is not None:
        params["temp"] = temp
    elif r is not None or g is not None or b is not None:
        params["r"], params["g"], params["b"] = r or 0, g or 0, b or 0

    if not params:
        raise HTTPException(status_code=400, detail="Никаких команд не передано")

    # Используем return_exceptions=True, чтобы ошибки одной лампы не ломали всё
    tasks = [wiz.set_pilot(ip, params) for ip in ips]
    await asyncio.gather(*tasks, return_exceptions=True)

    return {"status": "ok", "applied": params, "sent_to": ips}


if __name__ == "__main__":
    import uvicorn

    uvicorn.run(app, host="0.0.0.0", port=8000)