"""
Beacons Router - 蓝牙信标管理接口
API endpoints for managing Bluetooth beacon configuration.
"""

import math

from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy.ext.asyncio import AsyncSession

from app.database import get_db
from app.schemas import (
    APIResponse,
    BeaconConfigCreate,
    BeaconConfigResponse,
    BeaconConfigUpdate,
    PaginatedList,
)
from app.services import beacon_service

router = APIRouter(prefix="/api/beacons", tags=["Beacons / 蓝牙信标"])


@router.get(
    "",
    response_model=APIResponse[PaginatedList[BeaconConfigResponse]],
    summary="获取信标列表 / List beacons",
)
async def list_beacons(
    status: str | None = Query(default=None, description="状态筛选 (active/inactive)"),
    search: str | None = Query(default=None, description="搜索 MAC/名称/区域"),
    page: int = Query(default=1, ge=1),
    page_size: int = Query(default=20, ge=1, le=100),
    db: AsyncSession = Depends(get_db),
):
    records, total = await beacon_service.get_beacons(
        db, page=page, page_size=page_size, status_filter=status, search=search
    )
    return APIResponse(
        data=PaginatedList(
            items=[BeaconConfigResponse.model_validate(r) for r in records],
            total=total,
            page=page,
            page_size=page_size,
            total_pages=math.ceil(total / page_size) if total else 0,
        )
    )


@router.get(
    "/{beacon_id}",
    response_model=APIResponse[BeaconConfigResponse],
    summary="获取信标详情 / Get beacon",
)
async def get_beacon(beacon_id: int, db: AsyncSession = Depends(get_db)):
    beacon = await beacon_service.get_beacon(db, beacon_id)
    if beacon is None:
        raise HTTPException(status_code=404, detail="Beacon not found")
    return APIResponse(data=BeaconConfigResponse.model_validate(beacon))


@router.post(
    "",
    response_model=APIResponse[BeaconConfigResponse],
    status_code=201,
    summary="添加信标 / Create beacon",
)
async def create_beacon(body: BeaconConfigCreate, db: AsyncSession = Depends(get_db)):
    existing = await beacon_service.get_beacon_by_mac(db, body.beacon_mac)
    if existing:
        raise HTTPException(status_code=400, detail=f"Beacon MAC {body.beacon_mac} already exists")
    beacon = await beacon_service.create_beacon(db, body)
    await db.commit()
    return APIResponse(message="Beacon created", data=BeaconConfigResponse.model_validate(beacon))


@router.put(
    "/{beacon_id}",
    response_model=APIResponse[BeaconConfigResponse],
    summary="更新信标 / Update beacon",
)
async def update_beacon(
    beacon_id: int, body: BeaconConfigUpdate, db: AsyncSession = Depends(get_db)
):
    beacon = await beacon_service.update_beacon(db, beacon_id, body)
    if beacon is None:
        raise HTTPException(status_code=404, detail="Beacon not found")
    await db.commit()
    return APIResponse(message="Beacon updated", data=BeaconConfigResponse.model_validate(beacon))


@router.delete(
    "/{beacon_id}",
    response_model=APIResponse,
    summary="删除信标 / Delete beacon",
)
async def delete_beacon(beacon_id: int, db: AsyncSession = Depends(get_db)):
    success = await beacon_service.delete_beacon(db, beacon_id)
    if not success:
        raise HTTPException(status_code=404, detail="Beacon not found")
    await db.commit()
    return APIResponse(message="Beacon deleted")