"""
FCM 推送 API — Android 设备 Token 管理

提供设备推送令牌的注册和注销接口。
"""
from __future__ import annotations

import logging

from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel, Field

from app.api.auth import get_current_user
from app.core.database import SessionLocal
from app.models.fcm_token import FcmToken
from app.models.user import User

logger = logging.getLogger(__name__)

router = APIRouter(prefix="/api/v1/fcm", tags=["fcm"])


class FcmRegisterRequest(BaseModel):
    token: str = Field(..., min_length=32, max_length=512, description="FCM/APNs 设备令牌")
    platform: str = Field(default="android", description="android / ios / web")


@router.post("/register")
async def register_fcm_token(
    req: FcmRegisterRequest,
    current_user: User = Depends(get_current_user),
):
    """注册设备推送 Token。同一 Token 多次注册会更新绑定用户和时间。"""
    db = SessionLocal()
    try:
        existing = db.query(FcmToken).filter(FcmToken.token == req.token).first()

        if existing:
            existing.user_id = current_user.id
            existing.platform = req.platform
            db.commit()
            logger.info("FCM Token 已更新: user=%s platform=%s", current_user.id, req.platform)
            return {"status": "updated", "id": str(existing.id)}

        fcm = FcmToken(
            user_id=current_user.id,
            token=req.token,
            platform=req.platform,
        )
        db.add(fcm)
        db.commit()
        db.refresh(fcm)
        logger.info("FCM Token 已注册: user=%s platform=%s", current_user.id, req.platform)
        return {"status": "registered", "id": str(fcm.id)}
    finally:
        db.close()


@router.delete("/unregister")
async def unregister_fcm_token(
    token: str,
    current_user: User = Depends(get_current_user),
):
    """注销设备推送 Token。"""
    db = SessionLocal()
    try:
        fcm = (
            db.query(FcmToken)
            .filter(FcmToken.token == token, FcmToken.user_id == current_user.id)
            .first()
        )
        if fcm:
            db.delete(fcm)
            db.commit()
            logger.info("FCM Token 已注销: user=%s", current_user.id)
            return {"status": "deleted"}
        return {"status": "not_found"}
    finally:
        db.close()