from fastapi import APIRouter, Depends
from sqlalchemy.orm import Session
from sqlalchemy import and_
from typing import List, Optional
from app.models.address import AddressDB, AddressCreate, AddressUpdate, AddressInfo
from app.models.community import CommunityDB
from app.models.database import get_db
from app.api.deps import get_current_user
from app.models.user import UserDB
from app.core.response import success_response, error_response, ResponseModel

router = APIRouter()

@router.post("/", response_model=ResponseModel)
async def create_address(
    address: AddressCreate,
    db: Session = Depends(get_db),
    current_user: UserDB = Depends(get_current_user)
):
    """创建配送地址"""
    if address.is_default:
        db.query(AddressDB).filter(
            and_(
                AddressDB.user_id == current_user.userid,
                AddressDB.is_default == True
            )
        ).update({"is_default": False})
    
    db_address = AddressDB(
        user_id=current_user.userid,
        **address.model_dump()
    )
    db.add(db_address)
    db.commit()
    db.refresh(db_address)
    return success_response(data=AddressInfo.model_validate(db_address))

@router.get("/", response_model=ResponseModel)
async def get_addresses(
    community_id: Optional[int] = None,
    db: Session = Depends(get_db),
    current_user: UserDB = Depends(get_current_user)
):
    """获取用户的所有配送地址"""
    addresses = db.query(
        AddressDB,
        CommunityDB.name.label('community_name')
    ).join(
        CommunityDB,
        AddressDB.community_id == CommunityDB.id
    ).filter(
        AddressDB.user_id == current_user.userid
    )
    
    if community_id is not None:
        addresses = addresses.filter(AddressDB.community_id == community_id)
    
    addresses = addresses.all()
    
    return success_response(data=[{
        **AddressInfo.model_validate(a[0]).model_dump(),
        "community_name": a[1]
    } for a in addresses])

@router.put("/{address_id}", response_model=ResponseModel)
async def update_address(
    address_id: int,
    address: AddressUpdate,
    db: Session = Depends(get_db),
    current_user: UserDB = Depends(get_current_user)
):
    """更新配送地址"""
    db_address = db.query(AddressDB).filter(
        and_(
            AddressDB.id == address_id,
            AddressDB.user_id == current_user.userid
        )
    ).first()
    
    if not db_address:
        return error_response(code=404, message="地址不存在")
    
    update_data = address.model_dump(exclude_unset=True)
    if update_data.get("is_default"):
        db.query(AddressDB).filter(
            and_(
                AddressDB.user_id == current_user.userid,
                AddressDB.is_default == True
            )
        ).update({"is_default": False})
    
    for key, value in update_data.items():
        setattr(db_address, key, value)
    
    db.commit()
    db.refresh(db_address)
    return success_response(data=AddressInfo.model_validate(db_address))

@router.delete("/{address_id}", response_model=ResponseModel)
async def delete_address(
    address_id: int,
    db: Session = Depends(get_db),
    current_user: UserDB = Depends(get_current_user)
):
    """删除配送地址"""
    result = db.query(AddressDB).filter(
        and_(
            AddressDB.id == address_id,
            AddressDB.user_id == current_user.userid
        )
    ).delete()
    
    if not result:
        return error_response(code=404, message="地址不存在")
    
    db.commit()
    return success_response(message="地址已删除")

@router.post("/{address_id}/set-default", response_model=ResponseModel)
async def set_default_address(
    address_id: int,
    db: Session = Depends(get_db),
    current_user: UserDB = Depends(get_current_user)
):
    """设置默认地址"""
    db.query(AddressDB).filter(
        and_(
            AddressDB.user_id == current_user.userid,
            AddressDB.is_default == True
        )
    ).update({"is_default": False})
    
    db_address = db.query(AddressDB).filter(
        and_(
            AddressDB.id == address_id,
            AddressDB.user_id == current_user.userid
        )
    ).first()
    
    if not db_address:
        return error_response(code=404, message="地址不存在")
    
    db_address.is_default = True
    db.commit()
    db.refresh(db_address)
    return success_response(data=AddressInfo.model_validate(db_address))