from datetime import datetime, timezone

from fastapi.logger import logger
from sqlalchemy import and_

from apps.constants.message import PAGE_SIZE
from apps.forms.member_level import MemberLevelForm
from apps.models.member_level import MemberLevel
from extensions import get_db_session
from utils import R
from utils.security import get_user_id
from utils.request import like_contains


# 查询会员登记分页数据

def get_member_level_page(request):
    db = get_db_session()
    # 页码
    page = int(request.query_params.get("pageNo", 1))
    # 每页数
    limit = int(request.query_params.get("pageSize", PAGE_SIZE))
    # 实例化查询对象
    query = db.query(MemberLevel).filter(MemberLevel.is_delete == 0)
    # 会员等级名称
    name = request.query_params.get('name')
    if name:
        query = query.filter(MemberLevel.name.like(like_contains(name), escape='\\'))
    # 排序
    query = query.order_by(MemberLevel.sort.asc())
    # 记录总数
    count = query.count()
    # 分页查询
    member_level_list = query.limit(limit).offset((page - 1) * limit).all()
    # 若当前页超出末页（数据被并发删除），自动回退到第一页
    if page > 1 and not member_level_list:
        page = 1
        count = query.count()
        member_level_list = query.limit(limit).offset(0).all()
    # 实例化结果
    result = []
    # 遍历数据源
    if len(member_level_list) > 0:
        for item in member_level_list:
            # 对象转字典
            data = item.to_dict()
            # 加入列表
            result.append(data)
    # 返回结果
    return R.ok(data=result, count=count)
# 根据会员等级ID查询详情

def get_member_level_detail(member_level_id):
    db = get_db_session()
    # 根据ID查询会员等级
    member_level = db.query(MemberLevel).filter(
        and_(MemberLevel.id == member_level_id, MemberLevel.is_delete == 0)).first()
    # 查询结果判空
    if not member_level:
        return None
    # 对象转字典
    data = member_level.to_dict()
    # 返回结果
    return data
# 添加会员等级

def add_member_level(request, data: MemberLevelForm):
    db = get_db_session()
    # 唯一性校验
    if db.query(MemberLevel).filter(and_(MemberLevel.name == data.name, MemberLevel.is_delete == 0)).first():
        return R.failed("会员等级名称不能重复")
    # 表单数据赋值给对象
    member_level = MemberLevel(**data.model_dump(exclude={'id'}))
    member_level.create_user = get_user_id(request)
    # 插入数据
    member_level.save()
    # 返回结果
    return R.ok(msg="添加成功")


# 更新会员等级

def update_member_level(request, data: MemberLevelForm):
    db = get_db_session()
    # 记录ID判空
    if not data.id or data.id <= 0:
        return R.failed("记录ID不能为空")
    # 唯一性校验（排除自身）
    if db.query(MemberLevel).filter(and_(MemberLevel.name == data.name, MemberLevel.id != data.id, MemberLevel.is_delete == 0)).first():
        return R.failed("会员等级名称不能重复")

    # 根据ID查询记录
    member_level = db.query(MemberLevel).filter(and_(MemberLevel.id == data.id, MemberLevel.is_delete == 0)).first()
    # 查询结果判空
    if not member_level:
        return R.failed("记录不存在")
    # 构造更新数据（排除 id）
    updData = data.model_dump(exclude={'id'})
    updData['update_user'] = get_user_id(request)
    updData['update_time'] = datetime.now(tz=timezone.utc)
    result = db.query(MemberLevel).filter_by(id=data.id).update(updData)
    # 提交数据
    if not result:
        return R.failed("更新失败")
    # 返回结果
    return R.ok(msg="更新成功")
# 删除会员等级

def delete_member_level(member_level_id):
    return MemberLevel.batch_delete_r(member_level_id)
# 获取会员等级列表

def get_member_level_list():
    db = get_db_session()
    member_level_list = db.query(MemberLevel).filter(MemberLevel.is_delete == 0).order_by(MemberLevel.sort.asc()).all()
    # 实例化对象
    result = []
    # 遍历数据源
    for v in member_level_list:
        # 对象转字典
        item = v.to_dict()
        # 加入列表
        result.append(item)
    # 返回结果
    return result