# -*- coding: utf-8 -*-
# @Author  : {{ table.function_author }}
# @FileName: {{ underscore(table.class_name) }}_mapper.py
# @Time    : {{ datetime }}

from typing import List
from ruoyi_generator.domain.entity import {{ table.class_name }}
from ruoyi_generator.ext import db
from sqlalchemy import select, update, delete, text
from datetime import datetime

class {{ table.class_name }}Mapper:
    """{{ table.function_name }}Mapper"""

    @staticmethod
    def select_list({{ table.business_name }}: {{ table.class_name }}) -> List[{{ table.class_name }}]:
        """
        查询{{ table.function_name }}列表

        Args:
            {{ table.business_name }} ({{ table.class_name }}): {{ table.function_name }}对象

        Returns:
            List[{{ table.class_name }}]: {{ table.function_name }}列表
        """
        try:
            # 构建查询条件
            stmt = select({{ table.class_name }})

            # 添加分页条件
            if {{ table.business_name }}.page_num and {{ table.business_name }}.page_size:
                offset = ({{ table.business_name }}.page_num - 1) * {{ table.business_name }}.page_size
                stmt = stmt.offset(offset).limit({{ table.business_name }}.page_size)

            result = db.session.execute(stmt).scalars().all()
            return list(result) if result else []
        except Exception as e:
            print(f"查询{{ table.function_name }}列表出错: {e}")
            return []

    @staticmethod
    def select_by_id({{ underscore(table.pk_column.java_field) if table.pk_column }}: int) -> {{ table.class_name }}:
        """
        根据ID查询{{ table.function_name }}

        Args:
            {{ underscore(table.pk_column.java_field) if table.pk_column }} (int): {{ table.pk_column.column_comment if table.pk_column }}

        Returns:
            {{ table.class_name }}: {{ table.function_name }}对象
        """
        try:
            stmt = select({{ table.class_name }}).where({{ table.class_name }}.{{ underscore(table.pk_column.java_field) if table.pk_column }} == {{ underscore(table.pk_column.java_field) if table.pk_column }})
            result = db.session.execute(stmt).scalar_one_or_none()
            return result
        except Exception as e:
            print(f"根据ID查询{{ table.function_name }}出错: {e}")
            return None

    @staticmethod
    def insert({{ table.business_name }}: {{ table.class_name }}) -> int:
        """
        新增{{ table.function_name }}

        Args:
            {{ table.business_name }} ({{ table.class_name }}): {{ table.function_name }}对象

        Returns:
            int: 插入的记录数
        """
        try:
            # 设置创建时间和更新时间
            now = datetime.now()
            {{ table.business_name }}.create_time = now
            {{ table.business_name }}.update_time = now

            db.session.add({{ table.business_name }})
            db.session.commit()
            return 1
        except Exception as e:
            db.session.rollback()
            print(f"新增{{ table.function_name }}出错: {e}")
            return 0

    @staticmethod
    def update({{ table.business_name }}: {{ table.class_name }}) -> int:
        """
        修改{{ table.function_name }}

        Args:
            {{ table.business_name }} ({{ table.class_name }}): {{ table.function_name }}对象

        Returns:
            int: 更新的记录数
        """
        try:
            # 设置更新时间
            {{ table.business_name }}.update_time = datetime.now()

            # 使用ORM方式更新数据
            db.session.merge({{ table.business_name }})
            db.session.commit()
            return 1
        except Exception as e:
            db.session.rollback()
            print(f"修改{{ table.function_name }}出错: {e}")
            return 0

    @staticmethod
    def delete_by_ids(ids: List[int]) -> int:
        """
        批量删除{{ table.function_name }}

        Args:
            ids (List[int]): ID列表

        Returns:
            int: 删除的记录数
        """
        try:
            stmt = delete({{ table.class_name }}).where({{ table.class_name }}.{{ underscore(table.pk_column.java_field) if table.pk_column }}.in_(ids))
            result = db.session.execute(stmt)
            db.session.commit()
            return result.rowcount
        except Exception as e:
            db.session.rollback()
            print(f"批量删除{{ table.function_name }}出错: {e}")
            return 0