# ===========================================
# 班级操行分管理系统 - 后端服务
# 
# 开发者: Canglan
# 联系方式: admin@sea-studio.top
# 版权归属: Sea Network Technology Studio
# 许可证: MIT License
# 
# 版权所有 © Sea Network Technology Studio
# ===========================================

from typing import Dict, Any, List, Optional

from models.subject import SubjectModel
from utils.logger import get_logger

logger = get_logger(__name__)


class SubjectService:
    """科目服务"""
    
    @staticmethod
    async def get_subjects(is_active: Optional[bool] = None) -> Dict[str, Any]:
        """获取科目列表"""
        subjects = await SubjectModel.get_all(is_active=is_active)
        
        return {
            "subjects": subjects,
            "total": len(subjects)
        }
    
    @staticmethod
    async def create_subject(
        subject_name: str,
        subject_code: Optional[str],
        sort_order: int = 0
    ) -> Dict[str, Any]:
        """创建科目"""
        # 检查是否已存在
        existing = await SubjectModel.get_by_name(subject_name)
        if existing:
            return {"success": False, "message": "科目名称已存在"}
        
        subject_id = await SubjectModel.create(
            subject_name=subject_name,
            subject_code=subject_code,
            sort_order=sort_order
        )
        
        if subject_id:
            logger.info(f"创建科目: {subject_name}")
            return {"success": True, "subject_id": subject_id}
        else:
            return {"success": False, "message": "创建科目失败"}
    
    @staticmethod
    async def update_subject(subject_id: int, **kwargs) -> Dict[str, Any]:
        """更新科目"""
        result = await SubjectModel.update(subject_id, **kwargs)
        
        if result:
            logger.info(f"更新科目: {subject_id}")
            return {"success": True}
        else:
            return {"success": False, "message": "更新科目失败"}
    
    @staticmethod
    async def delete_subject(subject_id: int) -> Dict[str, Any]:
        """删除科目（真正删除记录）"""
        # 检查科目是否有关联数据
        has_data = await SubjectModel.has_related_data(subject_id)
        if has_data:
            return {"success": False, "message": "该科目下已有作业数据，无法删除"}
        
        result = await SubjectModel.delete(subject_id)
        
        if result:
            logger.info(f"删除科目: {subject_id}")
            return {"success": True}
        else:
            return {"success": False, "message": "删除科目失败"}