from database import Base
from datetime import datetime,date
from sqlalchemy import *
from sqlalchemy import Column, Integer, String, Date, JSON
from sqlalchemy import Column, String, Date, Enum, DateTime, func
from sqlalchemy.orm import declarative_base
import enum

class Class_info(Base):  # python里的表名字
    __tablename__ = 'class_info'  # 实际数据库的表名字
    class_id = Column(String(20)
                      , primary_key=True
                      , autoincrement=False
                      , comment='班级编号，字符串类型手动维护')

    class_code = Column(String(20)  # 对应数据库的varchar类型
                   , nullable=False
                    ,comment='班级业务编码，格式示例：2026-CS-01'# 不允许为null
                   )
    class_name = Column(String(50)
                    , nullable=False
                    ,comment='所在班级显示名称，如“2026级计算机科学与技术1班”，直接用于前端展示'
                        )
    grade_year = Column(Date
                         ,default=date.today
                          ,comment='入学年级，如2026，用数值存储比字符串更便于按年级筛选、排序'
                         )

    # teacher_id = Column(Integer
    #                      , nullable=False
    #                       ,comment='班主任外键，关联教师表，一个班级对应一名班主任'
    #                      )
    #
    # student_id = Column(Integer
    #                      , nullable=False
    #                       ,comment='学号  用来连接学生表'
    #                      )

    enrollment_date = Column(Date
                         ,default=date.today
                          ,comment='班级正式入学日期'
                         )

    status = Column(Integer
                         , nullable=False
                          ,comment='班级正式入学日期'
                         )


    tags = Column(JSON
                         , nullable=False
                          ,comment='存储多维标签，例如：["重点班", "科技特长", "2026届"]'
                         )

    is_deleted = Column(Boolean, default=0, comment="0=数据存在 1=数据逻辑删除")


    create_time = Column(DATETIME
                         , default=datetime.now  # 默认值是当前时间
                         )
    update_time = Column(DATETIME
                         , default=datetime.now  # 首次创建的时间跟更新时间一致
                         , onupdate=datetime.now
                         )

class StudentClassIntermediate(Base):
    __tablename__ = "student_class_intermediate_table"
    id = Column(String(20), primary_key=True)
    class_id= Column(String(20))
    student_id =Column(String(20))
    is_deleted= Column(Integer)
    create_time= Column(DateTime)
    update_time= Column(DateTime)




class GenderEnum(str, enum.Enum):
    FEMALE = '0'
    MALE = '1'

class StudentStatusEnum(str, enum.Enum):
    NORMAL = '0'      # 正常
    SUSPENDED = '1'   # 休学
    DROPPED = '2'     # 退学
    GRADUATED = '3'   # 毕业
    OTHER = '4'       # 其他

class EducationLevelEnum(str, enum.Enum):
    COLLEGE = '1'     # 大专
    UNDERGRADUATE = '2' # 本科
    MASTER = '3'      # 硕士
    DOCTOR = '4'      # 博士

class IsDeletedEnum(str, enum.Enum):
    ACTIVE = '0'      # 未删除
    DELETED = '1'     # 已删除

# 3. 定义学生模型类
class Student_info(Base):
    __tablename__ = "student_info"
    student_id = Column(String(20),primary_key=True, comment='学号')
    student_name = Column(String(50), nullable=False, comment='学生姓名')
    gender = Column(Enum(GenderEnum), nullable=False, comment='性别: 0=女, 1=男')
    id_card = Column(String(18), nullable=False, comment='身份证号码，收紧至18位')
    birthday = Column(Date, nullable=True, comment='出生日期')
    ethnicity = Column(String(20), nullable=True, comment='民族')
    region_id = Column(String(12), nullable=True, comment='籍贯地区编码，外键关联地区维度表(region_dimension)')
    phone = Column(String(11), nullable=True, comment='手机号码，收紧至11位')
    graduation_school = Column(String(20), nullable=True, comment='毕业学校')
    major = Column(String(20), nullable=False, comment='就读专业')
    class_id = Column(String(20), nullable=False, index=True, comment='所在班级，外键关联班级表(class_info)')
    enrollment_date = Column(Date, nullable=True, comment='入学日期')
    graduation_date = Column(Date, nullable=True, comment='毕业日期')
    student_status = Column(Enum(StudentStatusEnum), nullable=False, default=StudentStatusEnum.NORMAL,
                            comment='学籍状态')
    education_level = Column(Enum(EducationLevelEnum), nullable=False,
                             comment='学历层次：1=大专, 2=本科, 3=硕士研究生, 4=博士研究生')
    is_deleted = Column(Enum(IsDeletedEnum), nullable=False, default=IsDeletedEnum.ACTIVE,
                        comment='逻辑删除：0=未删除, 1=已删除')
    create_time = Column(DateTime, nullable=False, server_default=func.now(), comment='创建时间')
    update_time = Column(DateTime, nullable=False, server_default=func.now(), onupdate=func.now(), comment='更新时间')