from sqlalchemy import Column, Integer, String, DateTime, ForeignKey, func, Table, Index, Text
from sqlalchemy.orm import relationship
from sqlalchemy.ext.declarative import declarative_base
from datetime import datetime

Base = declarative_base()


class Role(Base):
    """角色数据库模型"""

    __tablename__ = "role"
    id = Column(Integer, primary_key=True, index=True, comment="角色ID")
    name = Column(String(50), nullable=False, unique=True, comment="角色名称")
    createtime = Column(DateTime, default=datetime.utcnow, comment="创建时间")
    updatetime = Column(
        DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, comment="更新时间"
    )
    creator = Column(String(50), nullable=True, comment="创建人")

    # 关联到User
    users = relationship("User", back_populates="role_rel")
    # 关联到Permission（多对多）
    permissions = relationship(
        "Permission",
        secondary="role_permission",
        back_populates="roles"
    )


class User(Base):
    """用户数据库模型"""

    __tablename__ = "users"
    id = Column(Integer, primary_key=True, index=True)
    username = Column(String(50), unique=True, nullable=False, comment="登录名")
    nickname = Column(String(50), nullable=False, comment="昵称")
    email = Column(String(50), nullable=True, comment="电子邮箱")
    phone = Column(String(11), nullable=True, comment="手机号码")
    wx_openid = Column(String(100), nullable=True, comment="微信OpenID")
    password_hash = Column(String(128), nullable=False, comment="密码哈希值")
    avatar = Column(String(255), nullable=True, comment="头像路径")
    role_id = Column(Integer, ForeignKey("role.id"), default=2, comment="角色ID")
    createtime = Column(DateTime, default=datetime.utcnow, comment="创建时间")
    updatetime = Column(
        DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, comment="更新时间"
    )
    lastlogintime = Column(DateTime, comment="最后登录时间")

    # 关联到Role
    role_rel = relationship("Role", back_populates="users")


class Permission(Base):
    """权限数据库模型"""

    __tablename__ = "permission"
    id = Column(Integer, primary_key=True, index=True, comment="权限ID")
    name = Column(String(100), nullable=False, comment="权限名称")
    code = Column(String(100), nullable=False, unique=True, comment="权限编码")
    parentid = Column(Integer, default=0, comment="父权限ID（0表示顶级模块）")
    route = Column(String(255), nullable=True, comment="前端路由路径")
    description = Column(String(255), nullable=True, comment="权限描述")
    sort = Column(Integer, default=0, comment="排序号（升序排列）")
    createtime = Column(DateTime, default=datetime.utcnow, comment="创建时间")
    updatetime = Column(
        DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, comment="更新时间"
    )

    # 关联到Role（多对多）
    roles = relationship(
        "Role",
        secondary="role_permission",
        back_populates="permissions"
    )


# 角色权限关联表（多对多）
role_permission = Table(
    "role_permission",
    Base.metadata,
    Column("role_id", Integer, ForeignKey("role.id"), primary_key=True, comment="角色ID"),
    Column("permission_id", Integer, ForeignKey("permission.id"), primary_key=True, comment="权限ID")
)


class SystemSetting(Base):
    """系统设置数据库模型"""

    __tablename__ = "system_setting"
    id = Column(Integer, primary_key=True, index=True, comment="设置ID")
    key = Column(String(100), nullable=False, unique=True, comment="设置键名")
    value = Column(String(2000), nullable=False, comment="设置值")
    type = Column(String(20), default="string", comment="类型：string/image/select/boolean")
    options = Column(String(500), nullable=True, comment="下拉选项（用|分隔）")
    description = Column(String(255), nullable=True, comment="设置描述")
    createtime = Column(DateTime, default=datetime.utcnow, comment="创建时间")
    updatetime = Column(
        DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, comment="更新时间"
    )


class LoginLog(Base):
    """登录日志"""

    __tablename__ = "login_log"
    id = Column(Integer, primary_key=True, index=True, comment="日志ID")
    username = Column(String(50), nullable=False, comment="用户名")
    login_time = Column(DateTime, default=datetime.utcnow, comment="登录时间")
    ip_address = Column(String(50), nullable=True, comment="IP地址")
    user_agent = Column(String(500), nullable=True, comment="User-Agent")
    status = Column(String(20), nullable=False, comment="状态: success/failure")
    failure_reason = Column(String(255), nullable=True, comment="失败原因")


Index("ix_login_log_login_time", LoginLog.login_time)
Index("ix_login_log_username", LoginLog.username)
Index("ix_login_log_status", LoginLog.status)


class OperationLog(Base):
    """操作日志"""

    __tablename__ = "operation_log"
    id = Column(Integer, primary_key=True, index=True, comment="日志ID")
    user_id = Column(Integer, nullable=False, comment="用户ID")
    username = Column(String(50), nullable=False, comment="用户名")
    action_type = Column(String(20), nullable=False, comment="操作类型: create/update/delete")
    target_type = Column(String(50), nullable=False, comment="目标类型: user/role/permission/setting")
    target_id = Column(Integer, nullable=True, comment="目标ID")
    target_name = Column(String(100), nullable=True, comment="目标名称")
    detail = Column(Text, nullable=True, comment="变更详情(JSON)")
    ip_address = Column(String(50), nullable=True, comment="IP地址")
    user_agent = Column(String(500), nullable=True, comment="User-Agent")
    createtime = Column(DateTime, default=datetime.utcnow, comment="创建时间")


Index("ix_operation_log_createtime", OperationLog.createtime)
Index("ix_operation_log_username", OperationLog.username)
Index("ix_operation_log_action_type", OperationLog.action_type)
Index("ix_operation_log_target_type", OperationLog.target_type)