from sqlalchemy import Column, DateTime, ForeignKey, Integer, String, Text
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func

from server.models import Base


class User(Base):
    """用户模型"""

    __tablename__ = "users"

    id = Column(Integer, primary_key=True, autoincrement=True)
    username = Column(String, nullable=False, unique=True, index=True)  # 显示名称，2-20字符
    user_id = Column(String, nullable=False, unique=True, index=True)  # 登录ID，根据用户名生成
    phone_number = Column(String, nullable=True, unique=True, index=True)  # 手机号，可选登录方式
    avatar = Column(String, nullable=True)  # 头像URL
    password_hash = Column(String, nullable=False)
    role = Column(String, nullable=False, default="user")  # 角色: superadmin, admin, user
    created_at = Column(DateTime, default=func.now())
    last_login = Column(DateTime, nullable=True)

    # 登录失败限制相关字段
    login_failed_count = Column(Integer, nullable=False, default=0)  # 登录失败次数
    last_failed_login = Column(DateTime, nullable=True)  # 最后一次登录失败时间
    login_locked_until = Column(DateTime, nullable=True)  # 锁定到什么时候

    # 关联操作日志
    operation_logs = relationship("OperationLog", back_populates="user")

    def to_dict(self, include_password=False):
        result = {
            "id": self.id,
            "username": self.username,
            "user_id": self.user_id,
            "phone_number": self.phone_number,
            "avatar": self.avatar,
            "role": self.role,
            "created_at": self.created_at.isoformat() if self.created_at else None,
            "last_login": self.last_login.isoformat() if self.last_login else None,
            "login_failed_count": self.login_failed_count,
            "last_failed_login": self.last_failed_login.isoformat() if self.last_failed_login else None,
            "login_locked_until": self.login_locked_until.isoformat() if self.login_locked_until else None,
        }
        if include_password:
            result["password_hash"] = self.password_hash
        return result

    def is_login_locked(self):
        """检查用户是否处于登录锁定状态"""
        if self.login_locked_until is None:
            return False
        from datetime import datetime

        return datetime.now() < self.login_locked_until

    def get_remaining_lock_time(self):
        """获取剩余锁定时间（秒）"""
        if not self.is_login_locked():
            return 0
        from datetime import datetime

        return int((self.login_locked_until - datetime.now()).total_seconds())

    def calculate_lock_duration(self):
        """根据失败次数计算锁定时长（秒）"""
        if self.login_failed_count < 10:
            return 0

        # 从第10次失败开始，等待时间从1秒开始，每次翻倍
        wait_seconds = 2 ** (self.login_failed_count - 10)

        # 最大锁定时间：365天
        max_seconds = 365 * 24 * 60 * 60
        return min(wait_seconds, max_seconds)

    def increment_failed_login(self):
        """增加登录失败次数并设置锁定时间"""
        from datetime import datetime, timedelta

        self.login_failed_count += 1
        self.last_failed_login = datetime.now()

        lock_duration = self.calculate_lock_duration()
        if lock_duration > 0:
            self.login_locked_until = datetime.now() + timedelta(seconds=lock_duration)

    def reset_failed_login(self):
        """重置登录失败相关字段"""
        self.login_failed_count = 0
        self.last_failed_login = None
        self.login_locked_until = None


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

    __tablename__ = "operation_logs"

    id = Column(Integer, primary_key=True, autoincrement=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
    operation = Column(String, nullable=False)
    details = Column(Text, nullable=True)
    ip_address = Column(String, nullable=True)
    timestamp = Column(DateTime, default=func.now())

    # 关联用户
    user = relationship("User", back_populates="operation_logs")

    def to_dict(self):
        return {
            "id": self.id,
            "user_id": self.user_id,
            "operation": self.operation,
            "details": self.details,
            "ip_address": self.ip_address,
            "timestamp": self.timestamp.isoformat() if self.timestamp else None,
        }