from datetime import datetime
from app import db

class Device(db.Model):
    """设备模型"""
    __tablename__ = 'device'

    device_id = db.Column(db.Integer, primary_key=True)
    machine_code = db.Column(db.String(64), unique=True, nullable=False, index=True)
    license_id = db.Column(db.Integer, db.ForeignKey('license.license_id'), nullable=True)
    product_id = db.Column(db.String(32), db.ForeignKey('product.product_id'), nullable=False)
    software_version = db.Column(db.String(16), nullable=True)
    ip_address = db.Column(db.String(45), nullable=True)  # 添加IP地址字段
    status = db.Column(db.Integer, nullable=False, default=1)  # 0=禁用, 1=正常
    activate_time = db.Column(db.DateTime, nullable=True)
    last_verify_time = db.Column(db.DateTime, nullable=True)
    create_time = db.Column(db.DateTime, default=datetime.utcnow)
    update_time = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    def __init__(self, **kwargs):
        super(Device, self).__init__(**kwargs)

    def is_active(self):
        """设备是否激活"""
        return self.status == 1

    def is_online(self, days=7):
        """设备是否在线（最近N天内有验证记录）"""
        if not self.last_verify_time:
            return False
        return (datetime.utcnow() - self.last_verify_time).days <= days

    def activate(self, license_id, software_version):
        """激活设备"""
        self.license_id = license_id
        self.software_version = software_version
        self.status = 1
        self.activate_time = datetime.utcnow()
        self.last_verify_time = datetime.utcnow()
        db.session.commit()

    def deactivate(self):
        """禁用设备"""
        self.status = 0
        db.session.commit()

    def update_verify_time(self):
        """更新验证时间"""
        self.last_verify_time = datetime.utcnow()
        db.session.commit()

    def get_license_info(self):
        """获取关联的卡密信息"""
        if self.license:
            return {
                'license_key': self.license.license_key,
                'type': self.license.type,
                'type_name': '试用' if self.license.type == 0 else '正式',
                'expire_time': self.license.expire_time.strftime('%Y-%m-%d %H:%M:%S') if self.license.expire_time else None
            }
        return None

    def get_uptime_days(self):
        """获取使用天数"""
        if not self.activate_time:
            return 0
        return (datetime.utcnow() - self.activate_time).days

    def to_dict(self, include_license=False):
        """转换为字典"""
        data = {
            'device_id': self.device_id,
            'machine_code': self.machine_code,
            'license_id': self.license_id,
            'license_key': self.license.license_key if self.license else None,
            'product_id': self.product_id,
            'product_name': self.product.product_name if self.product else None,
            'software_version': self.software_version,
            'ip_address': self.ip_address,  # 添加IP地址字段
            'status': self.status,
            'status_name': '正常' if self.status == 1 else ('离线' if self.status == 2 else '禁用'),
            'is_online': self.is_online(),
            'activate_time': self.activate_time.strftime('%Y-%m-%d %H:%M:%S') if self.activate_time else None,
            'last_verify_time': self.last_verify_time.strftime('%Y-%m-%d %H:%M:%S') if self.last_verify_time else None,
            'uptime_days': self.get_uptime_days(),
            'create_time': self.create_time.strftime('%Y-%m-%d %H:%M:%S') if self.create_time else None,
            'update_time': self.update_time.strftime('%Y-%m-%d %H:%M:%S') if self.update_time else None
        }

        if include_license:
            data['license_info'] = self.get_license_info()

        return data

    def __repr__(self):
        return f'<Device {self.machine_code}>'