# models.py
from datetime import datetime
import json
from extensions import db  # ✅ 必须从 extensions 导入

class Device(db.Model):
    __tablename__ = 'devices'

    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), unique=True, index=True)
    source = db.Column(db.String(50))

    # 快照字段
    status = db.Column(db.String(50))
    current_value = db.Column(db.String(200))
    latest_time = db.Column(db.String(50))
    json_data = db.Column(db.Text)

    check_time = db.Column(db.String(50))
    reason = db.Column(db.String(255))
    offset = db.Column(db.String(50))

    install_site = db.Column(db.String(100), default="")
    is_maintaining = db.Column(db.Boolean, default=False)
    is_hidden = db.Column(db.Boolean, default=False)

    history = db.relationship('DeviceHistory', backref='device', lazy='dynamic', cascade='all, delete-orphan')

    def to_dict(self):
        # 兼容处理 API 返回
        api_status = 'offline' if self.status in ['离线', '异常', '已离线'] else 'online'
        raw_obj = None
        if self.json_data:
            try:
                raw_obj = json.loads(self.json_data)
            except:
                raw_obj = self.json_data

        return {
            'id': self.id,
            'name': self.name,
            'source': self.source,
            'latest_time': self.latest_time,
            'status': api_status, # 前端用这个判断颜色
            'status_text': self.status, # 显示文本
            'value': self.current_value,
            'raw_json': raw_obj,
            'reason': self.reason,
            'install_site': self.install_site,
            'is_maintaining': self.is_maintaining,
            'is_hidden': self.is_hidden,
            'offset': self.offset
        }


class DeviceHistory(db.Model):
    __tablename__ = 'device_history'

    id = db.Column(db.Integer, primary_key=True)
    device_id = db.Column(db.Integer, db.ForeignKey('devices.id'))

    data_time = db.Column(db.String(50))
    status = db.Column(db.String(50))
    result_data = db.Column(db.String(200), default="")
    json_data = db.Column(db.Text)
    file_path = db.Column(db.String(255))

    recorded_at = db.Column(db.DateTime, default=datetime.now)


class MaintenanceLog(db.Model):
    __tablename__ = 'maintenance_log'
    id = db.Column(db.Integer, primary_key=True)
    device_name = db.Column(db.String(100))
    content = db.Column(db.Text)
    timestamp = db.Column(db.DateTime, default=datetime.now)

    def to_dict(self):
        return {
            'id': self.id,
            'device_name': self.device_name,
            'content': self.content,
            'timestamp': self.timestamp.strftime('%Y-%m-%d %H:%M:%S') if self.timestamp else ""
        }