#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
动作点数据模型
基于现有的vwed_operate_point表结构进行扩展
动作点和库位是同一个概念
"""

from sqlalchemy import Column, String, Integer, Boolean, Text, DateTime, ForeignKey, Enum
from sqlalchemy.orm import relationship
from sqlalchemy.dialects.mysql import CHAR
from .base import BaseModel
from .storage_area import StorageAreaType


class OperatePoint(BaseModel):
    """
    动作点数据模型
    继承现有的vwed_operate_point表结构并扩展
    """
    __tablename__ = 'vwed_operate_point'
    
    id = Column(CHAR(64), primary_key=True, comment='动作点ID')
    station_name = Column(String(64), nullable=False, comment='动作站点名称')
    # storage_location_name = Column(String(64), nullable=False, comment='库位名称')
    scene_id = Column(String(64), nullable=False, comment='场景ID')
    
    # 原有字段
    # is_occupied = Column(Boolean, nullable=False, default=False, comment='是否占用')
    # is_locked = Column(Boolean, nullable=False, default=False, comment='是否锁定')
    is_disabled = Column(Boolean, nullable=False, default=False, comment='是否禁用')
    # is_empty_tray = Column(Boolean, nullable=False, default=False, comment='是否空托盘')
    content = Column(String(100), nullable=False, default='', comment='内容')
    tags = Column(String(100), nullable=False, default='', comment='标签')
    
    # 库区关联
    storage_area_id = Column(CHAR(64), ForeignKey('vwed_storage_area.id'), nullable=True, comment='所属库区ID')
    
    # 库区类型
    storage_area_type = Column(Enum(StorageAreaType), nullable=True, comment='库区类型')
    
    # 库区名称
    area_name = Column(String(64), nullable=True, comment='库区名称')
    
    # 动作点属性
    max_layers = Column(Integer, nullable=False, default=1, comment='最大层数')
    current_layers = Column(Integer, nullable=False, default=0, comment='当前使用层数')
    
    # 动作点位置信息
    position_x = Column(Integer, comment='X坐标', nullable=True)
    position_y = Column(Integer, comment='Y坐标', nullable=True)
    position_z = Column(Integer, comment='Z坐标', nullable=True)
    
    # 动作点配置
    description = Column(Text, comment='动作点描述')
    
    # 关联关系
    storage_area = relationship("StorageArea", back_populates="operate_points")
    layers = relationship(
        "OperatePointLayer", 
        back_populates="operate_point", 
        cascade="all, delete-orphan",
        order_by="OperatePointLayer.layer_index"
    )
    
    def __repr__(self):
        return f"<OperatePoint(id={self.id}, station_name={self.station_name}, storage_area_id={self.storage_area_id}, storage_area_type={self.storage_area_type}, area_name={self.area_name})>"
    
    def get_available_layers(self):
        """获取可用层数"""
        return self.max_layers - self.current_layers
    
    def get_layer_usage_rate(self):
        """获取层使用率"""
        if self.max_layers == 0:
            return 0.0
        return (self.current_layers / self.max_layers) * 100.0
    
    def is_full(self):
        """是否已满"""
        return self.current_layers >= self.max_layers
    
    def is_empty(self):
        """是否为空"""
        return self.current_layers == 0
    
    def can_store_goods(self):
        """是否可以存放货物"""
        return (not self.is_disabled and 
                not self.is_full() and 
                self.max_layers > 0)
    
    def can_retrieve_goods(self):
        """是否可以取货"""
        return (not self.is_disabled and 
                not self.is_empty())
    
    def get_occupied_layers(self):
        """获取有货物的层列表"""
        return [layer for layer in self.layers if layer.is_occupied]
    
    def get_empty_layers(self):
        """获取空层列表"""
        return [layer for layer in self.layers if not layer.is_occupied]
    
    def has_storage_area(self):
        """是否属于某个库区"""
        return self.storage_area_id is not None
    
    def get_storage_area_info(self):
        """获取库区信息"""
        if self.storage_area_id is None:
            return None
        return self.storage_area 
    
    def is_dense_storage(self):
        """是否为密集库区类型"""
        return self.storage_area_type == StorageAreaType.DENSE
    
    def is_general_storage(self):
        """是否为一般库区类型"""
        return self.storage_area_type == StorageAreaType.GENERAL
    
    def get_storage_area_display_name(self):
        """获取库区显示名称"""
        return self.area_name or "未分配库区"