import struct
from .BxCmd import baseBxCmd
from .BxCmdCode import CMD_SEND_DYNAMIC_AREA


class CmdSendDynamicArea(baseBxCmd):
    def __init__(self, areas):
        super().__init__(CMD_SEND_DYNAMIC_AREA.group, CMD_SEND_DYNAMIC_AREA.code)
        self.processMode = 0
        self.r2 = 0
        self.delAreaIds = []
        self.areas = areas if areas else []

    def ProcessMode(self):
        """获取处理模式"""
        return self.processMode

    def SetProcessMode(self, processMode):
        """设置处理模式"""
        self.processMode = processMode

    def R2(self):
        """获取保留字r2"""
        return self.r2

    def SetR2(self, r2):
        """设置保留字r2"""
        self.r2 = r2

    def DelAreaIds(self):
        """获取删除区域ID列表"""
        return self.delAreaIds

    def SetDelAreaIds(self, delAreaIds):
        """设置删除区域ID列表"""
        self.delAreaIds = delAreaIds

    def Areas(self):
        """获取区域列表"""
        return self.areas

    def SetAreas(self, areas):
        """设置区域列表"""
        self.areas = areas

    def Build(self):
        """构建命令数据"""
        result = bytearray()
        # 写入命令组
        result.append(self.Group())
        # 写入命令
        result.append(self.Cmd())
        # 写入响应标志
        result.append(self.ReqResp())
        # 写入处理模式
        result.append(self.processMode)
        # 写入r2
        result.append(self.r2)
        
        # 写入删除区域ID
        if self.delAreaIds is None:
            result.append(0x00)
        else:
            result.append(len(self.delAreaIds))
            result.extend(self.delAreaIds)
        
        # 写入区域数量
        if self.areas is None or len(self.areas) == 0:
            result.append(0x00)
        else:
            result.append(len(self.areas))
            # 写入每个区域
            for v in self.areas:
                b = v.Build()
                result.extend(struct.pack('<h', len(b)))
                result.extend(b)
        
        return bytes(result)


# 创建CmdSendDynamicArea实例的函数
def NewBxCmdSendDynamicArea(areas):
    return CmdSendDynamicArea(areas)