from dataclasses import dataclass, field
from typing import Optional

from dataclasses_json import dataclass_json, config


@dataclass_json
@dataclass
class Point:
    x:float
    y:float
    def __iter__(self):  # 使对象可迭代，可直接转为元组
        yield self.x
        yield self.y

@dataclass
class RectangleArea:
    x: int
    y: int
    w: int
    h: int
    @classmethod
    def from_dict(cls, data: dict):
        return cls(
            x=data['x'],
            y=data['y'],
            w=data['w'],
            h = data['h'])

@dataclass
class Threshold:
    binary: int
    gauss: int

@dataclass_json
@dataclass
class TargetInfo:
    # 标靶方形区域
    rectangle_area:RectangleArea
    threshold:Threshold
    radius_pix:float= 1
    # 标靶物理半径
    radius:float=0.0
    pix_length:float=0.0
    id:int =-1
    desc:str=""
    base:bool=False
    def __init__(self,id,desc,rectangle_area:RectangleArea,radius,threshold:Threshold,base:bool,**kwargs):
        self.id = id
        self.desc = desc
        self.rectangle_area=rectangle_area
        self.radius=radius
        self.threshold=threshold
        self.base=base

    @classmethod
    def from_dict(cls,data: dict):
        return cls(data['id'],data['rectangle_area'],data['radius'])


@dataclass_json
@dataclass
class CircleTarget:
    # 标靶方形区域
    info:TargetInfo

    # 初始标靶中心
    is_init=True
    # 标靶中心
    center_point: Optional[Point]= field(default=None, metadata=config(exclude=lambda x: x is None))
    center_init : Optional[Point]= field(default=None, metadata=config(exclude=lambda x: x is None))
    # 标靶位移(像素)
    displacement_pix: Optional[Point]= field(default=None, metadata=config(exclude=lambda x: x is None))
    displacement_phy: Optional[Point]= field(default=None, metadata=config(exclude=lambda x: x is None))

    def __init__(self,info:TargetInfo,center_point,center_init,displacement_pix,displacement_phy):
        self.info=info
        self.center_point=center_point
        self.center_init=center_init
        self. displacement_pix=displacement_pix
        self.displacement_phy=displacement_phy


    @classmethod
    def init_by_info(cls,t:TargetInfo):
        return CircleTarget(t,None,None,None,None)
    def circle_displacement(self):
        previous = self.center_init
        if previous != ():
            self.displacement_pix = Point(self.center_point.x - previous.x, self.center_point.y - previous.y)
            if self.info.radius != 0:
                # 单位像素距离
                self.info.pix_length = self.info.radius / self.info.radius_pix
                offset_x = round(float(self.displacement_pix.x * self.info.pix_length), 5)
                offset_y = round(float(self.displacement_pix.y * self.info.pix_length), 5)
                self.displacement_phy = Point(offset_x, offset_y)
        return self