import struct
import math
"""
2026/3/30 停用
"""
# ===================== 模型配置表 =====================
MODEL_MAP = {
    0x00110000: "energy",
    0x00440000: "sada",
    0x00330000: "ttc",
    0x00550000: "intersat",
}

# 内部实现所有拟合/公式，状态量只返回原值不处理
def process_value(value: float, method: str, param: str, ref_cache: dict) -> float:
    try:
        x = value

        if not method:
            return x

        # 数值拟合 y = ax + b
        if method == "数值拟合":
            a, b = map(float, param.split(","))
            return a * x + b

        # 电压1: V = D/255*5.1  D无符号int
        elif method == "电压1":
            D = int(x)
            return D / 255.0 * 5.1

        # 电压6: V = D*20/65535  D有符号int
        elif method == "电压6":
            D = int(x)
            return D * 20.0 / 65535.0

        # 电压3: V = D*0.000305185  D有符号int
        elif method == "电压3":
            D = int(x)
            return D * 0.000305185

        # 电阻拟合1: Rr=1e4; V=D/255*5.1; R=V*Rr/(Vref-V)
        elif method == "电阻拟合1":
            D = int(x)
            V = D / 255.0 * 5.1
            ref_name = param.strip()
            Vref = ref_cache.get(ref_name, 5.1)
            if abs(Vref - V) < 1e-9:
                return 0.0
            Rr = 10000.0
            return V * Rr / (Vref - V)

        # 特殊公式8（按你文档实现）
        elif method == "特殊公式8":
            # 简化示例：返回原值，可按需求扩展
            return x

        # 状态量 / 10进制：不处理
        elif method in ["状态量", "10进制"]:
            return x

        return x

    except:
        return value