#include "spc_core.h"

// ==================== SPC 系数结构实现 ====================
SpcCoefficient::SpcCoefficient(int id, int num, double a, double a2, double a3, double b3,
                               double b4, double b5, double b6, double d1, double d2,
                               double d3, double d4, double c4, double c4_1, double l_d1, double l_d1_1)
    : ID(id), NUM(num), A(a), A2(a2), A3(a3), B3(b3), B4(b4), B5(b5), B6(b6),
      D1(d1), D2(d2), D3(d3), D4(d4), C4(c4), C4_1(c4_1), L_D1(l_d1), L_D1_1(l_d1_1) {}

// ==================== SPC 系数表类实现 ====================
std::map<int, SpcCoefficient> SpcCoefficients::coefficientDict;

void SpcCoefficients::Initialize()
{
    static bool initialized = false;
    if (initialized)
        return;

    std::vector<SpcCoefficient> coefficients = {
        SpcCoefficient(1, 2, 2.121, 1.88, 2.659, 0, 3.267, 0, 2.606, 0, 3.686, 0, 3.267, 0.7979, 1.2533, 1.128, 0.8865),
        SpcCoefficient(2, 3, 1.732, 1.023, 1.954, 0, 2.568, 0, 2.676, 0, 4.358, 0, 2.574, 0.8862, 1.1284, 1.693, 0.5907),
        SpcCoefficient(3, 4, 1.5, 0.729, 1.628, 0, 2.266, 0, 2.088, 0, 4.698, 0, 2.282, 0.9213, 1.0854, 2.059, 0.4857),
        SpcCoefficient(4, 5, 1.342, 0.577, 1.427, 0, 2.089, 0, 1.964, 0, 4.918, 0, 2.114, 0.94, 1.0638, 2.326, 0.4299),
        SpcCoefficient(5, 6, 1.225, 0.483, 1.287, 0.03, 1.97, 0.029, 1.874, 0, 5.078, 0, 2.004, 0.9515, 1.051, 2.534, 0.3946),
        SpcCoefficient(6, 7, 1.134, 0.419, 1.182, 0.118, 1.882, 0.113, 1.806, 0.204, 5.204, 0.076, 1.924, 0.9594, 1.0423, 2.704, 0.3698),
        SpcCoefficient(7, 8, 1.061, 0.373, 1.099, 0.185, 1.815, 0.179, 1.751, 0.338, 5.306, 0.136, 1.864, 0.965, 1.0363, 2.847, 0.3512),
        SpcCoefficient(8, 9, 1, 0.337, 1.032, 0.239, 1.761, 0.232, 1.707, 0.547, 5.393, 0.184, 1.816, 0.9693, 1.0317, 2.97, 0.3367),
        SpcCoefficient(9, 10, 0.949, 0.308, 0.975, 0.284, 1.716, 2.276, 1.669, 0.687, 5.469, 0.223, 1.777, 0.9727, 1.0281, 3.078, 0.3249),
        SpcCoefficient(10, 11, 0.905, 0.285, 0.927, 0.321, 1.679, 0.313, 1.637, 0.811, 5.535, 0.256, 1.744, 0.9754, 1.0252, 3.173, 0.3152),
        SpcCoefficient(11, 12, 0.866, 0.266, 0.886, 0.354, 1.646, 0.346, 1.61, 0.922, 5.594, 0.283, 1.717, 0.9776, 1.0229, 3.258, 0.3069),
        SpcCoefficient(12, 13, 0.832, 0.249, 0.85, 0.382, 1.618, 0.374, 1.585, 1.025, 5.647, 0.307, 1.693, 0.9794, 1.021, 3.336, 0.2998),
        SpcCoefficient(13, 14, 0.802, 0.235, 0.817, 0.406, 1.594, 0.399, 1.563, 1.118, 5.696, 0.328, 1.672, 0.981, 1.0194, 3.407, 0.2935),
        SpcCoefficient(14, 15, 0.775, 0.223, 0.789, 0.428, 1.572, 0.421, 1.544, 1.203, 5.741, 0.347, 1.653, 0.9823, 1.018, 3.472, 0.288),
        SpcCoefficient(15, 16, 0.75, 0.212, 0.763, 0.448, 1.552, 0.44, 1.526, 1.282, 5.782, 0.363, 1.637, 0.9835, 1.0168, 3.532, 0.2831),
        SpcCoefficient(16, 17, 0.728, 0.203, 0.739, 0.466, 1.534, 0.458, 1.511, 1.356, 5.82, 0.378, 1.622, 0.9845, 1.0157, 3.588, 0.2787),
        SpcCoefficient(17, 18, 0.707, 0.194, 0.718, 0.482, 1.518, 0.475, 1.496, 1.424, 5.856, 0.391, 1.608, 0.9854, 1.0148, 3.64, 0.2747),
        SpcCoefficient(18, 19, 0.688, 0.187, 0.698, 0.497, 1.503, 0.49, 1.483, 1.487, 5.891, 0.403, 1.597, 0.9862, 1.014, 3.689, 0.2711),
        SpcCoefficient(19, 20, 0.671, 0.18, 0.68, 0.51, 1.49, 0.504, 1.47, 1.549, 5.921, 0.415, 1.585, 0.9869, 1.0133, 3.735, 0.2677),
        SpcCoefficient(20, 21, 0.655, 0.173, 0.663, 0.523, 1.477, 0.516, 1.459, 1.605, 5.951, 0.425, 1.575, 0.9876, 1.0126, 3.778, 0.2647),
        SpcCoefficient(21, 22, 0.64, 0.167, 0.647, 0.534, 1.466, 0.528, 1.448, 1.659, 5.979, 0.434, 1.566, 0.9882, 1.0119, 3.819, 0.2618),
        SpcCoefficient(22, 23, 0.626, 0.162, 0.633, 0.545, 1.455, 0.539, 1.438, 1.71, 6.006, 0.443, 1.557, 0.9887, 1.0114, 3.858, 0.2592),
        SpcCoefficient(23, 24, 0.612, 0.157, 0.619, 0.555, 1.445, 0.549, 1.429, 1.759, 6.031, 0.451, 1.548, 0.9892, 1.0109, 3.895, 0.2567),
        SpcCoefficient(24, 25, 0.6, 0.153, 0.606, 0.565, 1.435, 0.559, 1.42, 1.806, 6.056, 0.459, 1.541, 0.9896, 1.0105, 3.931, 0.2544)};

    for (const auto &coeff : coefficients)
    {
        coefficientDict[coeff.NUM] = coeff;
    }

    initialized = true;
}

const SpcCoefficient &SpcCoefficients::GetBySubgroupSize(int subgroupSize)
{
    Initialize();

    auto it = coefficientDict.find(subgroupSize);
    if (it != coefficientDict.end())
    {
        return it->second;
    }

    throw std::out_of_range("子组大小 " + std::to_string(subgroupSize) + " 不在有效范围 [2-25] 内");
}

double SpcCoefficients::GetA2(int subgroupSize) { return GetBySubgroupSize(subgroupSize).A2; }
double SpcCoefficients::GetA3(int subgroupSize) { return GetBySubgroupSize(subgroupSize).A3; }
double SpcCoefficients::GetD3(int subgroupSize) { return GetBySubgroupSize(subgroupSize).D3; }
double SpcCoefficients::GetD4(int subgroupSize) { return GetBySubgroupSize(subgroupSize).D4; }
double SpcCoefficients::GetB3(int subgroupSize) { return GetBySubgroupSize(subgroupSize).B3; }
double SpcCoefficients::GetB4(int subgroupSize) { return GetBySubgroupSize(subgroupSize).B4; }
double SpcCoefficients::GetC4(int subgroupSize) { return GetBySubgroupSize(subgroupSize).C4; }
double SpcCoefficients::GetL_D1(int subgroupSize) { return GetBySubgroupSize(subgroupSize).L_D1; }

// ==================== 工具函数实现 ====================
double SpcUtils::Round(double value, int decimals)
{
    double factor = std::pow(10.0, decimals);
    return std::round(value * factor) / factor;
}

double SpcUtils::Mean(const std::vector<double> &values)
{
    if (values.empty())
        return 0.0;

    double sum = 0.0;
    for (double value : values)
    {
        sum += value;
    }
    return sum / values.size();
}

double SpcUtils::Max(const std::vector<double> &values)
{
    if (values.empty())
        return 0.0;

    double maxVal = values[0];
    for (double value : values)
    {
        if (value > maxVal)
            maxVal = value;
    }
    return maxVal;
}

double SpcUtils::Min(const std::vector<double> &values)
{
    if (values.empty())
        return 0.0;

    double minVal = values[0];
    for (double value : values)
    {
        if (value < minVal)
            minVal = value;
    }
    return minVal;
}

double SpcUtils::Range(const std::vector<double> &values)
{
    if (values.size() < 2)
        return 0.0;
    return Max(values) - Min(values);
}

double SpcUtils::StandardDeviation(const std::vector<double> &values)
{
    if (values.size() < 2)
        return 0.0;

    double mean = Mean(values);
    double sumSquares = 0.0;

    for (double value : values)
    {
        double diff = value - mean;
        sumSquares += diff * diff;
    }

    return std::sqrt(sumSquares / (values.size() - 1));
}

double SpcUtils::StandardDeviationPopulation(const std::vector<double> &values)
{
    if (values.size() < 2)
        return 0.0;

    double mean = Mean(values);
    double sumSquares = 0.0;

    for (double value : values)
    {
        double diff = value - mean;
        sumSquares += diff * diff;
    }

    return std::sqrt(sumSquares / values.size());
}

std::string SpcUtils::GetCurrentTimestamp()
{
    auto now = std::chrono::system_clock::now();
    auto time = std::chrono::system_clock::to_time_t(now);
    std::tm tm;
#ifdef _WIN32
    localtime_s(&tm, &time);
#else
    localtime_r(&time, &tm);
#endif

    std::ostringstream oss;
    oss << std::put_time(&tm, "%Y-%m-%d %H:%M:%S");
    return oss.str();
}

// ==================== SPC 数据类实现 ====================
SpcDataXR::SpcDataXR() : n(0), k(0), CL_X(0.0), UCL_X(0.0), LCL_X(0.0),
                         CL_R(0.0), UCL_R(0.0), LCL_R(0.0) {}

json SpcDataXR::ToJson() const
{
    json j;
    j["n"] = n;
    j["k"] = k;
    j["CL_X"] = CL_X;
    j["UCL_X"] = UCL_X;
    j["LCL_X"] = LCL_X;
    j["CL_R"] = CL_R;
    j["UCL_R"] = UCL_R;
    j["LCL_R"] = LCL_R;
    j["CL_Xk"] = CL_Xk;
    j["CL_Rk"] = CL_Rk;
    return j;
}

SpcDataXR SpcDataXR::FromJson(const json &j)
{
    SpcDataXR data;
    data.n = j.value("n", 0);
    data.k = j.value("k", 0);
    data.CL_X = j.value("CL_X", 0.0);
    data.UCL_X = j.value("UCL_X", 0.0);
    data.LCL_X = j.value("LCL_X", 0.0);
    data.CL_R = j.value("CL_R", 0.0);
    data.UCL_R = j.value("UCL_R", 0.0);
    data.LCL_R = j.value("LCL_R", 0.0);

    if (j.contains("CL_Xk"))
    {
        data.CL_Xk = j["CL_Xk"].get<std::vector<double>>();
    }

    if (j.contains("CL_Rk"))
    {
        data.CL_Rk = j["CL_Rk"].get<std::vector<double>>();
    }

    return data;
}

SpcDataXS::SpcDataXS() : n(0), k(0), CL_X(0.0), UCL_X(0.0), LCL_X(0.0),
                         CL_S(0.0), UCL_S(0.0), LCL_S(0.0) {}

json SpcDataXS::ToJson() const
{
    json j;
    j["n"] = n;
    j["k"] = k;
    j["CL_X"] = CL_X;
    j["UCL_X"] = UCL_X;
    j["LCL_X"] = LCL_X;
    j["CL_S"] = CL_S;
    j["UCL_S"] = UCL_S;
    j["LCL_S"] = LCL_S;
    j["CL_Xk"] = CL_Xk;
    j["CL_Sk"] = CL_Sk;
    return j;
}

SpcDataXS SpcDataXS::FromJson(const json &j)
{
    SpcDataXS data;
    data.n = j.value("n", 0);
    data.k = j.value("k", 0);
    data.CL_X = j.value("CL_X", 0.0);
    data.UCL_X = j.value("UCL_X", 0.0);
    data.LCL_X = j.value("LCL_X", 0.0);
    data.CL_S = j.value("CL_S", 0.0);
    data.UCL_S = j.value("UCL_S", 0.0);
    data.LCL_S = j.value("LCL_S", 0.0);

    if (j.contains("CL_Xk"))
    {
        data.CL_Xk = j["CL_Xk"].get<std::vector<double>>();
    }

    if (j.contains("CL_Sk"))
    {
        data.CL_Sk = j["CL_Sk"].get<std::vector<double>>();
    }

    return data;
}

SpcDataCpk::SpcDataCpk() : n(0), k(0), SL(0.0), USL(0.0), LSL(0.0), Singma(0.0), SingmaS(0.0),
                           Ca(0.0), Cp(0.0), CPU(0.0), CPL(0.0), CR(0.0), Cpk(0.0), Pp(0.0),
                           PPU(0.0), PPL(0.0), PR(0.0), Ppk(0.0), ProcessSpread(0.0),
                           GroupWidth(0.0), GroupCount(0), ValueMax(0.0), ValueMin(0.0) {}

json SpcDataCpk::ToJson() const
{
    json j;
    j["n"] = n;
    j["k"] = k;
    j["SL"] = SL;
    j["USL"] = USL;
    j["LSL"] = LSL;
    j["Singma"] = Singma;
    j["SingmaS"] = SingmaS;
    j["Ca"] = Ca;
    j["Cp"] = Cp;
    j["CPU"] = CPU;
    j["CPL"] = CPL;
    j["CR"] = CR;
    j["Cpk"] = Cpk;
    j["Pp"] = Pp;
    j["PPU"] = PPU;
    j["PPL"] = PPL;
    j["PR"] = PR;
    j["Ppk"] = Ppk;
    j["ProcessSpread"] = ProcessSpread;
    j["GroupWidth"] = GroupWidth;
    j["GroupCount"] = GroupCount;
    j["ValueMax"] = ValueMax;
    j["ValueMin"] = ValueMin;
    j["Xk"] = Xk;
    j["XkUp"] = XkUp;
    j["XkDown"] = XkDown;
    j["Yk"] = Yk;
    j["YkCount"] = YkCount;
    j["NormalDistributionX"] = NormalDistributionX;
    j["NormalDistributionY"] = NormalDistributionY;
    return j;
}

SpcDataCpk SpcDataCpk::FromJson(const json &j)
{
    SpcDataCpk data;
    data.n = j.value("n", 0);
    data.k = j.value("k", 0);
    data.SL = j.value("SL", 0.0);
    data.USL = j.value("USL", 0.0);
    data.LSL = j.value("LSL", 0.0);
    data.Singma = j.value("Singma", 0.0);
    data.SingmaS = j.value("SingmaS", 0.0);
    data.Ca = j.value("Ca", 0.0);
    data.Cp = j.value("Cp", 0.0);
    data.CPU = j.value("CPU", 0.0);
    data.CPL = j.value("CPL", 0.0);
    data.CR = j.value("CR", 0.0);
    data.Cpk = j.value("Cpk", 0.0);
    data.Pp = j.value("Pp", 0.0);
    data.PPU = j.value("PPU", 0.0);
    data.PPL = j.value("PPL", 0.0);
    data.PR = j.value("PR", 0.0);
    data.Ppk = j.value("Ppk", 0.0);
    data.ProcessSpread = j.value("ProcessSpread", 0.0);
    data.GroupWidth = j.value("GroupWidth", 0.0);
    data.GroupCount = j.value("GroupCount", 0);
    data.ValueMax = j.value("ValueMax", 0.0);
    data.ValueMin = j.value("ValueMin", 0.0);

    if (j.contains("Xk"))
    {
        data.Xk = j["Xk"].get<std::vector<double>>();
    }

    if (j.contains("XkUp"))
    {
        data.XkUp = j["XkUp"].get<std::vector<double>>();
    }

    if (j.contains("XkDown"))
    {
        data.XkDown = j["XkDown"].get<std::vector<double>>();
    }

    if (j.contains("Yk"))
    {
        data.Yk = j["Yk"].get<std::vector<double>>();
    }

    if (j.contains("YkCount"))
    {
        data.YkCount = j["YkCount"].get<std::vector<double>>();
    }

    if (j.contains("NormalDistributionX"))
    {
        data.NormalDistributionX = j["NormalDistributionX"].get<std::vector<double>>();
    }

    if (j.contains("NormalDistributionY"))
    {
        data.NormalDistributionY = j["NormalDistributionY"].get<std::vector<double>>();
    }

    return data;
}

// ==================== 统一的 SPC 计算结果 JSON 结构实现 ====================
SpcResultJson::SpcResultJson() : Timestamp(SpcUtils::GetCurrentTimestamp()), Version("1.0") {}

json SpcResultJson::ToJson() const
{
    json j;
    j["XR"] = XR.ToJson();
    j["XS"] = XS.ToJson();
    j["Cpk"] = Cpk.ToJson();
    j["Timestamp"] = Timestamp;
    j["Version"] = Version;
    return j;
}

SpcResultJson SpcResultJson::FromJson(const json &j)
{
    SpcResultJson result;

    if (j.contains("XR"))
    {
        result.XR = SpcDataXR::FromJson(j["XR"]);
    }

    if (j.contains("XS"))
    {
        result.XS = SpcDataXS::FromJson(j["XS"]);
    }

    if (j.contains("Cpk"))
    {
        result.Cpk = SpcDataCpk::FromJson(j["Cpk"]);
    }

    result.Timestamp = j.value("Timestamp", SpcUtils::GetCurrentTimestamp());
    result.Version = j.value("Version", "1.0");

    return result;
}

// ==================== SPC 计算器实现 ====================
void SpcCalculator::CalculateHistogramData(const std::vector<double> &data, SpcDataCpk &result)
{
    result.Xk.resize(result.GroupCount);
    result.XkDown.resize(result.GroupCount);
    result.XkUp.resize(result.GroupCount);
    result.Yk.resize(result.GroupCount);
    result.YkCount.resize(result.GroupCount, 0.0);

    // 计算组边界
    for (int i = 0; i < result.GroupCount; i++)
    {
        if (i == 0)
        {
            result.XkDown[0] = result.ValueMin;
            result.XkUp[0] = result.ValueMin + result.GroupWidth;
        }
        else
        {
            result.XkDown[i] = result.XkDown[i - 1] + result.GroupWidth;
            result.XkUp[i] = result.XkUp[i - 1] + result.GroupWidth;
        }
        result.Xk[i] = (result.XkDown[i] + result.XkUp[i]) / 2.0;
    }

    // 最后一组的上边界调整，确保包含最大值
    result.XkUp[result.GroupCount - 1] = result.ValueMax;

    // 统计频数
    for (double value : data)
    {
        for (int i = 0; i < result.GroupCount; i++)
        {
            if (value >= result.XkDown[i] &&
                (i == result.GroupCount - 1 ? value <= result.XkUp[i] : value < result.XkUp[i]))
            {
                result.YkCount[i]++;
                break;
            }
        }
    }

    // 计算频率百分比
    for (int i = 0; i < result.GroupCount; i++)
    {
        result.Yk[i] = result.YkCount[i] / data.size() * 100.0;
    }
}

void SpcCalculator::CalculateNormalDistributionCurve(double mean, double sigma, SpcDataCpk &result)
{
    result.NormalDistributionX.resize(9);
    result.NormalDistributionY.resize(9);

    // X坐标：-3σ到+3σ
    for (int i = 0; i < 9; i++)
    {
        double sigmaMultiple = (i - 4) * 0.5;
        result.NormalDistributionX[i] = mean + sigmaMultiple * sigma;
    }

    // 计算最大频数用于缩放
    double maxCount = result.YkCount.empty() ? 1.0 : *std::max_element(result.YkCount.begin(), result.YkCount.end());

    // Y坐标：正态分布概率密度（按最大频数缩放）
    for (int i = 0; i < 9; i++)
    {
        double x = result.NormalDistributionX[i];
        double exponent = -0.5 * std::pow((x - mean) / sigma, 2);
        result.NormalDistributionY[i] = maxCount * std::exp(exponent);
    }
}

SpcDataXR SpcCalculator::CalculateXR(const std::vector<double> &data, int subgroupSize)
{
    SpcDataXR result;

    if (data.empty() || subgroupSize < MIN_SUBGROUP_SIZE)
    {
        return result;
    }

    int k = data.size() / subgroupSize;
    if (k == 0)
        return result;

    result.n = subgroupSize;
    result.k = k;

    // 获取 SPC 系数
    const SpcCoefficient &coeff = SpcCoefficients::GetBySubgroupSize(subgroupSize);

    // 计算各子组平均值和极差
    result.CL_Xk.resize(k);
    result.CL_Rk.resize(k);

    for (int i = 0; i < k; i++)
    {
        std::vector<double> subgroup(subgroupSize);
        std::copy(data.begin() + i * subgroupSize,
                  data.begin() + (i + 1) * subgroupSize,
                  subgroup.begin());

        result.CL_Xk[i] = SpcUtils::Mean(subgroup);
        result.CL_Rk[i] = SpcUtils::Range(subgroup);
    }

    // 计算中心线
    result.CL_X = SpcUtils::Mean(result.CL_Xk);
    result.CL_R = SpcUtils::Mean(result.CL_Rk);

    // 计算控制限
    result.UCL_X = result.CL_X + coeff.A2 * result.CL_R;
    result.LCL_X = result.CL_X - coeff.A2 * result.CL_R;
    result.UCL_R = coeff.D4 * result.CL_R;
    result.LCL_R = coeff.D3 * result.CL_R;

    return result;
}

SpcDataXS SpcCalculator::CalculateXS(const std::vector<double> &data, int subgroupSize)
{
    SpcDataXS result;

    if (data.empty() || subgroupSize < MIN_SUBGROUP_SIZE)
    {
        return result;
    }

    int k = data.size() / subgroupSize;
    if (k == 0)
        return result;

    result.n = subgroupSize;
    result.k = k;

    // 获取 SPC 系数
    const SpcCoefficient &coeff = SpcCoefficients::GetBySubgroupSize(subgroupSize);

    // 计算各子组平均值和标准差
    result.CL_Xk.resize(k);
    result.CL_Sk.resize(k);

    for (int i = 0; i < k; i++)
    {
        std::vector<double> subgroup(subgroupSize);
        std::copy(data.begin() + i * subgroupSize,
                  data.begin() + (i + 1) * subgroupSize,
                  subgroup.begin());

        result.CL_Xk[i] = SpcUtils::Mean(subgroup);
        result.CL_Sk[i] = SpcUtils::StandardDeviation(subgroup); // 样本标准差
    }

    // 计算中心线
    result.CL_X = SpcUtils::Mean(result.CL_Xk);
    result.CL_S = SpcUtils::Mean(result.CL_Sk);

    // 使用极差计算控制限（与原始代码一致）
    double rBar = 0.0;
    for (int i = 0; i < k; i++)
    {
        std::vector<double> subgroup(subgroupSize);
        std::copy(data.begin() + i * subgroupSize,
                  data.begin() + (i + 1) * subgroupSize,
                  subgroup.begin());
        rBar += SpcUtils::Range(subgroup);
    }
    rBar /= k;

    // 计算控制限
    result.UCL_X = result.CL_X + coeff.A3 * rBar;
    result.LCL_X = result.CL_X - coeff.A3 * rBar;
    result.UCL_S = coeff.B4 * result.CL_S;
    result.LCL_S = coeff.B3 * result.CL_S;

    return result;
}

SpcDataCpk SpcCalculator::CalculateCpk(const std::vector<double> &data, int subgroupSize, double usl, double lsl)
{
    SpcDataCpk result;

    if (data.empty() || subgroupSize < MIN_SUBGROUP_SIZE)
    {
        return result;
    }

    int k = data.size() / subgroupSize;
    if (k == 0)
        return result;

    result.n = subgroupSize;
    result.k = k;
    result.USL = usl;
    result.LSL = lsl;

    // 如果没给出规格限，使用3σ限
    if (std::abs(usl - lsl) < 0.000001)
    {
        double overallMean1 = SpcUtils::Mean(data);
        double overallStd = SpcUtils::StandardDeviationPopulation(data);
        usl = overallMean1 + 3 * overallStd;
        lsl = overallMean1 - 3 * overallStd;
        result.USL = usl;
        result.LSL = lsl;
    }

    // 计算总体平均值
    double overallMean = SpcUtils::Mean(data);

    // 获取 SPC 系数
    const SpcCoefficient &coeff = SpcCoefficients::GetBySubgroupSize(subgroupSize);

    // 计算组内标准差估计值（使用R-bar/d2）
    double rBar = 0.0;
    for (int i = 0; i < k; i++)
    {
        std::vector<double> subgroup(subgroupSize);
        std::copy(data.begin() + i * subgroupSize,
                  data.begin() + (i + 1) * subgroupSize,
                  subgroup.begin());
        rBar += SpcUtils::Range(subgroup);
    }
    rBar /= k;

    result.Singma = rBar / coeff.L_D1; // 组内标准差

    // 计算标准差平均值
    double sBar = 0.0;
    for (int i = 0; i < k; i++)
    {
        std::vector<double> subgroup(subgroupSize);
        std::copy(data.begin() + i * subgroupSize,
                  data.begin() + (i + 1) * subgroupSize,
                  subgroup.begin());
        sBar += SpcUtils::StandardDeviation(subgroup);
    }
    sBar /= k;
    result.SingmaS = sBar;

    // 计算能力指数
    double tolerance = usl - lsl;

    if (tolerance > 0)
    {
        result.Cp = tolerance / (6 * result.Singma);
        result.CPU = (usl - overallMean) / (3 * result.Singma);
        result.CPL = (overallMean - lsl) / (3 * result.Singma);
        result.Cpk = std::min(result.CPU, result.CPL);

        result.Pp = tolerance / (6 * result.SingmaS);
        result.PPU = (usl - overallMean) / (3 * result.SingmaS);
        result.PPL = (overallMean - lsl) / (3 * result.SingmaS);
        result.Ppk = std::min(result.PPU, result.PPL);

        // 计算 Ca（过程准确度）
        double center = (usl + lsl) / 2.0;
        result.Ca = std::abs(overallMean - center) / (tolerance / 2.0);

        // 计算 CR 和 PR
        result.CR = 6 * result.Singma / tolerance;
        result.PR = 6 * result.SingmaS / tolerance;

        result.SL = center;
    }

    // 计算直方图数据
    result.ValueMax = SpcUtils::Max(data);
    result.ValueMin = SpcUtils::Min(data);
    result.ProcessSpread = result.ValueMax - result.ValueMin;

    // 分组数（Sturges公式）
    result.GroupCount = 1 + static_cast<int>(3.32 * std::log10(data.size()));
    result.GroupWidth = result.ProcessSpread / result.GroupCount;

    // 计算分组数据
    CalculateHistogramData(data, result);

    // 计算正态分布曲线
    CalculateNormalDistributionCurve(overallMean, result.SingmaS, result);

    return result;
}
json SpcCalculator::Spc(const json &param)
{
    try
    {
        SpcTestData req_param = SpcTestData::FromJson(param);
        // 使用测试数据
        const std::vector<double> &testData = req_param.x; // 改为小写 x
        int subgroupSize = req_param.n;
        double usl = req_param.usl;
        double lsl = req_param.lsl;

        // 计算并获取整合的 JSON
        SpcDataXR xr = CalculateXR(testData, subgroupSize);
        SpcDataXS xs = CalculateXS(testData, subgroupSize);
        SpcDataCpk cpk = CalculateCpk(testData, subgroupSize, usl, lsl);

        // 四舍五入所有数值
        RoundSpcData(xr, xs, cpk);

        SpcResultJson result;
        result.XR = xr;
        result.XS = xs;
        result.Cpk = cpk;

        return result.ToJson();
    }
    catch (const std::exception &e)
    {
        json error;
        error["error"] = "SPC calculation failed: " + std::string(e.what());
        return error;
    }
}
json SpcCalculator::CalculateAllToJson(const std::vector<double> &data, int subgroupSize, double usl, double lsl)
{
    SpcDataXR xr = CalculateXR(data, subgroupSize);
    SpcDataXS xs = CalculateXS(data, subgroupSize);
    SpcDataCpk cpk = CalculateCpk(data, subgroupSize, usl, lsl);

    // 四舍五入所有数值
    RoundSpcData(xr, xs, cpk);

    SpcResultJson result;
    result.XR = xr;
    result.XS = xs;
    result.Cpk = cpk;

    return result.ToJson(); // 缩进2个空格
    // return result.ToJson().dump(2); // 缩进2个空格
}

void SpcCalculator::RoundSpcData(SpcDataXR &xr, SpcDataXS &xs, SpcDataCpk &cpk, int decimals)
{
    RoundSpcDataXR(xr, decimals);
    RoundSpcDataXS(xs, decimals);
    RoundSpcDataCpk(cpk, decimals);
}

void SpcCalculator::RoundSpcDataXR(SpcDataXR &data, int decimals)
{
    data.CL_X = SpcUtils::Round(data.CL_X, decimals);
    data.UCL_X = SpcUtils::Round(data.UCL_X, decimals);
    data.LCL_X = SpcUtils::Round(data.LCL_X, decimals);
    data.CL_R = SpcUtils::Round(data.CL_R, decimals);
    data.UCL_R = SpcUtils::Round(data.UCL_R, decimals);
    data.LCL_R = SpcUtils::Round(data.LCL_R, decimals);

    for (double &value : data.CL_Xk)
    {
        value = SpcUtils::Round(value, decimals);
    }

    for (double &value : data.CL_Rk)
    {
        value = SpcUtils::Round(value, decimals);
    }
}

void SpcCalculator::RoundSpcDataXS(SpcDataXS &data, int decimals)
{
    data.CL_X = SpcUtils::Round(data.CL_X, decimals);
    data.UCL_X = SpcUtils::Round(data.UCL_X, decimals);
    data.LCL_X = SpcUtils::Round(data.LCL_X, decimals);
    data.CL_S = SpcUtils::Round(data.CL_S, decimals);
    data.UCL_S = SpcUtils::Round(data.UCL_S, decimals);
    data.LCL_S = SpcUtils::Round(data.LCL_S, decimals);

    for (double &value : data.CL_Xk)
    {
        value = SpcUtils::Round(value, decimals);
    }

    for (double &value : data.CL_Sk)
    {
        value = SpcUtils::Round(value, decimals);
    }
}

void SpcCalculator::RoundSpcDataCpk(SpcDataCpk &data, int decimals)
{
    data.SL = SpcUtils::Round(data.SL, decimals);
    data.USL = SpcUtils::Round(data.USL, decimals);
    data.LSL = SpcUtils::Round(data.LSL, decimals);
    data.Singma = SpcUtils::Round(data.Singma, decimals);
    data.SingmaS = SpcUtils::Round(data.SingmaS, decimals);
    data.Ca = SpcUtils::Round(data.Ca, decimals);
    data.Cp = SpcUtils::Round(data.Cp, decimals);
    data.CPU = SpcUtils::Round(data.CPU, decimals);
    data.CPL = SpcUtils::Round(data.CPL, decimals);
    data.CR = SpcUtils::Round(data.CR, decimals);
    data.Cpk = SpcUtils::Round(data.Cpk, decimals);
    data.Pp = SpcUtils::Round(data.Pp, decimals);
    data.PPU = SpcUtils::Round(data.PPU, decimals);
    data.PPL = SpcUtils::Round(data.PPL, decimals);
    data.PR = SpcUtils::Round(data.PR, decimals);
    data.Ppk = SpcUtils::Round(data.Ppk, decimals);
    data.ProcessSpread = SpcUtils::Round(data.ProcessSpread, decimals);
    data.GroupWidth = SpcUtils::Round(data.GroupWidth, decimals);
    data.ValueMax = SpcUtils::Round(data.ValueMax, decimals);
    data.ValueMin = SpcUtils::Round(data.ValueMin, decimals);

    for (double &value : data.Xk)
        value = SpcUtils::Round(value, decimals);
    for (double &value : data.XkUp)
        value = SpcUtils::Round(value, decimals);
    for (double &value : data.XkDown)
        value = SpcUtils::Round(value, decimals);
    for (double &value : data.Yk)
        value = SpcUtils::Round(value, decimals);
    for (double &value : data.YkCount)
        value = SpcUtils::Round(value, decimals);
    for (double &value : data.NormalDistributionX)
        value = SpcUtils::Round(value, decimals);
    for (double &value : data.NormalDistributionY)
        value = SpcUtils::Round(value, decimals);
}

double SpcCalculator::CalculateCp(const std::vector<double> &data, int subgroupSize, double usl, double lsl)
{
    const SpcCoefficient &coeff = SpcCoefficients::GetBySubgroupSize(subgroupSize);

    int k = data.size() / subgroupSize;
    double rBar = 0.0;
    for (int i = 0; i < k; i++)
    {
        std::vector<double> subgroup(subgroupSize);
        std::copy(data.begin() + i * subgroupSize,
                  data.begin() + (i + 1) * subgroupSize,
                  subgroup.begin());
        rBar += SpcUtils::Range(subgroup);
    }
    rBar /= k;

    double sigma = rBar / coeff.L_D1;
    return (usl - lsl) / (6 * sigma);
}

double SpcCalculator::CalculatePp(const std::vector<double> &data, int subgroupSize, double usl, double lsl)
{
    double sigma = SpcUtils::StandardDeviationPopulation(data);
    return (usl - lsl) / (6 * sigma);
}

double SpcCalculator::CalculateCpu(const std::vector<double> &data, int subgroupSize, double usl)
{
    const SpcCoefficient &coeff = SpcCoefficients::GetBySubgroupSize(subgroupSize);

    double overallMean = SpcUtils::Mean(data);

    int k = data.size() / subgroupSize;
    double rBar = 0.0;
    for (int i = 0; i < k; i++)
    {
        std::vector<double> subgroup(subgroupSize);
        std::copy(data.begin() + i * subgroupSize,
                  data.begin() + (i + 1) * subgroupSize,
                  subgroup.begin());
        rBar += SpcUtils::Range(subgroup);
    }
    rBar /= k;

    double sigma = rBar / coeff.L_D1;
    return (usl - overallMean) / (3 * sigma);
}

double SpcCalculator::CalculateCpl(const std::vector<double> &data, int subgroupSize, double lsl)
{
    const SpcCoefficient &coeff = SpcCoefficients::GetBySubgroupSize(subgroupSize);

    double overallMean = SpcUtils::Mean(data);

    int k = data.size() / subgroupSize;
    double rBar = 0.0;
    for (int i = 0; i < k; i++)
    {
        std::vector<double> subgroup(subgroupSize);
        std::copy(data.begin() + i * subgroupSize,
                  data.begin() + (i + 1) * subgroupSize,
                  subgroup.begin());
        rBar += SpcUtils::Range(subgroup);
    }
    rBar /= k;

    double sigma = rBar / coeff.L_D1;
    return (overallMean - lsl) / (3 * sigma);
}

double SpcCalculator::CalculateXbarbar(const std::vector<double> &data, int subgroupSize)
{
    int k = data.size() / subgroupSize;
    std::vector<double> subgroupMeans(k);

    for (int i = 0; i < k; i++)
    {
        std::vector<double> subgroup(subgroupSize);
        std::copy(data.begin() + i * subgroupSize,
                  data.begin() + (i + 1) * subgroupSize,
                  subgroup.begin());
        subgroupMeans[i] = SpcUtils::Mean(subgroup);
    }

    return SpcUtils::Mean(subgroupMeans);
}

double SpcCalculator::CalculateRbar(const std::vector<double> &data, int subgroupSize)
{
    int k = data.size() / subgroupSize;
    std::vector<double> subgroupRanges(k);

    for (int i = 0; i < k; i++)
    {
        std::vector<double> subgroup(subgroupSize);
        std::copy(data.begin() + i * subgroupSize,
                  data.begin() + (i + 1) * subgroupSize,
                  subgroup.begin());
        subgroupRanges[i] = SpcUtils::Range(subgroup);
    }

    return SpcUtils::Mean(subgroupRanges);
}

double SpcCalculator::CalculateSbar(const std::vector<double> &data, int subgroupSize)
{
    int k = data.size() / subgroupSize;
    std::vector<double> subgroupStdDevs(k);

    for (int i = 0; i < k; i++)
    {
        std::vector<double> subgroup(subgroupSize);
        std::copy(data.begin() + i * subgroupSize,
                  data.begin() + (i + 1) * subgroupSize,
                  subgroup.begin());
        subgroupStdDevs[i] = SpcUtils::StandardDeviation(subgroup);
    }

    return SpcUtils::Mean(subgroupStdDevs);
}

// ==================== 直方图计算器实现 ====================
void HistogramCalculator::CalculateHistogram(const std::vector<double> &data, int numBins,
                                             std::vector<int> &frequencies, std::vector<double> &cumulativePercentages)
{
    frequencies.clear();
    cumulativePercentages.clear();

    if (data.empty() || numBins <= 0)
        return;

    frequencies.resize(numBins, 0);
    cumulativePercentages.resize(numBins, 0.0);

    double min = SpcUtils::Min(data);
    double max = SpcUtils::Max(data);
    double binWidth = (max - min) / numBins;

    // 调整边界，确保所有数据都能被包含
    min = std::floor(min / binWidth) * binWidth;
    max = std::ceil(max / binWidth) * binWidth;
    binWidth = (max - min) / numBins;

    // 统计频数
    for (double value : data)
    {
        int binIndex = static_cast<int>(std::floor((value - min) / binWidth));
        if (binIndex == numBins)
            binIndex--; // 处理最大值的情况
        frequencies[binIndex]++;
    }

    // 计算累计百分比
    int total = data.size();
    int cumulative = 0;
    for (int i = 0; i < numBins; i++)
    {
        cumulative += frequencies[i];
        cumulativePercentages[i] = static_cast<double>(cumulative) / total * 100.0;
    }
}

double HistogramCalculator::CalculateBinWidth(const std::vector<double> &data, int numBins)
{
    if (data.size() < 2 || numBins <= 0)
        return 0.0;

    double min = SpcUtils::Min(data);
    double max = SpcUtils::Max(data);
    double binWidth = (max - min) / numBins;

    // 舍入组距的内部函数
    auto RoundInterval = [](double interval) -> double
    {
        if (interval == 0.0)
        {
            throw std::out_of_range("组距不能为零");
        }

        // 处理大于1的情况
        double step = -1.0;
        double tempValue = interval;
        while (tempValue > 1.0)
        {
            step++;
            tempValue = tempValue / 10.0;
            if (step > 1000)
            {
                throw std::runtime_error("自动组距计算错误");
            }
        }

        // 处理小于1的情况
        tempValue = interval;
        if (tempValue < 1.0)
        {
            step = 0.0;
        }

        while (tempValue < 1.0)
        {
            step--;
            tempValue = tempValue * 10.0;
            if (step < -1000)
            {
                throw std::runtime_error("自动组距计算错误");
            }
        }

        double tempDiff = interval / std::pow(10.0, step);
        if (tempDiff < 3.0)
        {
            tempDiff = 2.0;
        }
        else if (tempDiff < 7.0)
        {
            tempDiff = 5.0;
        }
        else
        {
            tempDiff = 10.0;
        }

        return tempDiff * std::pow(10.0, step);
    };

    return RoundInterval(binWidth);
}

// ==================== API 响应和请求类实现 ====================
SpcTestData::SpcTestData() : n(0), k(0), usl(0.0), lsl(0.0) {}

json SpcTestData::ToJson() const
{
    json j;
    j["n"] = n;
    j["k"] = k;
    j["usl"] = usl;
    j["lsl"] = lsl;
    j["x"] = x;
    return j;
}

SpcTestData SpcTestData::FromJson(const json &j)
{
    SpcTestData data;
    data.n = j.value("n", 0);
    data.k = j.value("k", 0);
    data.usl = j.value("usl", 0.0);
    data.lsl = j.value("lsl", 0.0);

    if (j.contains("x"))
    {
        data.x = j["x"].get<std::vector<double>>();
    }

    return data;
}

// ApiResponseSpc::ApiResponseSpc() : success(false), code(0) {}

// json ApiResponseSpc::ToJson() const
// {
//     json j;
//     j["success"] = success;
//     j["code"] = code;
//     j["msg"] = msg;
//     j["req_code"] = req_code;
//     j["req_from"] = req_from;
//     j["req_cmd"] = req_cmd;

//     if (req_param)
//     {
//         j["req_param"] = req_param->ToJson();
//     }

//     return j;
// }

// ApiResponseSpc ApiResponseSpc::FromJson(const json &j)
// {
//     ApiResponseSpc response;
//     response.success = j.value("success", false);
//     response.code = j.value("code", 0);
//     response.msg = j.value("msg", "");
//     response.req_code = j.value("req_code", "");
//     response.req_from = j.value("req_from", "");
//     response.req_cmd = j.value("req_cmd", "");

//     if (j.contains("req_param"))
//     {
//         response.req_param = std::make_shared<SpcRequestParam>();
//         *response.req_param = SpcRequestParam::FromJson(j["req_param"]);
//     }

//     return response;
// }

// ==================== SPC 数据处理工具实现 ====================
// ApiResponseSpc SpcDataProcessor::DeserializeApiResponseSpc(const std::string &jsonStr)
// {
//     ApiResponseSpc response;
//     response.success = true;

//     if (jsonStr.empty())
//     {
//         response.success = false;
//         response.msg = "JSON 字符串不能为空";
//         return response;
//     }

//     try
//     {
//         json j = json::parse(jsonStr);
//         response = ApiResponseSpc::FromJson(j);

//         // 验证响应
//         ApiResponseSpc validationResult = ValidateResponse(response);
//         response.success = validationResult.success;
//         response.msg = validationResult.msg;

//         return response;
//     }
//     catch (const std::exception &ex)
//     {
//         response.success = false;
//         response.msg = "JSON 字符串符不合理: " + std::string(ex.what());
//         return response;
//     }
// }

// SpcTestData SpcDataProcessor::ExtractSpcTestData(const ApiResponseSpc &response)
// {
//     if (!response.success || !response.req_param)
//     {
//         return SpcTestData();
//     }

//     SpcTestData data;
//     data.n = response.req_param->n;
//     data.k = response.req_param->k;
//     data.usl = response.req_param->usl;
//     data.lsl = response.req_param->lsl;
//     data.x = response.req_param->x;

//     return data;
// }

// ApiResponseSpc SpcDataProcessor::ValidateResponse(const ApiResponseSpc &response)
// {
//     ApiResponseSpc result;
//     result.success = true;

//     if (!response.req_param)
//     {
//         result.success = false;
//         result.msg = "请求参数为空";
//         return result;
//     }

//     const auto &data = *response.req_param;

//     // 验证 SPC 数据完整性
//     if (data.n <= 0)
//     {
//         result.success = false;
//         result.msg = "n=" + std::to_string(data.n) + "子组大小必须大于0";
//         return result;
//     }

//     if (data.k <= 0)
//     {
//         result.success = false;
//         result.msg = "k=" + std::to_string(data.k) + "子组个数必须大于0";
//         return result;
//     }

//     if (data.x.empty())
//     {
//         result.success = false;
//         result.msg = "测量数据不能为空";
//         return result;
//     }

//     // 验证数据个数是否匹配
//     int expectedDataCount = data.n * data.k;
//     if (data.x.size() != expectedDataCount)
//     {
//         result.success = false;
//         result.msg = "数据个数不匹配：子组大小(n)=" + std::to_string(data.n) +
//                      ", 子组个数(k)=" + std::to_string(data.k) +
//                      ", 期望数据个数=" + std::to_string(expectedDataCount) +
//                      ", 实际数据个数=" + std::to_string(data.x.size());
//         return result;
//     }

//     if (data.usl <= data.lsl)
//     {
//         result.success = true;
//         result.msg = "警告: 规格上限应大于规格下限，SPC 数据完整";
//         return result;
//     }

//     result.success = true;
//     result.msg = "SPC 数据完整";
//     return result;
// }

// ==================== 示例数据实现 ====================
namespace Spc_Data_TestData
{
    const int n = 5;
    const int k = 30;
    const double USL = 1.7;
    const double LSL = 1.5;

    const std::vector<double> X = {
        1.55, 1.58, 1.61, 1.60, 1.60, // 1
        1.58, 1.63, 1.63, 1.62, 1.63, // 2
        1.62, 1.63, 1.62, 1.59, 1.58, // 3
        1.58, 1.60, 1.61, 1.62, 1.63, // 4
        1.58, 1.64, 1.63, 1.62, 1.62, // 5
        1.62, 1.62, 1.63, 1.61, 1.57, // 6
        1.64, 1.62, 1.61, 1.60, 1.58, // 7
        1.57, 1.59, 1.61, 1.62, 1.63, // 8
        1.58, 1.61, 1.60, 1.62, 1.63, // 9
        1.60, 1.61, 1.64, 1.64, 1.63, // 10
        1.58, 1.60, 1.62, 1.63, 1.65, // 11
        1.62, 1.58, 1.59, 1.57, 1.58, // 12
        1.57, 1.57, 1.58, 1.59, 1.64, // 13
        1.61, 1.64, 1.62, 1.60, 1.59, // 14
        1.65, 1.62, 1.62, 1.60, 1.58, // 15
        1.57, 1.59, 1.57, 1.59, 1.62, // 16
        1.56, 1.57, 1.57, 1.61, 1.62, // 17
        1.56, 1.58, 1.59, 1.60, 1.62, // 18
        1.58, 1.60, 1.60, 1.62, 1.63, // 19
        1.58, 1.59, 1.60, 1.63, 1.62, // 20
        1.58, 1.59, 1.62, 1.63, 1.64, // 21
        1.58, 1.59, 1.62, 1.63, 1.61, // 22
        1.58, 1.59, 1.60, 1.61, 1.63, // 23
        1.57, 1.59, 1.61, 1.61, 1.62, // 24
        1.58, 1.58, 1.60, 1.61, 1.63, // 25
        1.62, 1.58, 1.58, 1.58, 1.57, // 26
        1.63, 1.59, 1.57, 1.58, 1.57, // 27
        1.58, 1.62, 1.61, 1.63, 1.61, // 28
        1.58, 1.57, 1.59, 1.60, 1.62, // 29
        1.62, 1.60, 1.60, 1.57, 1.57  // 30
    };
}

// ==================== 示例函数实现 ====================
void RunJsonExample_5_30()
{
    std::cout << "=== SPC JSON 计算示例 (n=5, k=30) ===" << std::endl;

    // 使用测试数据
    const std::vector<double> &testData = Spc_Data_TestData::X;
    int subgroupSize = Spc_Data_TestData::n;
    double usl = Spc_Data_TestData::USL;
    double lsl = Spc_Data_TestData::LSL;

    // 计算并获取整合的 JSON
    std::string jsonResult = SpcCalculator::CalculateAllToJson(testData, subgroupSize, usl, lsl);
    std::cout << "整合的 SPC JSON 结果:" << std::endl;
    std::cout << jsonResult << std::endl;

    // 也可以单独计算
    SpcDataXR xr = SpcCalculator::CalculateXR(testData, subgroupSize);
    SpcDataXS xs = SpcCalculator::CalculateXS(testData, subgroupSize);
    SpcDataCpk cpk = SpcCalculator::CalculateCpk(testData, subgroupSize, usl, lsl);

    // 四舍五入
    SpcCalculator::RoundSpcData(xr, xs, cpk);

    // 创建结果对象
    SpcResultJson result;
    result.XR = xr;
    result.XS = xs;
    result.Cpk = cpk;

    std::string json = result.ToJson().dump(2);
    std::cout << "\n单独序列化的结果:" << std::endl;
    std::cout << json << std::endl;
}

void RunSpcExample()
{
    std::cout << "=== SPC 计算示例 ===" << std::endl;

    // 示例数据
    std::vector<double> testData = {
        1.55, 1.58, 1.61, 1.60, 1.60,
        1.58, 1.63, 1.63, 1.62, 1.63,
        1.62, 1.63, 1.62, 1.59, 1.58,
        1.58, 1.60, 1.61, 1.62, 1.63};

    int subgroupSize = 5;
    double usl = 1.70;
    double lsl = 1.50;

    std::cout << "数据点数: " << testData.size() << std::endl;
    std::cout << "子组大小: " << subgroupSize << std::endl;
    std::cout << "规格上限: " << usl << std::endl;
    std::cout << "规格下限: " << lsl << std::endl;
    std::cout << std::endl;

    // 1. 计算 X-R 控制图
    SpcDataXR xrResult = SpcCalculator::CalculateXR(testData, subgroupSize);
    std::cout << "X-R控制图结果:" << std::endl;
    std::cout << "X图中心线 (CL_X): " << xrResult.CL_X << std::endl;
    std::cout << "X图上控制限 (UCL_X): " << xrResult.UCL_X << std::endl;
    std::cout << "X图下控制限 (LCL_X): " << xrResult.LCL_X << std::endl;
    std::cout << "R图中心线 (CL_R): " << xrResult.CL_R << std::endl;
    std::cout << "R图上控制限 (UCL_R): " << xrResult.UCL_R << std::endl;
    std::cout << "R图下控制限 (LCL_R): " << xrResult.LCL_R << std::endl;
    std::cout << std::endl;

    // 2. 计算 X-S 控制图
    SpcDataXS xsResult = SpcCalculator::CalculateXS(testData, subgroupSize);
    std::cout << "X-S控制图结果:" << std::endl;
    std::cout << "X图中心线 (CL_X): " << xsResult.CL_X << std::endl;
    std::cout << "X图上控制限 (UCL_X): " << xsResult.UCL_X << std::endl;
    std::cout << "X图下控制限 (LCL_X): " << xsResult.LCL_X << std::endl;
    std::cout << "S图中心线 (CL_S): " << xsResult.CL_S << std::endl;
    std::cout << "S图上控制限 (UCL_S): " << xsResult.UCL_S << std::endl;
    std::cout << "S图下控制限 (LCL_S): " << xsResult.LCL_S << std::endl;
    std::cout << std::endl;

    // 3. 计算过程能力指数
    SpcDataCpk cpkResult = SpcCalculator::CalculateCpk(testData, subgroupSize, usl, lsl);
    std::cout << "过程能力指数结果:" << std::endl;
    std::cout << "Cp: " << cpkResult.Cp << std::endl;
    std::cout << "Cpk: " << cpkResult.Cpk << std::endl;
    std::cout << "Cpu: " << cpkResult.CPU << std::endl;
    std::cout << "Cpl: " << cpkResult.CPL << std::endl;
    std::cout << "Pp: " << cpkResult.Pp << std::endl;
    std::cout << "Ppk: " << cpkResult.Ppk << std::endl;
    std::cout << "Ca: " << cpkResult.Ca << std::endl;
    std::cout << std::endl;

    // 4. 计算其他统计指标
    std::cout << "其他统计指标:" << std::endl;
    std::cout << "总体平均值: " << SpcCalculator::CalculateXbarbar(testData, subgroupSize) << std::endl;
    std::cout << "R-bar: " << SpcCalculator::CalculateRbar(testData, subgroupSize) << std::endl;
    std::cout << "S-bar: " << SpcCalculator::CalculateSbar(testData, subgroupSize) << std::endl;
    std::cout << "Cp值: " << SpcCalculator::CalculateCp(testData, subgroupSize, usl, lsl) << std::endl;
    std::cout << "Pp值: " << SpcCalculator::CalculatePp(testData, subgroupSize, usl, lsl) << std::endl;
    std::cout << std::endl;

    // 5. 计算直方图数据
    std::vector<int> frequencies;
    std::vector<double> cumulativePercentages;
    HistogramCalculator::CalculateHistogram(testData, 6, frequencies, cumulativePercentages);

    std::cout << "直方图数据 (前3组):" << std::endl;
    for (int i = 0; i < std::min(3, static_cast<int>(frequencies.size())); i++)
    {
        std::cout << "组" << i + 1 << ": 频数=" << frequencies[i]
                  << ", 累计%=" << cumulativePercentages[i] << std::endl;
    }
    std::cout << std::endl;

    // 6. 获取 SPC 系数
    const SpcCoefficient &coeff = SpcCoefficients::GetBySubgroupSize(subgroupSize);
    std::cout << "SPC系数 (n=" << subgroupSize << "):" << std::endl;
    std::cout << "A2: " << coeff.A2 << std::endl;
    std::cout << "D4: " << coeff.D4 << std::endl;
    std::cout << "d2 (L_D1): " << coeff.L_D1 << std::endl;
}

// ==================== 主函数 ====================
int main_spc()
{
    try
    {
        // 运行示例
        RunJsonExample_5_30();
        std::cout << "\n\n";
        RunSpcExample();

        return 0;
    }
    catch (const std::exception &ex)
    {
        std::cerr << "错误: " << ex.what() << std::endl;
        return 1;
    }
}