// error.js - 示值误差测试相关功能

// 图表相关变量
let errorCtx = null;
let errorChartInstance = null;


function initializeErrorPage() {
    // 生成示值误差标签页内容
    generateErrorTabContent();

    // 加载示值误差数据
    loadErrorData();
}

// 生成示值误差标签页内容
function generateErrorTabContent() {
    console.log('generateErrorTabContent');

    const errorTab = document.createElement('div');
    errorTab.id = 'error';
    errorTab.className = 'tab-content';

    // 创建内容容器
    const contentContainer = document.createElement('div');
    contentContainer.className = 'content-container';

    // 创建输入部分
    const inputSection = document.createElement('div');
    inputSection.className = 'input-section';
    inputSection.style.width = '100%';

    // 创建误差容器
    const errorContainer = document.createElement('div');
    errorContainer.className = 'error-container';
    errorContainer.id = 'error-inputs';

    // 添加按钮
    const addInputBtn = document.createElement('div');
    addInputBtn.className = 'add-input-btn';
    addInputBtn.onclick = addErrorPoint;
    const addInputSpan = document.createElement('span');
    addInputSpan.textContent = '+ 添加测试点';
    addInputBtn.appendChild(addInputSpan);

    // 创建不确定度结果部分
    const uncertaintyResults = document.createElement('div');
    uncertaintyResults.className = 'uncertainty-results';
    uncertaintyResults.style.marginTop = '1rem';
    uncertaintyResults.style.padding = '1rem';
    uncertaintyResults.style.border = '1px solid #eee';
    uncertaintyResults.style.borderRadius = '4px';

    // 添加标题
    const uncertaintyTitle = document.createElement('h3');
    uncertaintyTitle.style.marginTop = '0';
    uncertaintyTitle.textContent = '示值误差校准结果不确定度';
    uncertaintyResults.appendChild(uncertaintyTitle);

    // 创建结果显示
    const results = document.createElement('div');
    results.className = 'results';

    // 添加结果项
    const resultItems = [
        { label: 'A类不确定度(uA):', id: 'uncertainty-a' },
        { label: 'B类不确定度(uB):', id: 'uncertainty-b' },
        { label: 'C类不确定度(uc):', id: 'uncertainty-c' },
        { label: '扩展不确定度(U):', id: 'uncertainty-u' }
    ];

    resultItems.forEach(item => {
        const resultItem = document.createElement('div');
        resultItem.className = 'result-item';
        resultItem.innerHTML = `${item.label} <span id="${item.id}">-</span>`;
        results.appendChild(resultItem);
    });

    uncertaintyResults.appendChild(results);

    // 创建图表容器
    const chartContainer = document.createElement('div');
    chartContainer.className = 'chart-container';
    const canvas = document.createElement('canvas');
    canvas.id = 'errorChart';
    chartContainer.appendChild(canvas);
    errorCtx = canvas.getContext('2d');

    // 组装输入部分
    inputSection.appendChild(errorContainer);
    inputSection.appendChild(addInputBtn);
    inputSection.appendChild(uncertaintyResults);
    inputSection.appendChild(chartContainer);

    // 组装整个内容
    contentContainer.appendChild(inputSection);
    errorTab.appendChild(contentContainer);
    if (document.getElementById('container')) {
        console.log('appendChild errorTab');
        document.getElementById('container').appendChild(errorTab);
    }

    // 添加初始示值误差测试点（因为已移除所有默认测试点）
    if (document.querySelectorAll('#error-inputs .error-point-container').length === 0) {
        addErrorPoint();
    }
}

// 示值误差测试点容器创建
function createErrorPointContainer(pointValue = '') {
    const container = document.createElement('div');
    container.className = 'error-point-container';
    container.style.marginBottom = '1rem';
    container.style.padding = '1rem';
    container.style.border = '1px solid #eee';
    container.style.borderRadius = '4px';

    // 测试点输入
    const pointRow = document.createElement('div');
    pointRow.style.display = 'flex';
    pointRow.style.alignItems = 'center';
    pointRow.style.marginBottom = '0.5rem';

    const pointLabel = document.createElement('label');
    pointLabel.textContent = '测试点：';
    pointLabel.style.marginRight = '0.5rem';
    pointLabel.style.fontWeight = 'bold';

    const pointInput = document.createElement('input');
    pointInput.type = 'number';
    pointInput.className = 'error-point-input';
    pointInput.placeholder = '测试点';
    pointInput.value = pointValue;
    pointInput.setAttribute('data-original', pointValue);
    pointInput.style.flex = '1';
    pointInput.style.marginRight = '0.5rem';
    pointInput.oninput = function () {
        updateErrorPoint(this);
        // 保存示值误差数据
        saveErrorData();
    };

    const deleteBtn = document.createElement('span');
    deleteBtn.className = 'delete-btn';
    deleteBtn.innerHTML = '×';
    deleteBtn.onclick = function () {
        container.parentNode.removeChild(container);
        calculateError();
        // 保存误差数据
        saveErrorData();
    };

    pointRow.appendChild(pointLabel);
    pointRow.appendChild(pointInput);
    pointRow.appendChild(deleteBtn);

    // 输入值部分
    const inputsContainer = document.createElement('div');
    inputsContainer.className = 'error-inputs';
    inputsContainer.style.display = 'flex';
    inputsContainer.style.flexWrap = 'wrap';
    inputsContainer.style.gap = '0.5rem';
    inputsContainer.style.marginBottom = '0.5rem';

    // 添加3个默认输入框
    for (let i = 0; i < 3; i++) {
        const input = document.createElement('input');
        input.type = 'number';
        input.className = 'error-input';
        input.placeholder = `输入值`;
        input.setAttribute('data-point', pointValue);
        input.style.flex = '1';
        input.style.minWidth = '100px';
        input.oninput = function () {
            calculateError();
            // 保存误差数据到localStorage
            saveErrorData();
        };
        inputsContainer.appendChild(input);
    }

    // 结果显示部分
    const resultsRow = document.createElement('div');
    resultsRow.style.display = 'flex';
    resultsRow.style.flexDirection = 'column';

    const avgContainer = document.createElement('div');
    avgContainer.style.flex = '1';
    const avgLabel = document.createElement('span');
    avgLabel.textContent = '平均值：';
    avgLabel.style.fontWeight = 'bold';
    const avgSpan = document.createElement('span');
    avgSpan.className = 'error-avg';
    avgSpan.setAttribute('data-point', pointValue);
    avgSpan.textContent = '-';
    avgContainer.appendChild(avgLabel);
    avgContainer.appendChild(avgSpan);

    const errorContainer = document.createElement('div');
    errorContainer.style.flex = '1';
    const errorLabel = document.createElement('span');
    errorLabel.textContent = '示值误差：';
    errorLabel.style.fontWeight = 'bold';
    const errorSpan = document.createElement('span');
    errorSpan.className = 'error-value';
    errorSpan.setAttribute('data-point', pointValue);
    errorSpan.textContent = '-';
    errorContainer.appendChild(errorLabel);
    errorContainer.appendChild(errorSpan);

    resultsRow.appendChild(avgContainer);
    resultsRow.appendChild(errorContainer);

    container.appendChild(pointRow);
    container.appendChild(inputsContainer);
    container.appendChild(resultsRow);

    return container;
}

// 示值误差测试点添加
function addErrorPoint() {
    const container = document.getElementById('error-inputs');
    const pointContainer = createErrorPointContainer();
    container.appendChild(pointContainer);
}

// 示值误差测试点更新
function updateErrorPoint(input) {
    const pointContainer = input.closest('.error-point-container');
    const originalValue = input.getAttribute('data-original');
    const newValue = input.value;

    // 如果测试点值发生变化，更新所有相关元素的data-point属性
    if (originalValue !== newValue) {
        input.setAttribute('data-original', newValue);
        pointContainer.querySelectorAll('.error-input').forEach(input => {
            input.setAttribute('data-point', newValue);
        });
        pointContainer.querySelector('.error-avg').setAttribute('data-point', newValue);
        pointContainer.querySelector('.error-value').setAttribute('data-point', newValue);
    }

    calculateError();
    saveErrorData();
}

// 清除示值误差数据
function clearErrorData() {
    // 清除示值误差数据
    const errorContainer = document.getElementById('error-inputs');
    while (errorContainer.firstChild) {
        errorContainer.removeChild(errorContainer.firstChild);
    }
    addErrorPoint();

    // 重置图表
    if (errorChartInstance) {
        errorChartInstance.destroy();
        errorChartInstance = null;
    }
}

// 示值误差数据计算
function calculateError() {
    const pointContainers = document.querySelectorAll('.error-point-container');
    const errorData = [];

    pointContainers.forEach(container => {
        const pointInput = container.querySelector('.error-point-input');
        const inputs = container.querySelectorAll('.error-input');
        const avgSpan = container.querySelector('.error-avg');
        const errorSpan = container.querySelector('.error-value');

        const pointValue = parseFloat(pointInput.value);
        const values = Array.from(inputs)
            .map(input => parseFloat(input.value))
            .filter(value => !isNaN(value));

        if (!isNaN(pointValue) && values.length > 0) {
            // 计算平均值
            const avg = values.reduce((sum, val) => sum + val, 0) / values.length;
            // 计算示值误差
            const error = avg - pointValue;

            // 更新显示
            avgSpan.textContent = avg.toFixed(6);
            errorSpan.textContent = error.toFixed(6);

            // 收集数据用于图表和不确定度计算
            errorData.push({
                point: pointValue,
                avg: avg,
                error: error
            });
        } else {
            avgSpan.textContent = '-';
            errorSpan.textContent = '-';
        }
    });

    // 计算不确定度
    calculateUncertainty(errorData);

    // 保存误差数据
    saveErrorData();

    // 更新图表
    updateErrorChart(errorData);


    return errorData;
}

// 示值误差不确定度计算
function calculateUncertainty(errorData) {
    if (errorData.length === 0) {
        // 清空不确定度显示
        document.getElementById('uncertainty-a').textContent = '-';
        document.getElementById('uncertainty-b').textContent = '-';
        document.getElementById('uncertainty-c').textContent = '-';
        document.getElementById('uncertainty-u').textContent = '-';
        return;
    }

    // 计算A类不确定度（重复测量的标准偏差）
    let sumSquaredDeviations = 0;
    let totalMeasurements = 0;

    document.querySelectorAll('.error-point-container').forEach(container => {
        const inputs = container.querySelectorAll('.error-input');
        const values = Array.from(inputs)
            .map(input => parseFloat(input.value))
            .filter(value => !isNaN(value));

        if (values.length > 0) {
            const avg = values.reduce((sum, val) => sum + val, 0) / values.length;
            values.forEach(value => {
                sumSquaredDeviations += Math.pow(value - avg, 2);
            });
            totalMeasurements += values.length;
        }
    });

    // 计算A类不确定度
    const uA = totalMeasurements > 1 ? Math.sqrt(sumSquaredDeviations / (totalMeasurements * (totalMeasurements - 1))) : 0;

    // 假设B类不确定度（仪器分辨率引起的不确定度）
    // 这里假设分辨率为0.001，则B类不确定度为0.001/√3
    const resolution = 0.001;
    const uB = resolution / Math.sqrt(3);

    // 合成不确定度
    const uC = Math.sqrt(Math.pow(uA, 2) + Math.pow(uB, 2));

    // 扩展不确定度（k=2，约95%置信水平）
    const U = 2 * uC;

    // 更新显示
    document.getElementById('uncertainty-a').textContent = uA.toExponential(3);
    document.getElementById('uncertainty-b').textContent = uB.toExponential(3);
    document.getElementById('uncertainty-c').textContent = uC.toExponential(3);
    document.getElementById('uncertainty-u').textContent = U.toExponential(3);

}

// 示值误差图表更新
function updateErrorChart(data) {
    if (data.length === 0) {
        if (errorChartInstance) {
            errorChartInstance.data.labels = [];
            errorChartInstance.data.datasets[0].data = [];
            errorChartInstance.update();
        }
        return;
    }

    // 按测试点值排序
    data.sort((a, b) => a.point - b.point);

    // 提取标签和误差值
    const labels = data.map(item => item.point);
    const errorValues = data.map(item => item.error);

    // 使用通用图表创建函数
    errorChartInstance = createOrUpdateChart(errorChartInstance, errorCtx, labels, errorValues, '示值误差');
}

// 示值误差数据保存
function saveErrorData() {
    // 收集输入数据
    const inputs = Array.from(document.querySelectorAll('.error-point-container')).map(container => {
        const pointInput = container.querySelector('.error-point-input');
        const inputs = container.querySelectorAll('.error-input');
        const avgSpan = container.querySelector('.error-avg');
        const errorSpan = container.querySelector('.error-value');

        return {
            point: pointInput.value,
            value: Array.from(inputs).map(input => input.value),
            avg: avgSpan.innerText,
            error: errorSpan.innerText
        };
    });
    // 收集结果数据
    const results = {
        uncertainty_a: document.getElementById('uncertainty-a').textContent,
        uncertainty_b: document.getElementById('uncertainty-b').textContent,
        uncertainty_c: document.getElementById('uncertainty-c').textContent,
        uncertainty_u: document.getElementById('uncertainty-u').textContent
    };

    const data = {
        inputs: inputs,
        results: results
    };
    const dataName = 'errorData';
    console.log(dataName, data);

    setLocalStorage(dataName, JSON.stringify(data));
}

// 示值误差数据加载
function loadErrorData() {
    const savedErrorData = getLocalStorage('errorData');
    if (savedErrorData) {
        try {
            const data = JSON.parse(savedErrorData);

            // 清除现有的测试点
            const errorContainer = document.getElementById('error-inputs');
            while (errorContainer.firstChild) {
                errorContainer.removeChild(errorContainer.firstChild);
            }

            // 添加保存的测试点
            if (data.inputs && data.inputs.length > 0) {
                data.inputs.forEach((item, index) => {
                    const point = typeof item === 'object' ? item.point : '';
                    const value = typeof item === 'object' ? item.value : '';

                    const pointContainer = createErrorPointContainer(item.point);
                    errorContainer.appendChild(pointContainer);

                    // 填充测试点
                    pointContainer.querySelector('.error-point-input').value = point;

                    // 填充输入值
                    const inputs = pointContainer.querySelectorAll('.error-input');
                    value.forEach((value, index) => {
                        if (index < inputs.length) {
                            inputs[index].value = value;
                        }
                    });
                });
            }

            // 计算结果
            calculateError();
        } catch (e) {
            console.error('加载示值误差数据失败:', e);
        }
    }
}