// common.js - 通用功能和初始化函数

// 页面加载完成后初始化
document.addEventListener('DOMContentLoaded', function () {
    // 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();
    }


    // 调用各个模块的占位符更新函数
    if (typeof updateRepeatabilityInputPlaceholders === 'function') {
        updateRepeatabilityInputPlaceholders();
    }

    if (typeof updateStabilityInputPlaceholders === 'function') {
        updateStabilityInputPlaceholders();
    }
    // 调用各个模块的删除按钮更新函数
    if (typeof updateRepeatabilityDeleteButtons === 'function') {
        updateRepeatabilityDeleteButtons();
    }

    if (typeof updateStabilityDeleteButtons === 'function') {
        updateStabilityDeleteButtons();
    }

    // 调用updateStabilityInputs以保持向后兼容性
    if (typeof updateStabilityInputs === 'function') {
        updateStabilityInputs();
    }
    // 初始化示值误差测试点的删除按钮
    updateErrorPoints();

    loadTimerSettings();
    // 初始化页面数据
    initializePage();
});

// 标签页切换功能
document.querySelectorAll('.tab').forEach(tab => {
    tab.addEventListener('click', function() {
        // 保存当前自定义参数
        saveCustomParamsData();

        // 切换标签页
        const tabId = this.getAttribute('data-tab');
        document.querySelectorAll('.tab').forEach(t => t.classList.remove('active'));
        document.querySelectorAll('.tab-content').forEach(content => content.classList.remove('active'));
        this.classList.add('active');
        document.getElementById(tabId).classList.add('active');
    });
});

// 通用函数
function createInputRow(index, type, onInputFunction, onDeleteFunction) {
    const row = document.createElement('div');
    row.className = 'input-row';

    const timeSpan = document.createElement('span');
    timeSpan.id = `${type}-time-text-${index}`;
    timeSpan.textContent = `${index}: `;

    const input = document.createElement('input');
    input.type = 'number';
    input.placeholder = '输入值';
    input.id = `${type}-value-${index}`;
    input.oninput = function() { onInputFunction(index); };

    const deleteBtn = document.createElement('span');
    deleteBtn.className = 'delete-btn';
    deleteBtn.innerHTML = '×';
    deleteBtn.onclick = function() { onDeleteFunction(this); };

    row.appendChild(timeSpan);
    row.appendChild(input);
    row.appendChild(deleteBtn);

    return row;
}

function updateInputRows(selector, minRows) {
    const rows = document.querySelectorAll(selector);
    rows.forEach((row, index) => {
        const deleteBtn = row.querySelector('.delete-btn');
        if (index < minRows - 1) {
            deleteBtn.style.visibility = 'hidden';
        } else {
            deleteBtn.style.visibility = 'visible';
        }
    });
}

function recordTimeAndCalculate(type, index, timesArray, calculateFunction) {
    const now = new Date();
    const timeString = now.toLocaleTimeString('zh-CN', { hour: '2-digit', minute: '2-digit', second: '2-digit' });

    // 更新时间显示
    document.getElementById(`${type}-time-text-${index}`).textContent = `${timeString}: `;

    // 记录测试时间
    timesArray[index - 1] = timeString;

    // 执行计算
    calculateFunction();
}

function createOrUpdateChart(chartInstance, ctx, labels, data, label) {
    if (chartInstance) {
        chartInstance.data.labels = labels;
        chartInstance.data.datasets[0].data = data;
        chartInstance.update();
        return chartInstance;
    } else {
        return new Chart(ctx, {
            type: 'line',
            data: {
                labels: labels,
                datasets: [{
                    label: label,
                    data: data,
                    borderColor: 'rgba(75, 192, 192, 1)',
                    backgroundColor: 'rgba(75, 192, 192, 0.2)',
                    borderWidth: 2,
                    pointRadius: 5,
                    pointBackgroundColor: 'rgba(75, 192, 192, 1)',
                    tension: 0.1
                }]
            },
            options: {
                responsive: true,
                maintainAspectRatio: false,
                scales: {
                    y: {
                        beginAtZero: false
                    }
                }
            }
        });
    }
}

function getNumericInputs(selector) {
    return Array.from(document.querySelectorAll(selector))
        .map(input => parseFloat(input.value))
        .filter(value => !isNaN(value));
}

function updateResultDisplay(id, value, precision = 6) {
    const element = document.getElementById(id);
    if (element) {
        if (value === null || value === undefined || isNaN(value)) {
            element.innerText = '-';
        } else {
            // 格式化数字，去除尾随的0
            const formatted = parseFloat(value.toFixed(precision)).toString();
            element.innerText = formatted;
        }
    }
}

function updateInputPlaceholders() {
    updateInputRows('#repeatability-inputs .input-row', 6);
}

function updateStabilityInputs() {
    updateInputRows('#stability-inputs .input-row', 6);
}

function updateErrorPoints() {
    const pointContainers = document.querySelectorAll('#error-inputs .error-point-container');
    pointContainers.forEach((container, index) => {
        const deleteBtn = container.querySelector('.delete-btn');
        if (pointContainers.length <= 1) {
            deleteBtn.style.visibility = 'hidden';
        } else {
            deleteBtn.style.visibility = 'visible';
        }
    });
}

function updateProjectTitle() {
    const titleInput = document.getElementById('project-title');
    const title = titleInput.value.trim() || '无标题';
    updateDocumentTitle();
    setLocalStorage('projectTitle', title, 365);
}

function updateDocumentTitle() {
    const titleInput = document.getElementById('project-title');
    const title = titleInput.value.trim() || '无标题';
    document.title = `${title} - LabStatistics`;
}

function newProject() {
    if (confirm('确定要新建工程吗？这将清除所有当前数据！')) {
        // 清除所有数据
        clearAllData();
        // 重置标题
        document.getElementById('project-title').value = '';
        updateProjectTitle();
        // 重新初始化页面
        initializePage();
    }
}

function clearAllData() {
    // 清除重复性数据
    const repeatabilityInputs = document.querySelectorAll('#repeatability-inputs .input-row');
    for (let i = 6; i < repeatabilityInputs.length; i++) {
        repeatabilityInputs[i].remove();
    }
    document.querySelectorAll('#repeatability-inputs input[type="number"]').forEach(input => {
        input.value = '';
    });
    repeatabilityTimes = [];

    // 重置重复性时间标签
    for (let i = 1; i <= 6; i++) {
        const timeSpan = document.getElementById(`repeatability-time-text-${i}`);
        if (timeSpan) {
            timeSpan.textContent = `${i}: `;
        }
    }

    // 清除稳定性数据
    const stabilityInputs = document.querySelectorAll('#stability-inputs .input-row');
    for (let i = 6; i < stabilityInputs.length; i++) {
        stabilityInputs[i].remove();
    }
    document.querySelectorAll('#stability-inputs input[type="number"]').forEach(input => {
        input.value = '';
    });
    stabilityTimes = [];

    // 重置稳定性时间标签
    const stabilityTimes = [0, 10, 20, 30, 40, 50];
    for (let i = 1; i <= 6; i++) {
        const timeSpan = document.getElementById(`stability-time-text-${i}`);
        if (timeSpan) {
            timeSpan.textContent = `${stabilityTimes[i-1]}: `;
        }
    }

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

    // 清除自定义参数
    const customParamsContainer = document.getElementById('custom-params-container');
    while (customParamsContainer.firstChild) {
        customParamsContainer.removeChild(customParamsContainer.firstChild);
    }

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

    // 清除结果显示
    document.querySelectorAll('.result-item span').forEach(span => {
        span.innerText = '-';
    });

    // 清除localStorage数据
    removeLocalStorage('repeatabilityData');
    removeLocalStorage('stabilityData');
    removeLocalStorage('errorData');
    removeLocalStorage('customParamsData');
}

function initializePage() {
    // 加载项目标题
    const savedTitle = getLocalStorage('projectTitle');
    if (savedTitle) {
        document.getElementById('project-title').value = savedTitle;
        updateDocumentTitle();
    }

    // 加载自定义参数
    loadCustomParamsFromLocalStorage();

    // 加载重复性、稳定性和示值误差数据
    loadDataFromLocalStorage();
}

// 更新当前时间显示
function updateCurrentTime() {
    const now = new Date();
    const timeString = now.toLocaleTimeString('zh-CN', { hour: '2-digit', minute: '2-digit', second: '2-digit' });
    document.getElementById('current-time').textContent = timeString;
    setTimeout(updateCurrentTime, 1000);
}

// 初始化时启动时间更新
updateCurrentTime();