// 加载生成配置列表
async function loadGenerateConfigs() {
    try {
        const response = await fetch('/api/config');
        const result = await response.json();
        
        if (result.success) {
            const container = document.getElementById('generate-config-list');
            container.innerHTML = result.data.map(c => `
                <label style="display: flex; align-items: center; gap: 8px; padding: 6px 0; cursor: pointer;">
                    <input type="checkbox" class="config-checkbox" value="${c.id}" data-name="${c.config_name}">
                    <span>${c.config_name}</span>
                </label>
            `).join('');
            
            initGenerateState();
        }
    } catch (error) {
        console.error('加载配置失败:', error);
    }
}
// 全选/取消全选配置
function toggleSelectAllConfigs() {
    const checkboxes = document.querySelectorAll('.config-checkbox');
    if (checkboxes.length === 0) return;
    
    // 检查是否所有复选框都被选中
    const allChecked = Array.from(checkboxes).every(cb => cb.checked);
    
    // 切换所有复选框的状态
    checkboxes.forEach(cb => {
        cb.checked = !allChecked;
    });
}
// 设置预设时间
function setPresetTime(preset) {
    const now = new Date();
    let start, end;

    if (preset === 'yesterday') {
        end = new Date(now.getFullYear(), now.getMonth(), now.getDate(), 8, 0, 0);
        start = new Date(end.getTime() - 24 * 60 * 60 * 1000);
    } else if (preset === 'last3days') {
        end = new Date(now.getFullYear(), now.getMonth(), now.getDate(), 8, 0, 0);
        start = new Date(end.getTime() - 3 * 24 * 60 * 60 * 1000);
    } else if (preset === 'last7days') {
        end = new Date(now.getFullYear(), now.getMonth(), now.getDate(), 8, 0, 0);
        start = new Date(end.getTime() - 7 * 24 * 60 * 60 * 1000);
    }

    document.getElementById('start-time').value = formatDateTimeLocal(start);
    document.getElementById('end-time').value = formatDateTimeLocal(end);
}

// 格式化日期时间（用于输入框）
function formatDateTimeLocal(date) {
    const year = date.getFullYear();
    const month = String(date.getMonth() + 1).padStart(2, '0');
    const day = String(date.getDate()).padStart(2, '0');
    const hours = String(date.getHours()).padStart(2, '0');
    const minutes = String(date.getMinutes()).padStart(2, '0');
    return `${year}-${month}-${day}T${hours}:${minutes}`;
}

// 格式化日期时间为数字格式（用于显示）
function formatDateTimeDisplay(dateTimeStr) {
    if (!dateTimeStr) return '-';
    // 如果是字符串，直接返回（已经是数字格式）
    if (typeof dateTimeStr === 'string') {
        // 如果是 ISO 格式或其他格式，转换为 YYYY-MM-DD HH:MM:SS
        const date = new Date(dateTimeStr);
        if (!isNaN(date.getTime())) {
            const year = date.getFullYear();
            const month = String(date.getMonth() + 1).padStart(2, '0');
            const day = String(date.getDate()).padStart(2, '0');
            const hours = String(date.getHours()).padStart(2, '0');
            const minutes = String(date.getMinutes()).padStart(2, '0');
            const seconds = String(date.getSeconds()).padStart(2, '0');
            return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
        }
        return dateTimeStr;
    }
    return String(dateTimeStr);
}

// 格式化日期为数字格式（只显示日期，用于显示）
function formatDateDisplay(dateStr) {
    if (!dateStr) return '-';
    const date = new Date(dateStr);
    if (!isNaN(date.getTime())) {
        const year = date.getFullYear();
        const month = String(date.getMonth() + 1).padStart(2, '0');
        const day = String(date.getDate()).padStart(2, '0');
        return `${year}-${month}-${day}`;
    }
    return String(dateStr);
}

let isGenerating = false;
let generatePollTimer = null;

// 保存生成状态到 localStorage
function saveGenerateState(configIds, startTime) {
    const state = {
        configIds: configIds,
        startTime: startTime
    };
    localStorage.setItem('report_generate_state', JSON.stringify(state));
}

// 从 localStorage 读取生成状态
function getGenerateState() {
    const stateStr = localStorage.getItem('report_generate_state');
    if (!stateStr) return null;
    try {
        return JSON.parse(stateStr);
    } catch (e) {
        return null;
    }
}

// 清除生成状态
function clearGenerateState() {
    localStorage.removeItem('report_generate_state');
}

// 检查生成是否完成
async function checkGenerateComplete() {
    const state = getGenerateState();
    if (!state) {
        stopGeneratePolling();
        setGenerateControlsDisabled(false);
        isGenerating = false;
        return;
    }

    const { configIds, startTime } = state;
    
    try {
        const response = await fetch('/api/report/history?page=1&page_size=50');
        const result = await response.json();
        
        if (result.success && result.data && result.data.list) {
            const historyList = result.data.list;
            let allDone = true;
            
            for (const configId of configIds) {
                const configHistory = historyList.filter(h => h.config_id === configId);
                if (configHistory.length === 0) {
                    allDone = false;
                    break;
                }
                const latest = configHistory[0];
                const latestTime = new Date(latest.start_time).getTime();
                if (latestTime < startTime) {
                    allDone = false;
                    break;
                }
            }
            
            if (allDone) {
                stopGeneratePolling();
                clearGenerateState();
                setGenerateControlsDisabled(false);
                isGenerating = false;
                
                const resultDiv = document.getElementById('generate-result');
                if (resultDiv && !resultDiv.innerHTML.includes('生成完成')) {
                    resultDiv.innerHTML = '<div class="alert alert-info">检测到报表已生成完成，请在历史记录中查看。</div>';
                }
            }
        }
    } catch (e) {
        console.error('检查生成状态失败:', e);
    }
}

// 开始轮询
function startGeneratePolling() {
    stopGeneratePolling();
    generatePollTimer = setInterval(checkGenerateComplete, 3000);
}

// 停止轮询
function stopGeneratePolling() {
    if (generatePollTimer) {
        clearInterval(generatePollTimer);
        generatePollTimer = null;
    }
}

// 页面加载时检查生成状态
function initGenerateState() {
    const state = getGenerateState();
    if (state) {
        const { startTime, configIds } = state;
        const now = Date.now();
        const elapsed = now - startTime;
        
        if (elapsed > 30 * 60 * 1000) {
            clearGenerateState();
            return;
        }
        
        isGenerating = true;
        setGenerateControlsDisabled(true);
        startGeneratePolling();
        
        const resultDiv = document.getElementById('generate-result');
        if (resultDiv) {
            let html = '<div class="generate-loading">';
            html += '<div class="generate-loading-header">';
            html += '<div class="spinner"></div>';
            html += '<span class="generate-loading-title">检测到有正在生成的报表</span>';
            html += `<span class="generate-loading-progress">${configIds.length}个配置</span>`;
            html += '</div>';
            html += '<div class="generate-progress-bar">';
            html += '<div class="generate-progress-fill" style="width: 100%; animation: pulse 1.5s ease-in-out infinite;"></div>';
            html += '</div>';
            html += '<div style="font-size: 13px; color: #31708f; margin-top: 4px;">';
            html += '正在后台生成中，完成后将自动恢复...';
            html += '</div>';
            html += '</div>';
            resultDiv.innerHTML = html;
        }
    }
}

// 渲染生成中动态效果
function renderGenerateLoading(configNames, currentIndex) {
    const total = configNames.length;
    const progress = Math.round((currentIndex / total) * 100);
    
    let html = '<div class="generate-loading">';
    
    html += '<div class="generate-loading-header">';
    html += '<div class="spinner"></div>';
    html += '<span class="generate-loading-title">正在生成日报</span>';
    html += `<span class="generate-loading-progress">${currentIndex}/${total}</span>`;
    html += '</div>';
    
    html += '<div class="generate-progress-bar">';
    html += `<div class="generate-progress-fill" style="width: ${progress}%"></div>`;
    html += '</div>';
    
    html += '<div class="generate-item-list">';
    configNames.forEach((name, index) => {
        let status = 'pending';
        let icon = '○';
        let statusText = '等待中';
        
        if (index < currentIndex) {
            status = 'success';
            icon = '✓';
            statusText = '已完成';
        } else if (index === currentIndex) {
            status = 'running';
            icon = '●';
            statusText = '生成中...';
        }
        
        html += `<div class="generate-item ${status}">`;
        html += `<span class="generate-item-icon ${status}">${icon}</span>`;
        html += `<span class="generate-item-name">${name}</span>`;
        html += `<span class="generate-item-status">${statusText}</span>`;
        html += '</div>';
    });
    html += '</div>';
    
    html += '</div>';
    
    const resultDiv = document.getElementById('generate-result');
    if (resultDiv) {
        resultDiv.innerHTML = html;
    }
}

// 生成日报（支持多选）
async function generateReport() {
    if (isGenerating) {
        return;
    }

    const checkboxes = document.querySelectorAll('.config-checkbox:checked');
    const startTime = document.getElementById('start-time').value;
    const endTime = document.getElementById('end-time').value;

    if (checkboxes.length === 0) {
        showToast('请至少选择一个配置');
        return;
    }

    if (!startTime || !endTime) {
        showToast('请选择时间范围');
        return;
    }

    isGenerating = true;
    setGenerateControlsDisabled(true);
    
    const configIds = Array.from(checkboxes).map(cb => parseInt(cb.value));
    const configNames = Array.from(checkboxes).map(cb => cb.dataset.name);
    const generateStartTime = Date.now();
    saveGenerateState(configIds, generateStartTime);
    startGeneratePolling();
    
    renderGenerateLoading(configNames, 0);

    let successCount = 0;
    let failCount = 0;
    let results = [];

    for (let i = 0; i < checkboxes.length; i++) {
        const cb = checkboxes[i];
        const configId = parseInt(cb.value);
        const configName = cb.dataset.name;
        
        renderGenerateLoading(configNames, i);

        try {
            const response = await fetch('/api/report/generate', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    config_id: configId,
                    start_time: startTime.replace('T', ' ') + ':00',
                    end_time: endTime.replace('T', ' ') + ':00'
                })
            });

            const result = await response.json();
            
            if (result.success) {
                successCount++;
                results.push({ name: configName, success: true, ...result });
            } else {
                failCount++;
                results.push({ name: configName, success: false, message: result.message });
            }
        } catch (error) {
            failCount++;
            results.push({ name: configName, success: false, message: error.message });
        }
    }

    // 显示结果
    let html = '<div class="alert alert-info"><strong>生成完成</strong><br><br>';
    html += `成功：${successCount} 个，失败：${failCount} 个<br><br>`;
    
    results.forEach(r => {
        if (r.success) {
            html += `<div style="margin: 10px 0; padding: 10px; background: #f0f8ff; border-radius: 4px;">`;
            html += `<strong>✓ ${r.name}</strong><br>`;
            html += `订单数量：${r.total_orders} 条，总电量：${r.total_degree ? parseFloat(r.total_degree).toFixed(3) : '0.000'} kWh<br>`;
            html += `<a href="/api/download?path=${r.file_path}" target="_blank" class="btn btn-sm btn-success" style="margin-top: 5px;">📥 下载</a>`;
            html += `</div>`;
        } else {
            html += `<div style="margin: 10px 0; padding: 10px; background: #fff0f0; border-radius: 4px;">`;
            html += `<strong>✗ ${r.name}</strong><br>`;
            html += `错误：${r.message}`;
            html += `</div>`;
        }
    });
    
    html += '</div>';
    const resultDiv = document.getElementById('generate-result');
    if (resultDiv) {
        resultDiv.innerHTML = html;
    }

    isGenerating = false;
    setGenerateControlsDisabled(false);
    clearGenerateState();
    stopGeneratePolling();
}

// 设置生成相关控件的禁用状态
function setGenerateControlsDisabled(disabled) {
    const generateBtn = document.getElementById('generate-btn');
    if (generateBtn) {
        generateBtn.disabled = disabled;
        generateBtn.style.opacity = disabled ? '0.6' : '1';
        generateBtn.style.cursor = disabled ? 'not-allowed' : 'pointer';
    }

    document.querySelectorAll('.config-checkbox').forEach(cb => {
        cb.disabled = disabled;
    });

    document.getElementById('start-time').disabled = disabled;
    document.getElementById('end-time').disabled = disabled;
    
    document.querySelectorAll('[onclick^="setPresetTime"]').forEach(btn => {
        btn.style.opacity = disabled ? '0.6' : '1';
        btn.style.pointerEvents = disabled ? 'none' : 'auto';
    });
}