/**
 * 主应用逻辑
 */
class App {
    constructor() {
        this.data = null;
        this.treeView = null;
        this.currentFeature = null;
        this.init();
    }

    /**
     * 初始化应用
     */
    async init() {
        try {
            await this.loadData();
            this.initComponents();
            this.bindEvents();
            this.updateStats();
        } catch (error) {
            console.error('初始化失败:', error);
            this.showError('加载失败，请刷新页面重试');
        }
    }

    /**
     * 加载数据
     */
    async loadData() {
        try {
            const response = await fetch('data/data.json');
            if (!response.ok) {
                throw new Error(`HTTP error! status: ${response.status}`);
            }
            this.data = await response.json();
        } catch (error) {
            console.error('加载数据失败:', error);
            throw error;
        }
    }

    /**
     * 初始化组件
     */
    initComponents() {
        // 初始化树形菜单
        const treeContainer = document.getElementById('tree-container');
        this.treeView = new TreeView(treeContainer, this.data);

        // 设置节点点击回调
        this.treeView.onNodeClick = (node) => {
            this.handleNodeClick(node);
        };

        // 默认展开第一层
        this.treeView.expandFirstLevel();
    }

    /**
     * 绑定事件
     */
    bindEvents() {
        // 搜索
        const searchInput = document.getElementById('search-input');
        const searchBtn = document.getElementById('search-btn');

        let searchTimer = null;
        searchInput?.addEventListener('input', (e) => {
            clearTimeout(searchTimer);
            searchTimer = setTimeout(() => {
                this.treeView.search(e.target.value);
            }, 300);
        });

        searchBtn?.addEventListener('click', () => {
            this.treeView.search(searchInput.value);
        });

        // 全部折叠
        const collapseBtn = document.getElementById('collapse-all');
        collapseBtn?.addEventListener('click', () => {
            this.treeView.collapseAll();
        });

        // 状态筛选
        const filterStatus = document.getElementById('filter-status');
        filterStatus?.addEventListener('change', () => {
            this.filterByStatus(filterStatus.value);
        });

        // 排序
        const sortBy = document.getElementById('sort-by');
        sortBy?.addEventListener('change', () => {
            this.sortData(sortBy.value);
        });

        // 主题切换
        const themeToggle = document.getElementById('theme-toggle');
        themeToggle?.addEventListener('click', () => {
            this.toggleTheme();
        });
    }

    /**
     * 处理节点点击
     * @param {Object} node - 节点数据
     */
    handleNodeClick(node) {
        const panelTitle = document.getElementById('panel-title');
        const panelInfo = document.getElementById('panel-info');
        const cardsContainer = document.getElementById('cards-container');

        if (node.type === 'feature' && node.data) {
            // 点击特征节点，显示搜索结果
            this.currentFeature = node.data;

            // 更新标题
            panelTitle.textContent = `"${node.label}" 的搜索结果`;

            // 构建详细的搜索信息
            const metadata = node.data.search_metadata;
            if (metadata && metadata.status === 'success') {
                // 有搜索结果，显示完整参数
                const params = metadata.search_params || {};
                panelInfo.innerHTML = `
                    <div style="display: flex; gap: 2rem; flex-wrap: wrap;">
                        <span><strong>搜索词:</strong> ${params.keyword || '未知'}</span>
                        <span><strong>内容类型:</strong> ${params.content_type || '未知'}</span>
                        <span><strong>排序方式:</strong> ${params.sort_type || '未知'}</span>
                        <span><strong>结果:</strong> <span style="color: var(--secondary-color); font-weight: 600;">${metadata.note_count || 0} 条帖子</span></span>
                    </div>
                `;
            } else if (metadata && metadata.status === 'failed') {
                // 搜索失败
                panelInfo.innerHTML = `
                    <span style="color: var(--danger-color);">搜索失败</span>
                `;
            } else if (node.searchWord === null) {
                // search_word 为 null（重复被过滤）
                panelInfo.innerHTML = `
                    <span style="color: var(--warning-color);">该特征的搜索词与其他特征重复，已被过滤</span>
                `;
            } else {
                // 待搜索
                panelInfo.innerHTML = `
                    <span style="color: var(--text-secondary);">待搜索</span>
                    ${node.searchWord ? ` - 搜索词: ${node.searchWord}` : ''}
                `;
            }

            // 渲染帖子卡片
            if (node.data.search_result) {
                const notes = node.data.search_result.data?.data || [];

                // 存储到全局变量供 CardRenderer 使用
                window.__currentNotes = notes;

                CardRenderer.renderNotes(notes, cardsContainer);
            } else {
                cardsContainer.innerHTML = `
                    <div class="empty-state">
                        <div class="empty-icon">⏳</div>
                        <p class="empty-text">该特征暂无搜索结果</p>
                    </div>
                `;
            }
        } else if (node.type === 'association') {
            // 点击关联分类，显示特征列表
            const features = node.data.特征列表 || [];
            const jaccardScore = (node.data['Jaccard相似度'] * 100).toFixed(1);
            panelTitle.textContent = node.label;
            panelInfo.innerHTML = `
                <span>共 ${features.length} 个特征</span>
                <span style="margin-left: 2rem; color: var(--secondary-color); font-weight: 600;">
                    Jaccard相似度: ${jaccardScore}%
                </span>
            `;

            this.renderFeatureList(features, cardsContainer);
        } else if (node.type === 'result') {
            // 点击结果项，显示概览
            panelTitle.textContent = node.label;
            panelInfo.textContent = `共 ${node.children?.length || 0} 个关联分类`;

            this.renderResultOverview(node.data, cardsContainer);
        } else if (node.type === 'note') {
            // 点击单个帖子，显示该帖子详情
            window.__currentNotes = [node.data];
            CardRenderer.renderNotes([node.data], cardsContainer);
        }
    }

    /**
     * 渲染特征列表
     * @param {Array} features - 特征数组
     * @param {HTMLElement} container - 容器元素
     */
    renderFeatureList(features, container) {
        const html = `
            <div style="padding: 1rem;">
                <table style="width: 100%; border-collapse: collapse;">
                    <thead>
                        <tr style="border-bottom: 2px solid var(--border-color);">
                            <th style="padding: 0.75rem; text-align: left;">特征名称</th>
                            <th style="padding: 0.75rem; text-align: left;">搜索词</th>
                            <th style="padding: 0.75rem; text-align: center;">帖子数</th>
                            <th style="padding: 0.75rem; text-align: center;">状态</th>
                        </tr>
                    </thead>
                    <tbody>
                        ${features.map(feature => {
                            const noteCount = feature.search_metadata?.note_count || 0;
                            const status = feature.search_metadata?.status || 'pending';
                            const statusText = {
                                success: '成功',
                                failed: '失败',
                                pending: '待搜索'
                            }[status] || '未知';
                            const statusColor = {
                                success: 'var(--secondary-color)',
                                failed: 'var(--danger-color)',
                                pending: 'var(--warning-color)'
                            }[status] || 'var(--text-secondary)';

                            return `
                                <tr style="border-bottom: 1px solid var(--border-color);">
                                    <td style="padding: 0.75rem;">${feature.特征名称}</td>
                                    <td style="padding: 0.75rem; color: var(--text-secondary);">
                                        ${feature.search_word || '-'}
                                    </td>
                                    <td style="padding: 0.75rem; text-align: center;">
                                        ${noteCount}
                                    </td>
                                    <td style="padding: 0.75rem; text-align: center;">
                                        <span style="color: ${statusColor}; font-weight: 600;">
                                            ${statusText}
                                        </span>
                                    </td>
                                </tr>
                            `;
                        }).join('')}
                    </tbody>
                </table>
            </div>
        `;
        container.innerHTML = html;
    }

    /**
     * 渲染结果概览
     * @param {Object} result - 结果数据
     * @param {HTMLElement} container - 容器元素
     */
    renderResultOverview(result, container) {
        const html = `
            <div style="padding: 2rem;">
                <div style="margin-bottom: 2rem;">
                    <h3 style="margin-bottom: 1rem;">基本信息</h3>
                    <div style="display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem;">
                        <div style="padding: 1rem; background: var(--bg-color); border-radius: 8px;">
                            <div style="color: var(--text-secondary); font-size: 0.875rem;">原始特征名称</div>
                            <div style="font-size: 1.25rem; font-weight: 600; margin-top: 0.5rem;">
                                ${result.原始特征名称}
                            </div>
                        </div>
                        <div style="padding: 1rem; background: var(--bg-color); border-radius: 8px;">
                            <div style="color: var(--text-secondary); font-size: 0.875rem;">人设特征名称</div>
                            <div style="font-size: 1.25rem; font-weight: 600; margin-top: 0.5rem;">
                                ${result.最高匹配信息?.人设特征名称 || '-'}
                            </div>
                        </div>
                        <div style="padding: 1rem; background: var(--bg-color); border-radius: 8px;">
                            <div style="color: var(--text-secondary); font-size: 0.875rem;">来源层级</div>
                            <div style="font-size: 1.25rem; font-weight: 600; margin-top: 0.5rem;">
                                ${result.来源层级}
                            </div>
                        </div>
                        <div style="padding: 1rem; background: var(--bg-color); border-radius: 8px;">
                            <div style="color: var(--text-secondary); font-size: 0.875rem;">关联数量</div>
                            <div style="font-size: 1.25rem; font-weight: 600; margin-top: 0.5rem;">
                                ${result.找到的关联?.length || 0} 个
                            </div>
                        </div>
                    </div>
                </div>

                <div>
                    <h3 style="margin-bottom: 1rem;">关联分类</h3>
                    <div style="display: flex; flex-direction: column; gap: 0.5rem;">
                        ${(result.找到的关联 || []).map(assoc => `
                            <div style="padding: 1rem; background: var(--bg-color); border-radius: 8px; display: flex; justify-content: space-between; align-items: center;">
                                <div>
                                    <div style="font-weight: 600;">${assoc.目标分类路径}</div>
                                    <div style="font-size: 0.875rem; color: var(--text-secondary); margin-top: 0.25rem;">
                                        ${assoc.特征列表?.length || 0} 个特征
                                    </div>
                                </div>
                                <div style="text-align: right; font-size: 0.875rem; color: var(--text-secondary);">
                                    Jaccard: ${(assoc['Jaccard相似度'] * 100).toFixed(1)}%
                                </div>
                            </div>
                        `).join('')}
                    </div>
                </div>
            </div>
        `;
        container.innerHTML = html;
    }

    /**
     * 按状态筛选
     * @param {string} status - 状态值
     */
    filterByStatus(status) {
        // TODO: 实现筛选逻辑
        console.log('筛选状态:', status);
    }

    /**
     * 排序数据
     * @param {string} sortBy - 排序方式
     */
    sortData(sortBy) {
        // TODO: 实现排序逻辑
        console.log('排序方式:', sortBy);
    }

    /**
     * 切换主题
     */
    toggleTheme() {
        const body = document.body;
        const themeToggle = document.getElementById('theme-toggle');

        if (body.classList.contains('dark-theme')) {
            body.classList.remove('dark-theme');
            themeToggle.textContent = '🌙';
            localStorage.setItem('theme', 'light');
        } else {
            body.classList.add('dark-theme');
            themeToggle.textContent = '☀️';
            localStorage.setItem('theme', 'dark');
        }
    }

    /**
     * 更新统计数据
     */
    updateStats() {
        const statResults = document.getElementById('stat-results');
        const statFeatures = document.getElementById('stat-features');
        const statNotes = document.getElementById('stat-notes');

        // 统计数据
        let totalFeatures = 0;
        let totalNotes = 0;

        this.data.forEach(result => {
            (result.找到的关联 || []).forEach(assoc => {
                (assoc.特征列表 || []).forEach(feature => {
                    totalFeatures++;
                    if (feature.search_metadata?.note_count) {
                        totalNotes += feature.search_metadata.note_count;
                    }
                });
            });
        });

        statResults.textContent = this.data.length;
        statFeatures.textContent = totalFeatures;
        statNotes.textContent = totalNotes;
    }

    /**
     * 显示错误
     * @param {string} message - 错误消息
     */
    showError(message) {
        const treeContainer = document.getElementById('tree-container');
        const cardsContainer = document.getElementById('cards-container');

        treeContainer.innerHTML = `<div class="empty-state"><div class="empty-icon">❌</div><p>${message}</p></div>`;
        cardsContainer.innerHTML = `<div class="empty-state"><div class="empty-icon">❌</div><p>${message}</p></div>`;
    }
}

// 初始化应用
if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', () => {
        new App();
    });
} else {
    new App();
}

// 恢复主题设置
const savedTheme = localStorage.getItem('theme');
if (savedTheme === 'dark') {
    document.body.classList.add('dark-theme');
    const themeToggle = document.getElementById('theme-toggle');
    if (themeToggle) themeToggle.textContent = '☀️';
}