/**
 * HarmonyOS 知识图谱 Web 可视化服务
 *
 * 启动: npm run web  或  node dist/web.js
 * 访问: http://localhost:3456
 */
import express from 'express';
import * as path from 'path';
import { fileURLToPath } from 'url';
import { graphSearch, graphNeighbors, graphStats, } from './lib/graph.js';
import { isKnowledgeReady, getReferencesRoot, getTotalDocCount } from './lib/knowledge.js';
const __dirname = path.dirname(fileURLToPath(import.meta.url));
const PORT = parseInt(process.env.PORT || '3456');
const app = express();
app.use(express.json());
// ============================================================
// 静态文件
// ============================================================
const publicDir = path.join(__dirname, '..', 'public');
app.use(express.static(publicDir));
// ============================================================
// API
// ============================================================
/** 状态检查 */
app.get('/api/status', (_req, res) => {
    const ready = isKnowledgeReady();
    res.json({
        ready,
        path: getReferencesRoot(),
        docCount: ready ? getTotalDocCount() : 0,
    });
});
/** 图谱统计 */
app.get('/api/stats', (_req, res) => {
    res.json(graphStats());
});
/** 全量图谱数据（精简版，适合前端渲染） */
app.get('/api/graph', (req, res) => {
    const query = req.query.q;
    const type = req.query.type;
    const limit = Math.min(parseInt(req.query.limit) || 300, 1000);
    let nodes;
    if (query) {
        nodes = graphSearch(query, { type, maxResults: limit });
    }
    else {
        // 默认返回 Kit + 模块 + 组件（排除海量 guide 节点）
        nodes = [
            ...graphSearch('', { type: 'kit', maxResults: 50 }),
            ...graphSearch('', { type: 'module', maxResults: 200 }),
            ...graphSearch('', { type: 'component', maxResults: limit }),
        ];
        // 去重
        const seen = new Set();
        nodes = nodes.filter(n => {
            if (seen.has(n.id))
                return false;
            seen.add(n.id);
            return true;
        }).slice(0, limit);
    }
    // 收集这些节点的边
    const nodeIds = new Set(nodes.map(n => n.id));
    const edges = [];
    // 为每个节点取邻居边
    for (const id of nodeIds) {
        const result = graphNeighbors(id, { maxResults: 50 });
        if (result) {
            for (const e of result.edges) {
                if (nodeIds.has(e.from) && nodeIds.has(e.to)) {
                    if (!edges.some(ex => ex.from === e.from && ex.to === e.to && ex.relation === e.relation)) {
                        edges.push(e);
                    }
                }
            }
        }
    }
    res.json({ nodes, edges });
});
/** 单个节点详情 */
app.get('/api/graph/node/:id', (req, res) => {
    const result = graphNeighbors(req.params.id, { maxResults: 100 });
    if (!result) {
        res.status(404).json({ error: 'Node not found' });
        return;
    }
    res.json(result);
});
/** 两个节点间的路径 */
app.get('/api/graph/path', (req, res) => {
    const { from, to } = req.query;
    if (!from || !to) {
        res.status(400).json({ error: 'from and to required' });
        return;
    }
    const { graphPath } = require('./lib/graph.js');
    res.json(graphPath(from, to, 5));
});
// ============================================================
// 启动
// ============================================================
// 根路径返回 index.html
app.get('/', (_req, res) => {
    res.sendFile(path.join(publicDir, 'index.html'));
});
app.listen(PORT, () => {
    console.log('');
    console.log('╔══════════════════════════════════════════════╗');
    console.log('║   HarmonyOS 知识图谱可视化                     ║');
    console.log('╚══════════════════════════════════════════════╝');
    console.log('');
    console.log(`  访问: http://localhost:${PORT}`);
    console.log(`  知识库: ${getReferencesRoot()}`);
    console.log(`  状态: ${isKnowledgeReady() ? `✅ ${getTotalDocCount().toLocaleString()} 篇文档` : '⚠️ 未下载'}`);
    console.log('');
});
//# sourceMappingURL=web.js.map