import { Client } from '@modelcontextprotocol/sdk/client/index.js';
import { StreamableHTTPClientTransport } from '@modelcontextprotocol/sdk/client/streamableHttp.js';
import http from 'node:http';
import type { AddressInfo } from 'node:net';
import { describe, expect, it, vi } from 'vitest';
import { createWecomPluginMcpServer, WecomPluginMcpFactory } from './wecom-plugin-mcp.factory';
import type { WecomPluginQueryService } from './wecom-plugin-query.service';
import type { WecomPluginRuntime } from './wecom-plugin.types';

const plugin: WecomPluginRuntime = {
  id: '9',
  name: 'ops-readonly',
  permissions: ['order.read', 'metrics.read'],
};

async function listen(server: http.Server): Promise<string> {
  await new Promise<void>((resolve) => server.listen(0, '127.0.0.1', resolve));
  const { port } = server.address() as AddressInfo;
  return `http://127.0.0.1:${port}/mcp`;
}

describe('WecomPluginMcpFactory Streamable HTTP', () => {
  it('lists only permitted tools and calls query_orders', async () => {
    const query = {
      queryOrders: vi.fn().mockResolvedValue({ total: 1, items: [{ orderNo: 'DK1' }] }),
    } as unknown as WecomPluginQueryService;
    const factory = new WecomPluginMcpFactory(query);
    const httpServer = http.createServer((req, res) => {
      const chunks: Buffer[] = [];
      req.on('data', (chunk) => chunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk)));
      req.on('end', () => {
        const raw = Buffer.concat(chunks).toString('utf8');
        (req as http.IncomingMessage & { body?: unknown }).body = raw ? JSON.parse(raw) : undefined;
        void factory.handle(req, res, plugin);
      });
    });

    const url = await listen(httpServer);
    const client = new Client({ name: 'wecom-plugin-test', version: '1.0.0' });
    const transport = new StreamableHTTPClientTransport(new URL(url));
    try {
      await client.connect(transport);
      const listed = await client.listTools();
      expect(listed.tools.map((t) => t.name).sort()).toEqual(['query_metrics', 'query_orders']);
      const called = await client.callTool({ name: 'query_orders', arguments: { q: 'DK' } });
      expect(called.isError).toBeFalsy();
      const text = called.content.find((c) => c.type === 'text');
      expect(text && 'text' in text ? JSON.parse(text.text) : null).toEqual({
        total: 1,
        items: [{ orderNo: 'DK1' }],
      });
    } finally {
      await client.close().catch(() => undefined);
      await new Promise<void>((resolve, reject) => httpServer.close((err) => (err ? reject(err) : resolve())));
    }
  });

  it('createWecomPluginMcpServer does not register unauthorized tools', () => {
    const query = {} as WecomPluginQueryService;
    const server = createWecomPluginMcpServer(query, plugin, 'alice');
    expect(server).toBeTruthy();
  });
});