import { describe, it } from 'node:test';
import assert from 'node:assert/strict';
import { spawn } from 'node:child_process';

function rpc(proc, obj) {
  return new Promise((resolve) => {
    const onData = (buf) => {
      const lines = String(buf).split('\n').filter(Boolean);
      for (const l of lines) {
        try {
          const msg = JSON.parse(l);
          if (msg.id === obj.id) {
            proc.stdout.off('data', onData);
            resolve(msg);
            return;
          }
        } catch {}
      }
    };
    proc.stdout.on('data', onData);
    proc.stdin.write(JSON.stringify(obj) + '\n');
  });
}

describe('NewTube MCP server (stdio)', () => {
  it('initialize + tools/list expose 11 outils dont transcript', async () => {
    const proc = spawn(process.execPath, ['./mcp/server.mjs'], { env: { ...process.env, NEWTUBE_API_URL: 'http://127.0.0.1:9/api' } });
    try {
      const init = await rpc(proc, { jsonrpc: '2.0', id: 1, method: 'initialize', params: {} });
      assert.equal(init.result.serverInfo.name, 'newtube');
      assert.ok(init.result.capabilities.tools);

      const list = await rpc(proc, { jsonrpc: '2.0', id: 2, method: 'tools/list', params: {} });
      const names = list.result.tools.map((t) => t.name);
      for (const expected of ['search_videos', 'suggest_queries', 'get_video_details', 'get_trending', 'get_transcript', 'get_transcript_text', 'health_check', 'list_playlists', 'list_likes', 'list_subscriptions', 'list_watch_history']) {
        assert.ok(names.includes(expected), `outil manquant: ${expected}`);
      }
      const tr = list.result.tools.find((t) => t.name === 'get_transcript');
      assert.ok(tr.inputSchema.properties.provider);
      assert.ok(tr.inputSchema.properties.videoId);

      const ping = await rpc(proc, { jsonrpc: '2.0', id: 3, method: 'ping', params: {} });
      assert.deepEqual(ping.result, {});
    } finally {
      proc.kill();
    }
  });

  it('validation locale sans API (q trop court -> isError)', async () => {
    const proc = spawn(process.execPath, ['./mcp/server.mjs'], { env: { ...process.env, NEWTUBE_API_URL: 'http://127.0.0.1:9/api' } });
    try {
      const call = await rpc(proc, {
        jsonrpc: '2.0', id: 10, method: 'tools/call',
        params: { name: 'search_videos', arguments: { q: 'x' } },
      });
      assert.equal(call.result.isError, true);
      assert.match(call.result.content[0].text, /min 2/);
    } finally {
      proc.kill();
    }
  });
});