const express = require('express');
const router = express.Router();
const { v4: uuidv4 } = require('uuid');
const ToolExecutor = require('../services/toolExecutor');
const DEFAULT_TOOLS = require('../config/tools');
const db = require('../db');

const directSessions = new Map();

router.get('/config', (req, res) => {
  res.json({
    success: true,
    data: {
      models: [
        { value: '1.2.1.0', label: 'O2.0（推荐，精品音质）' },
        { value: 'O', label: 'O（基础版）' },
        { value: '2.2.0.0', label: 'SC2.0（推荐，声音复刻）' },
        { value: 'SC', label: 'SC（基础版）' },
      ],
      speakers: [
        { value: 'zh_female_vv_jupiter_bigtts', label: 'VV（活泼女声）', series: 'O' },
        { value: 'zh_female_xiaohe_jupiter_bigtts', label: '小禾（甜美女声·台湾口音）', series: 'O' },
        { value: 'zh_male_yunzhou_jupiter_bigtts', label: '云舟（沉稳男声）', series: 'O' },
        { value: 'zh_male_xiaotian_jupiter_bigtts', label: '小天（磁性男声）', series: 'O' },
        { value: 'saturn_common_female_1', label: 'Saturn 女声1', series: 'SC2.0' },
        { value: 'saturn_common_male_1', label: 'Saturn 男声1', series: 'SC2.0' },
        { value: 'ICL_common_female_1', label: 'ICL 女声1', series: 'SC' },
        { value: 'ICL_common_male_1', label: 'ICL 男声1', series: 'SC' },
      ],
      tools: DEFAULT_TOOLS.map((t) => ({
        name: t.function.name,
        description: t.function.description,
      })),
    },
  });
});

router.post('/direct/session', async (req, res) => {
  try {
    const { userId, sessionId } = req.body || {};
    const sid = sessionId || uuidv4();
    const directSession = {
      sessionId: sid,
      userId: userId || null,
      startTime: Date.now(),
      direct: true,
    };
    directSessions.set(sid, directSession);
    await db.createSession(sid, userId || null, 'voice');
    res.json({
      success: true,
      data: {
        sessionId: sid,
        userId: userId || null,
      },
    });
  } catch (error) {
    console.error('[DirectVoice] Create session failed:', error.message);
    res.status(500).json({ success: false, error: error.message });
  }
});

router.post('/direct/message', async (req, res) => {
  try {
    const { sessionId, role, text, source, toolName } = req.body || {};
    if (!sessionId || !text || !source) {
      return res.status(400).json({ success: false, error: 'sessionId, text and source are required' });
    }
    await db.addMessage(sessionId, role === 'user' ? 'user' : 'assistant', text, source, toolName || null);
    res.json({ success: true });
  } catch (error) {
    console.error('[DirectVoice] Add message failed:', error.message);
    res.status(500).json({ success: false, error: error.message });
  }
});

router.post('/diag', (req, res) => {
  try {
    const { sessionId, roomId, type, payload } = req.body || {};
    console.log(`[Diag] type=${type || 'unknown'} session=${sessionId || '-'} room=${roomId || '-'} payload=${JSON.stringify(payload || {})}`);
    res.json({ success: true });
  } catch (error) {
    console.error('[Diag] Error:', error.message);
    res.status(500).json({ success: false, error: error.message });
  }
});

router.post('/direct/query', async (req, res) => {
  try {
    const { sessionId, query, appendUserMessage } = req.body || {};
    if (!sessionId) {
      return res.status(400).json({ success: false, error: 'sessionId is required' });
    }
    const context = await db.getHistoryForLLM(sessionId, 20).catch(() => []);
    const cleanQuery = (query || '').trim();
    if (appendUserMessage && cleanQuery) {
      await db.addMessage(sessionId, 'user', cleanQuery, 'voice_asr').catch(() => null);
    }
    const result = await ToolExecutor.execute('search_knowledge', { query: cleanQuery }, context);
    let contentText = JSON.stringify(result);
    if (result && result.results && Array.isArray(result.results)) {
      contentText = result.results.map((item) => item.content || JSON.stringify(item)).join('\n');
    } else if (result && result.error) {
      contentText = result.error;
    } else if (typeof result === 'string') {
      contentText = result;
    }
    const ragItems = result && result.results && Array.isArray(result.results) && result.results.length > 0
      ? result.results.map((item) => ({
          title: item.title || '知识库结果',
          content: item.content || JSON.stringify(item),
        }))
      : [{
          title: '知识库结果',
          content: contentText,
        }];
    await db.addMessage(sessionId, 'assistant', contentText, 'voice_tool', 'search_knowledge', {
      route: 'search_knowledge',
      original_text: cleanQuery,
      tool_name: 'search_knowledge',
      tool_args: { query: cleanQuery },
      source: result?.source || null,
      original_query: result?.original_query || cleanQuery,
      rewritten_query: result?.rewritten_query || null,
      selected_dataset_ids: result?.selected_dataset_ids || null,
      selected_kb_routes: result?.selected_kb_routes || null,
      hit: typeof result?.hit === 'boolean' ? result.hit : null,
      reason: result?.reason || null,
      error_type: result?.errorType || null,
      latency_ms: result?.latency_ms || null,
    }).catch(() => null);
    res.json({
      success: true,
      data: {
        sessionId,
        query: cleanQuery,
        contentText,
        ragItems,
        ragJson: JSON.stringify(ragItems),
      },
    });
  } catch (error) {
    console.error('[DirectVoice] Query failed:', error.message);
    res.status(500).json({ success: false, error: error.message });
  }
});

router.post('/direct/stop', async (req, res) => {
  try {
    const { sessionId } = req.body || {};
    if (!sessionId) {
      return res.status(400).json({ success: false, error: 'sessionId is required' });
    }
    directSessions.delete(sessionId);
    const messages = await db.getMessages(sessionId).catch(() => []);
    res.json({
      success: true,
      data: {
        sessionId,
        messageCount: messages.length,
      },
    });
  } catch (error) {
    console.error('[DirectVoice] Stop session failed:', error.message);
    res.status(500).json({ success: false, error: error.message });
  }
});

module.exports = router;