// Hookd Relay — AI processing bridge between Chrome extension and Horus agents
const express = require('express');
const cors = require('cors');
const fs = require('fs');
const path = require('path');

const app = express();
app.use(cors());
app.use(express.json({ limit: '10mb' }));

const ITEMS_FILE = '/root/.openclaw/workspace/chrome-extensions/hookd/hookd-items.json';
const RELAY_PORT = 4321;

// Categories for AI classification
const CATEGORIES = ['AI', 'News', 'Ideas', 'Memes', 'Other'];

// Simple keyword-based classifier (fallback when no LLM available)
function classifyWithKeywords(text) {
  const lower = text.toLowerCase();
  if (/ai|gpt|llm|model|changelog|gpu|cuda|neural|openai|anthropic|gemini|claude|chatbot/.test(lower)) return 'AI';
  if (/news|breaking|launch|report|announced|released|updated|version|update/.test(lower)) return 'News';
  if (/idea|concept|thought|what if|imagine|inspiration| brainstorm/.test(lower)) return 'Ideas';
  if (/meme|lmao|lol|funny|rofl|comedy|😂|wtf|brokie/.test(lower)) return 'Memes';
  return 'Other';
}

// Score relevance 1-10 based on keywords and engagement signals
function scoreRelevance(text, item) {
  let score = 5;
  const lower = text.toLowerCase();
  if (/important|breaking|urgent|alert/.test(lower)) score += 2;
  if (/tutorial|guide|how to|explained/.test(lower)) score += 1;
  if (/deal|discount|free|offer|save/.test(lower)) score += 1;
  if (item.type === 'dm') score += 1;
  return Math.min(10, score);
}

// --- Routes ---

// Health / status
app.get('/status', (req, res) => {
  res.json({ ok: true, relay: 'hookd', timestamp: new Date().toISOString() });
});

// Get all items (for Horus agents)
app.get('/items', (req, res) => {
  try {
    if (!fs.existsSync(ITEMS_FILE)) return res.json({ items: [] });
    const raw = fs.readFileSync(ITEMS_FILE, 'utf8');
    res.json({ items: JSON.parse(raw) });
  } catch (e) {
    res.status(500).json({ error: e.message });
  }
});

// Save items from extension
app.post('/items', (req, res) => {
  try {
    let existing = [];
    if (fs.existsSync(ITEMS_FILE)) {
      existing = JSON.parse(fs.readFileSync(ITEMS_FILE, 'utf8'));
    }
    const newItems = req.body.items || [];
    newItems.forEach(item => {
      item.id = item.id || Date.now();
      item.saved = true;
      item.time = item.time || new Date().toISOString();
      existing.unshift(item);
    });
    fs.writeFileSync(ITEMS_FILE, JSON.stringify(existing, null, 2));
    res.json({ success: true, count: newItems.length, total: existing.length });
  } catch (e) {
    res.status(500).json({ error: e.message });
  }
});

// Process items with AI (keyword-based + hook into Horus if available)
app.post('/process', async (req, res) => {
  try {
    const { items } = req.body;
    if (!items || !Array.isArray(items)) return res.status(400).json({ error: 'items array required' });

    const results = [];

    // Try to call Horus agent for AI analysis
    let agentAnalysis = null;
    try {
      // Call Horus via local Hermes CLI
      const { execSync } = require('child_process');
      const content = items.map(i => `[${i.id}] @${i.author}: ${i.content || ''}`).join('\n');
      const analysis = execSync(
        `cd /root/.hermes && echo '${content.replace(/'/g, "'\\''")}' | timeout 20 hermes --model claude-sonnet-4 --no-stream "Analyze these X posts and for each one respond with ONLY valid JSON: {id, score(1-10), category(AI/News/Ideas/Memes/Other), summary, tags}. Items: ${content}" 2>/dev/null`,
        { timeout: 25000 }
      ).toString();
      agentAnalysis = JSON.parse(analysis);
    } catch {
      // Agent not available or parse failed — fall back to keywords
    }

    items.forEach(item => {
      const text = `${item.content || ''} ${item.author || ''}`;
      let result;

      if (agentAnalysis && agentAnalysis.find(a => a.id === item.id)) {
        result = agentAnalysis.find(a => a.id === item.id);
      } else {
        const category = classifyWithKeywords(text);
        const score = scoreRelevance(text, item);
        result = {
          id: item.id,
          category,
          score,
          summary: text.slice(0, 80) + '...',
          tags: [category, score >= 7 ? 'high-value' : 'normal']
        };
      }

      results.push(result);
    });

    // Also save processed items to hookd-items.json
    if (fs.existsSync(ITEMS_FILE)) {
      const stored = JSON.parse(fs.readFileSync(ITEMS_FILE, 'utf8'));
      const updated = stored.map(item => {
        const processed = results.find(r => r.id === item.id);
        if (processed) {
          return { ...item, aiProcessed: true, ...processed };
        }
        return item;
      });
      fs.writeFileSync(ITEMS_FILE, JSON.stringify(updated, null, 2));
    }

    res.json({ success: true, results });
  } catch (e) {
    res.status(500).json({ error: e.message });
  }
});

// Delete items
app.delete('/items', (req, res) => {
  try {
    const { ids } = req.body;
    if (!fs.existsSync(ITEMS_FILE)) return res.json({ success: true, deleted: 0 });
    let items = JSON.parse(fs.readFileSync(ITEMS_FILE, 'utf8'));
    const before = items.length;
    items = items.filter(i => !ids.includes(String(i.id)));
    fs.writeFileSync(ITEMS_FILE, JSON.stringify(items, null, 2));
    res.json({ success: true, deleted: before - items.length });
  } catch (e) {
    res.status(500).json({ error: e.message });
  }
});

// Export items as JSON (for download)
app.get('/export', (req, res) => {
  try {
    if (!fs.existsSync(ITEMS_FILE)) return res.json({ items: [] });
    const items = JSON.parse(fs.readFileSync(ITEMS_FILE, 'utf8'));
    res.setHeader('Content-Disposition', 'attachment; filename=hookd-export.json');
    res.json({ items });
  } catch (e) {
    res.status(500).json({ error: e.message });
  }
});

app.listen(RELAY_PORT, '127.0.0.1', () => {
  console.log(`Hookd Relay running on http://127.0.0.1:${RELAY_PORT}`);
});