const express = require('express');
const cors = require('cors');
const dotenv = require('dotenv');
const Groq = require('groq-sdk');
const { createClient } = require('@supabase/supabase-js');
const ws = require('ws');

// Fix for Supabase Realtime in Node < 22
global.WebSocket = ws;

dotenv.config();

const app = express();
app.use(cors());
app.use(express.json());
app.use(express.static('./'));

// Initialize Supabase
const supabase = createClient(
    process.env.SUPABASE_URL,
    process.env.SUPABASE_ANON_KEY
);

const groq = new Groq({
    apiKey: process.env.GROQ_API_KEY
});

const PORT = process.env.PORT || 7860;

// API: Generate Gig Content
app.post('/api/generate-gig', async (req, res) => {
    const { topic, category } = req.body;

    if (!topic) return res.status(400).json({ error: 'Topic is required' });

    try {
        const prompt = `Create a professional freelance gig for a platform like Fiverr or Upwork.
        Topic: ${topic}
        Category: ${category}
        
        Provide:
        1. A catchy title starting with "I will..."
        2. A detailed, high-converting description (300-500 words).
        3. 5 relevant tags.
        
        Format as JSON: { "title": "...", "description": "...", "tags": ["...", "..."] }`;

        const chatCompletion = await groq.chat.completions.create({
            messages: [{ role: 'user', content: prompt }],
            model: 'llama3-8b-8192',
            response_format: { type: 'json_object' }
        });

        const result = JSON.parse(chatCompletion.choices[0].message.content);
        res.json(result);
    } catch (error) {
        console.error('Groq Error:', error);
        res.status(500).json({ error: 'Failed to generate gig content' });
    }
});

// API: Healthcheck / Supabase Test
app.get('/api/health', async (req, res) => {
    res.json({ status: 'ok', supabase: !!supabase });
});

app.listen(PORT, '0.0.0.0', () => {
    console.log(`🚀 GigSync AI Backend running on port ${PORT}`);
});