const express = require('express');
const mongoose = require('mongoose');
const cors = require('cors');
const app = express();

// Middleware
app.use(cors());
app.use(express.json());

// MongoDB Connection
mongoose.connect('mongodb://localhost:27017/druzz_checker', {
useNewUrlParser: true,
useUnifiedTopology: true
});

// Schema
const reportSchema = new mongoose.Schema({
number: { type: String, unique: true, required: true },
reports: { type: Number, default: 0 },
status: { type: String, enum: ['spam', 'safe'], default: 'safe' },
lastChecked: { type: Date, default: Date.now }
});

const Report = mongoose.model('Report', reportSchema);

// Initialize with some banned numbers
async function initBannedNumbers() {
const banned = ['+509 xxxx Add a number', '+509 Add a number'];
for (const num of banned) {
await Report.findOneAndUpdate(
{ number: num },
{ number: num, reports: 5, status: 'spam' },
{ upsert: true }
);
}
}
initBannedNumbers();

// API Endpoints
app.get('/api/check', async (req, res) => {
try {
const number = req.query.number;
if (!number) {
return res.status(400).json({ error: 'Number required' });
}

// Clean number
const cleanNumber = number.replace(/[\s+]/g, '');

// Find in database
let report = await Report.findOne({ number: cleanNumber });

if (!report) {
// New number - check against patterns
const isSpam = /^\+97155\d{7}$/.test(cleanNumber) ||
/^\+22798\d{6}$/.test(cleanNumber);

report = new Report({
number: cleanNumber,
reports: isSpam ? 3 : 0,
status: isSpam ? 'spam' : 'safe'
});
await report.save();
}

res.json({
status: report.status,
reports: report.reports,
number: cleanNumber,
lastChecked: report.lastChecked
});
} catch (error) {
res.status(500).json({ error: error.message });
}
});

app.post('/api/report', async (req, res) => {
try {
const { number } = req.body;
if (!number) {
return res.status(400).json({ success: false, error: 'Number required' });
}

const cleanNumber = number.replace(/[\s+]/g, '');

let report = await Report.findOne({ number: cleanNumber });

if (report) {
report.reports += 1;
// Auto-mark as spam if reports > 3
if (report.reports > 3) {
report.status = 'spam';
}
} else {
report = new Report({
number: cleanNumber,
reports: 1,
status: 'safe'
});
}

await report.save();

res.json({
success: true,
reports: report.reports,
status: report.status
});
} catch (error) {
res.status(500).json({ success: false, error: error.message });
}
});

// Get all reports (admin)
app.get('/api/reports', async (req, res) => {
try {
const reports = await Report.find().sort({ reports: -1 });
res.json(reports);
} catch (error) {
res.status(500).json({ error: error.message });
}
});

app.listen(3000, () => {
console.log('🚀 DRUZZ Backend running on port 3000');
console.log('📊 MongoDB connected');
});