const express = require('express');
const mongoose = require('mongoose');
const cors = require('cors');
const multer = require('multer');
const path = require('path');
const { parseMT5Report } = require('./utils/parser');
const Report = require('./models/Report');

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

// MongoDB Connection
mongoose.connect('mongodb://localhost:27017/mt5_analyzer');

// Multer Storage
const storage = multer.diskStorage({
  destination: (req, file, cb) => cb(null, 'uploads/'),
  filename: (req, file, cb) => cb(null, Date.now() + '-' + file.originalname),
});
const upload = multer({ storage });

// API: Upload & Decode
app.post('/api/upload', upload.fields([{ name: 'htmlFile' }, { name: 'images' }]), async (req, res) => {
  try {
    const htmlFile = req.files['htmlFile'][0];
    const imageFiles = req.files['images'] || [];

    // Parse logic
    const parsedDeals = parseMT5Report(htmlFile.path);

    // Extract Account ID from filename (ReportTester-"_ID_".html)
    const filename = htmlFile.originalname;
    const accountId = filename.split('-')[1] || 'Unknown';

    const newReport = new Report({
      accountId,
      deals: parsedDeals,
      images: imageFiles.map(f => f.path)
    });

    await newReport.save();
    res.json({ success: true, report: newReport });
  } catch (err) {
    console.error(err);
    res.status(500).json({ error: 'Failed to process report' });
  }
});

// API: Get All Reports
app.get('/api/reports', async (req, res) => {
  const reports = await Report.find().sort({ uploadDate: -1 });
  res.json(reports);
});

app.listen(5000, () => console.log('Server running on port 5000'));