analytics.js

const express = require("express");
const router = express.Router(); // This line MUST be here

const Product = require("../models/Product");
const Order = require("../models/Order");
const auth = require("../middleware/authMiddleware");

// @desc    Get analytics for logged-in artist
// @route   GET /api/analytics
// @access  Private (Artist only)
router.get("/", auth, async (req, res) => {
  try {
    if (req.user.role !== "artist") {
      return res.status(403).json({ message: "Access denied. Artists only." });
    }

    const artistId = req.user.id;

    // Total products uploaded by artist
    const totalProducts = await Product.countDocuments({ artistId });

    // Find all orders that contain at least one of the artist's products
    const orders = await Order.find({ "items.artistId": artistId });

    let ongoingOrders = 0;
    let completedOrders = 0;
    let totalEarnings = 0;

    orders.forEach((order) => {
      // Check the status of the entire order
      if (order.status === "completed") {
        completedOrders++;
      } else if (order.status === "ongoing") {
        ongoingOrders++;
      }

      // Calculate earnings from this order
      order.items.forEach((item) => {
        if (item.artistId.toString() === artistId.toString()) {
          totalEarnings += item.priceAtPurchase * item.quantity;
        }
      });
    });

    res.json({
      totalProducts,
      ongoingOrders,
      completedOrders,
      totalEarnings,
    });
  } catch (error) {
    console.error(error);
    res.status(500).json({ message: "Server error" });
  }
});

module.exports = router;