const express = require("express");
const Reward = require("../models/Reward");
const User = require("../models/User");
const auth = require("../middleware/auth");

const router = express.Router();

// Get all rewards
router.get("/", async (req, res) => {
  try {
    const rewards = await Reward.find();
    res.json(rewards);
  } catch (err) {
    console.error(err.message);
    res.status(500).send("Server error");
  }
});

// Create a reward
router.post("/", auth, async (req, res) => {
  const { name, description, cost, isPremium } = req.body;

  try {
    const newReward = new Reward({
      name,
      description,
      cost,
      isPremium,
    });

    const reward = await newReward.save();
    res.json(reward);
  } catch (err) {
    console.error(err.message);
    res.status(500).send("Server error");
  }
});

// Redeem a reward
router.post("/redeem/:id", auth, async (req, res) => {
  try {
    const reward = await Reward.findById(req.params.id);
    if (!reward) {
      return res.status(404).json({ msg: "Reward not found" });
    }

    const user = await User.findById(req.user.id);
    if (!user) {
      return res.status(404).json({ msg: "User not found" });
    }

    if (user.points < reward.cost) {
      return res.status(400).json({ msg: "Not enough points" });
    }

    if (reward.isPremium && !user.isPremium) {
      return res.status(403).json({ msg: "Premium reward not available" });
    }

    user.points -= reward.cost;
    await user.save();

    res.json({ msg: "Reward redeemed successfully" });
  } catch (err) {
    console.error(err.message);
    res.status(500).send("Server error");
  }
});

module.exports = router;