const express = require("express");
const { Op } = require("sequelize");
const { Item, User, Rental } = require("../models"); // Import from models/index.js to get models with associations
const { authenticateToken } = require("../middleware/auth");
const router = express.Router();

router.get("/", async (req, res) => {
  try {
    const {
      minPrice,
      maxPrice,
      location,
      city,
      zipCode,
      search,
      page = 1,
      limit = 20,
    } = req.query;

    const where = {};

    if (minPrice || maxPrice) {
      where.pricePerDay = {};
      if (minPrice) where.pricePerDay[Op.gte] = minPrice;
      if (maxPrice) where.pricePerDay[Op.lte] = maxPrice;
    }
    if (location) where.location = { [Op.iLike]: `%${location}%` };
    if (city) where.city = { [Op.iLike]: `%${city}%` };
    if (zipCode) where.zipCode = { [Op.iLike]: `%${zipCode}%` };
    if (search) {
      where[Op.or] = [
        { name: { [Op.iLike]: `%${search}%` } },
        { description: { [Op.iLike]: `%${search}%` } },
      ];
    }

    const offset = (page - 1) * limit;

    const { count, rows } = await Item.findAndCountAll({
      where,
      include: [
        {
          model: User,
          as: "owner",
          attributes: ["id", "username", "firstName", "lastName"],
        },
      ],
      limit: parseInt(limit),
      offset: parseInt(offset),
      order: [["createdAt", "DESC"]],
    });

    res.json({
      items: rows,
      totalPages: Math.ceil(count / limit),
      currentPage: parseInt(page),
      totalItems: count,
    });
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

router.get("/recommendations", authenticateToken, async (req, res) => {
  try {
    const userRentals = await Rental.findAll({
      where: { renterId: req.user.id },
      include: [{ model: Item, as: "item" }],
    });

    // For now, just return random available items as recommendations
    const recommendations = await Item.findAll({
      where: {
        availability: true,
      },
      limit: 10,
      order: [["createdAt", "DESC"]],
    });

    res.json(recommendations);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

router.get("/:id", async (req, res) => {
  try {
    const item = await Item.findByPk(req.params.id, {
      include: [
        {
          model: User,
          as: "owner",
          attributes: ["id", "username", "firstName", "lastName"],
        },
      ],
    });

    if (!item) {
      return res.status(404).json({ error: "Item not found" });
    }

    res.json(item);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

router.post("/", authenticateToken, async (req, res) => {
  try {
    const item = await Item.create({
      ...req.body,
      ownerId: req.user.id,
    });

    const itemWithOwner = await Item.findByPk(item.id, {
      include: [
        {
          model: User,
          as: "owner",
          attributes: ["id", "username", "firstName", "lastName"],
        },
      ],
    });

    res.status(201).json(itemWithOwner);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

router.put("/:id", authenticateToken, async (req, res) => {
  try {
    const item = await Item.findByPk(req.params.id);

    if (!item) {
      return res.status(404).json({ error: "Item not found" });
    }

    if (item.ownerId !== req.user.id) {
      return res.status(403).json({ error: "Unauthorized" });
    }

    await item.update(req.body);

    const updatedItem = await Item.findByPk(item.id, {
      include: [
        {
          model: User,
          as: "owner",
          attributes: ["id", "username", "firstName", "lastName"],
        },
      ],
    });

    res.json(updatedItem);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

router.delete("/:id", authenticateToken, async (req, res) => {
  try {
    const item = await Item.findByPk(req.params.id);

    if (!item) {
      return res.status(404).json({ error: "Item not found" });
    }

    if (item.ownerId !== req.user.id) {
      return res.status(403).json({ error: "Unauthorized" });
    }

    await item.destroy();
    res.status(204).send();
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

module.exports = router;