import dotenv from "dotenv";
import { productModel } from "../../schemas/product.schema.js";
import log4js from "log4js";
import mongoose from "mongoose";

dotenv.config();

const logger = log4js.getLogger("Products");
logger.level = process.env.LOG_LEVEL;

export const listProductsRouteHandler = async (
  req,
  res,
  page = 1,
  limit = 25,
  property = "",
  filter = {},
) => {
  try {
    // Calculate the skip value based on the page number and limit
    const skip = (page - 1) * limit;

    let product;
    let aggregateCommand = [];

    if (filter != {}) {
      // use filtering if present
      aggregateCommand.push({ $match: filter });
    }

    if (property != "") {
      aggregateCommand.push({ $group: { _id: `$${property}` } }); // group all same properties
      aggregateCommand.push({ $project: { _id: 0, [property]: "$_id" } }); // rename _id to the property name
    } else {
      aggregateCommand.push({ $project: { image: 0, url: 0 } });
    }

    aggregateCommand.push({ $skip: skip });
    aggregateCommand.push({ $limit: Number(limit) });

    console.log(aggregateCommand);

    product = await productModel.aggregate(aggregateCommand);

    logger.trace(
      `List of products (Page ${page}, Limit ${limit}, Property ${property}):`,
      product,
    );
    res.send(product);
  } catch (error) {
    logger.error("Error listing products:", error);
    res.status(500).send({ error: error });
  }
};

export const getProductRouteHandler = async (req, res) => {
  try {
    // Get ID from params
    const id = new mongoose.Types.ObjectId(req.params.id);
    // Fetch the product with the given remote address
    const product = await productModel.findOne({
      _id: id,
    });

    if (!product) {
      logger.warn(`Product not found with supplied id.`);
      return res.status(404).send({ error: "Print job not found." });
    }

    logger.trace(`Product with ID: ${id}:`, product);
    res.send(product);
  } catch (error) {
    logger.error("Error fetching Product:", error);
    res.status(500).send({ error: error.message });
  }
};

export const editProductRouteHandler = async (req, res) => {
  try {
    // Get ID from params
    const id = new mongoose.Types.ObjectId(req.params.id);
    // Fetch the product with the given remote address
    const product = await productModel.findOne({ _id: id });

    if (!product) {
      // Error handling
      logger.warn(`Product not found with supplied id.`);
      return res.status(404).send({ error: "Print job not found." });
    }

    logger.trace(`Product with ID: ${id}:`, product);

    try {
      const { createdAt, updatedAt, started_at, status, ...updateData } =
        req.body;

      const result = await productModel.updateOne(
        { _id: id },
        { $set: updateData },
      );
      if (result.nModified === 0) {
        logger.error("No Product updated.");
        res.status(500).send({ error: "No products updated." });
      }
    } catch (updateError) {
      logger.error("Error updating product:", updateError);
      res.status(500).send({ error: updateError.message });
    }
    res.send("OK");
  } catch (fetchError) {
    logger.error("Error fetching product:", fetchError);
    res.status(500).send({ error: fetchError.message });
  }
};

export const newProductRouteHandler = async (req, res) => {
  try {
    let { ...newProduct } = req.body;
    newProduct = {
      ...newProduct,
      createdAt: new Date(),
      updatedAt: new Date(),
    };

    const result = await productModel.create(newProduct);
    if (result.nCreated === 0) {
      logger.error("No product created.");
      res.status(500).send({ error: "No product created." });
    }
    res.status(200).send(result);
  } catch (updateError) {
    logger.error("Error updating product:", updateError);
    res.status(500).send({ error: updateError.message });
  }
};