import Category from "../models/categoryModel.js";
import asyncHandler from "../middleware/asyncHandler.js";

const createCategory = asyncHandler(async (req, res) => {
  try {
    const { name } = req.body;

    if (!name) {
      return res.json({ error: "Name is totally required" });
    }

    const existingCategory = await Category.findOne({ name });

    if (existingCategory) {
      return res.json({ error: "Already exists" });
    }

    const category = await new Category({ name }).save()
    res.json(category)

  } catch (error) {
    console.log(error);
    return res.status(400).json(error);
  }
});

const updateCategory = asyncHandler(async (req, res) => {
    try {
        const { name } = req.body;
        const { categoryId } = req.params;
    
        const category = await Category.findOne({ _id: categoryId });
    
        if (!category) {
          return res.status(404).json({ error: "Category not found" });
        }
    
        category.name = name;
    
        const updatedCategory = await category.save();
        res.json(updatedCategory);
      } catch (error) {
        console.error(error);
        res.status(500).json({ error: "Internal server error" });
      }
})

const removeCategory = asyncHandler(async(req, res) => {
    try{

        const removed = await Category.findByIdAndDelete(req.params.categoryId)
        res.json(removed)


    } catch(error){
        console.log(error)
        res.status(500).json({error: "Internal server error"})
    }
})

const listCategory = asyncHandler(async(req, res) => {
    try{

        const allCategory = await Category.find({})
        res.json(allCategory)

    } catch(error){
        console.log(error)
        res.status(400).json(error.message)
    }
})

const readCategory = asyncHandler(async(req, res) => {
    try{
        
        const category = await Category.findOne({_id: req.params.id})
        res.json(category)

    }catch(error){
        console.log(error)
        return res.status(400).json(error.message)
    }
})

export { 
    createCategory, 
    updateCategory,
    removeCategory,
    listCategory,
    readCategory
};