import {
    Category 
} from "../../../models/Category";
import {
    AddCategoryInput, 
    AddCategoryResult
} from "./types";

const addCategory = async (userID: string, input: AddCategoryInput): Promise<AddCategoryResult> => {
    try {
        const {
            title,
            index
        } = input;

        const existing = await Category.findOne({
            userID,
            index
        });
        if (existing) {
            return {
                message: "index-already-in-use", 
                code: 409 
            };
        }

        const newCategory = await Category.create({
            userID,
            title,
            index
        });

        return {
            message: "category-created",
            code: 201,
            payload: {
                category: {
                    _id: newCategory._id.toString(),
                    isActive: newCategory.isActive,
                    title: newCategory.title,
                    index: newCategory.index
                }
            }
        };

    } catch (error) {
        console.error("CreateCategory error:", error);
        return {
            message: "internal-server-error",
            code: 500 
        };
    }
};

export default addCategory;