const CategoryService = require("../services/CategoryService");


class CategoryController {


    index(req, res) {

        res.render("categories/index", {
            title: "Categorieën",
            categories: CategoryService.getCategories(req.user.household_id)
        });

    }


    editForm(req, res) {
        const categoryId = Number.parseInt(req.params.id, 10);
        const category = Number.isInteger(categoryId)
            ? CategoryService.getCategory(categoryId, req.user.household_id)
            : null;

        if (!category) {
            req.flash("error", "Categorie niet gevonden.");
            return res.redirect("/categories");
        }

        res.render("categories/edit", {
            title: "Categorie wijzigen",
            category
        });
    }


    create(req, res) {
        const name = (req.body.name || "").trim();
        const icon = (req.body.icon || "").trim();

        if (!name) {
            req.flash("error", "Geef een categorienaam op.");
            return res.redirect("/categories");
        }

        CategoryService.createCategory({ name, icon, household_id: req.user.household_id });
        req.flash("success", "Categorie toegevoegd.");
        res.redirect("/categories");
    }


    update(req, res) {
        const categoryId = Number.parseInt(req.params.id, 10);
        const name = (req.body.name || "").trim();
        const icon = (req.body.icon || "").trim();

        if (!Number.isInteger(categoryId) || !name) {
            req.flash("error", "Geef een geldige categorienaam op.");
            return res.redirect("/categories");
        }

        const result = CategoryService.updateCategory(categoryId, req.user.household_id, { name, icon });

        if (result.changes === 0) {
            req.flash("error", "Categorie niet gevonden.");
            return res.redirect("/categories");
        }

        req.flash("success", "Categorie gewijzigd.");
        res.redirect("/categories");
    }


    remove(req, res) {
        const categoryId = Number.parseInt(req.params.id, 10);

        if (!Number.isInteger(categoryId)) {
            req.flash("error", "Categorie niet gevonden.");
            return res.redirect("/categories");
        }

        if (CategoryService.categoryHasProducts(categoryId, req.user.household_id)) {
            req.flash(
                "error",
                "Deze categorie is nog aan producten gekoppeld en kan niet worden verwijderd."
            );
            return res.redirect("/categories");
        }

        const result = CategoryService.deleteCategory(categoryId, req.user.household_id);

        if (result.changes === 0) {
            req.flash("error", "Categorie niet gevonden.");
            return res.redirect("/categories");
        }

        req.flash("success", "Categorie verwijderd.");
        res.redirect("/categories");
    }


}


module.exports = new CategoryController();