const db = require("../config/database");


class CategoryRepository {


    getAll(householdId) {

        return db.prepare(`

            SELECT categories.*, COUNT(products.id) AS product_count

            FROM categories

            LEFT JOIN products ON products.category_id = categories.id
                AND products.household_id = categories.household_id

            WHERE categories.household_id = ?

            GROUP BY categories.id

            ORDER BY categories.name

        `).all(householdId);

    }


    findById(id, householdId) {

        return db.prepare(`

            SELECT * FROM categories WHERE id = ? AND household_id = ?

        `).get(id, householdId);

    }


    create(data) {

        return db.prepare(`

            INSERT INTO categories (name, icon, household_id)

            VALUES (?, ?, ?)

        `).run(data.name, data.icon || null, data.household_id);

    }


    update(id, householdId, data) {

        return db.prepare(`

            UPDATE categories

            SET name = ?, icon = ?

            WHERE id = ? AND household_id = ?

        `).run(data.name, data.icon || null, id, householdId);

    }


    hasProducts(id, householdId) {

        return db.prepare(`

            SELECT 1 FROM products WHERE category_id = ? AND household_id = ? LIMIT 1

        `).get(id, householdId) !== undefined;

    }


    delete(id, householdId) {

        return db.prepare(`

            DELETE FROM categories WHERE id = ? AND household_id = ?

        `).run(id, householdId);

    }


}


module.exports = new CategoryRepository();