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


class CategoryRepository {


    getAll() {

        return db.prepare(`

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

            FROM categories

            LEFT JOIN products ON products.category_id = categories.id

            GROUP BY categories.id

            ORDER BY categories.name

        `).all();

    }


    findById(id) {

        return db.prepare(`

            SELECT * FROM categories WHERE id = ?

        `).get(id);

    }


    create(data) {

        return db.prepare(`

            INSERT INTO categories (name, icon)

            VALUES (?, ?)

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

    }


    update(id, data) {

        return db.prepare(`

            UPDATE categories

            SET name = ?, icon = ?

            WHERE id = ?

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

    }


    hasProducts(id) {

        return db.prepare(`

            SELECT 1 FROM products WHERE category_id = ? LIMIT 1

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

    }


    delete(id) {

        return db.prepare(`

            DELETE FROM categories WHERE id = ?

        `).run(id);

    }


}


module.exports = new CategoryRepository();