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

class ShoppingListRepository {

    getByHousehold(householdId) {
        
        return db.prepare(`
            SELECT 
                shopping_lists.*,
                COUNT(shopping_list_items.id) as item_count,
                SUM(CASE WHEN shopping_list_items.checked = 1 THEN 1 ELSE 0 END) as checked_count
            FROM shopping_lists
            LEFT JOIN shopping_list_items 
                ON shopping_lists.id = shopping_list_items.list_id
            WHERE shopping_lists.household_id = ?
            AND shopping_lists.archived = 0
            GROUP BY shopping_lists.id
            ORDER BY shopping_lists.created_at DESC
        `).all(householdId);

    }

    getById(id) {
        
        return db.prepare(`
            SELECT * FROM shopping_lists WHERE id = ?
        `).get(id);

    }

    create(data) {
        
        return db.prepare(`
            INSERT INTO shopping_lists
            (household_id, name)
            VALUES (?, ?)
        `).run(data.household_id, data.name);

    }

    getItems(listId) {
        
        return db.prepare(`
            SELECT 
                shopping_list_items.*,
                products.name as product_name,
                categories.name as category_name,
                categories.icon as category_icon
            FROM shopping_list_items
            JOIN products ON products.id = shopping_list_items.product_id
            LEFT JOIN categories ON categories.id = products.category_id
            WHERE shopping_list_items.list_id = ?
            ORDER BY shopping_list_items.checked ASC, shopping_list_items.sort_order ASC
        `).all(listId);

    }

    addItem(data) {
        
        return db.prepare(`
            INSERT INTO shopping_list_items
            (list_id, product_id, amount)
            VALUES (?, ?, ?)
        `).run(data.list_id, data.product_id, data.amount);

    }

    findItem(listId, itemId) {

        return db.prepare(`
            SELECT id FROM shopping_list_items
            WHERE id = ? AND list_id = ?
        `).get(itemId, listId);

    }

    toggleItem(itemId) {
        
        return db.prepare(`
            UPDATE shopping_list_items
            SET checked = CASE WHEN checked = 1 THEN 0 ELSE 1 END
            WHERE id = ?
        `).run(itemId);

    }

    deleteItem(itemId) {
        
        return db.prepare(`
            DELETE FROM shopping_list_items
            WHERE id = ?
        `).run(itemId);

    }

    archiveList(listId) {
        
        return db.prepare(`
            UPDATE shopping_lists
            SET archived = 1
            WHERE id = ?
        `).run(listId);

    }

}

module.exports = new ShoppingListRepository();