// features/cart/cartSlice.js
import { createSlice } from '@reduxjs/toolkit';

const cartSlice = createSlice({
    name: 'cart',
    initialState: {
        items: [],
        total: 0
    },
    reducers: {
        addItem: (state, action) => {
            const existingItem = state.items.find(
                item => item.id === action.payload.id
            );

            if (existingItem) {
                existingItem.quantity += 1;
            } else {
                state.items.push({ ...action.payload, quantity: 1 });
            }

            state.total = state.items.reduce(
                (sum, item) => sum + item.price * item.quantity,
                0
            );
        },

        removeItem: (state, action) => {
            state.items = state.items.filter(item => item.id !== action.payload);
            state.total = state.items.reduce(
                (sum, item) => sum + item.price * item.quantity,
                0
            );
        },

        updateQuantity: (state, action) => {
            const { id, quantity } = action.payload;
            const item = state.items.find(item => item.id === id);

            if (item) {
                item.quantity = quantity;
                if (item.quantity <= 0) {
                    state.items = state.items.filter(i => i.id !== id);
                }
            }

            state.total = state.items.reduce(
                (sum, item) => sum + item.price * item.quantity,
                0
            );
        },

        clearCart: (state) => {
            state.items = [];
            state.total = 0;
        }
    }
});

export const { addItem, removeItem, updateQuantity, clearCart } = cartSlice.actions;
export default cartSlice.reducer;