import { createSlice, PayloadAction } from '@reduxjs/toolkit';

export interface Customer {
  _id: string;
  name: string;
  email: string;
  totalOrders: number;
  totalSpent: number;
}

interface CustomerState {
  customers: Customer[];
  loading: boolean;
  error: string | null;
}

const initialState: CustomerState = {
  customers: [],
  loading: false,
  error: null,
};

const customerSlice = createSlice({
  name: 'customers',
  initialState,
  reducers: {
    setCustomers: (state, action: PayloadAction<Customer[]>) => {
      state.customers = action.payload;
    },
    addCustomer: (state, action: PayloadAction<Customer>) => {
      state.customers.push(action.payload);
    },
    updateCustomer: (state, action: PayloadAction<Customer>) => {
      const index = state.customers.findIndex(c => c._id === action.payload._id);
      if (index !== -1) state.customers[index] = action.payload;
    },
    setLoading: (state, action: PayloadAction<boolean>) => {
      state.loading = action.payload;
    },
    setError: (state, action: PayloadAction<string | null>) => {
      state.error = action.payload;
    },
  },
});

export const { setCustomers, addCustomer, updateCustomer, setLoading, setError } = customerSlice.actions;
export default customerSlice.reducer;