// ============================================================
// Redux Toolkit — UI Slice
// 大厂模式：RTK 管理全局通知队列、异步 loading 等跨模块状态
// ============================================================

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

export type NotificationType = 'success' | 'error' | 'warning' | 'info';

export interface Notification {
  id: string;
  type: NotificationType;
  message: string;
  duration?: number; // ms, default 3000
}

interface UISliceState {
  notifications: Notification[];
  globalLoading: boolean;
}

const initialState: UISliceState = {
  notifications: [],
  globalLoading: false,
};

export const uiSlice = createSlice({
  name: 'ui',
  initialState,
  reducers: {
    addNotification: (state, action: PayloadAction<Omit<Notification, 'id'>>) => {
      state.notifications.push({
        ...action.payload,
        id: `${Date.now()}-${Math.random().toString(36).slice(2)}`,
      });
    },
    removeNotification: (state, action: PayloadAction<string>) => {
      state.notifications = state.notifications.filter((n) => n.id !== action.payload);
    },
    clearNotifications: (state) => {
      state.notifications = [];
    },
    setGlobalLoading: (state, action: PayloadAction<boolean>) => {
      state.globalLoading = action.payload;
    },
  },
});

export const { addNotification, removeNotification, clearNotifications, setGlobalLoading } =
  uiSlice.actions;