import { createSlice, PayloadAction } from '@reduxjs/toolkit';
import { RootState } from '@/states/store';
import { workSelectionSlice } from './workSlice';
import { historySelectionSlice } from './history';

/**
 * 选中患者的照片信息状态
 */
interface SelectedPatientState {
  patientId: string | null;
  patientName: string | null;
  portraitStatus: string | null;
  portraitFile: string | null;
}

const initialState: SelectedPatientState = {
  patientId: null,
  patientName: null,
  portraitStatus: null,
  portraitFile: null,
};

/**
 * 选中患者照片状态管理 Slice
 * 
 * 功能：
 * 1. 监听 workSelectionSlice 和 historySelectionSlice 的选中变化
 * 2. 自动更新选中患者的照片信息
 * 3. 提供清除选中状态的 action
 */
const selectedPatientSlice = createSlice({
  name: 'selectedPatient',
  initialState,
  reducers: {
    /**
     * 手动更新选中患者信息
     */
    updateSelectedPatient: (
      state,
      action: PayloadAction<{
        patientId: string;
        patientName: string;
        portraitStatus?: string;
        portraitFile?: string;
      }>
    ) => {
      state.patientId = action.payload.patientId;
      state.patientName = action.payload.patientName;
      state.portraitStatus = action.payload.portraitStatus || null;
      state.portraitFile = action.payload.portraitFile || null;
    },
    /**
     * 清除选中患者信息
     */
    clearSelectedPatient: (state) => {
      state.patientId = null;
      state.patientName = null;
      state.portraitStatus = null;
      state.portraitFile = null;
    },
  },
  extraReducers: (builder) => {
    // 监听 worklist 选中变化
    builder.addCase(
      workSelectionSlice.actions.setSelectedIds,
      (state, action: PayloadAction<string[]>) => {
        const selectedIds = action.payload;
        
        if (selectedIds.length === 0) {
          // 如果没有选中项，清空状态
          state.patientId = null;
          state.patientName = null;
          state.portraitStatus = null;
          state.portraitFile = null;
        } else {
          // 选中了项目，但我们需要从 store 中获取完整的 Task 数据
          // 这里只保存 patientId，实际的照片信息会在组件中从 workEntities 中获取
          state.patientId = selectedIds[0]; // 只处理单选
          // 其他字段会在组件中从 entities 获取
        }
      }
    );

    // 监听 historylist 选中变化
    builder.addCase(
      historySelectionSlice.actions.setSelectedIds,
      (state, action: PayloadAction<string[]>) => {
        const selectedIds = action.payload;
        
        if (selectedIds.length === 0) {
          // 如果没有选中项，清空状态
          state.patientId = null;
          state.patientName = null;
          state.portraitStatus = null;
          state.portraitFile = null;
        } else {
          // 选中了项目
          state.patientId = selectedIds[0]; // 只处理单选
          // 其他字段会在组件中从 entities 获取
        }
      }
    );
  },
});

export const { updateSelectedPatient, clearSelectedPatient } = selectedPatientSlice.actions;

// Selectors
export const selectSelectedPatient = (state: RootState) => state.selectedPatient;
export const selectPatientId = (state: RootState) => state.selectedPatient.patientId;
export const selectPortraitInfo = (state: RootState) => ({
  portraitStatus: state.selectedPatient.portraitStatus,
  portraitFile: state.selectedPatient.portraitFile,
});

export default selectedPatientSlice.reducer;