import { Middleware, PayloadAction } from '@reduxjs/toolkit';
import prepare, { unprepare } from '../domain/exam/prepare';
import { BusinessFlowState, setBusinessFlow } from './BusinessFlowSlice';
import { setFeedbackOpen } from './exam/largeScreenSlice';

let continueBusinessFlow = '';

const businessFlowMiddlewareLogic: Middleware =
  (store) => (next) => (action: PayloadAction<string>) => {
    //const result = next(action);
    // console.log(
    //   `[businessFlowMiddleware] Action dispatched: ${action.type} ${action.payload}`
    // );
    if (action.type !== setBusinessFlow.type) {
      return next(action); // Only handle setBusinessFlow actions
    }
    const state = store.getState().BusinessFlow as BusinessFlowState;
    const currentKey = state.currentKey;
    console.log(`[businessFlowMiddleware] currentKey: ${currentKey}`);
    console.log(
      `[businessFlowMiddleware] Current business flow is now: ${state.currentKey} ; Last key was: ${state.lastKey}`
    );
    //进入检查
    if (currentKey === 'exam') {
      prepare();
    }
    if (isFromExamToView(action.payload, currentKey)) {
      //从检查进入图像处理，有可能是曝光导致的，怎么知道呢？看发生器状态
      if (store.getState().generatorMonitor.acquisitionState === 1) {
        //发生器正在采集
        console.log(
          `[businessFlowMiddleware] Exiting exam flow, but generator is still acquiring.`
        );
        return next(action); // 发生器正在采集，不能退出
      } else {
        //非曝光导致的从检查进入处理      // 说明从检查退出 , 执行清理
        console.log(
          `[businessFlowMiddleware] Exiting exam flow, last key was: ${state.lastKey}`
        );
        unprepare();
      }
    }
    if (
      isExitingExam(action.payload, currentKey) &&
      action.payload !== 'exitExamCompleted' &&
      action.payload !== 'exitExamSuspended'
    ) {
      console.log(
        `[businessFlowMiddleware] Exiting exam flow to go to : ${action.payload}`
      );
      const exposureStatus = store.getState().bodyPositionList.exposureStatus;
      console.log(
        `[businessFlowMiddleware] Exposure status: ${exposureStatus}`
      );
      if (exposureStatus === 'Half Exposed') {
        store.dispatch(setFeedbackOpen(true)); //显示反馈框
        // store.dispatch({ type: 'SET_CONTINUE_BUSINESS_FLOW', payload: currentKey });
        continueBusinessFlow = action.payload; // 保存退出检查时，要去哪个业务流程
        return; //阻止退出exam
      } else if (exposureStatus === 'Fully Exposed') {
        // Notify backend
        console.log(
          '[businessFlowMiddleware] Fully Exposed, notifying backend'
        );
        // Proceed with the action
        return next(action);
      } else if (exposureStatus === 'Not Exposed') {
        // Proceed with the action
        return next(action);
      }
    }
    //退出检查的中间过程
    if (action.payload === 'exitExamCompleted') {
      // Notify backend with different interfaces for completed and suspended
      console.log(
        `[businessFlowMiddleware] Notifying backend for ${action.payload}`
      );
      // todo 把所有未曝光的体位从study删除掉--服务端和slice。
      return next({ ...action, payload: continueBusinessFlow });
    }
    if (action.payload === 'exitExamSuspended') {
      // Notify backend with different interfaces for completed and suspended 暂时不通知后端
      console.log(
        `[businessFlowMiddleware] Notifying backend for ${action.payload}`
      );
      return next({ ...action, payload: continueBusinessFlow });
    }
    next(action);
  };
/**
 * 从检查到图像处理
 */
function isFromExamToView(currentAction: string, currentKey: string): boolean {
  return currentAction === 'view' && currentKey === 'exam';
}
function isExitingExam(currentAction: string, currentKey: string): boolean {
  console.log(
    `[businessFlowMiddleware] Checking if exiting exam: ${currentAction} vs ${currentKey}`
  );
  return currentAction !== 'exam' && currentKey === 'exam';
}

export default businessFlowMiddlewareLogic;