import request from "@/utils/request";
import { getDemoAnswerKey, getStudentDemoSession, isStudentDemo } from "@/utils/studentDemo";

function demoResult(taskKey) {
  try { return JSON.parse(sessionStorage.getItem(getDemoAnswerKey(taskKey)) || "null"); } catch (error) { return null; }
}

export function getStudentTrainingAnswer(taskKey, params) {
  if (isStudentDemo()) return Promise.resolve({ code: 200, data: demoResult(taskKey) });
  return request({
    url: `/api/student-training-answers/${taskKey}`,
    method: "get",
    params,
  });
}

export function saveStudentTrainingAnswer(taskKey, data) {
  if (isStudentDemo()) {
    const answer = { ...data, teachingClassId: getStudentDemoSession()?.userInfo?.demoTeachingClassId };
    sessionStorage.setItem(getDemoAnswerKey(taskKey), JSON.stringify(answer));
    return Promise.resolve({ code: 200, data: answer });
  }
  return request({
    url: `/api/student-training-answers/${taskKey}`,
    method: "post",
    data,
    headers: { repeatSubmit: false },
  });
}

export function deleteStudentTrainingAnswer(taskKey, params) {
  if (isStudentDemo()) { sessionStorage.removeItem(getDemoAnswerKey(taskKey)); return Promise.resolve({ code: 200 }); }
  return request({
    url: `/api/student-training-answers/${taskKey}`,
    method: "delete",
    params,
  });
}

export function uploadStudentTrainingFile(data) {
  if (isStudentDemo()) return Promise.reject(new Error("演示模式不上传文件"));
  return request({
    url: "/common/upload",
    method: "post",
    data,
    headers: {
      "Content-Type": "multipart/form-data",
      repeatSubmit: false,
    },
  });
}