import { ref, computed, inject } from 'vue';
import { GetTaskTeachingTypeList, GetTaskModeList, GetTeacherListByCourseID, GetCourseStudentList } from '@/api/select';
import { GetTreeNodeInfo_BookChapterStruct, GetTaskInfo, GetCSItem } from '@/api/course';
import { useRoute } from 'vue-router/composables';
import { Message } from 'element-ui';
import { fileUpload } from '@/api/app';
import { fileTypeSizeLimit } from '@/utils/validate';

import i18n from '@/locales/i18n';

const allStudent = {
  student_id: '',
  student_name: i18n.t('Key110')
};

export function useInit(form, student_list, custom_student_list, { liveForm, basicForm, courseForm }) {
  const route = useRoute();
  const { params, query } = route;
  const task_id = query.task_id;
  const is_template = 'is_template' in query ? JSON.parse(query.is_template) : false;
  const id = params.id;
  const cs_item_id = params.curItemID;

  const time_type = ref(params.time_type);
  let cs_item_begin_time = ref('');
  let cs_item_end_time = ref('');
  // 处理任务信息
  function handleTaskInfo({
    begin_time,
    end_time,
    time_type: tType,
    teaching_type,
    name,
    teacher_id,
    teacher_name,
    content,
    courseware_list,
    accessory_list,
    task_mode,
    is_enable_homework,
    is_enable_message,
    courseware_visible_mode,
    zhibo_record_mode,
    cs_item_begin_time: csItemBTime,
    cs_item_end_time: csItemETime,
    is_custom_student,
    custom_student_list: cusStudentList
  }) {
    if (begin_time.length > 0) {
      const begin = begin_time.split(' ');
      form.value.begin_date = begin[0];
      const bTime = begin[1].split(':');
      form.value.begin_date_hour = bTime[0];
      form.value.begin_date_minute = bTime[1];
    }
    if (end_time.length > 0) {
      const end = end_time.split(' ');
      form.value.end_date = end[0];
      const eTime = end[1].split(':');
      form.value.end_date_hour = eTime[0];
      form.value.end_date_minute = eTime[1];
    }

    cs_item_begin_time.value = csItemBTime;
    cs_item_end_time.value = csItemETime;
    time_type.value = tType;
    form.value.teaching_type = teaching_type;
    form.value.name = name;
    form.value.teacher_id = teacher_id;
    form.value.teacher_name = teacher_name;
    form.value.content = content;
    if (teaching_type === 10) {
      liveForm.value.coursewareInfo = courseware_list;
      liveForm.value.file_info_list = accessory_list;
      liveForm.value.courseware_visible_mode = courseware_visible_mode;
      liveForm.value.zhibo_record_mode = zhibo_record_mode;
    }

    if (teaching_type === 11) {
      courseForm.value.coursewareInfo = courseware_list;
      courseForm.value.file_info_list = accessory_list;
      courseForm.value.task_mode = task_mode;
    }

    if (teaching_type === 12) {
      basicForm.value.file_info_list = accessory_list;
      basicForm.value.is_enable_homework = is_enable_homework === 'true';
      basicForm.value.is_enable_message = is_enable_message === 'true';
    }

    if (is_custom_student === 'true') custom_student_list.value = cusStudentList;
  }

  let teacher_list = ref([]); // 课节教师列表
  // 初始化时需要同步的请求
  let initRequest = computed(() => {
    let list = [];
    let dataList = [];
    if (task_id) {
      list.push(GetTaskInfo({ id: task_id }));
      dataList.push('taskInfo');
    }
    if (!is_template) {
      list.push(GetTeacherListByCourseID({ course_id: id }));
      list.push(GetCourseStudentList({ course_id: id, audit_status_list: [1], pay_status: 1 }));
      dataList.push('teacher_list', 'student_list');
    }
    return { promiseList: list, dataList };
  });
  Promise.all(initRequest.value.promiseList).then((values) => {
    initRequest.value.dataList.forEach((item, i) => {
      if (item === 'taskInfo') return handleTaskInfo(values[i]);
      if (item === 'teacher_list') return (teacher_list.value = values[i].teacher_list);
      if (item === 'student_list') return (student_list.value = values[i].student_list);
    });

    if (form.value.teacher_id.length > 0) {
      // 如果课程删除了任务中的老师，任务中的老师需要添加进教师列表
      let isHas = teacher_list.value.some(({ teacher_id }) => {
        if (teacher_id === form.value.teacher_id) return true;
      });
      if (!isHas) {
        teacher_list.value.push({ teacher_id: form.value.teacher_id, teacher_name: form.value.teacher_name });
      }
    }

    if (student_list.value.length > 0 && custom_student_list.value.length <= 0) {
      custom_student_list.value.push(allStudent);
    }
  });

  let type_list = ref([]);
  GetTaskTeachingTypeList().then(({ type_list: list }) => {
    type_list.value = list;
  });

  let mode_list = ref([]);
  GetTaskModeList().then(({ mode_list: list }) => {
    mode_list.value = list;
  });

  GetCSItem({ id: cs_item_id }).then(({ begin_time, end_time }) => {
    cs_item_begin_time.value = begin_time;
    cs_item_end_time.value = end_time;
  });

  let hourArr = ref([]);
  let minuteArr = ref([]);
  for (let i = 0; i < 60; i++) {
    let item = String(i);
    if (i < 10) item = `0${item}`;
    if (i < 24) hourArr.value.push(item);
    minuteArr.value.push(item);
  }

  return {
    cs_item_begin_time,
    cs_item_end_time,
    time_type,
    teacher_list,
    type_list,
    mode_list,
    hourArr,
    minuteArr
  };
}

/**
 * 表单及操作
 */
export function useForm(liveForm, courseForm, basicForm) {
  const $t = inject('$t');
  const route = useRoute();
  const { query } = route;
  const is_template = 'is_template' in query ? JSON.parse(query.is_template) : false;

  let form = ref({
    name: '',
    teacher_id: '',
    teacher_name: '',
    begin_date: '',
    begin_date_hour: '00',
    begin_date_minute: '00',
    end_date: '',
    end_date_hour: '00',
    end_date_minute: '00',
    teaching_type: 12,
    content: ''
  });

  const validateTeacher = (rule, value, callback) => {
    if (form.value.teaching_type === 10 && !value && !is_template) {
      callback(new Error($t('Key382')));
    } else {
      callback();
    }
  };
  const validateNmae = (rule, value, callback) => {
    if (value.length <= 0) {
      callback(new Error($t('Key384')));
    } else {
      callback();
    }
  };
  let rules = ref({
    name: { trigger: 'blur', validator: validateNmae },
    teacher_id: { trigger: 'blur', validator: validateTeacher }
  });

  function upload(file) {
    if (fileTypeSizeLimit(file.file.name, file.file.size)) {
      return Message.warning(`${file.file.name}文件大小超出限制`);
    }

    fileUpload('Open', file).then(({ file_info_list }) => {
      const type = form.value.teaching_type;
      if (type === 10) {
        liveForm.value.file_info_list = liveForm.value.file_info_list.concat(file_info_list);
        return;
      }
      if (type === 11) {
        courseForm.value.file_info_list = courseForm.value.file_info_list.concat(file_info_list);
      }
      if (type === 12) {
        basicForm.value.file_info_list = basicForm.value.file_info_list.concat(file_info_list);
      }
    });
  }

  function closeFile(i, arr) {
    arr.splice(i, 1);
  }

  let student_list = ref([]); // 课节学生列表
  let custom_student_list = ref([]); // 自定义学生列表
  function selectStudent(i) {
    if (student_list.value.length <= 0) return;
    if (typeof i === 'string') {
      custom_student_list.value = [allStudent];
      return;
    }
    const list = custom_student_list.value;
    const index = list.findIndex(({ student_id }) => student_id === student_list.value[i].student_id);
    if (index === -1) {
      list.push(student_list.value[i]);
      // 如果自定义学生列表中有【全部】，删除【全部】
      list.some(({ student_id }) => student_id === allStudent.student_id) &&
        list.splice(
          list.findIndex(({ student_id }) => student_id === allStudent.student_id),
          1
        );
    } else {
      list.splice(index, 1);
      list.length <= 0 && custom_student_list.value.push(allStudent);
    }
  }

  function deleteStudentItem(id) {
    if (id.length <= 0) return;
    custom_student_list.value.splice(
      custom_student_list.value.findIndex(({ student_id }) => student_id === id),
      1
    );
    if (custom_student_list.value.length <= 0 && student_list.value.length > 0) {
      custom_student_list.value.push(allStudent);
    }
  }

  return { form, rules, upload, closeFile, student_list, custom_student_list, selectStudent, deleteStudentItem };
}

/**
 * 选择课件
 * @param {Object} form
 */
export function useCourse(form, liveForm, courseForm) {
  const $t = inject('$t');

  let dialogVisible = ref(false);

  function dialogClose() {
    dialogVisible.value = false;
  }

  /**
   * 选择课件
   * @param {String} course_id 课件id
   * @param {String} previewGroupId 预览分组id
   */
  function selectCourse(course_id, previewGroupId) {
    if (course_id.length === 0) {
      Message.warning($t('Key385'));
      return;
    }
    dialogVisible.value = false;

    let _form = form.value.teaching_type === 10 ? liveForm : courseForm;
    if (_form.value.coursewareInfo.some(({ courseware_id }) => courseware_id === course_id)) return;
    GetTreeNodeInfo_BookChapterStruct({ id: course_id }).then(({ name, id }) => {
      _form.value.coursewareInfo.push({
        courseware_id: id,
        courseware_name: name,
        group_id_selected_info: previewGroupId
      });
    });
  }

  /**
   * 修改课件名称
   * @param {Number} i
   * @param {String} type
   * @param {String} name
   */
  function changeCourseName(i, type, name) {
    (type === 'live' ? liveForm.value : courseForm.value).coursewareInfo[i].courseware_name = name;
    (type === 'live' ? liveForm.value : courseForm.value).coursewareInfo[i].is_custom_name = 'true';
  }

  /**
   * 删除课件
   * @param {Number} i
   * @param {String} type
   */
  function closeCourse(i, type) {
    (type === 'live' ? liveForm.value : courseForm.value).coursewareInfo.splice(i, 1);
  }

  return {
    dialogVisible,
    changeCourseName,
    dialogClose,
    selectCourse,
    closeCourse
  };
}