<template>
    <div>

      <!-- LOADER -->
      <div class="loader" v-if="showLoader">
        <v-progress-circular indeterminate color="white"></v-progress-circular>
      </div>
  
      <!-- SNACKBAR -->
      <v-snackbar
        :timeout="timeout"
        :top="y === 'top'"
        :right="x === 'right'"
        :vertical="mode === 'vertical'"
        v-model="snackbar"
        :color="snackbarColor"
      >
        {{ text }}
        <v-spacer></v-spacer>
        <v-btn flat text @click="snackbar = false">X</v-btn>
      </v-snackbar>

      <v-container class="pt-0">

        <v-layout row wrap class="mt-1">
          <v-flex xs12 md8>

            <div
              class="title side-bar-color font-weight-bold"

            >Welcome to the {{courseDetails[0].courseId.courseName}} Course for {{courseDetails[0].classId.classNum}} class</div>

            <v-flex xs12 class="subheading mt-2">
              Lorem Ipsum sdjjkhsdf sdklfjs dkfjskdjfk fjsdklf sdjfksljf sdfkls fljlkj kl
              jkhjkfhjksd sdfjkhsdjk fsdjkl sfkljkl ldkfjkl kjlfs dlkjlskd fljsldk fklj
              lksjdfljklsdj flkjs dflkjsd flkjsd lfkjsd lfjsdjf lkj kl
            </v-flex>

            <div class="mt-5">

              <v-btn

                @click="$router.push({name: 'Announcement', query:{courseId: $route.query.courseId}})"

                flat
                class="grey--text lighten-1"

              >

                <v-icon>volume_up</v-icon>
                <span>Announcement</span>
              </v-btn>

            </div>
            <div>

              <v-btn

                @click="$router.push({name: 'Course Discussion Forum', query:{courseId: $route.query.courseId}})"

                class="grey--text lighten-1"

                flat

              >

                <v-icon>forum</v-icon>

                <span class="ml-2">Course discussion forum</span>

              </v-btn>

            </div>
            <!-- CHAPTERS -->
            <v-layout column class="mt-5">
              <v-flex
                v-for="(chapter,index) in courseDetails[0].chapters"
                :key="index"
                style="cursor: pointer;"
                @click="routeToChapterInfo(chapter._id)"
              >
                <v-card class="mt-2 elevation-0 card-border">
                  <v-container class="pt-0">
                    <div class="title side-bar-color font-weight-bold">{{chapter.chapterName}}</div>
                    <div class="grey--text lighten-1 subheading">{{chapter.description}}</div>
                    <div
                      v-for="(point,index) in chapter.chapterPoints"
                      :key="index"
                      class="ml-2 mt-2"
                    >
                      <span class="grey--text lighten-1 subheading">{{index +1}}. {{point}}</span>
                    </div>
                  </v-container>
                </v-card>
              </v-flex>
            </v-layout>
          </v-flex>
          <v-spacer></v-spacer>

          <!-- COURSES -->

          <v-flex xs12 md3>

            <v-card class="elevation-0 card-border" height="100%">
              <v-container class="pt-0">
                <div class="side-bar-color font-weight-bold title">Courses</div>
  
                <div v-for="(course,index) in courseData">

                  <v-btn
                    flat
                    class="subheading text-xs-start justify-left"
                    style="cursor: pointer;"
                    block
                    @click="routeToCourseDetails(course._id)"
                  >
                    <div style="width: 100%;text-align: left;">
                      <v-icon style="color: red;padding-bottom: 3px;" size="15">play_arrow</v-icon>

                      {{course.courseName}}

                    </div>
                  </v-btn>

                </div>
                <!-- <v-expansion-panel focusable class="elevation-0">
                  <v-expansion-panel-content v-for="(item,i) in courseData" :key="i">
                    <template v-slot:header>

                      <div class="subheading">{{item.courseName}}</div>

                    </template>
                  </v-expansion-panel-content>
                </v-expansion-panel>-->
              </v-container>
            </v-card>
          </v-flex>
        </v-layout>
      </v-container>

    </div>
  </template>
  <script>

  import AllApiCalls from "@/Services/AllApiCalls.js";

  import http from "@/Services/http.js";
  import moment from "moment";
  export default {

    mixins: [AllApiCalls],

    data() {
      return {
        showLoader: false,
        courseDetails: [{ courseId: {}, classId: {} }],
        chapterIds: [],

        // courseData: [],

        courseDataTree: []
      };
    },
    methods: {

      routeToChapterInfo(selectedChapterId) {

        /* set value of present chapter selected, and other chapters ids in the obj */
        let obj = {};
        for (var i = 0; i < this.courseDetails[0].chapters.length; i++) {
          obj[
            this.courseDetails[0].chapters[i].chapterName
          ] = this.courseDetails[0].chapters[i]._id;
        }

        obj.selectedChapterId = selectedChapterId;

        obj.courseDetailId = this.courseDetails[0]._id;

        obj.courseId = this.$route.query.courseId;

        this.$router.push({
          name: "Chapter Info",
          query: obj
        });

      },
      async routeToCourseDetails(courseId) {
        /* getParticularCourseDetail- To get courseDetail - defined in GetApis.js*/
        let response = await this.getParticularCourseDetail(courseId);
  
        /* If the response is null then dont route */
        if (response.data.data.length > 0) {

          // REQUIRED TO WAIT FOR UPDATE CYCLE
          this.$nextTick(() => {
            // this.filters.locEmitted = "emitted";
            this.$router.push({ query: { courseId: courseId } });

          });
        } else {
          this.seeSnackbar("No Data Available", "warning");
        }

      }
    },

    async created() {

      console.log("its working");

      /* getParticularCourseDetail- To get courseDetail - defined in GetApis.js*/
      let response = await this.getParticularCourseDetail(
        this.$route.query.courseId
      );
      this.courseDetails = response.data.data;

      console.log("its working courseDetails - ", this.courseDetails);

      /* getStudentCourses - to get courseData - defined in GetApis.js*/
      await this.getStudentCourses({
        classId: localStorage.getItem("parentClassId"),
        studentId: localStorage.getItem("parentStudentId")
      });

    }
  };
  </script>
  <style scoped>
  .side-bar-color {
    color: #827bfa !important;
    /* border-top-right-radius: 74px !important; */
  }
  .card-border {
    border: 1px #bdbdbd solid;
    border-radius: 3px;
  }
  /* .v-treeview-node__toggle {
    color: red !important;
  } */
  </style>