<template>

    <v-container fluid grid-list-md class="body-color">

      <div v-show="hideData">
        <v-layout row>

          <v-btn @click="exportPdf" round class="right open-dialog-button" dark>

            Export Pdf

            <v-icon dark right size="20">save_alt</v-icon>
          </v-btn>

          <v-dialog v-model="dialogExport" max-width="500px" persistent>

            <v-btn round slot="activator" class="right open-dialog-button" dark>

              Export csv
              <v-icon dark right size="20">save_alt</v-icon>
            </v-btn>

            <v-card flat class="card-style pa-2" dark>
              <v-layout>
                <v-flex xs12>
                  <label class="title text-xs-center">Export</label>
                  <v-icon size="24" class="right" @click="dialogExport = false">cancel</v-icon>
                </v-flex>
              </v-layout>

              <v-card-text>
                <v-container grid-list-md>
                  <v-layout wrap>
                    <v-flex xs12>
                      <v-menu
                        ref="menuStartDate"
                        :close-on-content-click="false"
                        v-model="menuStartDate"
                        :nudge-right="40"
                        :return-value.sync="startDate"
                        lazy
                        transition="scale-transition"
                        offset-y
                        full-width
                        min-width="290px"
                      >
                        <v-text-field
                          slot="activator"
                          v-model="startDate"
                          label="Select Start Date"
                          prepend-icon="event"
                          readonly
                        ></v-text-field>
                        <v-date-picker
                          v-model="startDate"
                          @input="$refs.menuStartDate.save(startDate)"
                        ></v-date-picker>
                      </v-menu>
                    </v-flex>
                    <v-flex xs12>
                      <v-menu
                        ref="menuEndDate"
                        :close-on-content-click="false"
                        v-model="menuEndDate"
                        :nudge-right="40"
                        :return-value.sync="endDate"
                        lazy
                        transition="scale-transition"
                        offset-y
                        full-width
                        min-width="290px"

                      >

                        <v-text-field
                          slot="activator"
                          v-model="endDate"
                          label="Select End Date"
                          prepend-icon="event"
                          readonly
                        ></v-text-field>
                        <v-date-picker v-model="endDate" @input="$refs.menuEndDate.save(endDate)"></v-date-picker>
                      </v-menu>
                    </v-flex>

                    <v-flex xs12>
                      <v-card-actions>
                        <v-spacer></v-spacer>

  
                        <v-btn class="add-button" round @click="exportData">Export</v-btn>

                      </v-card-actions>
                    </v-flex>

                  </v-layout>
                </v-container>
              </v-card-text>

            </v-card>
          </v-dialog>
        </v-layout>
        <v-layout wrap>
          <v-flex xs12 sm12 md4>
            <v-card flat>

              <!-- <v-layout>
                <v-flex xs12>
                  <label class="title  card-style text-xs-center">Profile</label>
                </v-flex>
              </v-layout>-->
              <h3 class="py-2 text-xs-center card-style white--text">Profile</h3>

              <v-card-text>
                <v-container>
                  <v-layout wrap>
                    <v-flex xs12>
                      <v-layout>
                        <v-flex
                          xs12
                          class="text-xs-center text-sm-center text-md-center text-lg-center"
                        >

                          <v-avatar size="80px">

                            <img src="/static/icon/user.png" v-if="!studentData.profilePicUrl" />
                            <img
                              :src="studentData.profilePicUrl"
                              v-else-if="studentData.profilePicUrl"
                            />
                          </v-avatar>
                        </v-flex>
                      </v-layout>
                      <v-layout>
                        <v-flex xs12 sm12>
                          <h3 class="text-xs-center">
                            <b>{{ studentData.name }}</b>
                          </h3>
                          <p class="text-xs-center grey--text">Student</p>
                        </v-flex>
                      </v-layout>
                      <v-layout style="border: 1px solid lightgrey;">
                        <v-flex xs6 sm6 class="pa-0">
                          <h4 class="right">
                            <b>Roll No :</b>
                          </h4>
                        </v-flex>
                        <v-flex sm6 xs6 class="pa-0">
                          <h4>{{ studentData.rollNo }}</h4>
                        </v-flex>
                      </v-layout>
                      <v-layout style="border: 1px solid lightgrey;">
                        <v-flex xs6 sm6 class="pa-0">
                          <h4 class="right">
                            <b>Class :</b>
                          </h4>
                        </v-flex>
                        <v-flex sm6 xs6 class="right pa-0">
                          <h4>{{ studentData.classId.classNum }}</h4>
                        </v-flex>
                      </v-layout>
                      <v-layout style="border: 1px solid lightgrey;">
                        <v-flex xs6 sm6 class="right pa-0">
                          <h4 class="right">
                            <b>Section :</b>
                          </h4>
                        </v-flex>
                        <v-flex sm6 xs6 class="right pa-0">
                          <h4>{{ studentData.sectionId.name}}</h4>
                        </v-flex>
                      </v-layout>
                    </v-flex>
                  </v-layout>
                </v-container>
              </v-card-text>
            </v-card>
          </v-flex>
          <v-flex xs12 sm12 md8>
            <v-card flat>

              <h3 class="py-2 text-xs-center card-style white--text">

                Attendence
                <span class="ml-4">
                  <v-avatar class="green caption" size="12"></v-avatar>
                  <span class="subheading">Present</span>
                </span>
                <span class="ml-4">
                  <v-avatar color="red caption" size="12" class></v-avatar>
                  <span class="subheading">Absent</span>
                </span>
              </h3>
              <YearCalendar
                v-model="year"
                :activeDates="activeDates"
                prefixClass="your_customized_wrapper_class"
                :activeClass="activeClass"
              ></YearCalendar>
            </v-card>
          </v-flex>
        </v-layout>
      </div>
      <v-layout v-show="showPdfData">
        <v-container>
          <v-flex xs12 sm12 md8 offset-sm2>

            <v-btn class="right add-button" @click="generatePDF2Canvas()" :loading="loadingPdf" dark>

              Download

              <v-icon dark right size="20">save_alt</v-icon>
            </v-btn>
          </v-flex>
        </v-container>

      </v-layout>

      <v-layout v-show="showPdfData">
        <v-container>
          <v-layout v-show="showPdfData">
            <v-flex xs12 sm12 md8 offset-sm2>
              <div ref="printMe">
                <v-flex xs12 class="pl-3">
                  <v-layout>
                    <v-flex xs6 sm2 class="pa-0 mb-1">
                      <h4>
                        <b>Name</b>
                      </h4>
                    </v-flex>
                    <v-flex sm10 xs6 class="pa-0">
                      <h4>: {{ studentData.name }}</h4>
                    </v-flex>
                  </v-layout>
                  <v-layout>
                    <v-flex xs6 sm2 class="pa-0 mb-1">
                      <h4>
                        <b>Type</b>
                      </h4>
                    </v-flex>
                    <v-flex sm10 xs6 class="pa-0 mb-1">
                      <h4>: Student</h4>
                    </v-flex>
                  </v-layout>
                  <v-layout>
                    <v-flex xs6 sm2 class="pa-0 mb-1">
                      <h4>
                        <b>Roll No</b>
                      </h4>
                    </v-flex>
                    <v-flex sm10 xs6 class="pa-0 mb-1">
                      <h4>: {{ studentData.rollNo }}</h4>
                    </v-flex>
                  </v-layout>
                  <v-layout>
                    <v-flex xs6 sm2 class="pa-0 mb-1">
                      <h4>
                        <b>Class</b>
                      </h4>
                    </v-flex>
                    <v-flex sm10 xs6 class="pa-0 mb-1">
                      <h4>: {{ studentData.classId.classNum }}</h4>
                    </v-flex>
                  </v-layout>
                  <v-layout>
                    <v-flex xs6 sm2 class="pa-0 mb-1">
                      <h4>
                        <b>Section</b>
                      </h4>
                    </v-flex>
                    <v-flex sm10 xs6 class="pa-0 mb-3">
                      <h4>: {{ studentData.sectionId.name}}</h4>
                    </v-flex>
                  </v-layout>
                </v-flex>
                <v-card flat>
                  <h3 class="py-2 text-xs-center grey lighten-1 white--text">
                    Attendence
                    <span class="ml-4">
                      <v-avatar class="green caption" size="12"></v-avatar>
                      <span class="subheading">Present</span>
                    </span>
                    <span class="ml-4">
                      <v-avatar color="red caption" size="12" class></v-avatar>
                      <span class="subheading">Absent</span>
                    </span>
                  </h3>
                  <YearCalendar
                    v-model="year"
                    :activeDates="activeDates"
                    prefixClass="your_customized_wrapper_class"
                    :activeClass="activeClass"
                  ></YearCalendar>
                </v-card>
              </div>
            </v-flex>
          </v-layout>
        </v-container>
      </v-layout>

      <img :src="output" v-show="false" />

      <div class="loader" v-if="showLoader">
        <v-progress-circular indeterminate color="white"></v-progress-circular>
      </div>

    </v-container>
  </template>

  <script lang="js">

  import moment from "moment";
  import http from "@/Services/http.js";
  import YearCalendar from "vue-material-year-calendar";

  import jsPDF from 'jspdf';
      // eslint-disable-next-line
  import autoTable from 'jspdf-autotable';

  
  export default {
    components: { YearCalendar },
    data() {
      return {

        showPdfData:false,
        hideData:true,
        loadingPdf:false,
        output:null,

        studentsList: [],

        json_data: [],
        dialogExport: false,
        startDate: "",
        endDate: "",
        menuEndDate: false,
        menuStartDate: false,
        showLoader: false,

        token: "",
        year: new Date().getFullYear(),
        activeDates: [],
        activeClass: "",

        studentData: {
          classId: {
            classNum: ""
          },
          sectionId: {
            name: ""
          },
        },

      };
    },
    mounted() {
      this.token = this.$store.state.token;
      this.getStudentAttendence();
      this.getStudentData();
    },
    methods: {
      dates: function(date) {
        return moment(date).format("MMMM DD, YYYY");
      },
      getStudentAttendence() {

        this.showLoader = true;

        http()
          .get(
            "/studentAttendance",
            { params: { studentId: this.$route.params.id } },
            {
              headers: { Authorization: "Bearer " + this.token }
            }
          )
          .then(response => {

            this.showLoader = false;

            let array = [];
            for (let i = 0; i < response.data.data.length; i++) {
              if (response.data.data[i].students[0].isPresent == true) {
                array.push({
                  date: response.data.data[i].date,

                  className: "green"

                });
              } else if (response.data.data[i].students[0].isPresent == false) {
                array.push({
                  date: response.data.data[i].date,
                  className: "red"
                });
              }
            }
            this.activeDates = array;
          })

          .catch(error => {

            this.showLoader = false;
            if (error.response.status === 401) {
              this.$router.replace({ path: "/" });
              this.$store.dispatch("setToken", null);
              this.$store.dispatch("Id", null);

              this.$store.dispatch("Role", null);

            }

          });
      },
      getStudentData() {
        http()
          .get(
            "/getParticularStudentDetail",
            { params: { studentId: this.$route.params.id } },
            {
              headers: { Authorization: "Bearer " + this.token }
            }
          )
          .then(response => {
            this.studentData = response.data.data;
          })
          .catch(err => {
            console.log("err====>", err);
            // this.$router.replace({ path: '/' });
          });

      },

      convertToCSV(objArray) {
      var array = typeof objArray != 'object' ? JSON.parse(objArray) : objArray;
      var str = '';
  
      for (var i = 0; i < array.length; i++) {
          var line = '';
          for (var index in array[i]) {
              if (line != '') line += ','
  
              line += array[i][index];
          }
  
          str += line + '\r
  ';
      }
  
      return str;
      },

      exportData() {
        http()
          .get(
            "/studentAttendanceByMonth",
            {
              params: {
                studentId: this.$route.params.id,
                startDate: this.startDate,
                endDate: this.endDate
              }
            },
            {
              headers: { Authorization: "Bearer " + this.token }
            }
          )
          .then(response => {
            this.json_data = response.data.data;

            this.dialogExport = false;

            console.log("hh",this.json_data)
             var jsonObject = JSON.stringify(this.json_data);
  
      var csv = this.convertToCSV(jsonObject);
  
      var exportedFilenmae = "studentAttendance" + '.csv';
      var blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
            if (navigator.msSaveBlob) { // IE 10+
          navigator.msSaveBlob(blob, exportedFilenmae);
      } else {
          var link = document.createElement("a");
          if (link.download !== undefined) { // feature detection
              // Browsers that support HTML5 download attribute
              var url = URL.createObjectURL(blob);
              link.setAttribute("href", url);
              link.setAttribute("download", exportedFilenmae);
              link.style.visibility = 'hidden';
              document.body.appendChild(link);
              link.click();
              document.body.removeChild(link);
          }
      }

          })
          .catch(err => {
            console.log("err====>", err);
            // this.$router.replace({ path: '/' });
          });

      },
      exportPdf(){
          this.hideData = false;
          this.showPdfData = true   
      },
       async  generatePDF2Canvas(){
              this.loadingPdf = true
              const el = this.$refs.printMe;
              // add option type to get the image version
              // if not provided the promise will return 
              // the canvas.
              const options = {
                  type: 'dataURL'
              }
              this.output = await this.$html2canvas(el, options);

              if(this.output) {
                 this.loadingPdf = false
              }
              let doc = new jsPDF();
              doc.addImage(this.output, 'JPEG', 5, 10, 200, 280);

              doc.save("Attendance.pdf");

          }

    }
  };
  </script>
  
  <style lang="stylus">
  .your_customized_wrapper_class {
    background-color: #0aa;
    color: white;
  
    &.red {
      background-color: red;
      color: white;
  
      &:after {
        background-size: 100% 100%;
      }
    }
  
    &.blue {
      background-color: #0000aa;
      color: white;
    }
  
    &.your_customized_classname {
      background-color: yellow;
      color: black;
    }
  }

  </style>
  <style  scoped>
  .add-button {
    background: #feb83c !important;
    border-color: #feb83c !important;
    text-transform: none !important;
    -webkit-box-shadow: none !important;
    box-shadow: none !important;
  }
  .card-style {
    background: #7f62f8 !important;
    border-color: #7f62f8 !important;
    border-radius: 12px;
  }
  .open-dialog-button {
    background: #827bfa !important;
    border-color: #827bfa !important;
    text-transform: none !important;
  }

  </style>