import { Component, OnInit } from '@angular/core';
import {SearchEmployee} from '../../_models/Employee/searchEmployee';
import {LeaveYear} from '../../_models/Leave/leaveYear';
import {Leave} from '../../_models/Leave/leave';
import {LeaveService} from '../../_services/leave/leave.service';
import {HRMNotificationService} from '../../app.notification.service';
import {loadingPanelService} from '../../hrm-loding panel/loding.panel.service';
import {ApiService} from '../../app.api.service';
import {EnumStatus} from '../../_models/enums';
import {saveAs} from 'file-saver';
import {ReportServices} from '../../_services/reports/report.service';

@Component({
  selector: 'app-emp-leave-balance',
  templateUrl: './emp-leave-balance.component.html',
  styleUrls: ['./emp-leave-balance.component.scss']
})
export class EmpLeaveBalanceComponent implements OnInit {
    selectedEmployee: SearchEmployee;
    leaveYearList: LeaveYear[] = [];
    leaveList: Leave[] = [];
    leaveYearId: number;
    PDFTitle = 'Employee Leave Balance';
    showPopUp = false;
    data: Array<Object>;
    src: any;
    base64Data: any;
    leaveId: number;


    constructor(public leaveService: LeaveService,
                public notificationService: HRMNotificationService,
                public reportService: ReportServices,
                public loadingPanel: loadingPanelService,
                public apiService: ApiService) {
        this.apiService.selectedMenuName = 'Employee Leave Balance';
    }

    ngOnInit(): void {
        this.loadLeaveYear();
    }

    public GetSelectedEmployee(childData) {
        this.selectedEmployee = childData;
    }

    loadLeaveYear() {
        this.leaveService.getAllLeaveYear().subscribe(
            (resp) => {
                this.leaveYearList = resp;
            },
            (err) => {
                console.log(err);
            },
            () => {
                console.log(this.leaveYearList);
            }
        );
        this.leaveService.getAllLeave(EnumStatus.Active, '', '').subscribe(
            (resp) => {
                this.leaveList = resp;
            },
            (err) => {
                console.log(err);
            },
            () => {
                console.log(this.leaveList);
                /*this.leaveList.forEach(x => {
                    x.code = x.code.toLowerCase() + x.id;
                });*/
            },
        );
    }

    preview() {
        const leave = this.leaveYearList.find(l => l.id === this.leaveYearId);
        if (leave === null) {
            this.notificationService.showError('Please select leave year!');
            return;
        }
        const data = {
            reportid: 97,
            itemid: this.leaveId,
            bankId: null,
            empIds: this.selectedEmployee.employeeID.toString(),
            reportType: 'PDF',
            fromDate: leave.startDate,
            toDate: leave.endDate
        };

        this.loadingPanel.ShowLoadingPanel = true;
        this.reportService.getCommonReportData(data).subscribe(
            (resp: any) => {
                if (data.reportType === 'PDF') {
                    this.src = URL.createObjectURL(this.b64toBlob(resp, 'data:application/pdf;base64', 1024));
                    this.showPopUp = true;
                } else if (data.reportType === 'EXCEL') {
                    this.downloadFile(resp);
                }
            },
            (err) => {
                console.log(err);
                this.notificationService.showError(err.error);
                this.loadingPanel.ShowLoadingPanel = false;
            },
            () => {

                this.loadingPanel.ShowLoadingPanel = false;
                // this.loadGrid();
            }
        );
    }

    downloadFile(blobContent) {
        const blob = new Blob([this.b64toBlob(blobContent, 'application/data:application/vnd.ms-excel', 1024)], {});
        saveAs(blob, this.PDFTitle + '.xls');
    }

    b64toBlob(b64Data, contentType, sliceSize) {
        const byteCharacters = atob(b64Data);
        const byteArrays = [];

        for (let offset = 0; offset < byteCharacters.length; offset += sliceSize) {
            const slice = byteCharacters.slice(offset, offset + sliceSize);

            const byteNumbers = new Array(slice.length);
            for (let i = 0; i < slice.length; i++) {
                byteNumbers[i] = slice.charCodeAt(i);
            }

            const byteArray = new Uint8Array(byteNumbers);
            byteArrays.push(byteArray);
        }

        const blob = new Blob(byteArrays, {type: contentType});
        return blob;
    }

    closeForm(): void {
        this.showPopUp = false;
    }
}