/*
  Copyright © 2016-2019 Lidor Systems. All rights reserved.

  This file is part of the "IntegralUI Web" Library. 
                                                                   
  The contents of this file are subject to the IntegralUI Web License, and may not be used except in compliance with the License.
  A copy of the License should have been installed in the product's root installation directory or it can be found at
  http://www.lidorsystems.com/products/web/studio/license-agreement.aspx.
                                                            
  This SOFTWARE is provided "AS IS", WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language 
  governing rights and limitations under the License. Any infringement will be prosecuted under applicable laws.                           
*/

import { Component, ViewContainerRef, ViewChild, ViewChildren, ViewEncapsulation } from '@angular/core';
import { IntegralUISortOrder } from '../../integralui/components/integralui.core';
import { IntegralUIGrid } from '../../integralui/components/integralui.grid';

@Component({
    selector: '',
    template: `
        <style>
            .grid-expcsv-normal
            {
                float: left;
                width: 675px;
                height: 300px;
            }
            .grid-expcsv-button
            {
                margin: 5px 0;
                padding: 3px;
                width: 125px;
            }
        </style>
        <h2 class="feature-title">Grid / Export to CSV or JSON</h2>
        <div class="feature-content" style="width:900px;">
            <div #application>
                <iui-grid [columns]="columns" [rows]="rows" [controlStyle]="gridStyle" [showFooter]="false" (columnClick)="onColumnClick($event)" #grid>
                    <ng-template let-column [iuiTemplate]="{ type: 'header' }">
                        {{column.headerText}}
                    </ng-template>
                    <ng-template let-cell [iuiTemplate]="{ type: 'cell' }">
                        {{cell.text}}
                    </ng-template>
                </iui-grid>
                <div class="control-panel">
                    <button class="grid-expcsv-button" (click)="exportCSV()">Export as CSV</button>
                    <button class="grid-expcsv-button" (click)="exportJSON()">Export as JSON</button>
                </div>
            </div>
            <br style="clear:both;"/>
            <div class="feature-help" style="width:800px;">
                <p><span class="initial-space"></span>This example presents how to export the Grid data to Excel CSV file or a JSON formatted string. When exporting to JSON, the final result is shown in console window.</p>
                <p><span class="initial-space"></span>To export data, the following methods are used:</p>
                <ul class="feature-points">
                    <li><span style="color:#c60d0d">exportToCSV()</span> - exports data to Excel CSV format</li>
                    <li><span style="color:#c60d0d">exportToJSON(columnFields, rowFields, spacing)</span> - exports data to a JSON formatted string</li>
                </ul>
                <p><span class="initial-space"></span>When exporting to a CSV file, only display values are exported for each column cell. On the other hand, when exporting to JSON, all or specified fields are exported.</p> 
                <p><span class="initial-space"></span>For more information check out the source code of this sample (<i>grid/grid-export.ts</i>) file.</p> 
            </div>
        </div>
    `,
    encapsulation: ViewEncapsulation.None
})
export class GridExportSample {
    @ViewChild('grid', { static: false }) grid: IntegralUIGrid;

    public columns: Array<any>;
    public rows: Array<any>;

    public gridStyle: any = {
        general: {
            normal: 'grid-expcsv-normal'
        }
    }

    private sorting: IntegralUISortOrder = IntegralUISortOrder.None;
    private sortColumn: any = null;
    private prevColumn: any = null;


    constructor(){
        this.columns = [
            { id: 2, headerText: "Country", width: 130 },
            { id: 3, headerText: "Population", headerAlignment: "center", contentAlignment: "right", width: 125 },
            { id: 4, headerText: "Date", headerAlignment: "center", contentAlignment: "center", width: 120 },
            { id: 6, headerText: "Land in km2", headerAlignment: "center", contentAlignment: "right", width: 110 },
            { id: 7, headerText: "Capital", headerAlignment: "center", width: 120 }
        ];

        this.rows = [
            { id: 11, pid: 1, text: "Egypt", cells: [{ cid: 2, text: "Egypt" }, { cid: 3, text: "88,311,000", value: 88311000 }, { cid: 4, text: "06 Apr 2015", value: new Date(2015, 3, 6) }, { cid: 6, text: "995,450", value: 995450 }, { cid: 7, text: "Cairo" }] },
            { id: 12, pid: 1, text: "Nigeria", cells: [{ cid: 2, text: "Nigeria" }, { cid: 3, text: "185,043,000", value: 185043000 }, { cid: 4, text: "01 Jul 2015", value: new Date(2015, 6, 1) }, { cid: 6, text: "910,768", value: 910768 }, { cid: 7, text: "Abuja" }] },
            { id: 13, pid: 1, text: "South Africa", cells: [{ cid: 2, text: "South Africa" }, { cid: 3, text: "54,002,000", value: 54002000 }, { cid: 4, text: "01 Jul 2014", value: new Date(2014, 6, 1) }, { cid: 6, text: "1,214,470", value: 1214470 }, { cid: 7, text: "Pretoria" }] },
            { id: 21, pid: 2, text: "China", cells: [{ cid: 2, text: "China" }, { cid: 3, text: "1,369,140,000", value: 1369140000 }, { cid: 4, text: "06 Apr 2015", value: new Date(2015, 3, 6) }, { cid: 6, text: "9,326,410", value: 9326410 }, { cid: 7, text: "Beijing" }] },
            { id: 22, pid: 2, text: "India", cells: [{ cid: 2, text: "India" }, { cid: 3, text: "1,269,545,000", value: 1269545000 }, { cid: 4, text: "01 Jul 2015", value: new Date(2015, 6, 1) }, { cid: 6, text: "2,864,021", value: 2864021 }, { cid: 7, text: "New Delhi" }] },
            { id: 23, pid: 2, text: "Japan", cells: [{ cid: 2, text: "Japan" }, { cid: 3, text: "126,910,000", value: 126910000 }, { cid: 4, text: "01 Mar 2015", value: new Date(2015, 2, 1) }, { cid: 6, text: "364,485", value: 364485 }, { cid: 7, text: "Tokyo" }] },
            { id: 24, pid: 2, text: "Saudi Arabia", cells: [{ cid: 2, text: "Saudi Arabia" }, { cid: 3, text: "31,521,418", value: 31521418 }, { cid: 4, text: "01 Jul 2015", value: new Date(2015, 6, 1) }, { cid: 6, text: "2,149,690", value: 2149690 }, { cid: 7, text: "Riyadh" }] },
            { id: 25, pid: 2, text: "South Korea", cells: [{ cid: 2, text: "South Korea" }, { cid: 3, text: "51,342,881", value: 51342881 }, { cid: 4, text: "01 Jan 2015", value: new Date(2015, 0, 1) }, { cid: 6, text: "100,032", value: 100032 }, { cid: 7, text: "Seoul" }] },
            { id: 31, pid: 3, text: "France", cells: [{ cid: 2, text: "France" }, { cid: 3, text: "66,109,000", value: 66109000 }, { cid: 4, text: "01 Mar 2015", value: new Date(2015, 2, 1) }, { cid: 6, text: "640,427", value: 640427 }, { cid: 7, text: "Paris" }] },
            { id: 32, pid: 3, text: "Germany", cells: [{ cid: 2, text: "Germany" }, { cid: 3, text: "80,925,000", value: 80925000 }, { cid: 4, text: "30 Jun 2014", value: new Date(2014, 5, 30) }, { cid: 6, text: "348,672", value: 348672 }, { cid: 7, text: "Berlin" }] },
            { id: 33, pid: 3, text: "Italy", cells: [{ cid: 2, text: "Italy" }, { cid: 3, text: "60,788,845", value: 60788845 }, { cid: 4, text: "30 Nov 2014", value: new Date(2014, 10, 30) }, { cid: 6, text: "294,140", value: 294140 }, { cid: 7, text: "Rome" }] },
            { id: 34, pid: 3, text: "Macedonia", cells: [{ cid: 2, text: "Macedonia" }, { cid: 3, text: "2,065,769", value: 2065769 }, { cid: 4, text: "31 Dec 2013", value: new Date(2013, 11, 31) }, { cid: 6, text: "25,433", value: 25433}, { cid: 7, text: "Skopje" }] },
            { id: 41, pid: 4, text: "Canada", cells: [{ cid: 2, text: "Canada" }, { cid: 3, text: "35,702,707", value: 35702707 }, { cid: 4, text: "01 Jan 2015", value: new Date(2015, 0, 1) }, { cid: 6, text: "9,093,507", value: 9093507 }, { cid: 7, text: "Ottawa" }] },
            { id: 42, pid: 4, text: "Mexico", cells: [{ cid: 2, text: "Mexico" }, { cid: 3, text: "121,005,815", value: 121005815 }, { cid: 4, text: "01 Jul 2015", value: new Date(2015, 6, 1) }, { cid: 6, text: "1,943,945", value: 1943945 }, { cid: 7, text: "Mexico City" }] },
            { id: 43, pid: 4, text: "USA", cells: [{ cid: 2, text: "USA" }, { cid: 3, text: "320,651,000", value: 320651000 }, { cid: 4, text: "07 Apr 2015", value: new Date(2015, 3, 7) }, { cid: 6, text: "9,161,966", value: 9161966 }, { cid: 7, text: "Washington" }] },
            { id: 51, pid: 5, text: "Argentina", cells: [{ cid: 2, text: "Argentina" }, { cid: 3, text: "43,131,966", value: 43131966 }, { cid: 4, text: "01 Jul 2015", value: new Date(2015, 6, 1) }, { cid: 6, text: "2,736,690", value: 2736690 }, { cid: 7, text: "Buenos Aires" }] },
            { id: 52, pid: 5, text: "Brazil", cells: [{ cid: 2, text: "Brazil" }, { cid: 3, text: "204,134,000", value: 204134000 }, { cid: 4, text: "08 Apr 2015", value: new Date(2015, 3, 8) }, { cid: 6, text: "8,460,415", value: 8460415 }, { cid: 7, text: "Brasília" }] }
        ];
    } 
    
    ngAfterViewInit(){
        this.sortColumn = this.columns[0];
        
        this.sorting = IntegralUISortOrder.Ascending;
        this.grid.selectedColumn = this.sortColumn;
        this.grid.sort(this.sortColumn, this.sorting);

        this.prevColumn = this.sortColumn;
    }

    getCellValue(row: any){
        let cellValue: any = null;

        if (this.sortColumn && row.cells){
            for (let j = 0; j < row.cells.length; j++){
                if (row.cells[j].cid == this.sortColumn.id){
                    cellValue = row.cells[j].value;
                    break;
                }
            }
        }

        return cellValue;
    }

    // Sorting ---------------------------------------------------------------------------

    comparer = (firstRow: any, secondRow: any) => {
        let x: any = this.getCellValue(firstRow);
        let y: any = this.getCellValue(secondRow);

        x = x ? x.valueOf() : null;
        y = y ? y.valueOf() : null;

        switch (this.sorting){
            case IntegralUISortOrder.Ascending:
                if (x < y)
                    return -1;
                else if (x > y)
                    return 1;
                break;

            case IntegralUISortOrder.Descending:
                if (x > y)
                    return -1;
                else if (x < y)
                    return 1;
                break;

            default:
                return 0;
        }
    }

    onColumnClick(e: any){
        if (e.column){
            if (e.column != this.prevColumn){
                if (this.sorting == IntegralUISortOrder.None)
                    this.sorting = IntegralUISortOrder.Ascending;
            }
            else {
                if (this.sorting == IntegralUISortOrder.Ascending)
                    this.sorting = IntegralUISortOrder.Descending;
                else
                    this.sorting = IntegralUISortOrder.Ascending;
            }

            this.sortColumn = e.column;
            this.prevColumn = e.column;

            if (e.column.id == 4)
                this.grid.sort(e.column, this.sorting, this.comparer);
            else
                this.grid.sort(e.column, this.sorting);
        }
    }

    // Export ----------------------------------------------------------------------------

    exportJSON(){
        let data = this.grid.exportToJSON();
        console.log(data);
    }

    exportCSV(){
        let data = this.grid.exportToCSV();
        this.downloadCSV(data, 'grid');
    }

    downloadCSV(data: any, fileName: string){
        let blob = new Blob([data], { type: "text/csv;charset=utf-8;" });

        if (navigator.msSaveBlob) // IE 10+
            navigator.msSaveBlob(blob, this.generateFileName(fileName))
        else {
            let link = document.createElement("a");
            if (link.download !== undefined) {
                let url = URL.createObjectURL(blob);
                link.setAttribute("href", url);
                link.setAttribute("download", this.generateFileName(fileName));

                document.body.appendChild(link);
                link.click();
                document.body.removeChild(link);
            }
        }
    }

    private generateFileName(fileName: string): string {
        let date = new Date();

        return fileName + date.toLocaleDateString() + "_" +  date.toLocaleTimeString() + '.csv';
    }
}