// Exporting the document as a stream
// Import from 'docx' rather than '../build' if you install from npm
import * as fs from "fs";
import { Document, HeadingLevel, Packer, Paragraph, TabStopPosition, TabStopType, TextRun } from "../build";

const columnWidth = TabStopPosition.MAX / 4;
const reciptTabStops = [
    // no need to define first left tab column
    // the right aligned tab column position should point to the end of column
    // i.e. in this case 
    // (end position of 1st) + (end position of current)
    // columnWidth + columnWidth = columnWidth * 2
    
    {  type: TabStopType.RIGHT, position: columnWidth * 2 },
    {  type: TabStopType.RIGHT, position: columnWidth * 3 },
    {  type: TabStopType.RIGHT, position: TabStopPosition.MAX } 
], twoTabStops = [
    {  type: TabStopType.RIGHT, position: TabStopPosition.MAX }
];

const doc = new Document({
    sections: [
        {
            properties: {},
            children: [
                new Paragraph({
                    heading: HeadingLevel.HEADING_1,
                    children: [ new TextRun("Recipt 001")],
                }),
                new Paragraph({
                    tabStops: twoTabStops,
                    children: [ 
                        new TextRun({ 
                            text: "To Bob.\tBy Alice.",
                            bold: true
                        })
                    ],
                    
                }),
                new Paragraph({
                    tabStops: twoTabStops,
                    children: [ 
                        new TextRun("Foo Inc\tBar Inc")
                    ],
                }),
                new Paragraph({text: ""}),
                new Paragraph({
                    tabStops: reciptTabStops,
                    
                    children: [
                        new TextRun({
                            text: "Item\tPrice\tQuantity\tSub-total",
                            bold: true
                        })
                    ],
                }),
                new Paragraph({
                    tabStops: reciptTabStops,
                    text: "Item 3\t10\t5\t50",
                }),
                new Paragraph({
                    tabStops: reciptTabStops,
                    text: "Item 3\t10\t5\t50",
                }),
                new Paragraph({
                    tabStops: reciptTabStops,
                    text: "Item 3\t10\t5\t50"
                }),
                new Paragraph({
                    tabStops: reciptTabStops,
                    children: [
                        new TextRun({
                            text: "\t\tTotal: 200",
                            bold: true
                        })
                    ],
                })
            ],
        },
    ],
});


const stream = Packer.toStream(doc);
stream.pipe(fs.createWriteStream("My Document.docx"));