import {
    CreateDocx,
    OptionsAltchunk,
    OptionsReplaceVariableExternalFile,
    WordFragment,
} from "build";
import * as fs from "fs";

const docxTemplate = fs.readFileSync("template.docx").buffer;

const docx = new CreateDocx();
// load the template
docx.openTemplate(docxTemplate).then(docx => {
    const fileDocx = fs.readFileSync("file.docx").buffer;
    const html = fs.readFileSync("../../files/Test.html", "utf8");
    const encoder = new TextEncoder();

    const externalFileDocxWordFragment = new WordFragment();
    const externalFileDocx: OptionsAltchunk = {
        file: fileDocx,
        type: "docx",
    };
    externalFileDocxWordFragment.addExternalFile(externalFileDocx);

    const externalFileHtmlWordFragment = new WordFragment();
    const externalFileHtml: OptionsAltchunk = {
        file: encoder.encode(html).buffer,
        type: "html",
    };
    externalFileHtmlWordFragment.addExternalFile(externalFileHtml);

    // variables to be replaced
    const variablesDocument = new Map();
    variablesDocument.set("VARNAME", externalFileDocxWordFragment);
    variablesDocument.set("OTHERVAR", externalFileHtmlWordFragment);

    // replace variables
    const optionsReplaceVariableExternalFile: OptionsReplaceVariableExternalFile =
        {
            firstMatch: true,
        };
    docx.replaceVariableExternalFile(
        variablesDocument,
        optionsReplaceVariableExternalFile
    );

    // save the DOCX
    docx.save().then(contents => {
        fs.writeFileSync(
            "replaceVariableExternalFile_1.docx",
            Buffer.from(contents)
        );
    });
});