const { PDFNet } = require("@pdftron/pdfnet-node");

type CreateReport = (
  coverPage: Buffer,
  reportTempPath: string,
  reportDatas: {
    [key: string]: any;
  }[]
) => Promise<{
  result: boolean;
  buffer?: ArrayBuffer;
  error?: any;
}>;

export const createReport: CreateReport = async (
  coverPage,
  reportTempPath,
  reportDatas
) => {
  const main = async () => {
    await PDFNet.initialize(process.env.NEXT_PUBLIC_PDFTRON_SERVER_KEY);

    const mainDoc = await PDFNet.PDFDoc.create();
    const buf = await PDFNet.Convert.office2PDFBuffer(coverPage);
    const coverPDFDoc = await PDFNet.PDFDoc.createFromBuffer(buf);

    const options = new PDFNet.Convert.OfficeToPDFOptions();

    await mainDoc.insertPages(
      (await mainDoc.getPageCount()) + 1,
      coverPDFDoc,
      1,
      await coverPDFDoc.getPageCount(),
      PDFNet.PDFDoc.InsertFlag.e_none
    );

    for (const reportData of reportDatas) {
      const resportDataJson = JSON.stringify(reportData);

      const templateDoc = await PDFNet.Convert.createOfficeTemplateWithPath(
        "public" + reportTempPath,
        options
      );

      const pdfdoc = await templateDoc.fillTemplateJson(resportDataJson);

      await mainDoc.insertPages(
        (await mainDoc.getPageCount()) + 1,
        pdfdoc,
        1,
        await pdfdoc.getPageCount(),
        PDFNet.PDFDoc.InsertFlag.e_none
      );
    }

    // await mainDoc.save("test1.pdf", PDFNet.SDFDoc.SaveOptions.e_linearized);

    const buffer = await mainDoc.saveMemoryBuffer(
      PDFNet.SDFDoc.SaveOptions.e_linearized
    );

    return {
      result: true,
      buffer,
    };
  };

  const result = await PDFNet.runWithCleanup(
    main,
    process.env.NEXT_PUBLIC_PDFTRON_SERVER_KEY
  )
    .catch((err: any) => {
      return {
        result: false,
        error: err,
      };
    })
    .then(async (data: any) => {
      return data;
    });

  return result;
};