import { normalize, join } from "std/path/mod.ts";

const secretFile = normalize(Deno.args[0]);
const outDir = normalize(Deno.args[1]);

const decoder = new TextDecoder("utf-8");
const authToken = decoder.decode(await Deno.readFile(secretFile)).trim();

const getFromAPI = (url: string, body: Record<string, any>) => fetch(
  url,
  {
    method: 'POST',
    headers: new Headers({
      'Content-Type': 'application/json',
      'Accept': 'application/json',
    }),
    body: JSON.stringify({ authToken, ...body }),
  }
);

const response = await getFromAPI(
  "https://secure.hosting.de/api/billing/v1/json/documentsFind",
  { limit: 50, sort: { field: 'documentDate', order: 'DESC' }},
);

const body = await response.json();

if (body.status !== "success") {
  console.error(body.errors);
  throw new Error();
}

interface InvoiceDocument {
  documentId: string;
}

const documents = body.response.data as InvoiceDocument[];

await Promise.all(documents.map(async (doc) => {
  const pdfResponse = await getFromAPI(
    "https://secure.hosting.de/api/billing/v1/json/accountingDocumentPdfGet",
    { id: doc.documentId },
  );

  const fileBody = await pdfResponse.json();
  if (body.status !== "success") {
    console.error(body.errors);
    throw new Error();
  }

  const url = fileBody.response;
  const fileResponse = await fetch(url);
  console.log(fileResponse);
  const fileContents = await fileResponse.blob();
  const fileNameHeader = fileResponse.headers.get('content-disposition') || '';
  const fileName = fileNameHeader.split('=')[1];

  await Deno.writeFile(join(outDir, fileName), fileContents.stream());
}));