import * as html_to_pdf from "html-pdf-node"

import { prepare, gettimefromintervalls } from "./main.js"
import { c, writePDF } from './files.js'

let date = new Date();
date = date.toLocaleDateString("de-DE", {
  weekday: 'long',
  year: 'numeric',
  month: 'long',
  day: 'numeric',
});

let hinweise = "<ul>";
for (let hinweis of c.hinweise) {
  hinweise += `<li>${hinweis}</li>`;
}
hinweise += `</ul>`;

const options = {
  format: 'A4',
  landscape: true,
  margin: {
    top: "0.5cm",
    right: "1cm",
    bottom: "1cm",
    left: "2cm",
  },
};

function format() {
  let tage_runtimes = prepare()
  let timeout = {}
  let res = "";

  // 1h has 4 15 minute intervalls: 08 to 19 means 44 intervalls
  for (let i = 0; i < 44; i++) {
    let mensa = "";

    if (11 < i && i < 25) mensa = "mensa1";
    if (25 < i && i < 27) mensa = "mensa2";

    res += `<tr class="${mensa}">` + gettimefromintervalls(i)

    for (let day in tage_runtimes) {
      if (timeout[day] > 0) {
        timeout[day]--;
        continue;
      }

      let el = tage_runtimes[day][0];

      if (el.name.includes("STYLECLASS")) {
        let styleclass = el.name.split("/")[1].trim().toLowerCase();
        res += `<td rowspan="${el.runtime}" class="${styleclass}"></td>`;
      } else {
        let name = el.name == "BUFFER" ? "" : `<div><span>${el.name}</span>`;
        let raum = el.raum == "BUFFER" ? "" : `<span>${el.raum}</span>`;

        res += `<td rowspan="${el.runtime}">${name}${raum}</td>`;
      }

      timeout[day] = el.runtime - 1;
      tage_runtimes[day].splice(0, 1);
    }

    res += "</tr>"
  }

  return res
}

function generatePDF() {
  let html = `
  ${c.style}
  <p>Persönlicher Stundenplan von ${c.student} für das ${c.semester}. Stand: ${date}.</p>
  <table>
    <tr>
      <th>Uhrzeit</th>
      <th class="tag">Montag</th>
      <th class="tag">Dienstag</th>
      <th class="tag">Mittwoch</th>
      <th class="tag">Donnerstag</th>
      <th class="tag">Freitag</th>
    </tr>
    ${format()}
  </table>
  <br>
  <em>Hinweise:</em>
  ${hinweise}
  `;

  html_to_pdf.generatePdf({content: html}, options).then(pdfBuffer => {writePDF(pdfBuffer)});
}

generatePDF()