// ==UserScript==
// @name         PrivateHD Seed Timer
// @namespace    https://privatehd.to/
// @version      1.0.0
// @description  Shows required seed time and whether you can stop seeding each torrent, based on file size.
// @author       you
// @match        https://privatehd.to/profile/*/active*
// @grant        none
// ==/UserScript==

(function () {
  'use strict';

  // ---------------------------------------------------------------------------
  // Formula: required seed time in hours, where x = size in GB
  //   x <= 1        → 72h
  //   1 < x < 50   → 72 + 2x h
  //   x >= 50       → 100 * ln(x) - 219.2023 h
  // ---------------------------------------------------------------------------
  function requiredHours(sizeGB) {
    if (sizeGB <= 1)  return 72;
    if (sizeGB < 50)  return 72 + 2 * sizeGB;
    return 100 * Math.log(sizeGB) - 219.2023;
  }

  // ---------------------------------------------------------------------------
  // Parse a size string like "32.62 GB", "512.00 MB", "1.20 TB" → GB (float)
  // ---------------------------------------------------------------------------
  function parseSizeToGB(str) {
    const m = str.trim().match(/([\d.]+)\s*(B|KB|MB|GB|TB)/i);
    if (!m) return null;
    const val  = parseFloat(m[1]);
    const unit = m[2].toUpperCase();
    const factors = { B: 1e-9, KB: 1e-6, MB: 1e-3, GB: 1, TB: 1e3 };
    return val * (factors[unit] ?? 1);
  }

  // ---------------------------------------------------------------------------
  // Parse elapsed time from the "For" column (last <td> in each row).
  // Examples: "23h", "2d", "5d 3h", "1h 30m", "45m"
  // Returns elapsed hours as a float.
  // ---------------------------------------------------------------------------
  function parseElapsedHours(str) {
    let hours = 0;
    const days  = str.match(/(\d+)\s*d/);
    const hrs   = str.match(/(\d+)\s*h/);
    const mins  = str.match(/(\d+)\s*m/);
    if (days) hours += parseInt(days[1], 10) * 24;
    if (hrs)  hours += parseInt(hrs[1],  10);
    if (mins) hours += parseInt(mins[1], 10) / 60;
    return hours;
  }

  // ---------------------------------------------------------------------------
  // Format hours nicely: "72h 00m" etc.
  // ---------------------------------------------------------------------------
  function fmtHours(h) {
    const days = Math.floor(h / 24);
    const hrs  = Math.floor(h % 24);
    const mins = Math.round((h % 1) * 60);
    if (days > 0) return `${days}d ${hrs}h`;
    return `${hrs}h ${String(mins).padStart(2, '0')}m`;
  }

  // ---------------------------------------------------------------------------
  // Add a "Seed Status" column header
  // ---------------------------------------------------------------------------
  const thead = document.querySelector('table thead tr');
  if (!thead) return;

  const th = document.createElement('th');
  th.textContent = 'Seed Status';
  th.style.whiteSpace = 'nowrap';
  thead.appendChild(th);

  // ---------------------------------------------------------------------------
  // Process each data row
  // ---------------------------------------------------------------------------
  const rows = document.querySelectorAll('table tbody tr');

  rows.forEach(row => {
    const cells = row.querySelectorAll('td');
    // Column layout (0-indexed):
    // 0: icon | 1: name+stats | 2: progress | 3: status | 4: client
    // 5: upload | 6: download | 7: left | 8: ratio | 9: started | 10: updated | 11: For

    const nameCell    = cells[1];
    const forCell     = cells[11]; // "For" — how long you've been seeding

    if (!nameCell || !forCell) {
      const td = document.createElement('td');
      td.textContent = '—';
      row.appendChild(td);
      return;
    }

    // File size lives inside the name cell: fa-database span
    const sizeSpan = nameCell.querySelector('.fa-database');
    const sizeText = sizeSpan ? sizeSpan.textContent.trim() : null;
    const sizeGB   = sizeText ? parseSizeToGB(sizeText) : null;

    const elapsedText = forCell.textContent.trim();
    const elapsed     = parseElapsedHours(elapsedText);
    const required    = sizeGB !== null ? requiredHours(sizeGB) : null;

    const td = document.createElement('td');
    td.style.whiteSpace = 'nowrap';
    td.style.verticalAlign = 'middle';

    if (required === null) {
      td.textContent = 'No size data';
      td.style.color = '#999';
    } else {
      const remaining = required - elapsed;
      const canStop   = remaining <= 0;

      if (canStop) {
        td.innerHTML =
          `<span style="color:#5cb85c;font-weight:bold;">✔ Can stop</span><br>` +
          `<small style="color:#aaa;">Req: ${fmtHours(required)} | Done: ${fmtHours(elapsed)}</small>`;
      } else {
        td.innerHTML =
          `<span style="color:#d9534f;font-weight:bold;">✘ Keep seeding</span><br>` +
          `<small style="color:#aaa;">${fmtHours(remaining)} left of ${fmtHours(required)}</small>`;
      }
    }

    row.appendChild(td);
  });

})();