const API_BASE = 'https://privo.fyi';

const urlInput = document.getElementById('urlInput');
const shortenBtn = document.getElementById('shortenBtn');
const resultArea = document.getElementById('resultArea');
const shortLinkText = document.getElementById('shortLinkText');
const copyBtn = document.getElementById('copyBtn');
const errorMsg = document.getElementById('errorMsg');

shortenBtn.addEventListener('click', async () => {
  let url = urlInput.value.trim();
  errorMsg.style.display = 'none';
  resultArea.style.display = 'none';

  if (!url) { showError('Please enter a URL.'); return; }

  if (!url.startsWith('http://') && !url.startsWith('https://')) {
    url = 'https://' + url;
  }

  shortenBtn.disabled = true;
  shortenBtn.textContent = '...';

  try {
    const res = await fetch(`${API_BASE}/api/link`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ url })
    });

    const data = await res.json();

    if (!res.ok) { throw new Error(data.error || 'Failed to shorten link'); }

    shortLinkText.href = data.short_url;
    shortLinkText.textContent = data.short_url;
    resultArea.style.display = 'block';
    urlInput.value = '';
    urlInput.focus();

  } catch (err) {
    showError(err.message);
  } finally {
    shortenBtn.disabled = false;
    shortenBtn.textContent = 'Shorten';
  }
});

urlInput.addEventListener('keypress', (e) => {
  if (e.key === 'Enter') { shortenBtn.click(); }
});

copyBtn.addEventListener('click', () => {
  navigator.clipboard.writeText(shortLinkText.textContent).then(() => {
    copyBtn.textContent = '✓ Copied!';
    setTimeout(() => { copyBtn.textContent = 'Copy'; }, 2000);
  }).catch(() => {
    const range = document.createRange();
    range.selectNode(shortLinkText);
    window.getSelection().removeAllRanges();
    window.getSelection().addRange(range);
    document.execCommand('copy');
    window.getSelection().removeAllRanges();
    copyBtn.textContent = '✓ Copied!';
    setTimeout(() => { copyBtn.textContent = 'Copy'; }, 2000);
  });
});

function showError(msg) {
  errorMsg.textContent = msg;
  errorMsg.style.display = 'block';
}