const startBtn = document.getElementById('startBtn');
const stopBtn = document.getElementById('stopBtn');
const viewBtn = document.getElementById('viewBtn');
const downloadBtn = document.getElementById('downloadBtn');
const statusDiv = document.getElementById('status');
const eventsDiv = document.getElementById('events');

function updateStatus(text) {
  statusDiv.textContent = text;
}

function setRecording(isRecording) {
  startBtn.disabled = isRecording;
  startBtn.classList.toggle('disabled', isRecording);
  stopBtn.disabled = !isRecording;
  stopBtn.classList.toggle('disabled', !isRecording);
}

startBtn.addEventListener('click', async () => {
  const [tab] = await chrome.tabs.query({ active: true, currentWindow: true });
  if (!tab) return;

  // First inject content script programmatically
  try {
    await chrome.scripting.executeScript({
      target: { tabId: tab.id },
      files: ['content.js']
    });
  } catch(e) {
    // Might already be injected, that's ok
  }

  chrome.runtime.sendMessage({ action: 'startRecording', tabId: tab.id }, (resp) => {
    if (resp && resp.ok) {
      setRecording(true);
      updateStatus('Recording...');
    }
  });
});

stopBtn.addEventListener('click', () => {
  chrome.runtime.sendMessage({ action: 'stopRecording' }, (resp) => {
    if (resp && resp.ok) {
      setRecording(false);
      updateStatus('Stopped. Captured ' + resp.eventCount + ' events.');
      viewBtn.disabled = false;
      viewBtn.classList.remove('disabled');
      downloadBtn.disabled = false;
      downloadBtn.classList.remove('disabled');
    }
  });
});

viewBtn.addEventListener('click', () => {
  chrome.runtime.sendMessage({ action: 'getEvents' }, (resp) => {
    if (resp && resp.events) {
      const summary = resp.events.map((e, i) =>
        `${i}: type=${e.type} ts=${e.timestamp}`
      ).join('\n');
      eventsDiv.textContent = `Total: ${resp.events.length} events\n\n${summary}`;
    }
  });
});

downloadBtn.addEventListener('click', () => {
  chrome.runtime.sendMessage({ action: 'getEvents' }, (resp) => {
    if (resp && resp.events) {
      const blob = new Blob([JSON.stringify(resp.events, null, 2)], { type: 'application/json' });
      const url = URL.createObjectURL(blob);
      const a = document.createElement('a');
      a.href = url;
      a.download = 'rrweb-events.json';
      a.click();
      URL.revokeObjectURL(url);
    }
  });
});

// Check current status on open
chrome.runtime.sendMessage({ action: 'getStatus' }, (resp) => {
  if (resp) {
    setRecording(resp.recording);
    updateStatus(resp.recording
      ? 'Recording... (' + resp.eventCount + ' events)'
      : 'Ready');
    if (resp.eventCount > 0) {
      viewBtn.disabled = false;
      viewBtn.classList.remove('disabled');
      downloadBtn.disabled = false;
      downloadBtn.classList.remove('disabled');
    }
  }
});