const SETTINGS_KEY = 'webToPixsoSettings';
const DEFAULT_SETTINGS = { useProxy: false, concurrency: '8', captureMode: 'mixed', captureWidth: null };
const MIN_CAPTURE_WIDTH = 320;
const MAX_CAPTURE_WIDTH = 3840;

const captureWidthInput = document.getElementById('captureWidth');
const exportBtn = document.getElementById('exportBtn');
const btnText = document.getElementById('btnText');
const status = document.getElementById('status');
const statusText = document.getElementById('statusText');
const progressFill = document.getElementById('progressFill');

function normalizeCaptureWidth(value, fallback = null) {
  const number = Number.parseInt(String(value || '').replace(/\D+/g, ''), 10);
  if (!Number.isFinite(number)) return fallback;
  return Math.max(MIN_CAPTURE_WIDTH, Math.min(MAX_CAPTURE_WIDTH, number));
}

async function getCurrentViewportWidth() {
  try {
    const [tab] = await chrome.tabs.query({ active: true, currentWindow: true });
    if (!tab?.id) return null;
    const [{ result }] = await chrome.scripting.executeScript({
      target: { tabId: tab.id },
      func: () => Math.round(window.innerWidth || document.documentElement.clientWidth || 0)
    });
    return normalizeCaptureWidth(result, null);
  } catch { return null; }
}

function setProgress(percent, text) {
  status.hidden = false;
  progressFill.style.width = `${Math.max(0, Math.min(100, percent))}%`;
  statusText.textContent = text;
}

function setBusy(isBusy) {
  exportBtn.disabled = isBusy;
  exportBtn.classList.toggle('loading', isBusy);
  exportBtn.classList.remove('success', 'error');
  btnText.textContent = isBusy ? '处理中...' : '导出 PPTX';
}

function setResult(kind, text) {
  exportBtn.classList.remove('loading', 'success', 'error');
  exportBtn.classList.add(kind);
  btnText.textContent = text;
}

async function exportPptx() {
  setBusy(true);
  setProgress(5, '准备采集...');

  const captureWidth = normalizeCaptureWidth(captureWidthInput.value, null);

  try {
    // 1. 采集
    setProgress(15, '正在采集页面...');
    const captureResult = await chrome.runtime.sendMessage({
      type: 'WEB_TO_PPT_CAPTURE_START',
      options: { captureWidth }
    });
    if (!captureResult || !captureResult.ok) throw new Error(captureResult?.error || '采集失败');

    // 2. 获取数据
    setProgress(40, '采集完成，获取数据...');
    const dataResult = await chrome.runtime.sendMessage({ type: 'WEB_TO_PPT_GET_DATA' });
    if (!dataResult || !dataResult.ok) throw new Error(dataResult?.error || '获取数据失败');

    // 3. 转化
    setProgress(50, '正在生成 PPTX...');
    const schema = await WebToPPT.convertToPptx(dataResult.data, (msg) => setProgress(60, msg));

    // 4. 生成 PPTX
    setProgress(85, '正在打包...');
    const blob = await WebToPPT.schemaToPptxBlob(schema);

    // 5. 下载（data URL，popup 直接调用）
    setProgress(95, '正在下载...');
    const buffer = await blob.arrayBuffer();
    const bytes = new Uint8Array(buffer);
    let binary = '';
    for (let i = 0; i < bytes.length; i += 0x8000) {
      binary += String.fromCharCode(...bytes.subarray(i, i + 0x8000));
    }
    const dataUrl = 'data:application/vnd.openxmlformats-officedocument.presentationml.presentation;base64,' + btoa(binary);

    const title = dataResult.data.source?.title || 'webpage';
    const safeTitle = title.replace(/[\\/:*?"<>|]+/g, '-').replace(/\s+/g, '-').slice(0, 64) || 'webpage';
    const filename = `web-to-ppt/${safeTitle}-${Date.now()}.pptx`;

    await chrome.downloads.download({ url: dataUrl, filename });

    setProgress(100, '导出完成');
    setResult('success', '导出完成');

  } catch (error) {
    setProgress(0, error.message || String(error));
    setResult('error', '导出失败');
    setTimeout(() => {
      setBusy(false);
      status.hidden = true;
      progressFill.style.width = '0';
    }, 3000);
  }
}

document.addEventListener('DOMContentLoaded', async () => {
  const currentWidth = await getCurrentViewportWidth();
  captureWidthInput.value = String(currentWidth || '');
});

exportBtn.addEventListener('click', exportPptx);
captureWidthInput.addEventListener('input', () => {
  captureWidthInput.value = captureWidthInput.value.replace(/\D+/g, '');
});