const SETTINGS_KEY = "webToPixsoSettings";
const HELP_URL = "https://z8qrcvi3n5.feishu.cn/wiki/RV8TwlhFyiGsEekQXk8cX5SHn6f";
const DEFAULT_SETTINGS = {
  useProxy: false,
  concurrency: "8",
  captureMode: "mixed",
  captureWidth: null
};
const MIN_CAPTURE_WIDTH = 320;
const MAX_CAPTURE_WIDTH = 3840;

const captureModeSelect = document.getElementById("captureMode");
const proxyToggle = document.getElementById("proxyToggle");
const captureWidthInput = document.getElementById("captureWidth");
const concurrencySelect = document.getElementById("concurrency");
const captureBtn = document.getElementById("captureBtn");
const btnText = document.getElementById("btnText");
const selectBtn = document.getElementById("selectBtn");
const selectBtnText = document.getElementById("selectBtnText");
const status = document.getElementById("status");
const statusText = document.getElementById("statusText");
const progressFill = document.getElementById("progressFill");
const closeBtn = document.getElementById("closeBtn");
const helpLink = document.getElementById("helpLink");

function normalizeSettings(value = {}) {
  const concurrency = String(value.concurrency || DEFAULT_SETTINGS.concurrency);
  const captureWidth = normalizeCaptureWidth(value.captureWidth, null);
  return {
    useProxy: Boolean(value.useProxy),
    concurrency: ["4", "6", "8", "10", "12", "16", "20", "infinite"].includes(concurrency)
      ? concurrency
      : DEFAULT_SETTINGS.concurrency,
    captureMode: value.captureMode === "editable" ? "editable" : "mixed",
    captureWidth
  };
}

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;
  }
}

async function getSettings() {
  const result = await chrome.storage.local.get({ [SETTINGS_KEY]: DEFAULT_SETTINGS });
  return normalizeSettings(result[SETTINGS_KEY]);
}

async function saveSettings(settings) {
  await chrome.storage.local.set({ [SETTINGS_KEY]: normalizeSettings(settings) });
}

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

function setBusy(isBusy) {
  captureBtn.disabled = isBusy;
  selectBtn.disabled = isBusy;
  captureBtn.classList.toggle("loading", isBusy);
  selectBtn.classList.toggle("loading", isBusy);
  captureBtn.classList.remove("success", "error");
  btnText.textContent = isBusy ? "采集中..." : "开始采集";
  selectBtnText.textContent = isBusy ? "正在打开浮窗..." : "打开页面浮窗";
}

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

async function syncSettingsFromUI() {
  await saveSettings({
    captureMode: captureModeSelect.value,
    useProxy: proxyToggle.checked,
    concurrency: concurrencySelect.value,
    captureWidth: normalizeCaptureWidth(captureWidthInput.value, null)
  });
}

function sanitizeCaptureWidthInput({ clamp = false } = {}) {
  const digits = captureWidthInput.value.replace(/\D+/g, "");
  captureWidthInput.value = digits;
  const width = normalizeCaptureWidth(digits, null);
  const rawNumber = Number.parseInt(digits, 10);
  let invalid = Boolean(digits) && Number.isFinite(rawNumber) &&
    (rawNumber < MIN_CAPTURE_WIDTH || rawNumber > MAX_CAPTURE_WIDTH);
  captureWidthInput.classList.toggle("invalid", invalid);
  if (clamp && digits) {
    captureWidthInput.value = String(width);
    invalid = false;
    captureWidthInput.classList.remove("invalid");
  }
  return width;
}

function readSettingsFromUI() {
  return normalizeSettings({
    captureMode: captureModeSelect.value,
    useProxy: proxyToggle.checked,
    concurrency: concurrencySelect.value,
    captureWidth: sanitizeCaptureWidthInput({ clamp: true })
  });
}

async function startCapture() {
  setBusy(true);
  setProgress(12, "准备当前网页...");

  const settings = readSettingsFromUI();
  await saveSettings(settings);

  try {
    setProgress(28, "注入采集脚本...");
    const response = await chrome.runtime.sendMessage({
      type: "PIXSO_CAPTURE_START",
      options: settings
    });

    if (!response || !response.ok) {
      throw new Error(response?.error || "采集失败");
    }

    const viewportText = response.actualViewportWidth
      ? `已按 ${response.actualViewportWidth}px 采集`
      : "已按当前页面尺寸采集";
    setProgress(100, `${viewportText}：${response.filename}`);
    setResult("success", "采集完成");
    setTimeout(() => window.close(), 900);
  } catch (error) {
    setProgress(0, error.message || String(error));
    setResult("error", "采集失败");
    setTimeout(() => {
      setBusy(false);
      status.hidden = true;
      progressFill.style.width = "0";
    }, 2600);
  }
}

async function startFloatingToolbar() {
  setBusy(true);
  setProgress(18, "正在打开页面采集浮窗...");

  const settings = readSettingsFromUI();
  await saveSettings(settings);

  try {
    const [tab] = await chrome.tabs.query({ active: true, currentWindow: true });
    if (!tab?.id) throw new Error("没有可选择的当前标签页");

    await chrome.scripting.executeScript({
      target: { tabId: tab.id },
      files: ["element-picker.js"]
    });

    await chrome.scripting.executeScript({
      target: { tabId: tab.id },
      func: pickerSettings => window.__webToPixsoShowCaptureToolbar?.(pickerSettings),
      args: [settings]
    });

    setProgress(100, "请在页面浮窗中选择整页或元素采集。");
    setTimeout(() => window.close(), 500);
  } catch (error) {
    setProgress(0, error.message || String(error));
    setResult("error", "采集失败");
    setTimeout(() => {
      setBusy(false);
      status.hidden = true;
      progressFill.style.width = "0";
    }, 2600);
  }
}

document.addEventListener("DOMContentLoaded", async () => {
  const settings = await getSettings();
  const currentWidth = await getCurrentViewportWidth();
  captureModeSelect.value = settings.captureMode;
  proxyToggle.checked = settings.useProxy;
  concurrencySelect.value = settings.concurrency;
  captureWidthInput.value = String(settings.captureWidth || currentWidth || "");
});

captureModeSelect.addEventListener("change", syncSettingsFromUI);
proxyToggle.addEventListener("change", syncSettingsFromUI);
concurrencySelect.addEventListener("change", syncSettingsFromUI);
captureWidthInput.addEventListener("input", () => {
  sanitizeCaptureWidthInput();
  syncSettingsFromUI();
});
captureWidthInput.addEventListener("blur", () => {
  sanitizeCaptureWidthInput({ clamp: true });
  syncSettingsFromUI();
});
captureBtn.addEventListener("click", startCapture);
selectBtn.addEventListener("click", startFloatingToolbar);
closeBtn.addEventListener("click", () => window.close());
helpLink?.addEventListener("click", async event => {
  event.preventDefault();
  await chrome.tabs.create({ url: HELP_URL });
  window.close();
});