const routes = {
  page1: "pages/page1.html",
  page2: "pages/page2.html",
  page3: "pages/page3.html",
  page4: "pages/page4.html",
  page5: "pages/page5.html",
  page6: "pages/page6.html",
  page7: "pages/page7.html",
  page8: "pages/page8.html",
};

let currentPage = null;

const pageHandlers = {
  page1: {},
  page2: {
    init: () => window.initPage2?.(),
    destroy: () => window.destroyPage2?.()
  },
  page3: {},
  page4: {},
  page5: {},
  page6: {},
  page7: {},
  page8: {},
};

function clearOldScripts() {
  document.querySelectorAll("script[data-dynamic='1']").forEach(s => s.remove());
}

function runScripts(container) {
  const scripts = container.querySelectorAll("script");

  scripts.forEach(oldScript => {
    const s = document.createElement("script");
    s.dataset.dynamic = "1";

    if (oldScript.src) {
      s.src = oldScript.src;
    } else {
      s.textContent = oldScript.textContent;
    }

    document.body.appendChild(s);
  });
}

async function loadPage(name) {
  const view = document.getElementById("view");
  const url = routes[name];

  if (!url) {
    view.innerHTML = "<div class='card'>无法找到页面</div>";
    return;
  }

  try {
    const res = await fetch(url, { credentials: "include" });
    const html = await res.text();

    if (html.includes("login.html") || html.includes("登录")) {
      window.location.href = "/";
      return;
    }

    const temp = document.createElement("div");
    temp.innerHTML = html;

    if (currentPage && pageHandlers[currentPage]?.destroy) {
      pageHandlers[currentPage].destroy();
    }

    clearOldScripts();

    view.innerHTML = "";
    view.appendChild(temp);

    runScripts(temp);
    
    currentPage = name;

    if (pageHandlers[name]?.init) {
      pageHandlers[name].init();
    }
  } catch (e) {
    console.error("loadPage error:", e);
    view.innerHTML = "<div class='card'>页面加载失败</div>";
  }
}