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;
let loadingPage = false;

const pageHandlers = {
  page1: {
    init: () => window.initPage1?.(),
    exit: () => window.exitPage1?.()
  },
  page2: {
    init: () => window.initPage2?.(),
    exit: () => window.exitPage2?.()
  },
  page3: {
    init: () => window.initPage3?.(),
    exit: () => window.exitPage3?.()
  },
  page4: {
    init: () => window.initPage4?.(),
    exit: () => window.exitPage4?.()
  },
  page5: {
    init: () => window.initPage5?.(),
    exit: () => window.exitPage5?.()
  },
  page6: {
    init: () => window.initPage6?.(),
    exit: () => window.exitPage6?.()
  },
  page7: {
    init: () => window.initPage7?.(),
    exit: () => window.exitPage7?.()
  },
  page8: {
    init: () => window.initPage8?.(),
    exit: () => window.exitPage8?.()
  },
};

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 = "无法找到页面";
    return;
  }

  if (loadingPage) {
    return;
  }

  if (currentPage === name) {
    return;
  }

  try {
    loadingPage = true;

    if (currentPage && pageHandlers[currentPage]?.exit) {
      console.log("exit:", currentPage);
      pageHandlers[currentPage].exit();
    }

    clearOldScripts();

    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;
    }

    view.innerHTML = html;

    runScripts(view);

    currentPage = name;

    if (pageHandlers[name]?.init) {
      console.log("init:", name);
      pageHandlers[name].init();
    }

  } catch (e) {
    console.error("loadPage error:", e);
    view.innerHTML = "页面加载失败";
  } finally {
    loadingPage = false;
  }
}

function setText(id, value, page)
{
  if (page && currentPage !== page) {
    return;
  }

  const el = document.getElementById(id);
  if (el) el.textContent = value ?? "--";
}


function setBtnStatus(id, enabled, page)
{
  if (page && currentPage !== page) {
      return;
  }

  const btn = document.getElementById(id);
  if (btn) btn.disabled = !enabled;
}