/* ── SenSu WebUI — Theme + Routing + Page Loader ── */

// ═══ 主题初始化 (必须在渲染前, 防闪白) ═══
(function(){
  var s = localStorage.getItem("sensu-theme") || "dark";
  document.documentElement.setAttribute("data-theme", s);
})();

window.toggleTheme = function(){
  var t = document.documentElement.getAttribute("data-theme") === "light" ? "dark" : "light";
  document.documentElement.setAttribute("data-theme", t);
  localStorage.setItem("sensu-theme", t);
  var btn = document.querySelector(".theme-toggle");
  if(btn) btn.textContent = t === "light" ? "☀️" : "🌙";
};


// ═══ 路由系统 ═══
// Hash format: #/dashboard  |  #/files  |  #/plugins/example_plugin
// Built-in pages map to ./static/pages/{name}.html
// Plugin pages load from /plugin/{name}

var BUILTIN_PAGES = ['dashboard','logs','console','plugins','projects','proxy','files'];
var _pluginPagesCache = null; // {plugin_name: {path, title, icon}}

function currentRoute() {
  var h = location.hash.replace('#', '') || '/dashboard';
  return h.replace(/^\/+/, '');
}

function navigateTo(route) {
  if (!route) route = 'dashboard';
  location.hash = '#' + route;  // triggers hashchange → routePage()
}

function routePage() {
  var r = currentRoute();
  if (r.startsWith('plugins/')) {
    loadPluginPage(r.replace('plugins/', ''));
  } else if (BUILTIN_PAGES.indexOf(r) >= 0) {
    loadPage(r);
  } else {
    loadPage('dashboard');
    location.hash = '#/dashboard';
  }
}

// ═══ onload ═══
window.onload = async function() {
  var btn = document.querySelector(".theme-toggle");
  if(btn) btn.textContent = document.documentElement.getAttribute("data-theme") === "light" ? "☀️" : "🌙";

  try {
    var res = await fetch('./api/auth/status', {credentials:'include'});
    if(res.status === 401 || !res.ok) {
      sessionStorage.setItem('sensu_redirect_hash', location.hash);
      window.location.href = './index.html'; return;
    }
    var data = await res.json();
    if(!data.authenticated) {
      sessionStorage.setItem('sensu_redirect_hash', location.hash);
      window.location.href = './index.html'; return;
    }
    document.getElementById('uname').textContent = data.username || 'Admin';
  } catch(e) { window.location.href = './index.html'; }

  window.addEventListener('hashchange', routePage);
  routePage(); // load from current hash (or default to dashboard)
};


// ═══ Page loader (built-in pages) ═══
async function loadPage(pageName) {
  var content = document.getElementById('page-content');
  var bar = document.getElementById('progress');

  // Sidebar highlight
  document.querySelectorAll('.nav-item').forEach(function(el){ el.classList.remove('active'); });
  document.querySelectorAll('.nav-sub-item').forEach(function(el){ el.classList.remove('active'); });
  var navItem = document.querySelector('.nav-item[data-page="'+pageName+'"]');
  if(navItem) navItem.classList.add('active');
  content.style.padding = '';

  // Progress
  bar.classList.add('active'); bar.style.width = '0%';
  await new Promise(function(r){ requestAnimationFrame(function(){ bar.style.width='80%'; setTimeout(r,100); }); });

  // Destroy previous module
  var modName = pageName.charAt(0).toUpperCase() + pageName.slice(1) + 'Module';
  if(window[modName] && window[modName].destroy) { try { window[modName].destroy(); } catch(e){} }

  try {
    var resp = await fetch('./static/pages/'+pageName+'.html');
    if(!resp.ok) throw new Error('404');
    var html = await resp.text();

    var scripts = [];
    var cleanHtml = html.replace(/<script\b[^>]*>([\s\S]*?)<\/script>/gi, function(m,code){ scripts.push(code.trim()); return ''; });
    content.innerHTML = cleanHtml;

    scripts.forEach(function(code){
      try { var s=document.createElement('script'); s.textContent=code; document.head.appendChild(s); document.head.removeChild(s); }
      catch(ex){ console.error('Inline script error:', ex); }
    });

    // External JS module
    try {
      var jsResp = await fetch('./static/pages/'+pageName+'.js?t='+Date.now());
      if(jsResp.ok) {
        var jsCode = await jsResp.text();
        var s=document.createElement('script'); s.textContent=jsCode; document.head.appendChild(s); document.head.removeChild(s);
        if(window[modName] && window[modName].init) window[modName].init();
      }
    } catch(e){ console.error('Page JS error:', pageName, e); }

    bar.style.width = '100%';
    setTimeout(function(){ bar.classList.remove('active'); }, 200);
  } catch(e) {
    content.innerHTML = '<div style="color:var(--error);text-align:center;margin-top:20vh">页面加载失败: '+e.message+'</div>';
    bar.style.background='var(--error)';
    setTimeout(function(){ bar.style.width='100%'; setTimeout(function(){ bar.classList.remove('active'); bar.style.background='var(--primary)'; },200); },100);
  }
}


// ═══ Plugin page loader ═══
async function loadPluginPage(pluginName) {
  var content = document.getElementById('page-content');
  var bar = document.getElementById('progress');

  // Highlight sub-item
  document.querySelectorAll('.nav-item').forEach(function(el){ el.classList.remove('active'); });
  document.querySelectorAll('.nav-sub-item').forEach(function(el){ el.classList.remove('active'); });
  var sub = document.querySelector('.nav-sub-item[data-plugin="'+pluginName+'"]');
  if(sub) sub.classList.add('active');

  bar.classList.add('active'); bar.style.width='0%';
  await new Promise(function(r){ requestAnimationFrame(function(){ bar.style.width='80%'; setTimeout(r,100); }); });

  // Also load plugin pages list if not yet
  if(!_pluginPagesCache) await fetchPluginPages();

  try {
    var resp = await fetch('/plugin/'+pluginName, {credentials:'include'});
    if(!resp.ok) throw new Error(resp.status);
    var html = await resp.text();

    var styles = '';
    html.replace(/<style\b[^>]*>([\s\S]*?)<\/style>/gi, function(m,code){ styles+=code; return ''; });

    var bodyMatch = html.match(/<body\b[^>]*>([\s\S]*)<\/body>/i);
    var clean = bodyMatch ? bodyMatch[1] : html.replace(/<html[^>]*>|<\/html>|<head[^>]*>[\s\S]*?<\/head>|<body[^>]*>|<\/body>/gi, '');

    var scripts = [];
    clean = clean.replace(/<script\b[^>]*>([\s\S]*?)<\/script>/gi, function(m,code){ scripts.push(code.trim()); return ''; });

    content.style.padding = '0';
    content.innerHTML = '<style>'+styles+'</style>'+clean;

    scripts.forEach(function(code){
      try { var s=document.createElement('script'); s.textContent=code; document.head.appendChild(s); document.head.removeChild(s); }
      catch(ex){ console.error('Plugin script error:', ex); }
    });

    bar.style.width='100%';
    setTimeout(function(){ bar.classList.remove('active'); }, 200);
  } catch(ex) {
    content.innerHTML = '<div style="color:var(--error);text-align:center;margin-top:20vh">插件页面加载失败: '+ex.message+'</div>';
    bar.style.background='var(--error)';
    setTimeout(function(){ bar.style.width='100%'; setTimeout(function(){ bar.classList.remove('active'); bar.style.background='var(--primary)'; },200); },100);
  }
}


// ═══ Global file/dir picker (reusable by any page) ═══
// Usage: pickPath('dir', function(path) { document.getElementById('my-input').value = path; })
window.pickPath = function(mode, callback) {
  var id = 'picker_' + Date.now();
  window['_pickCallback_' + id] = callback;
  var url = './static/pages/files.html?picker=1&mode=' + (mode || 'dir') + '&cb=' + id;
  var w = window.open(url, 'fm-picker', 'width=680,height=520');
  if (!w) { alert('请允许弹窗以使用文件选择器'); return; }
  // Listen for pick result
  window.addEventListener('message', function handler(e) {
    try {
      var d = JSON.parse(e.data);
      if (d.action === 'fm-picked' && d.callback_id === id) {
        window.removeEventListener('message', handler);
        if (d.path && callback) callback(d.path);
      }
    } catch(ex) {}
  });
};

// ═══ Sidebar toggle ═══
function toggleSidebar() {
  document.getElementById('app').classList.toggle('collapsed');
}

// ═══ Logout ═══
async function doLogout() {
  await fetch('./api/logout', {method:'POST', credentials:'include'});
  window.location.href = './index.html';
}


// ═══ Plugin pages expand/collapse ═══
async function fetchPluginPages() {
  try {
    var res = await fetch('./api/plugin-pages', {credentials:'include'});
    var data = await res.json();
    _pluginPagesCache = {};
    (data.pages||[]).forEach(function(p){ _pluginPagesCache[p.plugin] = p; });
    return _pluginPagesCache;
  } catch(e) { return {}; }
}

async function togglePluginPages() {
  var body = document.getElementById('nav-plugins-body');
  var arrow = document.getElementById('nav-plugins-arrow');
  var isOpen = body.style.display !== 'none';
  if(isOpen){ body.style.display='none'; arrow.style.transform=''; return; }
  body.style.display='block';
  arrow.style.transform='rotate(180deg)';

  if(!_pluginPagesCache) await fetchPluginPages();
  var pages = _pluginPagesCache || {};
  var names = Object.keys(pages);
  if(names.length) {
    var html = '';
    names.forEach(function(name){
      var p = pages[name];
      html += '<div class="nav-sub-item" data-plugin="'+p.plugin+'" data-path="'+p.path+'">'+
        '<span class="nav-icon">'+(p.icon||'P')+'</span><span>'+p.title+'</span></div>';
    });
    body.innerHTML = html;
  }
}

// ═══ Click delegation ═══
document.addEventListener('click', function(e) {
  // Built-in nav
  var nav = e.target.closest('.nav-item');
  if(nav && nav.dataset.page) {
    navigateTo(nav.dataset.page);
    e.preventDefault();
    return;
  }
  // Plugin sub-item
  var sub = e.target.closest('.nav-sub-item');
  if(sub && sub.dataset.plugin) {
    navigateTo('plugins/' + sub.dataset.plugin);
    e.preventDefault();
  }
});