/* ── 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);
})();

// ═══ 工具函数 ═══
function getCookie(name) {
  var match = document.cookie.match(new RegExp('(^| )' + name + '=([^;]+)'));
  return match ? match[2] : '';
}

// ── 顶部版本检查 ──
async function checkTopUpdate() {
  var btn = document.getElementById("top-ver-btn");
  try {
    var r = await fetch("./api/updates"), d = await r.json();
    var ver = d.current_version || d.latest_version || "";
    btn.textContent = ver ? ver : "v?";
    if (d.update_available) {
      btn.textContent = "↻ " + d.latest_version + " 可用";
      btn.style.color = "var(--success)";
      btn.title = "新版本可用! " + d.latest_version;
    } else if (ver) {
      btn.style.color = "";
      btn.title = "已是最新 " + ver;
    }
  } catch(e) {}
}
setTimeout(checkTopUpdate, 3000);
setInterval(checkTopUpdate, 600000); // 10min

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','settings'];
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?t='+Date.now());
    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;

      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+'?t='+Date.now(), {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 ''; });

    // Scope plugin styles: replace body selector with .plugin-page-root to avoid
    // styling the main page's <body> element
    styles = styles.replace(/body\s*\{/gi, '.plugin-page-root{').replace(/body\b/gi, '.plugin-page-root');

    content.style.padding = '0';
    content.innerHTML = '<div class="plugin-page-root"><style>'+styles+'</style>'+clean+'</div>';

      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 (in-page overlay, no iframe) ═══
window.pickPath = function(mode, callback) {
  var id = 'picker_' + Date.now();

  // Create modal overlay
  var overlay = document.createElement('div');
  overlay.id = 'fm-picker-overlay';
  overlay.style.cssText = 'position:fixed;inset:0;z-index:500;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center';

  var box = document.createElement('div');
  box.style.cssText = 'background:var(--md-sys-color-surface-container-high);border-radius:var(--shape-lg);width:720px;height:520px;max-width:95vw;max-height:85vh;display:flex;flex-direction:column;overflow:hidden;box-shadow:var(--md-sys-elevation-5)';

  // Header with close button
  var header = document.createElement('div');
  header.style.cssText = 'display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid var(--outline);flex-shrink:0';
  var headerTitle = document.createElement('span');
  headerTitle.style.cssText = 'font-weight:500;color:var(--primary)';
  headerTitle.textContent = '📂 选择' + (mode==='file'?'文件':'目录');
  header.appendChild(headerTitle);
  var closeBtn = document.createElement('span');
  closeBtn.style.cssText = 'cursor:pointer;font-size:20px;line-height:1;padding:4px 8px;border-radius:4px;color:var(--text-dim)';
  closeBtn.textContent = '✕';
  closeBtn.onclick = function(){ closePicker(); };
  header.appendChild(closeBtn);
  box.appendChild(header);

  // Content area — load file manager via fetch
  var contentArea = document.createElement('div');
  contentArea.style.cssText = 'flex:1;overflow:hidden;display:flex;flex-direction:column';
  box.appendChild(contentArea);
  overlay.appendChild(box);
  document.body.appendChild(overlay);

  // Close on backdrop click
  overlay.addEventListener('click', function(e){ if(e.target===overlay) closePicker(); });

  function closePicker() {
    if(overlay.parentNode) overlay.parentNode.removeChild(overlay);
  }

  // Load file manager HTML into content area
  fetch('./static/pages/files.html?t=' + Date.now())
    .then(function(r){ return r.text(); })
    .then(function(html){
      // Strip meta and CSS link (already available in main page)
      html = html.replace(/<meta[^>]*>/gi, '').replace(/<link[^>]*>/gi, '');
      // Extract inline scripts
      var scripts = [];
      var clean = html.replace(/<script\b[^>]*>([\s\S]*?)<\/script>/gi, function(m,code){ scripts.push(code.trim()); return ''; });
      contentArea.innerHTML = clean;
      // Execute scripts
        try { var s=document.createElement('script'); s.textContent=code; document.head.appendChild(s); document.head.removeChild(s); }
        catch(ex){}
      });
      // Load files.js if not already loaded
      // Fix container height for overlay
      var fmContainer = contentArea.querySelector('.fm-container');
      if(fmContainer) fmContainer.style.height = '100%';
      function doInit(){
        window.FilesModule._apiBase = '';
        window.FilesModule.currentPath = '';
        window.FilesModule.pickerMode = mode || 'dir';
        window.FilesModule.pickerCallback = id;
        window.FilesModule._scope = contentArea;
        window.FilesModule._getEl = function(sel){ return contentArea.querySelector(sel); };
        // Override _pickResult to close overlay instead of alert
        window.FilesModule._pickResult = function(path){
          closePicker();
          if(callback) callback(path || window.FilesModule.currentPath || '/');
        };
        if(window.FilesModule.destroy) window.FilesModule.destroy();
        if(window.FilesModule.init) window.FilesModule.init();
      }
      // Override picker actions to close overlay and call callback
      window._fmPick = function(){
        var p = window.FilesModule && window.FilesModule.currentPath || '/';
        closePicker();
        if(callback) callback(p);
      };
      window._fmCancel = function(){ closePicker(); };

      if(window.FilesModule){ doInit(); }
      else {
        var s=document.createElement('script');
        s.src='./static/pages/files.js?v=0603';
        s.onload=doInit;
        document.head.appendChild(s);
      }
    })
    .catch(function(e){
      contentArea.innerHTML = '<div style="color:var(--error);padding:40px;text-align:center">加载失败: '+e.message+'</div>';
    });
};

// ═══ 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();
  }
});