// Application Entry State
let currentPptId = "ppt1";
let currentSlideIndex = 0; // 0-indexed index inside the selected PPT's slides list
let searchIndex = [];

// DOM Elements
const menuItems = document.querySelectorAll(".menu-item");
const tabSections = document.querySelectorAll(".tab-section");
const tabTitleEl = document.getElementById("current-tab-title");
const tabSubtitleEl = document.getElementById("current-tab-subtitle");

const pptSelectEl = document.getElementById("ppt-select");
const slideThumbnailsEl = document.getElementById("slide-thumbnails");
const mainSlideImgEl = document.getElementById("main-slide-img");
const slideIndexIndicatorEl = document.getElementById("slide-index-indicator");
const btnPrevSlide = document.getElementById("btn-prev-slide");
const btnNextSlide = document.getElementById("btn-next-slide");
const slideTextLinesEl = document.getElementById("slide-text-lines");
const slideTakeawayEl = document.getElementById("slide-takeaway-points");
const btnFullscreen = document.getElementById("btn-fullscreen");

const lightroomEl = document.getElementById("lightroom");
const lightroomImgEl = document.getElementById("lightroom-img");
const btnCloseLightroom = document.getElementById("btn-close-lightroom");

// Calculator inputs
const sliderDepth = document.getElementById("slider-depth");
const sliderDist = document.getElementById("slider-dist");
const sliderVs = document.getElementById("slider-vs");
const sliderProcess = document.getElementById("slider-process");

const valDepth = document.getElementById("depth-val");
const valDist = document.getElementById("dist-val");
const valVs = document.getElementById("vs-val");
const valProcess = document.getElementById("process-val");

const calcLeadTimeEl = document.getElementById("calc-lead-time");
const calcWarningStatusEl = document.getElementById("calc-warning-status");
const txtBlindRadius = document.getElementById("blind-radius-txt");
const txtHypoDist = document.getElementById("hypo-dist-txt");
const blindZoneCanvas = document.getElementById("blind-zone-canvas");

// Search inputs
const searchInput = document.getElementById("search-input");
const searchResults = document.getElementById("search-results");

// Tab configuration
const tabMeta = {
  overview: { title: "知識庫總覽", subtitle: "展示台灣中央氣象署強震即時警報與 AI 技術整合之演進" },
  highlights: { title: "簡報精選精華", subtitle: "彙整四大簡報最關鍵的核心圖表與重要原理，支援一鍵定位簡報脈絡" },
  viewer: { title: "投影片展示", subtitle: "逐頁瀏覽 4 份核心簡報精華、提取文字與高畫質圖片" },
  calculator: { title: "預警盲區模擬", subtitle: "互動式物理參數計算，深入理解應變盲區與警報前置時間的幾何關係" },
  swarm: { title: "AI 代理協作", subtitle: "解析 2026 年 CWA 強震即時警報系統中多代理群組自動化閉環工作流" },
  lem: { title: "大型地震模型 (LEM)", subtitle: "介紹以 Wav2Vec 2.0 為基座演化的次世代地震自監督深度學習模型 SeisWav2Vec" },
  search: { title: "全文大綱搜尋", subtitle: "高效檢索四大簡報共 164 頁的文字內容，快速定位知識點" },
  downloads: { title: "簡報下載專區", subtitle: "查閱本地原始 PPTX 簡報大小與詳細檔案路徑資訊" }
};

// Initialize Application
window.addEventListener("DOMContentLoaded", () => {
  initNavigation();
  initSlideViewer();
  initCalculator();
  initSwarmVisualizer();
  initSearchEngine();
  initLightroom();
  initHighlights();
});

// 1. Navigation Controller
function initNavigation() {
  menuItems.forEach(item => {
    item.addEventListener("click", () => {
      const tabId = item.getAttribute("data-tab");
      
      // Update sidebar state
      menuItems.forEach(mi => mi.classList.remove("active"));
      item.classList.add("active");
      
      // Update viewport state
      tabSections.forEach(section => {
        section.classList.remove("active");
        if (section.id === `tab-${tabId}`) {
          section.classList.add("active");
        }
      });
      
      // Update header titles
      const meta = tabMeta[tabId] || { title: "展示平台", subtitle: "" };
      tabTitleEl.textContent = meta.title;
      tabSubtitleEl.textContent = meta.subtitle;
      
      // Special canvas re-draw on tab visibility
      if (tabId === "calculator") {
        setTimeout(drawBlindZone, 100);
      } else if (tabId === "swarm") {
        setTimeout(drawSwarm, 100);
      }
    });
  });
}

function jumpToTab(tabId) {
  const item = document.querySelector(`.menu-item[data-tab="${tabId}"]`);
  if (item) item.click();
}

function jumpToPresentation(pptId, slideNum = 1) {
  currentPptId = pptId;
  pptSelectEl.value = pptId;
  currentSlideIndex = slideNum - 1;
  renderSlidesList();
  jumpToTab("viewer");
}

// 2. Slide Showcase Controller
function initSlideViewer() {
  pptSelectEl.addEventListener("change", (e) => {
    currentPptId = e.target.value;
    currentSlideIndex = 0;
    renderSlidesList();
  });
  
  btnPrevSlide.addEventListener("click", () => {
    if (currentSlideIndex > 0) {
      currentSlideIndex--;
      updateActiveSlide();
    }
  });
  
  btnNextSlide.addEventListener("click", () => {
    const pptData = slidesData.find(p => p.id === currentPptId);
    if (pptData && currentSlideIndex < pptData.slides.length - 1) {
      currentSlideIndex++;
      updateActiveSlide();
    }
  });
  
  renderSlidesList();
}

function renderSlidesList() {
  const pptData = slidesData.find(p => p.id === currentPptId);
  if (!pptData) return;
  
  slideThumbnailsEl.innerHTML = "";
  pptData.slides.forEach((slide, idx) => {
    const thumb = document.createElement("div");
    thumb.className = `thumb-item ${idx === currentSlideIndex ? 'active' : ''}`;
    thumb.setAttribute("data-index", idx);
    
    // Find slide title or summary
    let titleStr = slide.title || (slide.text && slide.text[0]) || `Slide ${slide.slideNumber}`;
    if (titleStr.length > 22) {
      titleStr = titleStr.substring(0, 20) + "...";
    }
    
    thumb.innerHTML = `
      <span class="thumb-num">Slide ${slide.slideNumber}</span>
      <span class="thumb-title" title="${slide.title || ''}">${titleStr}</span>
    `;
    
    thumb.addEventListener("click", () => {
      currentSlideIndex = idx;
      updateActiveSlide();
    });
    
    slideThumbnailsEl.appendChild(thumb);
  });
  
  updateActiveSlide();
}

function updateActiveSlide() {
  const pptData = slidesData.find(p => p.id === currentPptId);
  if (!pptData) return;
  
  const slide = pptData.slides[currentSlideIndex];
  if (!slide) return;
  
  // Update main display image
  mainSlideImgEl.src = slide.image;
  
  // Highlight active thumbnail and scroll into view smoothly
  const thumbs = slideThumbnailsEl.querySelectorAll(".thumb-item");
  thumbs.forEach((t, idx) => {
    t.classList.remove("active");
    if (idx === currentSlideIndex) {
      t.classList.add("active");
      t.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
    }
  });
  
  // Update indicators
  slideIndexIndicatorEl.textContent = `Slide ${slide.slideNumber} / ${pptData.slidesCount}`;
  
  // Update disabled buttons
  btnPrevSlide.disabled = currentSlideIndex === 0;
  btnNextSlide.disabled = currentSlideIndex === pptData.slides.length - 1;
  
  // Render slide texts
  slideTextLinesEl.innerHTML = "";
  if (slide.text && slide.text.length > 0) {
    slide.text.forEach(line => {
      const li = document.createElement("li");
      li.textContent = line;
      slideTextLinesEl.appendChild(li);
    });
  } else {
    const li = document.createElement("li");
    li.textContent = "(此頁投影片無主要大綱文字，可能為全圖表展示)";
    li.style.color = "var(--text-dark)";
    li.style.fontStyle = "italic";
    slideTextLinesEl.appendChild(li);
  }
  
  // Generate key terms or takeaways dynamically based on slide content
  slideTakeawayEl.innerHTML = "";
  const takeaways = generateTakeaways(slide, pptData.id);
  takeaways.forEach(p => {
    const li = document.createElement("li");
    li.textContent = p;
    slideTakeawayEl.appendChild(li);
  });
}

function generateTakeaways(slide, pptId) {
  const points = [];
  const textJoined = (slide.text || []).join(" ").toLowerCase();
  const title = (slide.title || "").toLowerCase();
  
  if (pptId === "ppt1") {
    if (textJoined.includes("earthworm")) points.push("Earthworm：USGS 開源地震處理模組化系統，為全球實時監控基準。");
    if (textJoined.includes("seiscomp")) points.push("SeisComP：先進地震圖形界面與定位波相拾取平台。");
    if (textJoined.includes("grafana")) points.push("Grafana 觀測：即時視覺化海底觀測網水壓計、波形延遲及預警推播狀態。");
    if (textJoined.includes("ebear")) points.push("eBEAR：CWA 自行開發的 Earthworm Alert Reporting 自動速報系統。");
    if (textJoined.includes("docker")) points.push("容器化部署：CWA EEW 與 Seiscomp 已打包為 Docker 映像檔上傳 Docker Hub。");
  } else if (pptId === "ppt2") {
    if (textJoined.includes("pws")) points.push("PWS：災防告警細胞廣播發布範疇統計（如 M6.1 地震第一報與第二報範圍）。");
    if (textJoined.includes("幾何中心")) points.push("定位法：幾何中心法在早期預警解算中對震央與震度有誤差修正之探討。");
    if (textJoined.includes("盲區") || textJoined.includes("應變")) points.push("應變盲區：最快解算耗時乘以 S 波平均波速（3.5 km/s），該範圍內無警報前置時間。");
    if (textJoined.includes("觸發")) points.push("測站觸發率：針對特定震源以半徑搜索，排除共站干擾計算實時觸發比例。");
  } else if (pptId === "ppt3") {
    if (textJoined.includes("agent") || textJoined.includes("代理")) points.push("AI Agent Swarm：my_agent, seismo, seismo_agent, secondary_agent 四協同代理職責分工。");
    if (textJoined.includes("wav2vec") || textJoined.includes("lem")) points.push("SeisWav2Vec 2.0：對比學習 Wav2Vec 結構遷移至地震波形，自監督預訓練模型。");
    if (textJoined.includes("transformer")) points.push("Transformer 上下文：12 層注意力機制學習特徵的全局上下文，無標記資料自學習。");
    if (textJoined.includes("telegram")) points.push("Telegram 通訊：整合 my_agent 自動推送 eew_health、異常日誌及 daily_report。");
  } else if (pptId === "ppt4") {
    if (textJoined.includes("p波") || textJoined.includes("s波")) points.push("強震預警原理：利用傳播快速的 P 縱波推算震級，趕在破壞性 S 橫波抵達前告警。");
    if (textJoined.includes("電視") || textJoined.includes("推播")) points.push("多元傳播管道：國家級警報、電視台即時插播、中小學預警軟體及手機 APP 四大網絡。");
    if (textJoined.includes("花蓮")) points.push("花蓮 M7.2 案例：回顧強震預警警報實際發送實例、各縣市震度與警報時效。");
  }
  
  if (points.length === 0) {
    points.push("地震預警核心知識：解析地震波傳播時序與即時資料串流。");
    points.push("技術重點：結合自動化解算模型，縮減預警盲區以求減災。");
  }
  
  return points;
}

// 3. Lightroom Lightbox Modal
function initLightroom() {
  mainSlideImgEl.addEventListener("click", () => {
    lightroomImgEl.src = mainSlideImgEl.src;
    lightroomEl.style.display = "flex";
  });
  
  lightroomEl.addEventListener("click", () => {
    lightroomEl.style.display = "none";
  });
  
  btnCloseLightroom.addEventListener("click", (e) => {
    e.stopPropagation();
    lightroomEl.style.display = "none";
  });
}

// 4. Blind Zone & Lead Time Warning Simulator
function initCalculator() {
  const updateCalculator = () => {
    const depth = parseFloat(sliderDepth.value);
    const dist = parseFloat(sliderDist.value);
    const vs = parseFloat(sliderVs.value);
    const processTime = parseFloat(sliderProcess.value);
    
    // Display value update
    valDepth.textContent = `${depth} km`;
    valDist.textContent = `${dist} km`;
    valVs.textContent = `${vs.toFixed(1)} km/s`;
    valProcess.textContent = `${processTime.toFixed(1)} s`;
    
    // Geometry math
    const hypoDist = Math.sqrt(dist*dist + depth*depth);
    const sTravelTime = hypoDist / vs;
    const leadTime = sTravelTime - processTime;
    
    // Blind zone radius (ground distance when S-wave wavefront intersects ground surface at the processing time)
    // S-wave path distance at processing time: s_path = processTime * vs
    // If path is less than focal depth, S-wave hasn't even reached the ground surface directly above epicenter.
    let blindRadius = 0;
    const sPath = processTime * vs;
    if (sPath > depth) {
      blindRadius = Math.sqrt(sPath*sPath - depth*depth);
    }
    
    // Render text
    txtHypoDist.textContent = `${hypoDist.toFixed(1)} km`;
    txtBlindRadius.textContent = blindRadius > 0 ? `${blindRadius.toFixed(1)} km` : "0 km (未傳抵地表)";
    
    if (leadTime > 0) {
      calcLeadTimeEl.innerHTML = `${leadTime.toFixed(1)}<span>秒</span>`;
      calcLeadTimeEl.style.color = "var(--accent-cyan)";
      calcWarningStatusEl.textContent = "警報覆蓋安全區";
      calcWarningStatusEl.className = "warning-status-alert status-safe";
    } else {
      calcLeadTimeEl.innerHTML = `0.0<span>秒</span>`;
      calcLeadTimeEl.style.color = "var(--accent-rose)";
      calcWarningStatusEl.textContent = "處於預警盲區內";
      calcWarningStatusEl.className = "warning-status-alert status-blind";
    }
    
    // Save to window state for canvas redraw
    window.calcState = { depth, dist, vs, processTime, hypoDist, blindRadius, leadTime };
    drawBlindZone();
  };
  
  sliderDepth.addEventListener("input", updateCalculator);
  sliderDist.addEventListener("input", updateCalculator);
  sliderVs.addEventListener("input", updateCalculator);
  sliderProcess.addEventListener("input", updateCalculator);
  
  updateCalculator();
}

function drawBlindZone() {
  const canvas = blindZoneCanvas;
  if (!canvas) return;
  const ctx = canvas.getContext("2d");
  
  // Set resolution based on DPI
  const dpr = window.devicePixelRatio || 1;
  const rect = canvas.getBoundingClientRect();
  canvas.width = rect.width * dpr;
  canvas.height = rect.height * dpr;
  ctx.scale(dpr, dpr);
  
  const w = rect.width;
  const h = rect.height;
  ctx.clearRect(0, 0, w, h);
  
  const state = window.calcState;
  if (!state) return;
  
  // Drawing coordinates mapping
  // Earth surface is a horizontal line at y = 100
  const ySurface = 80;
  // Center is epicenter at x = w / 2 - 100
  const xEpicenter = w / 2 - 80;
  
  // Scale pixels: 1 km = 2 pixels
  const scale = 2.0;
  
  // Draw Earth crust layer
  ctx.fillStyle = "rgba(10, 15, 26, 0.4)";
  ctx.fillRect(0, ySurface, w, h - ySurface);
  
  // Draw ground line
  ctx.strokeStyle = "#475569";
  ctx.lineWidth = 2;
  ctx.beginPath();
  ctx.moveTo(0, ySurface);
  ctx.lineTo(w, ySurface);
  ctx.stroke();
  
  // Epicenter
  ctx.fillStyle = "#94a3b8";
  ctx.beginPath();
  ctx.arc(xEpicenter, ySurface, 4, 0, 2*Math.PI);
  ctx.fill();
  
  // Hypocenter (Earthquake Focus)
  const yFocus = ySurface + state.depth * scale;
  ctx.fillStyle = "var(--accent-rose)";
  ctx.beginPath();
  ctx.arc(xEpicenter, yFocus, 6, 0, 2*Math.PI);
  ctx.fill();
  
  // Glow for Hypocenter
  const gradientFocus = ctx.createRadialGradient(xEpicenter, yFocus, 2, xEpicenter, yFocus, 18);
  gradientFocus.addColorStop(0, "rgba(244, 63, 94, 0.6)");
  gradientFocus.addColorStop(1, "rgba(244, 63, 94, 0)");
  ctx.fillStyle = gradientFocus;
  ctx.beginPath();
  ctx.arc(xEpicenter, yFocus, 18, 0, 2*Math.PI);
  ctx.fill();
  
  // Target Station (user epicenter distance)
  const xStation = xEpicenter + state.dist * scale;
  ctx.fillStyle = state.leadTime > 0 ? "var(--accent-cyan)" : "var(--accent-rose)";
  ctx.beginPath();
  ctx.arc(xStation, ySurface, 5, 0, 2*Math.PI);
  ctx.fill();
  
  // Label for target
  ctx.fillStyle = "white";
  ctx.font = "bold 11px sans-serif";
  ctx.fillText("目標觀測點", xStation - 25, ySurface - 12);
  
  // Wavefront propagation circle
  // S-wave wavefront path distance
  const rSwave = state.processTime * state.vs * scale;
  ctx.strokeStyle = "rgba(245, 158, 11, 0.4)";
  ctx.lineWidth = 1.5;
  ctx.setLineDash([4, 3]);
  ctx.beginPath();
  ctx.arc(xEpicenter, yFocus, rSwave, 0, 2*Math.PI);
  ctx.stroke();
  ctx.setLineDash([]);
  
  // P-wave wavefront path (approx 1.73x faster than S-wave)
  const rPwave = state.processTime * state.vs * 1.73 * scale;
  ctx.strokeStyle = "rgba(6, 182, 212, 0.25)";
  ctx.lineWidth = 1;
  ctx.beginPath();
  ctx.arc(xEpicenter, yFocus, rPwave, 0, 2*Math.PI);
  ctx.stroke();
  
  // Shaded Blind Zone on surface
  const rBlindPx = state.blindRadius * scale;
  if (rBlindPx > 0) {
    ctx.fillStyle = "rgba(244, 63, 94, 0.15)";
    ctx.fillRect(xEpicenter - rBlindPx, ySurface, rBlindPx * 2, h - ySurface);
    
    // Draw surface indicator for blind zone
    ctx.strokeStyle = "var(--accent-rose)";
    ctx.lineWidth = 3;
    ctx.beginPath();
    ctx.moveTo(xEpicenter - rBlindPx, ySurface);
    ctx.lineTo(xEpicenter + rBlindPx, ySurface);
    ctx.stroke();
    
    // Blind Zone Label
    ctx.fillStyle = "var(--accent-rose)";
    ctx.font = "bold 11px sans-serif";
    ctx.fillText(`預警盲區半徑: ${state.blindRadius.toFixed(1)} km`, xEpicenter - 65, ySurface + 24);
  }
  
  // S-wave wavefront intersection with ground
  ctx.fillStyle = "var(--accent-amber)";
  const intersectDist = state.processTime * state.vs;
  if (intersectDist > state.depth) {
    const xIntersectLeft = xEpicenter - rBlindPx;
    const xIntersectRight = xEpicenter + rBlindPx;
    ctx.beginPath();
    ctx.arc(xIntersectLeft, ySurface, 4, 0, 2*Math.PI);
    ctx.arc(xIntersectRight, ySurface, 4, 0, 2*Math.PI);
    ctx.fill();
  }
  
  // Draw ray from Hypocenter to target station
  ctx.strokeStyle = "rgba(255, 255, 255, 0.15)";
  ctx.lineWidth = 1;
  ctx.beginPath();
  ctx.moveTo(xEpicenter, yFocus);
  ctx.lineTo(xStation, ySurface);
  ctx.stroke();
  
  // Annotations
  ctx.fillStyle = "var(--text-dark)";
  ctx.font = "10px sans-serif";
  ctx.fillText("震央 (Epicenter)", xEpicenter + 8, ySurface - 12);
  
  ctx.fillStyle = "var(--accent-rose)";
  ctx.fillText(`震源 (Hypocenter) Depth: ${state.depth} km`, xEpicenter + 12, yFocus + 4);
}

// 5. AI Agent Swarm network visualizer
function initSwarmVisualizer() {
  const swarmCanvas = document.getElementById("agent-swarm-canvas");
  if (!swarmCanvas) return;
  
  // Node details
  const agentNodes = [
    { id: "my_agent", name: "my_agent", role: "預警總管", color: "var(--accent-emerald)", bg: "var(--accent-emerald-glow)", x: 200, y: 120, r: 48, desc: "主控監測流程，定時健康檢查 (eew_health cron)。判讀並處理異常事件，異常時透過 Telegram 主動發送告警，並彙整所有 agent 資訊產出每日簡報日報 (eew_report_daily)。" },
    { id: "seismo", name: "seismo", role: "數據前向轉發", color: "var(--accent-blue)", bg: "var(--accent-blue-glow)", x: 450, y: 120, r: 42, desc: "維持持續運行的心跳循環 (heartbeat loop)，即時偵測及提取中央氣象署 EEW 流程產生的最新地震 `.rep` 報告原始檔，將資料進行結構化轉換輸出 (轉為 JSON/CSV)。" },
    { id: "seismo_agent", name: "seismo_agent", role: "地震學分析助教", color: "var(--accent-amber)", bg: "var(--accent-amber-glow)", x: 450, y: 320, r: 42, desc: "負責科學數據分析與處理流水線。解析速報效能與測站延遲統計，呼叫自動繪圖模組繪製事件散佈圖與序列圖，同時儲存備份二進位原始數據檔。" },
    { id: "secondary_agent", name: "secondary_agent", role: "系統整合工程師", color: "var(--accent-rose)", bg: "var(--accent-rose-glow)", x: 200, y: 320, r: 48, desc: "本地調度與訊息轉發中心。負責部署與維護容器重啟腳本 (eew_fault_recovery.sh)、Cron 排程及 Telegram 機器人核心，負責在 my_agent 要求時調用 delegate_task 指派任務。" }
  ];
  
  const links = [
    { from: "seismo", to: "secondary_agent", label: "地震.rep JSON 輸出" },
    { from: "secondary_agent", to: "seismo_agent", label: "分發科研分析與繪圖" },
    { from: "seismo_agent", to: "my_agent", label: "回傳延遲時效日報" },
    { from: "my_agent", to: "secondary_agent", label: "調度容器故障重啟" },
    { from: "seismo", to: "my_agent", label: "心跳狀態報告" }
  ];
  
  let selectedNodeId = "my_agent";
  
  const updateSwarmOverlay = (node) => {
    document.getElementById("agent-overlay-name").textContent = node.name;
    document.getElementById("agent-overlay-role").textContent = node.role;
    document.getElementById("agent-overlay-role").style.backgroundColor = node.bg;
    document.getElementById("agent-overlay-role").style.color = node.color;
    document.getElementById("agent-overlay-desc").textContent = node.desc;
    document.getElementById("agent-overlay-icon").style.color = node.color;
    document.getElementById("agent-overlay-icon").style.backgroundColor = node.bg;
  };
  
  window.drawSwarm = () => {
    const dpr = window.devicePixelRatio || 1;
    const rect = swarmCanvas.getBoundingClientRect();
    swarmCanvas.width = rect.width * dpr;
    swarmCanvas.height = rect.height * dpr;
    const ctx = swarmCanvas.getContext("2d");
    ctx.scale(dpr, dpr);
    
    const w = rect.width;
    const h = rect.height;
    ctx.clearRect(0, 0, w, h);
    
    // Set node positions dynamically centered to canvas
    const xCenter = w / 2;
    const yCenter = h / 2 - 40;
    
    // Re-adjust node coordinates relative to canvas center
    agentNodes[0].x = xCenter - 150; agentNodes[0].y = yCenter - 80;
    agentNodes[1].x = xCenter + 150; agentNodes[1].y = yCenter - 80;
    agentNodes[2].x = xCenter + 150; agentNodes[2].y = yCenter + 120;
    agentNodes[3].x = xCenter - 150; agentNodes[3].y = yCenter + 120;
    
    // Draw Links
    links.forEach(l => {
      const fromNode = agentNodes.find(n => n.id === l.from);
      const toNode = agentNodes.find(n => n.id === l.to);
      if (!fromNode || !toNode) return;
      
      ctx.strokeStyle = "rgba(148, 163, 184, 0.15)";
      ctx.lineWidth = 2;
      ctx.beginPath();
      ctx.moveTo(fromNode.x, fromNode.y);
      ctx.lineTo(toNode.x, toNode.y);
      ctx.stroke();
      
      // Draw dynamic animated pulse dot on links
      const speed = 0.001;
      const t = (Date.now() * speed) % 1;
      const dotX = fromNode.x + (toNode.x - fromNode.x) * t;
      const dotY = fromNode.y + (toNode.y - fromNode.y) * t;
      ctx.fillStyle = "var(--accent-cyan)";
      ctx.beginPath();
      ctx.arc(dotX, dotY, 4, 0, 2*Math.PI);
      ctx.fill();
    });
    
    // Draw Nodes
    agentNodes.forEach(node => {
      const isSelected = node.id === selectedNodeId;
      
      // Glowing shadow
      if (isSelected) {
        ctx.shadowColor = node.color;
        ctx.shadowBlur = 15;
      }
      
      // Node fill
      ctx.fillStyle = "rgba(10, 15, 26, 0.9)";
      ctx.strokeStyle = isSelected ? "white" : node.color;
      ctx.lineWidth = isSelected ? 3 : 1.5;
      ctx.beginPath();
      ctx.arc(node.x, node.y, node.r, 0, 2*Math.PI);
      ctx.fill();
      ctx.stroke();
      
      // Reset shadow
      ctx.shadowBlur = 0;
      
      // Text
      ctx.fillStyle = "white";
      ctx.font = "bold 12px sans-serif";
      ctx.textAlign = "center";
      ctx.fillText(node.name, node.x, node.y - 4);
      
      ctx.fillStyle = node.color;
      ctx.font = "10px sans-serif";
      ctx.fillText(node.role, node.x, node.y + 14);
    });
  };
  
  // Click handler
  swarmCanvas.addEventListener("click", (e) => {
    const rect = swarmCanvas.getBoundingClientRect();
    const x = e.clientX - rect.left;
    const y = e.clientY - rect.top;
    
    // Check if clicked node
    for (let node of agentNodes) {
      const dist = Math.sqrt((x - node.x)**2 + (y - node.y)**2);
      if (dist <= node.r) {
        selectedNodeId = node.id;
        updateSwarmOverlay(node);
        drawSwarm();
        break;
      }
    }
  });
  
  // Animation loop for swarm
  let animId;
  const loop = () => {
    if (document.getElementById("tab-swarm").classList.contains("active")) {
      drawSwarm();
    }
    animId = requestAnimationFrame(loop);
  };
  loop();
  
  // Select default node
  updateSwarmOverlay(agentNodes[0]);
}

// 6. Search Engine Controller
function initSearchEngine() {
  // Build slide index
  searchIndex = [];
  slidesData.forEach(ppt => {
    ppt.slides.forEach(slide => {
      searchIndex.push({
        pptId: ppt.id,
        pptTitle: ppt.title,
        slideNumber: slide.slideNumber,
        title: slide.title || "",
        textLines: slide.text || [],
        image: slide.image
      });
    });
  });
  
  searchInput.addEventListener("input", (e) => {
    const query = e.target.value.toLowerCase().trim();
    if (!query) {
      searchResults.innerHTML = `
        <div class="no-results-view">
          <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5">
            <circle cx="11" cy="11" r="8"/><line x1="21" y1="21" x2="16.65" y2="16.65"/><line x1="8" y1="11" x2="14" y2="11"/>
          </svg>
          <p style="font-size: 14px; font-weight: 600;">請輸入關鍵字以檢索四大簡報共 164 頁的文字大綱</p>
        </div>
      `;
      return;
    }
    
    const matches = searchIndex.filter(item => {
      const matchTitle = item.title.toLowerCase().includes(query);
      const matchPptTitle = item.pptTitle.toLowerCase().includes(query);
      const matchLines = item.textLines.some(line => line.toLowerCase().includes(query));
      return matchTitle || matchPptTitle || matchLines;
    });
    
    if (matches.length === 0) {
      searchResults.innerHTML = `
        <div class="no-results-view">
          <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5">
            <circle cx="12" cy="12" r="10"/><line x1="15" y1="9" x2="9" y2="15"/><line x1="9" y1="9" x2="15" y2="15"/>
          </svg>
          <p style="font-size: 14px; font-weight: 600;">未找到任何相符的投影片內容</p>
          <p style="font-size: 12px; color: var(--text-dark); margin-top: 4px;">請試著搜尋其他字眼（如：Earthworm, Grafana, 盲區, 代理）</p>
        </div>
      `;
      return;
    }
    
    searchResults.innerHTML = "";
    matches.forEach(item => {
      const card = document.createElement("div");
      card.className = "glass-panel card-padding search-result-card";
      
      // Highlight matching snippet
      let snippet = "";
      const matchingLine = item.textLines.find(line => line.toLowerCase().includes(query));
      if (matchingLine) {
        snippet = matchingLine;
      } else if (item.textLines.length > 0) {
        snippet = item.textLines[0];
      }
      
      // Highlight text snippet helper
      const queryIdx = snippet.toLowerCase().indexOf(query);
      if (queryIdx !== -1 && query.length > 0) {
        const start = snippet.substring(0, queryIdx);
        const match = snippet.substring(queryIdx, queryIdx + query.length);
        const end = snippet.substring(queryIdx + query.length);
        snippet = `${start}<mark style="background-color: rgba(6, 182, 212, 0.4); color: white; border-radius: 2px; padding: 0 2px;">${match}</mark>${end}`;
      }
      
      card.innerHTML = `
        <div class="result-image-box">
          <img src="${item.image}" alt="Slide Thumb">
        </div>
        <div class="result-content-box">
          <div class="result-meta">${item.pptTitle} · 第 ${item.slideNumber} 頁</div>
          <div class="result-title">${item.title || '(無標題)'}</div>
          <div class="result-snippet">${snippet}</div>
        </div>
      `;
      
      card.addEventListener("click", () => {
        jumpToPresentation(item.pptId, item.slideNumber);
      });
      
      searchResults.appendChild(card);
    });
  });
}

// 7. Key Highlights Section Controller
const highlightsData = [
  {
    pptId: "ppt1",
    slideNum: 6,
    category: "network",
    title: "中央氣象署即時地震觀測網分佈",
    description: "展示臺灣陸地與海域鋪設的極其密集的觀測網。包含強震儀站點與鋪設於東部海域、南部海域的 OBS 海底電纜觀測系統，是提供即時測報之根本基礎。",
    keyPoints: ["島內密集陸地強震儀分佈", "東部與南部海纜觀測系統 (OBS)", "即時連續訊號在發震數秒內傳達中心"]
  },
  {
    pptId: "ppt1",
    slideNum: 11,
    category: "network",
    title: "實時地震波形歸檔整合數據流",
    description: "展示 Earthworm 處理器如何透過共享記憶體 RING，將 Field Stations 的資料利用 tbuf2mseed 模組壓縮，並同步保存至本機 NAS，確保高可靠度與極低資料延遲。",
    keyPoints: ["共享記憶體 (Shared Memory) 機制", "支援跨網絡與跨節點資料交換", "Docker 容器化保證部署彈性"]
  },
  {
    pptId: "ppt1",
    slideNum: 12,
    category: "network",
    title: "eBEAR 自動化強震即時警報軟體",
    description: "CWA 自主開發的 eBEAR (Earthworm Based Earthquake Alert Reporting) 系統，已封裝成 Docker Image 並提供在 Docker Hub 下載，具備模組化警報回報流程。",
    keyPoints: ["Docker Hub: cwadayi/earthworm_ubuntu22.04_eew:v1", "高整合性的地震波相拾取與規模演算", "支援自動化的警報派遣與日誌紀錄"]
  },
  {
    pptId: "ppt2",
    slideNum: 2,
    category: "eew",
    title: "2026年5月 強震即時警報系統 (EEW) 效能",
    description: "彙整 2026 年 5 月份 EEW 的統計數據。最快解算時效達到驚人的 9.7 秒，PWS 細胞廣播發送 6 次，展示了防減災技術在即時解算上的優異成果。",
    keyPoints: ["5月份地震預警最速時效達 9.7 秒", "PWS 發布 6 次，電視台即時插播 6 次", "對外通報管道觸發穩定，無漏報異常"]
  },
  {
    pptId: "ppt2",
    slideNum: 14,
    category: "eew",
    title: "應變盲區 (Blind Zone) 與 S 波幾何學",
    description: "地震發生後，P 波與 S 波以球形向外傳播。在系統花費時間解算並發送警報前，S 波已波及的範圍（半徑 = 解算時間 × S波速度）即為預警盲區，此區域內前置時間為零。",
    keyPoints: ["盲區半徑 = 解算時間 (s) × S波速度 (3.5km/s)", "極淺地震（如大埔或美濃）的震央周圍多位於盲區內", "加速測站密集度與算法能有效縮小盲區"]
  },
  {
    pptId: "ppt2",
    slideNum: 15,
    category: "eew",
    title: "測站觸發率 (Trigger Rate) 半徑篩選",
    description: "以定位震央為中心、事件最遠觸發測站為半徑作圓，評估該圓形範圍內觀測網測站觸發率，排除共站造成的比率偏低誤差，是評估觀測網效能的關鍵指標。",
    keyPoints: ["速報震央為圓心，最遠觸發測站為半徑作圓", "剔除重複計算共站，反映真實觀測網覆蓋", "輔助評估密集強震時之儀器健康度"]
  },
  {
    pptId: "ppt3",
    slideNum: 4,
    category: "history",
    title: "臺灣過去 10 年災害性地震損失統計",
    description: "展示臺灣過去 10 年內數次引發嚴重災情之強震（包括美濃、花蓮、池上、大埔地震等），凸顯了台灣極高地震風險性與建立次世代預警系統的迫切性。",
    keyPoints: ["美濃地震維冠大樓塌陷、花蓮地震統帥飯店受災", "高鐵與捷運在預警下成功採取減速避災措施", "災害地震平均每 30-40 年發生一次"]
  },
  {
    pptId: "ppt3",
    slideNum: 44,
    category: "ai",
    title: "大型地震模型 LEM 與 SeisWav2Vec 2.0",
    description: "介紹將 Wav2Vec 2.0 語音自監督模型遷移至地震波形特徵提取之架構。由一維 CNN 編碼器與 12 層 Transformer 構成，從無標記波形中自主學習震波語意特徵。",
    keyPoints: ["自監督學習 (SSL) 無需人工標註海量資料", "Wav2Vec 離散向量量化與 Mask 遮罩學習", "微調後於波相辨識精度與噪訊過濾上顯著提升"]
  },
  {
    pptId: "ppt3",
    slideNum: 50,
    category: "ai",
    title: "EEW Swarm 四位 Agent 角色與職責矩陣",
    description: "次世代地震系統中四個協同 Agents 的核心分工矩陣：包含主助理、科學前向轉發工程師、地震分析學助教與本地排程容器整合工程師，建構多代理人體系。",
    keyPoints: ["my_agent、seismo、seismo_agent、secondary_agent", "實現跨系統的多代理協調派遣", "個別 Agent 維持獨立的指令執行環境與日誌監控"]
  },
  {
    pptId: "ppt3",
    slideNum: 54,
    category: "ai",
    title: "EEW 代理群多模組自動化閉環工作流",
    description: "當系統產出新事件的 `.rep` 報告後，自動觸發 seismo 解析資料、seismo_agent 繪製散佈圖、secondary_agent 協調排程、最後由 my_agent 生成簡報推播至 Telegram 的自動化流向圖。",
    keyPoints: ["事件驅動 (Event-driven) 觸發運行", "Telegram API 即時回報與 eew_fault_recovery 恢復功能", "全流程無人工介入，秒級產出簡報與日報"]
  },
  {
    pptId: "ppt4",
    slideNum: 18,
    category: "eew",
    title: "強震即時警報物理原理 (P/S 波速差)",
    description: "圖解地震產生之 P 縱波 (速度快) 與 S 橫波 (破壞大、速度慢) 的傳播物理機制。利用兩者速度差，可在 S 波抵達前數秒解算位置並以電磁波速度搶先警報。",
    keyPoints: ["P波波速約 6 km/s，S波波速約 3.5 km/s", "電磁波傳輸警報以光速前進，遠快於地震波", "提供關鍵數秒至數十秒避難避險前置時間"]
  },
  {
    pptId: "ppt4",
    slideNum: 21,
    category: "history",
    title: "2024/04/03 M7.2 花蓮大地震國家級警報實況",
    description: "回顧花蓮強震當日預警系統運行狀況，說明系統於極短時間內完成解算，並透過細胞廣播 (PWS)、電視插播與中小學防震系統即時推送警報的實際情境。",
    keyPoints: ["全台多個縣市獲得寶貴避險前置時間", "電視台實時彈出插播覆蓋全螢幕", "分析極震區盲區覆蓋以及大眾運輸系統防災減速反應"]
  }
];

function initHighlights() {
  const container = document.getElementById("highlights-container");
  const filterButtons = document.querySelectorAll(".filter-btn");
  if (!container) return;

  const renderHighlights = (catFilter) => {
    container.innerHTML = "";
    
    const filtered = catFilter === "all" 
      ? highlightsData 
      : highlightsData.filter(h => h.category === catFilter);
      
    filtered.forEach(h => {
      const card = document.createElement("div");
      card.className = "glass-panel";
      card.style.display = "flex";
      card.style.flexDirection = "column";
      card.style.overflow = "hidden";
      
      const slideImgPath = `slides/${h.pptId}/slide_${h.slideNum}.png`;
      
      // Category tag display
      const catLabels = { network: "觀測架構", eew: "預警效能", ai: "AI與代理人", history: "地震與案例" };
      const catLabel = catLabels[h.category] || h.category;
      
      card.innerHTML = `
        <div style="position: relative; width: 100%; padding-top: 56.25%; background: #020408; border-bottom: 1px solid var(--card-border); overflow: hidden; display: flex; align-items: center; justify-content: center;">
          <img src="${slideImgPath}" alt="${h.title}" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: contain; cursor: zoom-in; padding: 4px;" class="highlight-img-click">
          <span style="position: absolute; top: 12px; left: 12px; background: rgba(10, 15, 26, 0.85); border: 1px solid var(--card-border); padding: 4px 10px; border-radius: 6px; font-size: 11px; font-weight: 700; color: var(--accent-cyan); font-family: var(--font-mono);">
            ${h.pptId.toUpperCase()} · Slide ${h.slideNum}
          </span>
          <span style="position: absolute; bottom: 12px; right: 12px; background: rgba(59, 130, 246, 0.15); border: 1px solid rgba(59, 130, 246, 0.2); padding: 3px 8px; border-radius: 4px; font-size: 10.5px; font-weight: bold; color: #60a5fa;">
            ${catLabel}
          </span>
        </div>
        <div style="padding: 20px; flex: 1; display: flex; flex-direction: column; gap: 12px;">
          <h4 style="font-size: 15px; font-weight: 800; color: white; line-height: 1.4;">${h.title}</h4>
          <p style="font-size: 12.5px; color: var(--text-muted); line-height: 1.6; flex: 1;">${h.description}</p>
          <ul style="list-style: none; margin-top: 6px; display: flex; flex-direction: column; gap: 6px;">
            ${h.keyPoints.map(pt => `
              <li style="font-size: 12px; color: var(--text-dark); position: relative; padding-left: 14px; line-height: 1.5;">
                <span style="position: absolute; left: 0; top: 5px; width: 4px; height: 4px; border-radius: 50%; background-color: var(--accent-cyan);"></span>
                ${pt}
              </li>
            `).join("")}
          </ul>
        </div>
        <div style="border-top: 1px solid rgba(255, 255, 255, 0.05); padding: 12px 20px; display: flex; justify-content: flex-end; background: rgba(8, 12, 20, 0.2);">
          <button class="view-btn jump-to-slide-btn" data-ppt="${h.pptId}" data-slide="${h.slideNum}">
            定位至簡報
            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5"><polyline points="9 18 15 12 9 6"/></svg>
          </button>
        </div>
      `;
      
      // Lightbox click handler
      card.querySelector(".highlight-img-click").addEventListener("click", () => {
        lightroomImgEl.src = slideImgPath;
        lightroomEl.style.display = "flex";
      });
      
      // Slide Jump click handler
      card.querySelector(".jump-to-slide-btn").addEventListener("click", () => {
        jumpToPresentation(h.pptId, h.slideNum);
      });
      
      container.appendChild(card);
    });
  };

  // Filter Buttons binding
  filterButtons.forEach(btn => {
    btn.addEventListener("click", () => {
      filterButtons.forEach(b => {
        b.classList.remove("active-filter");
        b.style.background = "";
        b.style.borderColor = "";
      });
      
      btn.classList.add("active-filter");
      btn.style.background = "var(--accent-cyan-glow)";
      btn.style.borderColor = "var(--accent-cyan)";
      
      const filterCat = btn.getAttribute("data-filter-cat");
      renderHighlights(filterCat);
    });
  });

  // Initial render
  renderHighlights("all");
}