// tour.js — SiPakarTebu Onboarding Tour
const tourSteps = [
  {
    title: "Selamat datang di SiPakarTebu! 🌱",
    desc: "Ini adalah panduan singkat untuk membantu kamu memahami fitur-fitur utama aplikasi.",
    target: null,
  },
  {
    title: "Menu Navigasi",
    desc: "Gunakan menu di sebelah kiri untuk berpindah antar halaman: Dashboard, Diagnosa, Riwayat, Kamus, dan Profil.",
    target: "#sidebar",
    pos: "right",
  },
  {
    title: "Statistik Kamu",
    desc: "Ringkasan total diagnosa yang sudah kamu lakukan dan akurasi rata-rata model.",
    target: ".stat-cards",
    pos: "bottom",
  },
  {
    title: "Grafik Diagnosa",
    desc: "Grafik ini menunjukkan aktivitas diagnosamu per bulan sepanjang tahun.",
    target: ".chart-container",
    pos: "top",
  },
  {
    title: "Mulai Diagnosa Baru",
    desc: "Klik menu Diagnosa untuk memulai diagnosa penyakit tebu. Unggah foto dan dapatkan hasilnya!",
    target: "#nav-diagnosa",
    pos: "right",
  },
];

let tourCurrent = 0;

function createTourOverlay() {
  const overlay = document.createElement("div");
  overlay.id = "tour-overlay";
  overlay.style.cssText = `
    position: fixed; inset: 0; z-index: 9999;
    pointer-events: none;
  `;
  document.body.appendChild(overlay);
  return overlay;
}

function createTooltip() {
  const el = document.createElement("div");
  el.id = "tour-tooltip";
  el.style.cssText = `
    position: fixed; z-index: 10000;
    background: #fff; border-radius: 14px;
    padding: 20px 22px; width: 280px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.22);
    pointer-events: auto;
    font-family: inherit;
  `;
  document.body.appendChild(el);
  return el;
}

function createHighlight() {
  const el = document.createElement("div");
  el.id = "tour-highlight";
  el.style.cssText = `
    position: fixed; z-index: 9998;
    border: 2.5px solid #2e7d52;
    border-radius: 10px;
    pointer-events: none;
    transition: all 0.35s ease;
    box-shadow: 0 0 0 9999px rgba(0,0,0,0.50);
  `;
  document.body.appendChild(el);
  return el;
}

function renderTourStep() {
  const step = tourSteps[tourCurrent];
  const total = tourSteps.length;

  const highlight = document.getElementById("tour-highlight");
  const tooltip = document.getElementById("tour-tooltip");

  // Highlight target element
  if (step.target) {
    const target = document.querySelector(step.target);
    if (target) {
      const r = target.getBoundingClientRect();
      const pad = 8;
      highlight.style.display = "block";
      highlight.style.top = (r.top - pad) + "px";
      highlight.style.left = (r.left - pad) + "px";
      highlight.style.width = (r.width + pad * 2) + "px";
      highlight.style.height = (r.height + pad * 2) + "px";

      // Position tooltip near target
      if (step.pos === "right") {
        tooltip.style.top = r.top + "px";
        tooltip.style.left = (r.right + 16) + "px";
      } else if (step.pos === "bottom") {
        tooltip.style.top = (r.bottom + 16) + "px";
        tooltip.style.left = Math.max(16, r.left) + "px";
      } else if (step.pos === "top") {
        tooltip.style.top = (r.top - 200) + "px";
        tooltip.style.left = Math.max(16, r.left) + "px";
      } else {
        tooltip.style.top = "50%";
        tooltip.style.left = "50%";
        tooltip.style.transform = "translate(-50%, -50%)";
      }
    }
  } else {
    highlight.style.display = "none";
    tooltip.style.top = "50%";
    tooltip.style.left = "50%";
    tooltip.style.transform = "translate(-50%, -50%)";
  }

  const dots = Array.from({ length: total }, (_, i) =>
    `<div style="width:${i === tourCurrent ? 16 : 6}px;height:6px;border-radius:3px;
     background:${i === tourCurrent ? "#2e7d52" : "#ddd"};
     transition:all 0.3s;"></div>`
  ).join("");

  tooltip.innerHTML = `
    <div style="font-size:11px;color:#2e7d52;font-weight:600;text-transform:uppercase;
      letter-spacing:0.8px;margin-bottom:6px;">
      Langkah ${tourCurrent + 1} dari ${total}
    </div>
    <div style="font-size:15px;font-weight:600;color:#1a2f1a;margin-bottom:6px;">
      ${step.title}
    </div>
    <div style="font-size:13px;color:#555;line-height:1.6;margin-bottom:16px;">
      ${step.desc}
    </div>
    <div style="display:flex;align-items:center;justify-content:space-between;">
      <div style="display:flex;gap:5px;align-items:center;">${dots}</div>
      <div style="display:flex;gap:10px;align-items:center;">
        <button onclick="endTour()" style="background:none;border:none;
          font-size:12px;color:#999;cursor:pointer;">Lewati</button>
        <button onclick="tourNext()" style="background:#2e7d52;color:#fff;border:none;
          padding:8px 16px;border-radius:8px;font-size:13px;font-weight:500;cursor:pointer;">
          ${tourCurrent === total - 1 ? "Selesai ✓" : "Lanjut →"}
        </button>
      </div>
    </div>
  `;
}

function tourNext() {
  tourCurrent++;
  if (tourCurrent >= tourSteps.length) {
    endTour();
    return;
  }
  renderTourStep();
}

function endTour() {
  ["tour-overlay", "tour-tooltip", "tour-highlight"].forEach((id) => {
    const el = document.getElementById(id);
    if (el) el.remove();
  });
  // Tandai sudah pernah tour
  localStorage.setItem("sipakartebu_tour_done", "1");
}

function startTour() {
  tourCurrent = 0;
  if (!document.getElementById("tour-overlay")) createTourOverlay();
  if (!document.getElementById("tour-tooltip")) createTooltip();
  if (!document.getElementById("tour-highlight")) createHighlight();
  renderTourStep();
}

// Auto-start untuk pengguna baru
document.addEventListener("DOMContentLoaded", () => {
  if (!localStorage.getItem("sipakartebu_tour_done")) {
    setTimeout(startTour, 800); // delay sedikit biar halaman load dulu
  }
});