const API_URL = window.location.origin;
let currentUser = "__guest__";

async function updateGlobalStats() {
    try {
        const url = `${API_URL}/api/accuracy-report`;
        const res = await fetch(url);
        const data = await res.json();
        const s = data.stats;
        const totalFiles = data.scan_count + data.batch_images;

        const adAcc = document.getElementById("ad-accuracy-text");
        if (adAcc) adAcc.innerText = `Akurasi ${s.accuracy}%`;

        const adCount = document.getElementById("ad-detected-count");
        if (adCount) adCount.innerText = `${totalFiles} File`;

        // Update landing page elements
        const landingTotal = document.getElementById("landing-stat-total");
        if (landingTotal) landingTotal.innerText = totalFiles;

        const landingCorrect = document.getElementById("landing-stat-correct");
        if (landingCorrect) landingCorrect.innerText = s.correct;

        const landingWrong = document.getElementById("landing-stat-wrong");
        if (landingWrong) landingWrong.innerText = s.wrong;

        const landingAcc = document.getElementById("landing-stat-accuracy");
        if (landingAcc) landingAcc.innerText = `${s.accuracy}%`;

        updateGuestScanCountUI();

        return { s, data, totalFiles };
    } catch (e) {
        console.error("Gagal update global stats:", e);
    }
}

// --- 1. LOADING SCREEN LOGIC ---
window.onload = () => {
    document.getElementById("loading-screen").classList.add("hidden");
    document.getElementById("auth-page").classList.remove("hidden");
    document.getElementById("auth-page").style.display = "flex";
    updateGlobalStats();
    checkApiConnection();
    // Dynamic connection heartbeat every 10 seconds (Poin 1)
    setInterval(checkApiConnection, 10000);
};

async function checkApiConnection() {
    const dot = document.getElementById("api-status-dot");
    const text = document.getElementById("api-status-text");
    const indicator = document.getElementById("api-status-indicator");
    if (!dot || !text || !indicator) return;

    try {
        const res = await fetch(`${API_URL}/api/accuracy-report`);
        if (res.ok) {
            dot.style.background = "#2ed573";
            dot.style.boxShadow = "0 0 10px #2ed573";
            text.innerText = "API Online";
            text.style.color = "#2ed573";
            indicator.style.borderColor = "rgba(46, 213, 115, 0.3)";
        } else {
            throw new Error();
        }
    } catch (e) {
        dot.style.background = "#ff4757";
        dot.style.boxShadow = "0 0 10px #ff4757";
        text.innerText = "API Offline";
        text.style.color = "#ff4757";
        indicator.style.borderColor = "rgba(255, 71, 87, 0.3)";
    }
}

// --- 2. ANIMASI PARTIKEL SENTUHAN LAYAR ---
document.addEventListener("click", (e) => {
    createParticles(e.clientX, e.clientY);
});

function createParticles(x, y) {
    const colors = ['#FFD700', '#0052D4', '#FFFACD', '#4D8BF5'];
    for (let i = 0; i < 8; i++) { // Buat 8 partikel per klik
        const particle = document.createElement("div");
        particle.classList.add("click-particle");
        const size = Math.random() * 10 + 5; // Ukuran 5-15px
        particle.style.width = `${size}px`;
        particle.style.height = `${size}px`;
        particle.style.left = `${x}px`;
        particle.style.top = `${y}px`;
        particle.style.backgroundColor = colors[Math.floor(Math.random() * colors.length)];

        // Arah random terbang partikel
        const tx = (Math.random() - 0.5) * 150;
        const ty = (Math.random() - 0.5) * 150;
        particle.style.setProperty('--tx', `${tx}px`);
        particle.style.setProperty('--ty', `${ty}px`);

        document.body.appendChild(particle);
        setTimeout(() => particle.remove(), 800); // Hapus partikel setelah animasi selesai
    }
}

// --- 3. AUTH LOGIC ---
function switchTab(tab) {
    document.getElementById("form-login").classList.toggle("hidden", tab !== "login");
    document.getElementById("form-register").classList.toggle("hidden", tab !== "register");
    document.getElementById("tab-login").classList.toggle("active", tab === "login");
    document.getElementById("tab-register").classList.toggle("active", tab === "register");
}

function updateUserTrustScoreUI(score) {
    const scoreEl = document.getElementById("user-trust-score");
    const badgeEl = document.getElementById("user-trust-badge");
    if (!scoreEl || !badgeEl) return;
    
    scoreEl.innerText = score;
    
    if (score >= 80) {
        badgeEl.innerText = "🛡️ Pakar";
        badgeEl.style.background = "rgba(46, 204, 113, 0.15)";
        badgeEl.style.color = "var(--success)";
        badgeEl.style.borderColor = "rgba(46, 204, 113, 0.25)";
    } else if (score < 50) {
        badgeEl.innerText = "⚠️ Dicurigai";
        badgeEl.style.background = "rgba(255, 71, 87, 0.15)";
        badgeEl.style.color = "var(--danger)";
        badgeEl.style.borderColor = "rgba(255, 71, 87, 0.25)";
    } else {
        badgeEl.innerText = "Standar";
        badgeEl.style.background = "rgba(255, 215, 0, 0.15)";
        badgeEl.style.color = "var(--yellow-main)";
        badgeEl.style.borderColor = "rgba(255, 215, 0, 0.25)";
    }
}

async function handleLogin(e) {
    e.preventDefault();
    const u = document.getElementById("login-user").value;
    const p = document.getElementById("login-pass").value;
    const formData = new URLSearchParams({ username: u, password: p });

    try {
        const res = await fetch(`${API_URL}/api/login`, { method: "POST", body: formData });
        const data = await res.json();
        if (res.ok) {
            currentUser = data.username;
            document.getElementById("user-name").innerText = data.name;
            updateUserTrustScoreUI(data.trust_score || 50);
            
            const inputImg = document.getElementById("input-image");
            if (inputImg) {
                if (currentUser === "Sandikad") {
                    inputImg.setAttribute("multiple", "multiple");
                } else {
                    inputImg.removeAttribute("multiple");
                }
            }

            const downloadBtn = document.getElementById("btn-download-feedback");
            if (downloadBtn) {
                if (currentUser === "Sandikad") {
                    downloadBtn.style.display = "inline-block";
                } else {
                    downloadBtn.style.display = "none";
                }
            }

            // Pulihkan visibilitas elemen UI dari mode tamu
            document.getElementById("user-trust-container").style.display = "flex";
            document.getElementById("guest-scan-container").style.display = "none";
            document.getElementById("menu-batch-test").style.display = "block";
            document.getElementById("menu-history").style.display = "block";
            document.getElementById("menu-accuracy").style.display = "block";

            document.getElementById("auth-page").classList.add("hidden");
            document.getElementById("main-app").classList.remove("hidden");
            document.getElementById("app-style").href = "style.css";
            closeAuthModal();
            loadDashboard();
            loadHistory();
        } else {
            document.getElementById("login-error").innerText = data.detail;
        }
    } catch (err) {
        document.getElementById("login-error").innerText = "Gagal menghubungi backend";
    }
}

async function handleRegister(e) {
    e.preventDefault();
    const n = document.getElementById("reg-name").value;
    const u = document.getElementById("reg-user").value;
    const p = document.getElementById("reg-pass").value;
    const formData = new URLSearchParams({ name: n, username: u, password: p });

    const res = await fetch(`${API_URL}/api/register`, { method: "POST", body: formData });
    const data = await res.json();
    if (res.ok) {
        alert("Registrasi berhasil! Silakan login.");
        switchTab('login');
    } else {
        document.getElementById("reg-error").innerText = data.detail;
    }
}

function handleLogout() {
    currentUser = "__guest__";
    const inputImg = document.getElementById("input-image");
    if (inputImg) {
        inputImg.removeAttribute("multiple");
    }
    const downloadBtn = document.getElementById("btn-download-feedback");
    if (downloadBtn) {
        downloadBtn.style.display = "none";
    }
    
    // Pulihkan kembali elemen UI ke default untuk login berikutnya
    document.getElementById("user-trust-container").style.display = "flex";
    document.getElementById("guest-scan-container").style.display = "none";
    document.getElementById("menu-batch-test").style.display = "block";
    document.getElementById("menu-history").style.display = "block";
    document.getElementById("menu-accuracy").style.display = "block";

    document.getElementById("main-app").classList.add("hidden");
    document.getElementById("auth-page").classList.remove("hidden");
    document.getElementById("app-style").href = "template/style.css";
}

// --- 4. NAVIGATION LOGIC ---
function showSection(sectionId) {
    document.querySelectorAll(".section").forEach(s => s.classList.remove("active"));
    document.querySelectorAll(".nav-item").forEach(n => n.classList.remove("active"));
    document.getElementById(`sec-${sectionId}`).classList.add("active");
    
    // Safe sidebar nav item highlight resolution (works from sidebar and shortcuts!)
    const navItems = document.querySelectorAll(".nav-item");
    navItems.forEach(n => {
        if (n.getAttribute("onclick") && n.getAttribute("onclick").includes(`'${sectionId}'`)) {
            n.classList.add("active");
        }
    });

    if (sectionId === "dashboard") loadDashboard();
    if (sectionId === "history") loadHistory();
    if (sectionId === "accuracy") loadAccuracyReport();
}

async function loadDashboard() {
    if (!currentUser) return;
    try {
        const statsData = await updateGlobalStats();
        if (!statsData) return;
        const { s, data } = statsData;
        const accColor = s.accuracy >= 70 ? "var(--success)" : s.accuracy >= 40 ? "var(--blue-dark)" : "var(--danger)";
        document.getElementById("dashboard-stats").innerHTML = `
            <div class="stat-card blue"><h3>${s.total}</h3><p>Total Test</p></div>
            <div class="stat-card yellow"><h3>${s.correct}</h3><p>Benar</p></div>
            <div class="stat-card blue"><h3>${s.wrong}</h3><p>Salah</p></div>
            <div class="stat-card yellow"><h3 style="color:${accColor}">${s.accuracy}%</h3><p>Akurasi</p></div>`;
        document.getElementById("dashboard-learning").innerHTML = `
            Data pembelajaran: <b style="color:var(--yellow-main)">${data.learning_data_count}</b> gambar siap training
            &nbsp; <button class="btn-scan" style="padding:5px 15px;font-size:12px" onclick="showSection('accuracy');event.target.blur()">Detail →</button>`;
    } catch (e) { }
}

// --- 5. FILE SCANNING LOGIC ---
document.getElementById("input-image").addEventListener("change", (e) => {
    const files = e.target.files;
    if (files.length > 1) {
        document.getElementById("img-name").innerText = `${files.length} file dipilih`;
    } else {
        document.getElementById("img-name").innerText = files[0]?.name || "Tidak ada file dipilih";
    }
});

async function simulateForensicAnalysis(resultBox, fetchPromise) {
    const steps = [
        "[Step 1/12] Metadata normal.",
        "[Step 2/12] Analisis Pixel (Komite Binary). Score: 70%",
        "[Step 3/12] Analisis Pola Sensor CFA selesai.",
        "[Step 4/12] Pencarian jejak Hex/Binary selesai.",
        "[Step 5/12] Pemetaan Noise selesai.",
        "[Step 6/12] Analisis Geometri selesai.",
        "[Step 7/12] Pencarian Artifact visual selesai.",
        "[Step 8/12] Verifikasi Tipe File selesai.",
        "[Step 9/12] Analisis Konsistensi Pencahayaan selesai.",
        "[Step 10/12] Pemindaian Duplikasi Pixel selesai.",
        "[Step 11/12] Analisis Pola Frekuensi GAN selesai.",
        "[Step 12/12] Inspeksi Tingkat Error (ELA) selesai."
    ];

    resultBox.innerHTML = "";
    resultBox.classList.remove("hidden", "ai", "real");

    const title = document.createElement("h3");
    title.style.color = "var(--yellow-main)";
    title.style.marginBottom = "15px";
    title.innerText = "⏳ Melakukan Analisis Forensik Citra...";
    resultBox.appendChild(title);

    const container = document.createElement("div");
    container.style.textAlign = "left";
    container.style.fontSize = "13px";
    container.style.fontFamily = "monospace";
    container.style.color = "#2ed573";
    container.style.lineHeight = "1.7";
    container.style.padding = "15px";
    container.style.background = "rgba(0,0,0,0.4)";
    container.style.border = "1px solid rgba(255, 215, 0, 0.2)";
    container.style.borderRadius = "12px";
    container.style.maxHeight = "220px";
    container.style.overflowY = "auto";
    container.style.marginBottom = "10px";
    resultBox.appendChild(container);

    for (let i = 0; i < steps.length; i++) {
        const stepDiv = document.createElement("div");
        stepDiv.innerText = steps[i];
        stepDiv.style.opacity = "0";
        stepDiv.style.transform = "translateX(-8px)";
        stepDiv.style.transition = "all 0.15s ease-out";
        container.appendChild(stepDiv);
        
        stepDiv.offsetHeight;
        stepDiv.style.opacity = "1";
        stepDiv.style.transform = "translateX(0)";
        
        container.scrollTop = container.scrollHeight;

        const delay = i === 1 ? 300 : (80 + Math.random() * 100);
        await new Promise(resolve => setTimeout(resolve, delay));
    }

    const waitDiv = document.createElement("div");
    waitDiv.innerText = "🔄 Menyambungkan ke Model Ensemble v4...";
    waitDiv.style.color = "var(--yellow-main)";
    waitDiv.style.fontWeight = "bold";
    waitDiv.style.marginTop = "8px";
    container.appendChild(waitDiv);
    container.scrollTop = container.scrollHeight;
}

function toggleForensicLogs(btn) {
    const content = btn.nextElementSibling;
    const arrow = btn.querySelector("span:last-child");
    if (content.classList.contains("hidden")) {
        content.classList.remove("hidden");
        arrow.innerText = "▲";
    } else {
        content.classList.add("hidden");
        arrow.innerText = "▼";
    }
}

function toggleBulkForensicLogs(btn) {
    const logsDiv = btn.nextElementSibling;
    if (logsDiv.classList.contains("hidden")) {
        logsDiv.classList.remove("hidden");
        btn.innerText = "✖️ Tutup Log";
    } else {
        logsDiv.classList.add("hidden");
        btn.innerText = "👁️ Lihat Log";
    }
}

async function scanFile() {
    const fileInput = document.getElementById("input-image");
    const resultBox = document.getElementById("result-image");

    if (currentUser === "__guest__") {
        let count = parseInt(localStorage.getItem("guest_scan_count") || "0");
        if (count >= 5) {
            alert("Batas scan gratis Anda (5 kali) sudah habis!\nSilakan Login atau Register terlebih dahulu untuk scan tanpa batas.");
            handleLogout();
            return;
        }
    }

    if (!fileInput.files || fileInput.files.length === 0) return alert("Pilih file terlebih dahulu!");

    // Case 1: Multiple files (Sandikad only)
    if (fileInput.files.length > 1) {
        if (currentUser !== "Sandikad") {
            alert("Akses Ditolak: Hanya pengguna 'Sandikad' yang diizinkan untuk memindai banyak gambar sekaligus.");
            return;
        }

        const files = Array.from(fileInput.files);
        // Check file size limits
        for (let f of files) {
            if (f.size > 10 * 1024 * 1024) {
                return alert(`Ukuran file "${f.name}" melebihi batas 10MB!`);
            }
        }

        // Show unified progress log
        resultBox.className = "result-box";
        resultBox.classList.remove("hidden", "ai", "real");
        resultBox.innerHTML = `
            <h3 style="color: var(--yellow-main); margin-bottom: 15px;">⏳ Melakukan Analisis Forensik Citra Massal (${files.length} Gambar)...</h3>
            <div id="bulk-progress-log" style="text-align: left; font-size: 13px; font-family: monospace; color: #2ed573; line-height: 1.7; padding: 15px; background: rgba(0,0,0,0.4); border: 1px solid rgba(255, 215, 0, 0.2); border-radius: 12px; max-height: 250px; overflow-y: auto;">
            </div>
        `;
        const progressLog = document.getElementById("bulk-progress-log");

        const scanResults = [];
        let lastTrustScore = 50;

        for (let i = 0; i < files.length; i++) {
            const file = files[i];
            const logItem = document.createElement("div");
            logItem.innerText = `🔄 [${i+1}/${files.length}] Memindai ${file.name}...`;
            progressLog.appendChild(logItem);
            progressLog.scrollTop = progressLog.scrollHeight;

            const formData = new FormData();
            formData.append("file", file);
            formData.append("username", currentUser);

            try {
                const res = await fetch(`${API_URL}/api/scan-image`, { method: "POST", body: formData });
                const data = await res.json();
                if (res.ok) {
                    scanResults.push({ file, success: true, data });
                    logItem.innerHTML = `✅ [${i+1}/${files.length}] Selesai: <span style="color: ${data.is_ai ? "var(--danger)" : "var(--success)"}; font-weight: bold;">${data.is_ai ? "AI" : "REAL"}</span> (${data.accuracy}%) - ${file.name}`;
                    if (data.trust_score !== undefined) {
                        lastTrustScore = data.trust_score;
                    }
                } else {
                    scanResults.push({ file, success: false, error: data.detail || "Gagal dipindai" });
                    logItem.innerHTML = `❌ [${i+1}/${files.length}] Gagal: ${data.detail || "Error"} - ${file.name}`;
                    logItem.style.color = "var(--danger)";
                }
            } catch (err) {
                scanResults.push({ file, success: false, error: "Gagal menghubungi server" });
                logItem.innerHTML = `❌ [${i+1}/${files.length}] Gagal koneksi: ${file.name}`;
                logItem.style.color = "var(--danger)";
            }
            progressLog.scrollTop = progressLog.scrollHeight;
            // Small delay to make it feel natural
            await new Promise(resolve => setTimeout(resolve, 300));
        }

        // Render multiple results view
        updateUserTrustScoreUI(lastTrustScore);
        updateGlobalStats();

        let tbodyHtml = "";
        scanResults.forEach((r, idx) => {
            if (!r.success) {
                tbodyHtml += `
                    <tr>
                        <td>${r.file.name}</td>
                        <td colspan="5" style="color: var(--danger)">Error: ${r.error}</td>
                    </tr>
                `;
                return;
            }

            const data = r.data;
            const predColor = data.is_ai ? "var(--danger)" : "var(--success)";
            const predText = data.is_ai ? "AI" : "REAL";

            // Badges
            let badgesHtml = "";
            if (data.is_grayscale) {
                badgesHtml += `<span class="badge" style="background:rgba(149,165,166,0.15);color:#bdc3c7;border:1px solid rgba(149,165,166,0.25);padding:2px 6px;border-radius:4px;font-size:10px;margin-right:4px">⚪ Monokrom</span>`;
            }
            if (data.is_dark) {
                badgesHtml += `<span class="badge" style="background:rgba(230,126,34,0.1);color:#e67e22;border:1px solid rgba(230,126,34,0.25);padding:2px 6px;border-radius:4px;font-size:10px;margin-right:4px">🌙 Low Light</span>`;
            }
            if (data.is_outlier) {
                badgesHtml += `<span class="badge" style="background:rgba(255,71,87,0.1);color:var(--danger);border:1px solid rgba(255,71,87,0.25);padding:2px 6px;border-radius:4px;font-size:10px;margin-right:4px">💡 Outlier</span>`;
            }
            if (data.is_trap) {
                badgesHtml += `<span class="badge" style="background:rgba(230,126,34,0.15);color:#e67e22;border:1px solid rgba(230,126,34,0.25);padding:2px 6px;border-radius:4px;font-size:10px;margin-right:4px">🛡️ Trap</span>`;
            }

            // Forensic logs toggle content
            let stepsHtml = "";
            if (data.forensic_analysis_logs) {
                for (let s = 1; s <= 12; s++) {
                    const stepText = data.forensic_analysis_logs[`step_${s}`] || `[Step ${s}/12] Analisis selesai.`;
                    stepsHtml += `<div style="margin-bottom: 4px; border-bottom: 1px dashed rgba(255,255,255,0.05); padding-bottom: 2px;">${stepText}</div>`;
                }
            }

            tbodyHtml += `
                <tr>
                    <td style="font-weight: bold;">${data.filename}</td>
                    <td style="color: ${predColor}; font-weight: bold;">${predText}</td>
                    <td style="color: ${predColor}">${data.accuracy}%</td>
                    <td>${badgesHtml || "-"}</td>
                    <td>
                        <button class="btn-refresh" style="padding: 4px 10px; font-size: 11px; margin: 0;" onclick="toggleBulkForensicLogs(this)">👁️ Lihat Log</button>
                        <div class="logs-content hidden" style="margin-top: 8px; background: rgba(0,0,0,0.5); border: 1px dashed rgba(255,215,0,0.3); border-radius: 8px; padding: 10px; font-family: monospace; font-size: 11px; color: #2ed573; line-height: 1.5; text-align: left; max-height: 150px; overflow-y: auto;">
                            ${stepsHtml}
                        </div>
                    </td>
                    <td>
                        <div style="display: flex; gap: 6px; justify-content: center; align-items: center;">
                            <button class="btn-scan" style="padding: 4px 10px; font-size: 11px; margin: 0; background: var(--success); border-color: var(--success);" onclick="confirmSingleResult('${data.filename}', '${data.is_ai ? "AI" : "REAL"}', '${data.accuracy}', '${data.feedback_id || ""}', this)">✅ Benar</button>
                            <button class="btn-scan" style="padding: 4px 10px; font-size: 11px; margin: 0; background: var(--danger); border-color: var(--danger);" onclick="correctSingleResult('${data.filename}', '${data.is_ai ? "AI" : "REAL"}', '${data.accuracy}', '${data.feedback_id || ""}', this)">❌ Salah</button>
                        </div>
                    </td>
                </tr>
            `;
        });

        resultBox.innerHTML = `
            <h3 style="color: var(--yellow-main); margin-bottom: 15px;">📊 Hasil Analisis Citra Massal (${files.length} Gambar)</h3>
            <div class="table-wrap">
                <table class="history-table">
                    <thead>
                        <tr>
                            <th>Gambar</th>
                            <th>Prediksi</th>
                            <th>Keakuratan</th>
                            <th>Info Deteksi</th>
                            <th>Log Forensik (12 Langkah)</th>
                            <th>Tindakan / Feedback</th>
                        </tr>
                    </thead>
                    <tbody>
                        ${tbodyHtml}
                    </tbody>
                </table>
            </div>
        `;
        return;
    }

    // Case 2: Single file
    const file = fileInput.files[0];
    if (file.size > 10 * 1024 * 1024) return alert("Ukuran file melebihi batas 10MB!");

    const formData = new FormData();
    formData.append("file", file);
    formData.append("username", currentUser);

    const fetchPromise = fetch(`${API_URL}/api/scan-image`, { method: "POST", body: formData });
    
    await simulateForensicAnalysis(resultBox, fetchPromise);

    try {
        const res = await fetchPromise;
        const data = await res.json();

        // CEK OTOMATIS GAMBAR HITAM PUTIH UNTUK TAMPILKAN BANNER ALERT
        const warningBanner = document.getElementById("warning-banner-monokrom");
        if (warningBanner) {
            if (data.is_monochrome_detected === true) {
                warningBanner.style.display = "block";
            } else {
                warningBanner.style.display = "none";
            }
        }

        if (res.ok) {
            if (currentUser === "__guest__") {
                let count = parseInt(localStorage.getItem("guest_scan_count") || "0");
                count++;
                localStorage.setItem("guest_scan_count", count.toString());
                updateGuestScanCountUI();
            }

            const statusClass = data.is_ai ? "ai" : "real";
            const statusText = data.is_ai ? "⚠️ GAMBAR PALSU (AI)" : "✅ GAMBAR ASLI (REAL)";
            const statusColor = data.is_ai ? "var(--danger)" : "var(--success)";

            let logsHtml = '';
            if (data.forensic_analysis_logs && Object.keys(data.forensic_analysis_logs).length > 0) {
                logsHtml = `
                <div class="forensic-logs-detail" style="margin-top: 15px; margin-bottom: 15px; text-align: left;">
                    <button class="btn-refresh" style="width: 100%; text-align: left; padding: 10px 15px; background: rgba(0,0,0,0.3); border: 1px solid rgba(255,215,0,0.25); border-radius: 8px; color: var(--yellow-main); cursor: pointer; font-size: 13px; display: flex; justify-content: space-between; align-items: center; margin-bottom: 0;" onclick="toggleForensicLogs(this)">
                        <span>🔍 Lihat Log Detil Forensik (12 Langkah)</span>
                        <span style="font-size:10px">▼</span>
                    </button>
                    <div class="logs-content hidden" style="background: rgba(0,0,0,0.5); border: 1px solid rgba(255,215,0,0.15); border-top: none; border-radius: 0 0 8px 8px; padding: 15px; font-family: monospace; font-size: 12px; color: #2ed573; line-height: 1.6; max-height: 250px; overflow-y: auto;">
                `;
                for (let i = 1; i <= 12; i++) {
                    const stepText = data.forensic_analysis_logs[`step_${i}`] || `[Step ${i}/12] Analisis selesai.`;
                    logsHtml += `<div style="margin-bottom: 6px; border-bottom: 1px dashed rgba(255,255,255,0.05); padding-bottom: 4px;">${stepText}</div>`;
                }
                logsHtml += `
                    </div>
                </div>
                `;
            }

            resultBox.className = `result-box ${statusClass}`;
            resultBox.innerHTML = `
                <div class="result-title" style="color: ${statusColor}">
                    <span>${statusText}</span>
                    <span>Akurasi: ${data.accuracy}%</span>
                </div>
                <div class="badge-bar" style="display:flex;gap:8px;margin-bottom:15px;flex-wrap:wrap">
                    <span class="badge" style="background:rgba(255,215,0,0.1);color:var(--yellow-main);border:1px solid rgba(255,215,0,0.25);padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:4px">
                        🧬 Cosine Similarity: ${(data.similarity * 100).toFixed(1)}%
                    </span>
                    ${data.is_outlier 
                        ? `<span class="badge" style="background:rgba(255,71,87,0.1);color:var(--danger);border:1px solid rgba(255,71,87,0.25);padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:4px">💡 Data Asing (Outlier)</span>`
                        : `<span class="badge" style="background:rgba(46,204,113,0.1);color:var(--success);border:1px solid rgba(46,204,113,0.25);padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:4px">🎯 Klasifikasi Aman</span>`
                    }
                    ${data.is_trap 
                        ? `<span class="badge" style="background:rgba(230,126,34,0.15);color:#e67e22;border:1px solid rgba(230,126,34,0.25);padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:4px">⚠️ Trap Image Mode</span>`
                        : ''
                    }
                    ${data.is_dark 
                        ? `<span class="badge" style="background:rgba(230,126,34,0.1);color:#e67e22;border:1px solid rgba(230,126,34,0.25);padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:4px">🌙 Low Light (Cahaya Rendah)</span>`
                        : ''
                    }
                    ${data.is_grayscale 
                        ? `<span class="badge" style="background:rgba(149,165,166,0.15);color:#bdc3c7;border:1px solid rgba(149,165,166,0.25);padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:4px">⚪ Monokrom (Hitam Putih)</span>`
                        : ''
                    }
                </div>
                
                ${(data.is_dark || data.is_grayscale) 
                    ? `
                    <div style="background: rgba(230,126,34,0.1); border: 1px dashed rgba(230,126,34,0.3); border-radius: 8px; padding: 12px; margin-bottom: 15px; font-size: 12px; color: #f39c12; line-height: 1.5; text-align: left;">
                        <b>⚠️ Rekomendasi Kondisi Deteksi:</b><br/>
                        ${data.is_dark ? '• Cahaya terdeteksi rendah (kecerahan rata-rata: ' + data.avg_brightness + '/255). Hal ini memicu noise sensor kamera yang dapat mengganggu keakuratan forensik AI.<br/>' : ''}
                        ${data.is_grayscale ? '• Gambar monokrom/hitam-putih terdeteksi. Kehilangan informasi kromatik (saluran warna RGB) secara drastis dapat menurunkan performa klasifikasi model AI.<br/>' : ''}
                        <i style="display:block;margin-top:6px;color:rgba(255,255,255,0.7)">Disarankan untuk melakukan scan ulang menggunakan foto dengan pencahayaan cukup and penuh warna (Full RGB).</i>
                    </div>
                    ` 
                    : ''
                }

                ${logsHtml}

                <div class="details-grid">
                    <div class="detail-item">
                        <div class="detail-label">Nama File</div>
                        <div class="detail-value">${data.filename}</div>
                    </div>
                    <div class="detail-item">
                        <div class="detail-label">Tipe</div>
                        <div class="detail-value">${data.type.toUpperCase()}</div>
                    </div>
                    <div class="detail-item">
                        <div class="detail-label">Ukuran File</div>
                        <div class="detail-value">${data.file_size}</div>
                    </div>
                    <div class="detail-item">
                        <div class="detail-label">Sumber Deteksi</div>
                        <div class="detail-value" style="font-size:12px">${data.source}</div>
                    </div>
                    <div class="detail-item">
                        <div class="detail-label">Tanggal Scan</div>
                        <div class="detail-value">${data.date}</div>
                    </div>
                    <div class="detail-item">
                        <div class="detail-label">Keakuratan</div>
                        <div class="detail-value" style="color: ${statusColor}">${data.accuracy}%</div>
                    </div>
                </div>
                <div style="margin-top:15px;padding-top:15px;border-top:1px solid rgba(255,255,255,0.2)">
                    <p style="margin-bottom:10px;color:var(--yellow-main)">Apakah hasil ini benar?</p>
                    <button class="btn-scan" style="padding:8px 25px;font-size:14px;margin-right:10px" onclick="confirmSingleResult('${data.filename}', '${data.is_ai ? "AI" : "REAL"}', '${data.accuracy}', '${data.feedback_id || ""}', this)">✅ Benar</button>
                    <button class="btn-scan" style="padding:8px 25px;font-size:14px" onclick="correctSingleResult('${data.filename}', '${data.is_ai ? "AI" : "REAL"}', '${data.accuracy}', '${data.feedback_id || ""}', this)">❌ Salah</button>
                    <div id="single-correction-area" style="margin-top:10px"></div>
                </div>
            `;
            if (currentUser !== "__guest__") {
                updateUserTrustScoreUI(data.trust_score || 50);
            }
        } else {
            resultBox.innerHTML = `<h3 style="color: var(--danger)">Error: ${data.detail}</h3>`;
        }
    } catch (err) {
        resultBox.innerHTML = "<h3 style='color: var(--danger)'>Gagal terhubung ke server Backend.</h3>";
    }
}

function confirmSingleResult(filename, prediction, accuracy, feedbackId, btn) {
    fetch(`${API_URL}/api/correction-single`, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
            username: currentUser,
            filename: filename,
            original_prediction: prediction,
            correct_label: prediction,
            confidence: parseFloat(accuracy),
            feedback_id: feedbackId
        })
    })
    .then(res => res.json())
    .then(data => {
        updateGlobalStats();
        if (data.is_trap) {
            if (currentUser !== "__guest__") {
                updateUserTrustScoreUI(data.new_trust);
                const scoreDiff = data.trust_change > 0 ? `+${data.trust_change}` : `${data.trust_change}`;
                const statusIcon = data.trap_correct ? "🎉 BENAR!" : "❌ SALAH!";
                alert(`🛡️ TRAP IMAGE DETECTED!\nFeedback Anda ${statusIcon}\nSkor Kredibilitas Anda: ${scoreDiff} (Sekarang: ${data.new_trust}/100)`);
            } else {
                alert(`🛡️ TRAP IMAGE DETECTED! (Mode Tamu)`);
            }
        }
    })
    .catch(() => { });
    btn.closest("div").innerHTML = "<p style='color:var(--success)'>✅ Konfirmasi tersimpan!</p>";
}

function correctSingleResult(filename, prediction, accuracy, feedbackId, btn) {
    const correctLabel = prediction === "AI" ? "REAL" : "AI";
    fetch(`${API_URL}/api/correction-single`, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
            username: currentUser,
            filename: filename,
            original_prediction: prediction,
            correct_label: correctLabel,
            confidence: parseFloat(accuracy),
            feedback_id: feedbackId
        })
    })
    .then(res => res.json())
    .then(data => {
        updateGlobalStats();
        if (data.is_trap) {
            if (currentUser !== "__guest__") {
                updateUserTrustScoreUI(data.new_trust);
                const scoreDiff = data.trust_change > 0 ? `+${data.trust_change}` : `${data.trust_change}`;
                const statusIcon = data.trap_correct ? "🎉 BENAR!" : "❌ SALAH!";
                alert(`🛡️ TRAP IMAGE DETECTED!\nFeedback Anda ${statusIcon}\nSkor Kredibilitas Anda: ${scoreDiff} (Sekarang: ${data.new_trust}/100)`);
            } else {
                alert(`🛡️ TRAP IMAGE DETECTED! (Mode Tamu)`);
            }
        }
    })
    .catch(() => { });
    btn.closest("div").innerHTML = `<p style='color:var(--success)'>✅ Koreksi tersimpan! (seharusnya ${correctLabel})</p>`;
}

// --- 7. BATCH TEST LOGIC ---
let batchFiles = [];
let batchLabels = [];

document.getElementById("input-batch").addEventListener("change", (e) => {
    const files = e.target.files;
    if (!files.length) return;

    const folderName = files[0].webkitRelativePath.split('/')[0];
    document.getElementById("batch-folder-name").innerText = folderName;

    batchFiles = [];
    batchLabels = [];
    const listDiv = document.getElementById("batch-file-list");
    listDiv.innerHTML = "<h4 style='margin-bottom:10px'>File ditemukan:</h4>";

    const table = document.createElement("table");
    table.className = "history-table";
    table.innerHTML = `<thead><tr><th>File</th><th>Folder</th></tr></thead><tbody></tbody>`;
    const tbody = table.querySelector("tbody");

    let hasValidSubfolders = false;

    for (let f of files) {
        const parts = f.webkitRelativePath.split('/');
        const label = parts.length > 1 ? parts[parts.length - 2] : "";
        if (!f.name.match(/\.(png|jpg|jpeg|webp)$/i)) continue;

        // Normalize folder label for display consistency (Poin 2)
        const labelUpper = label.toUpperCase();
        let normLabel = "";
        if (labelUpper === "FAKE" || labelUpper === "AI") {
            normLabel = "AI";
            hasValidSubfolders = true;
        } else if (labelUpper === "REAL") {
            normLabel = "REAL";
            hasValidSubfolders = true;
        }

        batchFiles.push(f);
        batchLabels.push(normLabel);

        const tr = document.createElement("tr");
        const color = normLabel === "REAL" ? "var(--success)" :
            (normLabel === "AI") ? "var(--danger)" : "rgba(255,255,255,0.4)";
        tr.innerHTML = `<td>${f.name}</td><td style="color:${color};font-weight:bold">${normLabel || "-"}</td>`;
        tbody.appendChild(tr);
    }

    if (currentUser !== "Sandikad" && !hasValidSubfolders) {
        alert("Akses Ditolak: Hanya pengguna 'Sandikad' yang diizinkan melakukan Batch Scan tanpa struktur subfolder (real/fake).\nSilakan unggah folder yang berisi subfolder 'real' dan 'fake/ai'.");
        batchFiles = [];
        batchLabels = [];
        document.getElementById("batch-folder-name").innerText = "Belum ada folder dipilih";
        listDiv.innerHTML = "";
        return;
    }

    listDiv.appendChild(table);
    listDiv.innerHTML += `<p style="margin-top:10px;color:var(--yellow-main)">Total: <b>${batchFiles.length}</b> gambar</p>`;
});

async function startBatchScan() {
    if (!batchFiles.length) return alert("Pilih folder terlebih dahulu!");
    if (!currentUser) return alert("Login dulu!");

    let hasValidSubfolders = batchLabels.some(l => l === "REAL" || l === "AI");
    if (currentUser !== "Sandikad" && !hasValidSubfolders) {
        alert("Akses Ditolak: Hanya pengguna 'Sandikad' yang diizinkan melakukan Batch Scan tanpa struktur subfolder (real/fake).");
        return;
    }

    const progress = document.getElementById("batch-progress");
    const resultDiv = document.getElementById("batch-result");
    const confirmArea = document.getElementById("batch-confirm-area");
    progress.classList.remove("hidden");
    resultDiv.classList.add("hidden");
    if (confirmArea) confirmArea.classList.add("hidden");
    progress.innerHTML = "⏳ Mengirim file ke server...";

    const formData = new FormData();
    for (let f of batchFiles) {
        formData.append("files", f);
    }
    formData.append("username", currentUser);
    // Convert to robust filename -> label map to prevent any index alignment shifts
    const labelMap = {};
    for (let i = 0; i < batchFiles.length; i++) {
        labelMap[batchFiles[i].name] = batchLabels[i];
    }
    formData.append("labels", JSON.stringify(labelMap));

    try {
        const res = await fetch(`${API_URL}/api/batch-scan`, { method: "POST", body: formData });
        const data = await res.json();
        progress.classList.add("hidden");

        if (!res.ok) {
            resultDiv.innerHTML = `<h3 style="color:var(--danger)">Error: ${data.detail}</h3>`;
            resultDiv.classList.remove("hidden");
            return;
        }

        displayBatchResults(data, resultDiv, confirmArea);
        updateGlobalStats();
    } catch (err) {
        progress.innerHTML = "<h3 style='color:var(--danger)'>Gagal terhubung ke server.</h3>";
    }
}

function displayBatchResults(data, resultDiv, confirmArea) {
    const isUnlabeled = data.accuracy === -1;
    const color = isUnlabeled ? "var(--yellow-main)" : (data.accuracy >= 70 ? "var(--success)" : data.accuracy >= 40 ? "var(--blue-dark)" : "var(--danger)");

    let html = `
        <div class="result-box" style="border-color:${color}">
            <div class="result-title" style="color:${color}; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px;">
                <div>
                    <span>${isUnlabeled ? "Hasil Batch Scan" : "Hasil Batch Test"}</span>
                    <span style="font-size: 12px; background: rgba(255, 215, 0, 0.15); color: var(--yellow-main); padding: 4px 8px; border-radius: 6px; margin-left: 10px; font-weight: normal; border: 1px solid rgba(255, 215, 0, 0.3)">Using Threshold: 0.50</span>
                </div>
                <span>Akurasi: ${isUnlabeled ? "-" : data.accuracy + "%"}</span>
            </div>
            <div class="details-grid">
                <div class="detail-item">
                    <div class="detail-label">Total Gambar</div>
                    <div class="detail-value">${data.total}</div>
                </div>
                <div class="detail-item">
                    <div class="detail-label">Benar</div>
                    <div class="detail-value" style="color:var(--success)">${isUnlabeled ? "-" : data.correct}</div>
                </div>
                <div class="detail-item">
                    <div class="detail-label">Salah</div>
                    <div class="detail-value" style="color:var(--danger)">${isUnlabeled ? "-" : data.wrong}</div>
                </div>
                <div class="detail-item">
                    <div class="detail-label">Akurasi</div>
                    <div class="detail-value" style="color:${color}">${isUnlabeled ? "-" : data.accuracy + "%"}</div>
                </div>
            </div>
        </div>
        <div class="table-wrap" style="margin-top:15px">
        <table class="history-table">
            <thead><tr><th>File</th><th>Folder</th><th>Prediksi</th><th>Confidence</th><th>Status</th></tr></thead>
            <tbody>`;

    data.results.forEach((r, i) => {
        if (r.error) {
            html += `<tr><td>${r.filename}</td><td colspan="4" style="color:var(--danger)">Error: ${r.error}</td></tr>`;
            return;
        }
        const statusColor = r.folder_label ? (r.is_mismatch ? "var(--danger)" : "var(--success)") : "rgba(255, 255, 255, 0.4)";
        const statusText = r.folder_label ? (r.is_mismatch ? "❌ SALAH" : "✅ BENAR") : "-";
        
        // Capitalize folder label consistently (Poin 2)
        const folderUpper = r.folder_label ? r.folder_label.toUpperCase() : "-";
        const folderColor = folderUpper === "REAL" ? "var(--success)" :
            (folderUpper === "AI" || folderUpper === "FAKE") ? "var(--danger)" : "rgba(255, 255, 255, 0.4)";
        
        const predColor = r.prediction === "REAL" ? "var(--success)" : "var(--danger)";
        
        // Highlight incorrect rows (Poin 3)
        const rowBg = r.is_mismatch ? "background: rgba(255, 71, 87, 0.08);" : "";
        
        html += `<tr style="${rowBg}">
            <td>${r.filename}</td>
            <td style="color:${folderColor};font-weight:bold">${folderUpper}</td>
            <td style="color:${predColor};font-weight:bold">${r.prediction}</td>
            <td style="color:var(--yellow-main)">${r.confidence}%</td>
            <td style="color:${statusColor};font-weight:bold">${statusText}</td>
        </tr>`;
    });

    html += `</tbody></table></div>`;
    html += `<div style="margin-top:15px;text-align:center"><button class="btn-scan" onclick="showSection('accuracy');event.target.closest('#batch-result .btn-scan').remove()" style="padding:10px 30px;font-size:14px">📊 Lihat Akurasi →</button></div>`;
    resultDiv.innerHTML = html;
    resultDiv.classList.remove("hidden");

}

// --- 7. ACCURACY REPORT ---
async function loadAccuracyReport() {
    if (!currentUser) return;

    const summaryDiv = document.getElementById("accuracy-summary");
    const timeFilter = document.getElementById("accuracy-time-filter")?.value || "all";

    try {
        const res = await fetch(`${API_URL}/api/accuracy-report?filter=${timeFilter}`);
        const report = await res.json();

        const s = report.stats;
        const matrix = report.confusion_matrix;
        const dist = report.confidence_distribution;
        const failures = report.failures;

        const textColor = s.accuracy >= 70 ? "var(--success)" : s.accuracy >= 40 ? "var(--yellow-main)" : "var(--danger)";

        // 1. Render Summary stats & Advanced metrics
        summaryDiv.innerHTML = `
            <!-- Primary Stats -->
            <div class="stats-grid">
                <div class="stat-card blue"><h3>${s.total}</h3><p>Total Test</p></div>
                <div class="stat-card yellow"><h3>${s.correct}</h3><p>Benar</p></div>
                <div class="stat-card blue"><h3>${s.wrong}</h3><p>Salah</p></div>
                <div class="stat-card yellow"><h3 style="color:${textColor}">${s.accuracy}%</h3><p>Akurasi</p></div>
            </div>
            
            <!-- Advanced ML Metrics -->
            <div class="stats-grid" style="grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); margin-top: 15px;">
                <div class="stat-card" style="background: #002244 !important; border: 1px solid rgba(255, 215, 0, 0.35) !important; border-left: 4px solid var(--yellow-main) !important; padding: 15px; border-radius: 12px; text-align: center; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25) !important;">
                    <h3 style="font-size: 24px; color: #FFD700 !important; font-weight: 800; margin: 0; opacity: 1 !important;">${s.precision}%</h3>
                    <p style="font-size: 11px; margin: 6px 0 0 0; color: #ffffff !important; opacity: 1 !important; font-weight: 700; text-transform: uppercase; letter-spacing: 0.6px;">Precision (Presisi)</p>
                </div>
                <div class="stat-card" style="background: #002244 !important; border: 1px solid rgba(255, 215, 0, 0.35) !important; border-left: 4px solid var(--yellow-main) !important; padding: 15px; border-radius: 12px; text-align: center; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25) !important;">
                    <h3 style="font-size: 24px; color: #FFD700 !important; font-weight: 800; margin: 0; opacity: 1 !important;">${s.recall}%</h3>
                    <p style="font-size: 11px; margin: 6px 0 0 0; color: #ffffff !important; opacity: 1 !important; font-weight: 700; text-transform: uppercase; letter-spacing: 0.6px;">Recall (Sensitivitas)</p>
                </div>
                <div class="stat-card" style="background: #002244 !important; border: 1px solid rgba(255, 215, 0, 0.35) !important; border-left: 4px solid var(--yellow-main) !important; padding: 15px; border-radius: 12px; text-align: center; box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25) !important;">
                    <h3 style="font-size: 24px; color: #FFD700 !important; font-weight: 800; margin: 0; opacity: 1 !important;">${s.f1_score}%</h3>
                    <p style="font-size: 11px; margin: 6px 0 0 0; color: #ffffff !important; opacity: 1 !important; font-weight: 700; text-transform: uppercase; letter-spacing: 0.6px;">F1-Score (Harmonis)</p>
                </div>
            </div>
            
            <!-- Info Box -->
            <div class="info-box" style="margin-top: 15px;">
                <p>Batch test: <b style="color:var(--yellow-main)">${report.batch_images}</b> gambar</p>
                <p>Scan individu: <b style="color:var(--yellow-main)">${report.scan_count}</b> gambar</p>
                <p>Total data pembelajaran: <b style="color:var(--yellow-main)">${report.learning_data_count}</b> gambar (siap training)</p>
            </div>
        `;

        // 2. Render Confusion Matrix Values
        document.getElementById("cm-tp").innerHTML = `${matrix.tp}<br><span style="font-size: 9px; opacity: 0.8; font-weight: normal; margin-top: 3px;">TP (True AI)</span>`;
        document.getElementById("cm-fp").innerHTML = `${matrix.fp}<br><span style="font-size: 9px; opacity: 0.8; font-weight: normal; margin-top: 3px;">FP (False AI)</span>`;
        document.getElementById("cm-fn").innerHTML = `${matrix.fn}<br><span style="font-size: 9px; opacity: 0.8; font-weight: normal; margin-top: 3px;">FN (False Real)</span>`;
        document.getElementById("cm-tn").innerHTML = `${matrix.tn}<br><span style="font-size: 9px; opacity: 0.8; font-weight: normal; margin-top: 3px;">TN (True Real)</span>`;

        // 3. Render Failure Log Table
        const failureBody = document.getElementById("failure-log-body");
        failureBody.innerHTML = "";
        if (failures.length === 0) {
            failureBody.innerHTML = "<tr><td colspan='5' style='text-align:center;padding:20px;color:rgba(255,255,255,0.3)'>Tidak ada kesalahan tebak terdeteksi dalam data pengetesan ini! 🎉</td></tr>";
        } else {
            failures.forEach(f => {
                const expColor = f.expected === 'AI' ? 'var(--danger)' : 'var(--success)';
                const predColor = f.prediction === 'AI' ? 'var(--danger)' : 'var(--success)';
                failureBody.innerHTML += `
                    <tr>
                        <td>${f.filename}</td>
                        <td><span style="color: ${expColor}; font-weight:bold">${f.expected}</span></td>
                        <td><span style="color: ${predColor}">${f.prediction}</span></td>
                        <td style="color: var(--yellow-main); font-weight:bold">${f.confidence}%</td>
                        <td style="font-size: 11px; opacity: 0.7;">${f.date}</td>
                    </tr>
                `;
            });
        }

        // 4. Render Charts
        drawDonutChart(s.correct, s.wrong);
        drawBarChart(report.batches);
        drawConfidenceChart(dist);
    } catch (err) {
        console.error("Gagal memuat accuracy report:", err);
    }
}

let chartDonut = null, chartBar = null, chartConfidence = null;

function drawDonutChart(correct, wrong) {
    const ctx = document.getElementById("chart-donut").getContext("2d");
    if (chartDonut) chartDonut.destroy();
    if (correct + wrong === 0) return;
    chartDonut = new Chart(ctx, {
        type: "doughnut",
        data: {
            labels: ["Benar", "Salah"],
            datasets: [{
                data: [correct, wrong],
                backgroundColor: ["#2ed573", "#ff4757"],
                borderWidth: 0
            }]
        },
        options: {
            responsive: true, maintainAspectRatio: false,
            plugins: {
                title: { display: true, text: "Perbandingan Benar vs Salah", color: "#FFD700" },
                legend: { labels: { color: "#fff" } }
            }
        }
    });
}

function drawBarChart(batches) {
    const ctx = document.getElementById("chart-bar").getContext("2d");
    if (chartBar) chartBar.destroy();
    if (!batches.length) return;
    chartBar = new Chart(ctx, {
        type: "bar",
        data: {
            labels: batches.slice(0, 10).map(b => "#" + b.id), // limit to latest 10 batches
            datasets: [
                { label: "Benar", data: batches.slice(0, 10).map(b => b.correct_count), backgroundColor: "#2ed573" },
                { label: "Salah", data: batches.slice(0, 10).map(b => b.wrong_count), backgroundColor: "#ff4757" }
            ]
        },
        options: {
            responsive: true, maintainAspectRatio: false,
            scales: {
                x: { ticks: { color: "#fff" }, stacked: true },
                y: { ticks: { color: "#fff" }, stacked: true }
            },
            plugins: {
                title: { display: true, text: "Akurasi per Batch Test (10 Terakhir)", color: "#FFD700" },
                legend: { labels: { color: "#fff" } }
            }
        }
    });
}

function drawConfidenceChart(dist) {
    const ctx = document.getElementById("chart-confidence").getContext("2d");
    if (chartConfidence) chartConfidence.destroy();
    chartConfidence = new Chart(ctx, {
        type: "line",
        data: {
            labels: dist.buckets,
            datasets: [
                {
                    label: "REAL Predictions",
                    data: dist.real,
                    borderColor: "#2ed573",
                    backgroundColor: "rgba(46, 213, 115, 0.1)",
                    fill: true,
                    tension: 0.4
                },
                {
                    label: "AI Predictions",
                    data: dist.ai,
                    borderColor: "#ff4757",
                    backgroundColor: "rgba(255, 71, 87, 0.1)",
                    fill: true,
                    tension: 0.4
                }
            ]
        },
        options: {
            responsive: true, maintainAspectRatio: false,
            scales: {
                x: { ticks: { color: "#fff" }, grid: { color: "rgba(255,255,255,0.05)" } },
                y: { ticks: { color: "#fff" }, grid: { color: "rgba(255,255,255,0.05)" }, beginAtZero: true }
            },
            plugins: {
                title: { display: true, text: "Sebaran Skor Keyakinan (Confidence)", color: "#FFD700" },
                legend: { labels: { color: "#fff" } }
            }
        }
    });
}

async function confirmClearHistory() {
    if (!confirm("⚠️ PERINGATAN: Apakah Anda yakin ingin menghapus seluruh riwayat scan dan merestart semua statistik pengujian kembali ke angka nol? Tindakan ini tidak dapat dibatalkan!")) {
        return;
    }
    try {
        const res = await fetch(`${API_URL}/api/clear-history`);
        const data = await res.json();
        if (res.ok) {
            alert("Statistik berhasil direset ke nol!");
            loadAccuracyReport();
            loadHistory();
            updateGlobalStats();
        }
    } catch (e) {
        alert("Gagal mereset statistik.");
    }
}

function downloadFeedback() {
    if (currentUser !== "Sandikad") {
        alert("Hanya user Sandikad yang dapat mendownload feedback.");
        return;
    }
    window.open(`${API_URL}/api/download-feedback?username=${currentUser}`, "_blank");
}
async function loadHistory() {
    if (!currentUser) return;
    const tbody = document.getElementById("history-body");
    const count = document.getElementById("history-count");
    tbody.innerHTML = "<tr><td colspan='7' style='text-align:center;padding:25px;color:rgba(255,255,255,0.3)'>Loading...</td></tr>";

    try {
        const res = await fetch(`${API_URL}/api/history/${currentUser}`);
        const data = await res.json();
        tbody.innerHTML = "";
        count.innerText = `${data.history.length} item`;

        data.history.forEach(item => {
            if (item._type === "batch") {
                const batchColor = item.accuracy >= 70 ? "var(--success)" : item.accuracy >= 40 ? "var(--yellow-main)" : "var(--danger)";
                tbody.innerHTML += `
                    <tr style="background:rgba(255,215,0,0.05)">
                        <td style="color:var(--yellow-main)">${item.filename}</td>
                        <td>${item.file_type}</td>
                        <td>${item.file_size}</td>
                        <td style="font-size:12px">${item.source}</td>
                        <td style="color: ${batchColor}; font-weight:bold">${item.accuracy}%</td>
                        <td style="color: ${batchColor}; font-weight:bold">${item.accuracy >= 70 ? '✅ Baik' : item.accuracy >= 40 ? '⚠️ Sedang' : '❌ Buruk'}</td>
                        <td>${item.scan_date}</td>
                    </tr>`;
            } else {
                const statusColor = item.is_ai ? "var(--danger)" : "var(--success)";
                const statusText = item.is_ai ? "Palsu (AI)" : "Asli (Real)";
                tbody.innerHTML += `
                    <tr>
                        <td>${item.filename}</td>
                        <td>${item.file_type}</td>
                        <td>${item.file_size}</td>
                        <td style="font-size:12px">${item.source}</td>
                        <td style="color: var(--yellow-main); font-weight:bold">${item.accuracy}%</td>
                        <td style="color: ${statusColor}; font-weight:bold">${statusText}</td>
                        <td>${item.scan_date}</td>
                    </tr>
                `;
            }
        });
        if (data.history.length === 0) tbody.innerHTML = "<tr><td colspan='7' style='text-align:center;padding:30px;color:rgba(255,255,255,0.3)'>Belum ada history. Scan gambar atau jalankan batch test.</td></tr>";
    } catch (err) {
        tbody.innerHTML = "<tr><td colspan='7' style='text-align:center;padding:30px;color:var(--danger)'>Gagal memuat data.</td></tr>";
    }
}

function startGuestMode(e) {
    if (e) e.preventDefault();
    currentUser = "__guest__";
    document.getElementById("user-name").innerText = "Guest";
    
    // Sembunyikan skor kredibilitas & tampilkan sisa scan gratis
    document.getElementById("user-trust-container").style.display = "none";
    const limitContainer = document.getElementById("guest-scan-container");
    if (limitContainer) {
        limitContainer.style.display = "flex";
        updateGuestScanCountUI();
    }
    
    // Batasi akses sidebar hanya ke Dashboard dan Scan Gambar
    document.getElementById("menu-batch-test").style.display = "none";
    document.getElementById("menu-history").style.display = "none";
    document.getElementById("menu-accuracy").style.display = "none";
    
    // Transisi ke aplikasi utama
    document.getElementById("auth-page").classList.add("hidden");
    document.getElementById("main-app").classList.remove("hidden");
    document.getElementById("app-style").href = "style.css";
    
    // Tampilkan bagian dashboard secara default
    showSection("dashboard");
    loadDashboard();
}

function updateGuestScanCountUI() {
    let count = parseInt(localStorage.getItem("guest_scan_count") || "0");
    const remaining = Math.max(0, 5 - count);
    const remEl = document.getElementById("guest-scan-remaining");
    if (remEl) {
        remEl.innerText = remaining;
    }
    const landingQuotaEl = document.getElementById("landing-quota-left");
    if (landingQuotaEl) {
        landingQuotaEl.innerText = remaining;
    }
}

// --- AUTH MODAL LOGIC ---
function openAuthModal() {
    document.getElementById("auth-modal").classList.remove("hidden");
}

function closeAuthModal() {
    document.getElementById("auth-modal").classList.add("hidden");
}

function closeAuthModalOnOverlay(e) {
    if (e.target === document.getElementById("auth-modal")) {
        closeAuthModal();
    }
}

// --- LANDING PAGE FILE SCANNING LOGIC ---
document.getElementById("landing-input-image").addEventListener("change", (e) => {
    document.getElementById("landing-img-name").innerText = e.target.files[0]?.name || "Tidak ada file dipilih";
});

async function scanLandingFile() {
    const fileInput = document.getElementById("landing-input-image");
    const resultBox = document.getElementById("landing-result-image");

    let count = parseInt(localStorage.getItem("guest_scan_count") || "0");
    if (count >= 5) {
        alert("Batas scan gratis Anda (5 kali) sudah habis!\nSilakan Login atau Register terlebih dahulu untuk scan tanpa batas.");
        openAuthModal();
        return;
    }

    if (!fileInput.files[0]) return alert("Pilih file terlebih dahulu!");

    const file = fileInput.files[0];
    if (file.size > 10 * 1024 * 1024) return alert("Ukuran file melebihi batas 10MB!");

    const formData = new FormData();
    formData.append("file", file);
    formData.append("username", "__guest__");

    const fetchPromise = fetch(`${API_URL}/api/scan-image`, { method: "POST", body: formData });
    
    await simulateForensicAnalysis(resultBox, fetchPromise);

    try {
        const res = await fetchPromise;
        const data = await res.json();

        // CEK OTOMATIS GAMBAR HITAM PUTIH UNTUK TAMPILKAN BANNER ALERT
        const warningBanner = document.getElementById("landing-warning-banner-monokrom");
        if (warningBanner) {
            if (data.is_monochrome_detected === true) {
                warningBanner.style.display = "block";
            } else {
                warningBanner.style.display = "none";
            }
        }

        if (res.ok) {
            let count = parseInt(localStorage.getItem("guest_scan_count") || "0");
            count++;
            localStorage.setItem("guest_scan_count", count.toString());
            updateGuestScanCountUI();

            const statusClass = data.is_ai ? "ai" : "real";
            const statusText = data.is_ai ? "⚠️ GAMBAR PALSU (AI)" : "✅ GAMBAR ASLI (REAL)";
            const statusColor = data.is_ai ? "var(--danger)" : "var(--success)";

            let logsHtml = '';
            if (data.forensic_analysis_logs && Object.keys(data.forensic_analysis_logs).length > 0) {
                logsHtml = `
                <div class="forensic-logs-detail" style="margin-top: 15px; margin-bottom: 15px; text-align: left;">
                    <button class="btn-refresh" style="width: 100%; text-align: left; padding: 10px 15px; background: rgba(0,0,0,0.3); border: 1px solid rgba(255,215,0,0.25); border-radius: 8px; color: var(--yellow-main); cursor: pointer; font-size: 13px; display: flex; justify-content: space-between; align-items: center; margin-bottom: 0;" onclick="toggleForensicLogs(this)">
                        <span>🔍 Lihat Log Detil Forensik (12 Langkah)</span>
                        <span style="font-size:10px">▼</span>
                    </button>
                    <div class="logs-content hidden" style="background: rgba(0,0,0,0.5); border: 1px solid rgba(255,215,0,0.15); border-top: none; border-radius: 0 0 8px 8px; padding: 15px; font-family: monospace; font-size: 12px; color: #2ed573; line-height: 1.6; max-height: 250px; overflow-y: auto;">
                `;
                for (let i = 1; i <= 12; i++) {
                    const stepText = data.forensic_analysis_logs[`step_${i}`] || `[Step ${i}/12] Analisis selesai.`;
                    logsHtml += `<div style="margin-bottom: 6px; border-bottom: 1px dashed rgba(255,255,255,0.05); padding-bottom: 4px;">${stepText}</div>`;
                }
                logsHtml += `
                    </div>
                </div>
                `;
            }

            resultBox.className = `result-box ${statusClass}`;
            resultBox.innerHTML = `
                <div class="result-title" style="color: ${statusColor}">
                    <span>${statusText}</span>
                    <span>Akurasi: ${data.accuracy}%</span>
                </div>
                <div class="badge-bar" style="display:flex;gap:8px;margin-bottom:15px;flex-wrap:wrap">
                    <span class="badge" style="background:rgba(255,215,0,0.1);color:var(--yellow-main);border:1px solid rgba(255,215,0,0.25);padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:4px">
                        🧬 Cosine Similarity: ${(data.similarity * 100).toFixed(1)}%
                    </span>
                    ${data.is_outlier 
                        ? `<span class="badge" style="background:rgba(255,71,87,0.1);color:var(--danger);border:1px solid rgba(255,71,87,0.25);padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:4px">💡 Data Asing (Outlier)</span>`
                        : `<span class="badge" style="background:rgba(46,204,113,0.1);color:var(--success);border:1px solid rgba(46,204,113,0.25);padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:4px">🎯 Klasifikasi Aman</span>`
                    }
                    ${data.is_trap 
                        ? `<span class="badge" style="background:rgba(230,126,34,0.15);color:#e67e22;border:1px solid rgba(230,126,34,0.25);padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:4px">⚠️ Trap Image Mode</span>`
                        : ''
                    }
                    ${data.is_dark 
                        ? `<span class="badge" style="background:rgba(230,126,34,0.1);color:#e67e22;border:1px solid rgba(230,126,34,0.25);padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:4px">🌙 Low Light (Cahaya Rendah)</span>`
                        : ''
                    }
                    ${data.is_grayscale 
                        ? `<span class="badge" style="background:rgba(149,165,166,0.15);color:#bdc3c7;border:1px solid rgba(149,165,166,0.25);padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;gap:4px">⚪ Monokrom (Hitam Putih)</span>`
                        : ''
                    }
                </div>
                
                ${(data.is_dark || data.is_grayscale) 
                    ? `
                    <div style="background: rgba(230,126,34,0.1); border: 1px dashed rgba(230,126,34,0.3); border-radius: 8px; padding: 12px; margin-bottom: 15px; font-size: 12px; color: #f39c12; line-height: 1.5; text-align: left;">
                        <b>⚠️ Rekomendasi Kondisi Deteksi:</b><br/>
                        ${data.is_dark ? '• Cahaya terdeteksi rendah (kecerahan rata-rata: ' + data.avg_brightness + '/255). Hal ini memicu noise sensor kamera yang dapat mengganggu keakuratan forensik AI.<br/>' : ''}
                        ${data.is_grayscale ? '• Gambar monokrom/hitam-putih terdeteksi. Kehilangan informasi kromatik (saluran warna RGB) secara drastis dapat menurunkan performa klasifikasi model AI.<br/>' : ''}
                        <i style="display:block;margin-top:6px;color:rgba(255,255,255,0.7)">Disarankan untuk melakukan scan ulang menggunakan foto dengan pencahayaan cukup dan penuh warna (Full RGB).</i>
                    </div>
                    ` 
                    : ''
                }

                ${logsHtml}

                <div class="details-grid">
                    <div class="detail-item">
                        <div class="detail-label">Nama File</div>
                        <div class="detail-value">${data.filename}</div>
                    </div>
                    <div class="detail-item">
                        <div class="detail-label">Tipe</div>
                        <div class="detail-value">${data.type.toUpperCase()}</div>
                    </div>
                    <div class="detail-item">
                        <div class="detail-label">Ukuran File</div>
                        <div class="detail-value">${data.file_size}</div>
                    </div>
                    <div class="detail-item">
                        <div class="detail-label">Sumber Deteksi</div>
                        <div class="detail-value" style="font-size:12px">${data.source}</div>
                    </div>
                    <div class="detail-item">
                        <div class="detail-label">Tanggal Scan</div>
                        <div class="detail-value">${data.date}</div>
                    </div>
                    <div class="detail-item">
                        <div class="detail-label">Keakuratan</div>
                        <div class="detail-value" style="color: ${statusColor}">${data.accuracy}%</div>
                    </div>
                </div>
                <div style="margin-top:15px;padding-top:15px;border-top:1px solid rgba(255,255,255,0.2)">
                    <p style="margin-bottom:10px;color:var(--yellow-main)">Apakah hasil ini benar?</p>
                    <button class="btn-scan" style="padding:8px 25px;font-size:14px;margin-right:10px" onclick="confirmSingleResult('${data.filename}', '${data.is_ai ? "AI" : "REAL"}', '${data.accuracy}', '${data.feedback_id || ""}', this)">✅ Benar</button>
                    <button class="btn-scan" style="padding:8px 25px;font-size:14px" onclick="correctSingleResult('${data.filename}', '${data.is_ai ? "AI" : "REAL"}', '${data.accuracy}', '${data.feedback_id || ""}', this)">❌ Salah</button>
                    <div id="single-correction-area" style="margin-top:10px"></div>
                </div>
            `;
            updateGlobalStats();
        } else {
            resultBox.innerHTML = `<h3 style="color: var(--danger)">Error: ${data.detail}</h3>`;
        }
    } catch (err) {
        resultBox.innerHTML = "<h3 style='color: var(--danger)'>Gagal terhubung ke server Backend.</h3>";
    }
}