{% extends "base.html" %}

{% block title %}Tools - Stegasoo{% endblock %}

{% block content %}
<div class="row justify-content-center">
    <div class="col-lg-10">
        <h4 class="mb-4"><i class="bi bi-tools me-2"></i>Image Security Toolkit</h4>

        <!-- Tool Tabs -->
        <ul class="nav nav-pills mb-4" role="tablist">
            <li class="nav-item" role="presentation">
                <button class="nav-link active" data-bs-toggle="pill" data-bs-target="#capacity" type="button">
                    <i class="bi bi-rulers me-1"></i>Capacity
                </button>
            </li>
            <li class="nav-item" role="presentation">
                <button class="nav-link" data-bs-toggle="pill" data-bs-target="#exif" type="button">
                    <i class="bi bi-card-text me-1"></i>EXIF Editor
                </button>
            </li>
            <li class="nav-item" role="presentation">
                <button class="nav-link" data-bs-toggle="pill" data-bs-target="#peek" type="button">
                    <i class="bi bi-search me-1"></i>Peek
                </button>
            </li>
        </ul>

        <!-- Tab Content -->
        <div class="tab-content">

            <!-- Capacity Calculator -->
            <div class="tab-pane fade show active" id="capacity" role="tabpanel">
                <div class="card">
                    <div class="card-body">
                        <p class="text-muted mb-3">Check how much data can be hidden in an image.</p>

                        <div class="mb-3">
                            <input type="file" class="form-control" id="capacityFile" accept="image/*">
                        </div>

                        <div id="capacityResult" class="d-none">
                            <table class="table table-sm table-dark mb-0">
                                <tbody>
                                    <tr>
                                        <td class="text-muted">Image</td>
                                        <td id="capFilename" class="font-monospace"></td>
                                    </tr>
                                    <tr>
                                        <td class="text-muted">Dimensions</td>
                                        <td><span id="capDimensions"></span> (<span id="capMegapixels"></span> MP)</td>
                                    </tr>
                                    <tr>
                                        <td class="text-muted">LSB Capacity</td>
                                        <td id="capLsb" class="text-success font-monospace"></td>
                                    </tr>
                                    <tr>
                                        <td class="text-muted">DCT Capacity</td>
                                        <td id="capDct" class="font-monospace"></td>
                                    </tr>
                                </tbody>
                            </table>
                        </div>
                    </div>
                </div>
            </div>

            <!-- EXIF Editor -->
            <div class="tab-pane fade" id="exif" role="tabpanel">
                <div class="card">
                    <div class="card-body">
                        <p class="text-muted mb-3">View, edit, or remove image metadata (EXIF, GPS, camera info).</p>

                        <div class="mb-3">
                            <input type="file" class="form-control" id="exifFile" accept="image/*">
                        </div>

                        <div id="exifEditor" class="d-none">
                            <div class="row mb-3">
                                <!-- Thumbnail -->
                                <div class="col-auto">
                                    <img id="exifThumb" class="rounded" style="max-height: 120px; max-width: 120px; object-fit: cover;">
                                </div>
                                <!-- File info -->
                                <div class="col">
                                    <h6 id="exifFilename" class="mb-1"></h6>
                                    <small class="text-muted"><span id="exifFieldCount">0</span> metadata fields</small>
                                    <div id="exifNotEditable" class="text-warning small d-none">
                                        <i class="bi bi-exclamation-triangle me-1"></i>Non-JPEG: read-only
                                    </div>
                                </div>
                            </div>

                            <!-- EXIF Fields Table -->
                            <div class="table-responsive" style="max-height: 300px; overflow-y: auto;">
                                <table class="table table-sm table-dark table-hover mb-0">
                                    <thead class="sticky-top bg-dark">
                                        <tr>
                                            <th style="width: 35%">Field</th>
                                            <th>Value</th>
                                            <th style="width: 40px"></th>
                                        </tr>
                                    </thead>
                                    <tbody id="exifTable"></tbody>
                                </table>
                            </div>

                            <div id="exifEmpty" class="text-muted text-center py-4 d-none">
                                <i class="bi bi-inbox"></i> No metadata found
                            </div>

                            <!-- Action Buttons -->
                            <div class="d-flex gap-2 mt-3 pt-3 border-top border-secondary">
                                <button type="button" class="btn btn-outline-danger" id="exifClearAll">
                                    <i class="bi bi-trash me-1"></i>Clear All
                                </button>
                                <div class="ms-auto d-flex gap-2">
                                    <button type="button" class="btn btn-outline-secondary" id="exifDiscard">
                                        Discard
                                    </button>
                                    <button type="button" class="btn btn-primary" id="exifSave" disabled>
                                        <i class="bi bi-download me-1"></i>Save Changes
                                    </button>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>

            <!-- Peek (Header Detection) -->
            <div class="tab-pane fade" id="peek" role="tabpanel">
                <div class="card">
                    <div class="card-body">
                        <p class="text-muted mb-3">Check if an image contains Stegasoo hidden data (without decrypting).</p>

                        <div class="mb-3">
                            <input type="file" class="form-control" id="peekFile" accept="image/*">
                        </div>

                        <div id="peekResult" class="d-none">
                            <div id="peekFound" class="alert alert-success d-none">
                                <i class="bi bi-check-circle me-2"></i>
                                <strong>Stegasoo data detected!</strong>
                                <br><span class="text-muted">Mode: <span id="peekMode" class="font-monospace"></span></span>
                            </div>
                            <div id="peekNotFound" class="alert alert-secondary d-none">
                                <i class="bi bi-x-circle me-2"></i>
                                No Stegasoo header detected in this image.
                            </div>
                        </div>
                    </div>
                </div>
            </div>

        </div>
    </div>
</div>
{% endblock %}

{% block scripts %}
<script>
// Capacity Calculator
document.getElementById('capacityFile')?.addEventListener('change', async function() {
    const file = this.files[0];
    if (!file) return;

    const formData = new FormData();
    formData.append('image', file);

    try {
        const res = await fetch('/api/tools/capacity', { method: 'POST', body: formData });
        const data = await res.json();

        if (data.success) {
            document.getElementById('capFilename').textContent = data.filename;
            document.getElementById('capDimensions').textContent = `${data.width} x ${data.height}`;
            document.getElementById('capMegapixels').textContent = data.megapixels;
            document.getElementById('capLsb').textContent = `${data.lsb.capacity_kb.toFixed(1)} KB`;
            document.getElementById('capDct').textContent = data.dct.available
                ? `${data.dct.capacity_kb.toFixed(1)} KB`
                : 'N/A (scipy required)';
            document.getElementById('capacityResult').classList.remove('d-none');
        }
    } catch (err) {
        console.error(err);
    }
});

// EXIF Editor
let exifOriginalData = {};
let exifCurrentData = {};
let exifEditable = false;
let exifCurrentFile = null;

document.getElementById('exifFile')?.addEventListener('change', async function() {
    const file = this.files[0];
    if (!file) return;

    exifCurrentFile = file;
    const formData = new FormData();
    formData.append('image', file);

    try {
        const res = await fetch('/api/tools/exif', { method: 'POST', body: formData });
        const data = await res.json();

        if (data.success) {
            // Show thumbnail
            const reader = new FileReader();
            reader.onload = e => document.getElementById('exifThumb').src = e.target.result;
            reader.readAsDataURL(file);

            // Store data
            exifOriginalData = JSON.parse(JSON.stringify(data.exif));
            exifCurrentData = JSON.parse(JSON.stringify(data.exif));
            exifEditable = data.editable;

            // Update UI
            document.getElementById('exifFilename').textContent = data.filename;
            document.getElementById('exifFieldCount').textContent = data.field_count;
            document.getElementById('exifNotEditable').classList.toggle('d-none', data.editable);
            document.getElementById('exifEditor').classList.remove('d-none');

            renderExifTable();
            updateSaveButton();
        }
    } catch (err) {
        console.error(err);
    }
});

function renderExifTable() {
    const tbody = document.getElementById('exifTable');
    const empty = document.getElementById('exifEmpty');
    const entries = Object.entries(exifCurrentData).sort((a, b) => a[0].localeCompare(b[0]));

    if (entries.length === 0) {
        tbody.innerHTML = '';
        empty.classList.remove('d-none');
        return;
    }

    empty.classList.add('d-none');
    tbody.innerHTML = entries.map(([key, value]) => {
        // Format value for display
        let displayVal = value;
        if (typeof value === 'object') {
            displayVal = JSON.stringify(value);
        }
        if (typeof displayVal === 'string' && displayVal.length > 60) {
            displayVal = displayVal.substring(0, 57) + '...';
        }

        // Check if field is editable (common string fields)
        const editableFields = ['Make', 'Model', 'Software', 'Artist', 'Copyright', 'ImageDescription', 'DateTime', 'DateTimeOriginal', 'DateTimeDigitized', 'UserComment', 'LensMake', 'LensModel'];
        const canEdit = exifEditable && editableFields.includes(key) && typeof value === 'string';

        return `
            <tr data-field="${key}">
                <td class="text-muted small">${key}</td>
                <td class="font-monospace small">
                    ${canEdit
                        ? `<input type="text" class="form-control form-control-sm bg-dark text-light border-secondary exif-input"
                             value="${String(value).replace(/"/g, '&quot;')}" data-field="${key}">`
                        : `<span title="${String(displayVal)}">${displayVal}</span>`
                    }
                </td>
                <td>
                    ${canEdit
                        ? `<button class="btn btn-sm btn-outline-danger border-0 exif-delete" data-field="${key}" title="Remove">
                             <i class="bi bi-x"></i>
                           </button>`
                        : ''
                    }
                </td>
            </tr>
        `;
    }).join('');

    // Add event listeners for edits
    tbody.querySelectorAll('.exif-input').forEach(input => {
        input.addEventListener('input', function() {
            exifCurrentData[this.dataset.field] = this.value;
            updateSaveButton();
        });
    });

    tbody.querySelectorAll('.exif-delete').forEach(btn => {
        btn.addEventListener('click', function() {
            delete exifCurrentData[this.dataset.field];
            renderExifTable();
            updateSaveButton();
        });
    });
}

function updateSaveButton() {
    const changed = JSON.stringify(exifCurrentData) !== JSON.stringify(exifOriginalData);
    document.getElementById('exifSave').disabled = !changed;
}

// Clear All button
document.getElementById('exifClearAll')?.addEventListener('click', async function() {
    if (!exifCurrentFile) return;
    if (!confirm('Remove all metadata from this image?')) return;

    const formData = new FormData();
    formData.append('image', exifCurrentFile);
    formData.append('format', 'PNG');

    try {
        const res = await fetch('/api/tools/exif/clear', { method: 'POST', body: formData });
        if (res.ok) {
            const blob = await res.blob();
            const url = URL.createObjectURL(blob);
            const a = document.createElement('a');
            a.href = url;
            a.download = res.headers.get('Content-Disposition')?.split('filename=')[1]?.replace(/"/g, '') || 'clean.png';
            a.click();
            URL.revokeObjectURL(url);
        }
    } catch (err) {
        console.error(err);
    }
});

// Discard button
document.getElementById('exifDiscard')?.addEventListener('click', function() {
    exifCurrentData = JSON.parse(JSON.stringify(exifOriginalData));
    renderExifTable();
    updateSaveButton();
});

// Save button
document.getElementById('exifSave')?.addEventListener('click', async function() {
    if (!exifCurrentFile || !exifEditable) return;

    // Find what changed
    const updates = {};
    for (const [key, val] of Object.entries(exifCurrentData)) {
        if (exifOriginalData[key] !== val) {
            updates[key] = val;
        }
    }
    // Mark deleted fields
    for (const key of Object.keys(exifOriginalData)) {
        if (!(key in exifCurrentData)) {
            updates[key] = null;
        }
    }

    if (Object.keys(updates).length === 0) return;

    const formData = new FormData();
    formData.append('image', exifCurrentFile);
    formData.append('updates', JSON.stringify(updates));

    try {
        const res = await fetch('/api/tools/exif/update', { method: 'POST', body: formData });
        if (res.ok) {
            const blob = await res.blob();
            const url = URL.createObjectURL(blob);
            const a = document.createElement('a');
            a.href = url;
            a.download = res.headers.get('Content-Disposition')?.split('filename=')[1]?.replace(/"/g, '') || 'updated.jpg';
            a.click();
            URL.revokeObjectURL(url);

            // Update original to match current
            exifOriginalData = JSON.parse(JSON.stringify(exifCurrentData));
            updateSaveButton();
        } else {
            const err = await res.json();
            alert(err.error || 'Failed to save');
        }
    } catch (err) {
        console.error(err);
        alert('Failed to save changes');
    }
});

// Peek (Header Detection)
document.getElementById('peekFile')?.addEventListener('change', async function() {
    const file = this.files[0];
    if (!file) return;

    const formData = new FormData();
    formData.append('image', file);

    try {
        const res = await fetch('/api/tools/peek', { method: 'POST', body: formData });
        const data = await res.json();

        document.getElementById('peekResult').classList.remove('d-none');

        if (data.has_stegasoo) {
            document.getElementById('peekFound').classList.remove('d-none');
            document.getElementById('peekNotFound').classList.add('d-none');
            document.getElementById('peekMode').textContent = data.mode?.toUpperCase() || 'Unknown';
        } else {
            document.getElementById('peekFound').classList.add('d-none');
            document.getElementById('peekNotFound').classList.remove('d-none');
        }
    } catch (err) {
        console.error(err);
    }
});
</script>
{% endblock %}