{% extends "base.html" %}
{% block title %}AUTARCH — Forensics Toolkit{% endblock %}
{% block content %}
<div class="page-header">
    <h1>Forensics Toolkit</h1>
    <p style="margin:0;font-size:0.85rem;color:var(--text-secondary)">
        File hashing, data carving, timeline analysis, and evidence chain of custody.
    </p>
</div>

<!-- Tab Bar -->
<div class="tab-bar">
    <button class="tab active" data-tab-group="forensics" data-tab="image" onclick="showTab('forensics','image')">Image</button>
    <button class="tab" data-tab-group="forensics" data-tab="carve" onclick="showTab('forensics','carve')">Carve</button>
    <button class="tab" data-tab-group="forensics" data-tab="timeline" onclick="showTab('forensics','timeline')">Timeline</button>
    <button class="tab" data-tab-group="forensics" data-tab="evidence" onclick="showTab('forensics','evidence')">Evidence</button>
</div>

<!-- ══ Image Tab ══ -->
<div class="tab-content active" data-tab-group="forensics" data-tab="image">

    <!-- Hash File -->
    <div class="section">
        <h2>Hash File</h2>
        <div class="form-row">
            <div class="form-group" style="flex:2">
                <label>File Path</label>
                <input type="text" id="for-hash-path" placeholder="/path/to/evidence/file.dd">
            </div>
        </div>
        <div class="tool-actions">
            <button id="btn-for-hash" class="btn btn-primary" onclick="forHashFile()">Compute Hashes</button>
        </div>
        <div id="for-hash-result" style="display:none">
            <table class="data-table" style="max-width:700px">
                <tbody>
                    <tr><td style="width:80px;font-weight:600">MD5</td><td id="for-hash-md5" style="font-family:monospace;font-size:0.85rem;word-break:break-all">—</td></tr>
                    <tr><td style="font-weight:600">SHA1</td><td id="for-hash-sha1" style="font-family:monospace;font-size:0.85rem;word-break:break-all">—</td></tr>
                    <tr><td style="font-weight:600">SHA256</td><td id="for-hash-sha256" style="font-family:monospace;font-size:0.85rem;word-break:break-all">—</td></tr>
                </tbody>
            </table>
        </div>
    </div>

    <!-- Verify Hash -->
    <div class="section">
        <h2>Verify Hash</h2>
        <div class="form-row">
            <div class="form-group" style="flex:2">
                <label>File Path</label>
                <input type="text" id="for-verify-path" placeholder="/path/to/evidence/file.dd">
            </div>
            <div class="form-group" style="flex:2">
                <label>Expected Hash (MD5, SHA1, or SHA256)</label>
                <input type="text" id="for-verify-hash" placeholder="e3b0c44298fc1c149afbf4c8996fb924...">
            </div>
        </div>
        <div class="tool-actions">
            <button id="btn-for-verify" class="btn btn-primary" onclick="forVerifyHash()">Verify</button>
        </div>
        <div id="for-verify-result" class="progress-text"></div>
    </div>

    <!-- Disk Image Creator -->
    <div class="section">
        <h2>Disk Image Creator</h2>
        <div class="form-row">
            <div class="form-group">
                <label>Source (device or file)</label>
                <input type="text" id="for-image-source" placeholder="/dev/sda1 or /path/to/source">
            </div>
            <div class="form-group">
                <label>Output File</label>
                <input type="text" id="for-image-output" placeholder="/path/to/output/image.dd">
            </div>
        </div>
        <div class="tool-actions">
            <button id="btn-for-image" class="btn btn-primary" onclick="forCreateImage()">Create Image</button>
        </div>
        <div id="for-image-status" class="progress-text"></div>
        <pre class="output-panel scrollable" id="for-image-output-log" style="max-height:200px;display:none"></pre>
    </div>
</div>

<!-- ══ Carve Tab ══ -->
<div class="tab-content" data-tab-group="forensics" data-tab="carve">

    <!-- Carve Form -->
    <div class="section">
        <h2>File Carving</h2>
        <div class="form-row">
            <div class="form-group" style="flex:2">
                <label>Source File</label>
                <input type="text" id="for-carve-source" placeholder="/path/to/disk/image.dd">
            </div>
        </div>
        <div class="form-row">
            <div class="form-group">
                <label>File Types</label>
                <div style="display:flex;gap:12px;flex-wrap:wrap;margin-top:4px">
                    <label style="font-size:0.85rem;cursor:pointer"><input type="checkbox" class="for-carve-type" value="jpg" checked> JPG</label>
                    <label style="font-size:0.85rem;cursor:pointer"><input type="checkbox" class="for-carve-type" value="png" checked> PNG</label>
                    <label style="font-size:0.85rem;cursor:pointer"><input type="checkbox" class="for-carve-type" value="pdf" checked> PDF</label>
                    <label style="font-size:0.85rem;cursor:pointer"><input type="checkbox" class="for-carve-type" value="doc"> DOC/DOCX</label>
                    <label style="font-size:0.85rem;cursor:pointer"><input type="checkbox" class="for-carve-type" value="zip"> ZIP</label>
                    <label style="font-size:0.85rem;cursor:pointer"><input type="checkbox" class="for-carve-type" value="sqlite"> SQLite</label>
                    <label style="font-size:0.85rem;cursor:pointer"><input type="checkbox" class="for-carve-type" value="exe"> EXE/PE</label>
                    <label style="font-size:0.85rem;cursor:pointer"><input type="checkbox" class="for-carve-type" value="elf"> ELF</label>
                </div>
            </div>
            <div class="form-group" style="max-width:160px">
                <label>Max Files</label>
                <input type="number" id="for-carve-max" value="100" min="1" max="10000">
            </div>
        </div>
        <div class="tool-actions">
            <button id="btn-for-carve" class="btn btn-primary" onclick="forCarve()">Carve</button>
        </div>
        <div id="for-carve-status" class="progress-text"></div>
    </div>

    <!-- Carved Files Table -->
    <div class="section">
        <h2>Carved Files</h2>
        <div class="tool-actions">
            <button class="btn btn-small" onclick="forExportCarved()">Export List</button>
            <button class="btn btn-small" onclick="forClearCarved()">Clear</button>
        </div>
        <table class="data-table">
            <thead>
                <tr>
                    <th>Name</th>
                    <th>Type</th>
                    <th>Offset</th>
                    <th>Size</th>
                    <th>MD5</th>
                </tr>
            </thead>
            <tbody id="for-carved-body">
                <tr><td colspan="5" class="empty-state">No carved files. Run file carving first.</td></tr>
            </tbody>
        </table>
    </div>
</div>

<!-- ══ Timeline Tab ══ -->
<div class="tab-content" data-tab-group="forensics" data-tab="timeline">

    <!-- Timeline Builder -->
    <div class="section">
        <h2>Timeline Builder</h2>
        <div class="form-row">
            <div class="form-group" style="flex:2">
                <label>Directory Path</label>
                <input type="text" id="for-timeline-path" placeholder="/path/to/evidence/directory">
            </div>
        </div>
        <div class="tool-actions">
            <button id="btn-for-timeline" class="btn btn-primary" onclick="forBuildTimeline()">Build Timeline</button>
        </div>
        <div id="for-timeline-status" class="progress-text"></div>
    </div>

    <!-- Events Table -->
    <div class="section">
        <h2>Events</h2>
        <div class="tool-actions">
            <button class="btn btn-small" onclick="forSortTimeline('timestamp')">Sort by Time</button>
            <button class="btn btn-small" onclick="forSortTimeline('type')">Sort by Type</button>
            <button class="btn btn-small" onclick="forSortTimeline('size')">Sort by Size</button>
            <button class="btn btn-small" onclick="forExportTimeline()">Export CSV</button>
        </div>
        <table class="data-table">
            <thead>
                <tr>
                    <th style="cursor:pointer" onclick="forSortTimeline('timestamp')">Timestamp</th>
                    <th style="cursor:pointer" onclick="forSortTimeline('type')">Type</th>
                    <th style="cursor:pointer" onclick="forSortTimeline('file')">File</th>
                    <th style="cursor:pointer" onclick="forSortTimeline('size')">Size</th>
                </tr>
            </thead>
            <tbody id="for-timeline-body">
                <tr><td colspan="4" class="empty-state">No timeline data. Build a timeline from a directory.</td></tr>
            </tbody>
        </table>
    </div>
</div>

<!-- ══ Evidence Tab ══ -->
<div class="tab-content" data-tab-group="forensics" data-tab="evidence">

    <!-- Evidence Files -->
    <div class="section">
        <h2>Evidence Files</h2>
        <div class="tool-actions">
            <button class="btn btn-small" onclick="forRefreshEvidence()">Refresh</button>
        </div>
        <div id="for-evidence-files">
            <p class="empty-state" style="padding:12px;font-size:0.85rem">No evidence files registered.</p>
        </div>
    </div>

    <!-- Carved Files List -->
    <div class="section">
        <h2>Carved Files</h2>
        <div id="for-evidence-carved">
            <p class="empty-state" style="padding:12px;font-size:0.85rem">No carved files. Use the Carve tab to extract files.</p>
        </div>
    </div>

    <!-- Chain of Custody -->
    <div class="section">
        <h2>Chain of Custody Log</h2>
        <div class="tool-actions">
            <button class="btn btn-small" onclick="forRefreshCustody()">Refresh</button>
            <button class="btn btn-small" onclick="forExportCustody()">Export</button>
        </div>
        <table class="data-table">
            <thead>
                <tr>
                    <th>Timestamp</th>
                    <th>Action</th>
                    <th>Target</th>
                    <th>Details</th>
                    <th>Hash</th>
                </tr>
            </thead>
            <tbody id="for-custody-body">
                <tr><td colspan="5" class="empty-state">No chain of custody entries.</td></tr>
            </tbody>
        </table>
    </div>
</div>

<script>
/* ── Forensics Toolkit ── */
function esc(s) { return String(s).replace(/&/g,'&amp;').replace(/</g,'&lt;'); }

var forCarvedFiles = [];
var forTimelineEvents = [];
var forTimelineSortKey = 'timestamp';
var forTimelineSortAsc = true;

/* ── Image Tab ── */
function forHashFile() {
    var path = document.getElementById('for-hash-path').value.trim();
    if (!path) return;
    var btn = document.getElementById('btn-for-hash');
    setLoading(btn, true);
    postJSON('/forensics/hash', {path: path}).then(function(data) {
        setLoading(btn, false);
        if (data.error) {
            document.getElementById('for-hash-result').style.display = 'none';
            return;
        }
        document.getElementById('for-hash-result').style.display = '';
        document.getElementById('for-hash-md5').textContent = data.md5 || '—';
        document.getElementById('for-hash-sha1').textContent = data.sha1 || '—';
        document.getElementById('for-hash-sha256').textContent = data.sha256 || '—';
        forLogCustody('hash', path, 'Computed hashes', data.sha256 || '');
        halAnalyze('Digital Forensics', JSON.stringify(data, null, 2), 'forensics', 'analyze');
    }).catch(function() { setLoading(btn, false); });
}

function forVerifyHash() {
    var path = document.getElementById('for-verify-path').value.trim();
    var expected = document.getElementById('for-verify-hash').value.trim();
    if (!path || !expected) return;
    var btn = document.getElementById('btn-for-verify');
    setLoading(btn, true);
    postJSON('/forensics/verify', {path: path, expected: expected}).then(function(data) {
        setLoading(btn, false);
        var el = document.getElementById('for-verify-result');
        if (data.error) {
            el.textContent = 'Error: ' + data.error;
            el.style.color = 'var(--danger)';
            return;
        }
        if (data.match) {
            el.textContent = 'MATCH — Hash verified (' + (data.algorithm || 'unknown') + ')';
            el.style.color = 'var(--success,#4ade80)';
        } else {
            el.textContent = 'MISMATCH — Expected: ' + expected + ', Got: ' + (data.actual || '?');
            el.style.color = 'var(--danger)';
        }
        forLogCustody('verify', path, data.match ? 'Hash verified' : 'Hash mismatch', expected);
        halAnalyze('Digital Forensics', JSON.stringify(data, null, 2), 'forensics', 'analyze');
    }).catch(function() { setLoading(btn, false); });
}

function forCreateImage() {
    var source = document.getElementById('for-image-source').value.trim();
    var output = document.getElementById('for-image-output').value.trim();
    if (!source || !output) return;
    var btn = document.getElementById('btn-for-image');
    var log = document.getElementById('for-image-output-log');
    setLoading(btn, true);
    log.style.display = 'block';
    log.textContent = '';
    document.getElementById('for-image-status').textContent = 'Creating disk image...';
    postJSON('/forensics/create-image', {source: source, output: output}).then(function(data) {
        setLoading(btn, false);
        if (data.error) {
            document.getElementById('for-image-status').textContent = 'Error: ' + data.error;
            log.textContent = data.error;
            return;
        }
        document.getElementById('for-image-status').textContent = 'Image created successfully';
        var lines = [];
        if (data.size) lines.push('Size: ' + data.size);
        if (data.hash) lines.push('SHA256: ' + data.hash);
        if (data.duration) lines.push('Duration: ' + data.duration + 's');
        log.textContent = lines.join('\n') || 'Done.';
        forLogCustody('image', output, 'Disk image created from ' + source, data.hash || '');
        halAnalyze('Digital Forensics', JSON.stringify(data, null, 2), 'forensics', 'analyze');
    }).catch(function() { setLoading(btn, false); });
}

/* ── Carve Tab ── */
function forGetCarveTypes() {
    var checked = [];
    document.querySelectorAll('.for-carve-type:checked').forEach(function(cb) {
        checked.push(cb.value);
    });
    return checked;
}

function forCarve() {
    var source = document.getElementById('for-carve-source').value.trim();
    if (!source) return;
    var types = forGetCarveTypes();
    if (!types.length) { document.getElementById('for-carve-status').textContent = 'Select at least one file type'; return; }
    var maxFiles = parseInt(document.getElementById('for-carve-max').value) || 100;
    var btn = document.getElementById('btn-for-carve');
    setLoading(btn, true);
    document.getElementById('for-carve-status').textContent = 'Carving files from image...';
    postJSON('/forensics/carve', {source: source, types: types, max_files: maxFiles}).then(function(data) {
        setLoading(btn, false);
        if (data.error) {
            document.getElementById('for-carve-status').textContent = 'Error: ' + data.error;
            return;
        }
        forCarvedFiles = data.files || [];
        document.getElementById('for-carve-status').textContent = 'Carved ' + forCarvedFiles.length + ' file(s)';
        forRenderCarved();
        forLogCustody('carve', source, 'Carved ' + forCarvedFiles.length + ' files (' + types.join(',') + ')', '');
        halAnalyze('Digital Forensics', JSON.stringify(data, null, 2), 'forensics', 'analyze');
    }).catch(function() { setLoading(btn, false); });
}

function forRenderCarved() {
    var tbody = document.getElementById('for-carved-body');
    if (!forCarvedFiles.length) {
        tbody.innerHTML = '<tr><td colspan="5" class="empty-state">No carved files.</td></tr>';
        return;
    }
    var html = '';
    forCarvedFiles.forEach(function(f) {
        html += '<tr>'
            + '<td>' + esc(f.name || '—') + '</td>'
            + '<td>' + esc(f.type || '—') + '</td>'
            + '<td style="font-family:monospace;font-size:0.8rem">' + esc(f.offset != null ? '0x' + f.offset.toString(16) : '—') + '</td>'
            + '<td>' + esc(forFormatSize(f.size)) + '</td>'
            + '<td style="font-family:monospace;font-size:0.8rem">' + esc(f.md5 || '—') + '</td>'
            + '</tr>';
    });
    tbody.innerHTML = html;
}

function forFormatSize(bytes) {
    if (bytes == null) return '—';
    if (bytes < 1024) return bytes + ' B';
    if (bytes < 1048576) return (bytes / 1024).toFixed(1) + ' KB';
    if (bytes < 1073741824) return (bytes / 1048576).toFixed(1) + ' MB';
    return (bytes / 1073741824).toFixed(2) + ' GB';
}

function forExportCarved() {
    var blob = new Blob([JSON.stringify(forCarvedFiles, null, 2)], {type: 'application/json'});
    var a = document.createElement('a');
    a.href = URL.createObjectURL(blob);
    a.download = 'carved_files.json';
    a.click();
}

function forClearCarved() {
    forCarvedFiles = [];
    forRenderCarved();
}

/* ── Timeline Tab ── */
function forBuildTimeline() {
    var path = document.getElementById('for-timeline-path').value.trim();
    if (!path) return;
    var btn = document.getElementById('btn-for-timeline');
    setLoading(btn, true);
    document.getElementById('for-timeline-status').textContent = 'Building timeline...';
    postJSON('/forensics/timeline', {path: path}).then(function(data) {
        setLoading(btn, false);
        if (data.error) {
            document.getElementById('for-timeline-status').textContent = 'Error: ' + data.error;
            return;
        }
        forTimelineEvents = data.events || [];
        document.getElementById('for-timeline-status').textContent = 'Timeline built — ' + forTimelineEvents.length + ' event(s)';
        forRenderTimeline();
        forLogCustody('timeline', path, 'Built timeline with ' + forTimelineEvents.length + ' events', '');
        halAnalyze('Digital Forensics', JSON.stringify(data, null, 2), 'forensics', 'analyze');
    }).catch(function() { setLoading(btn, false); });
}

function forSortTimeline(key) {
    if (forTimelineSortKey === key) {
        forTimelineSortAsc = !forTimelineSortAsc;
    } else {
        forTimelineSortKey = key;
        forTimelineSortAsc = true;
    }
    forTimelineEvents.sort(function(a, b) {
        var va = a[key] || '', vb = b[key] || '';
        if (key === 'size') { va = Number(va) || 0; vb = Number(vb) || 0; }
        else { va = String(va).toLowerCase(); vb = String(vb).toLowerCase(); }
        if (va < vb) return forTimelineSortAsc ? -1 : 1;
        if (va > vb) return forTimelineSortAsc ? 1 : -1;
        return 0;
    });
    forRenderTimeline();
}

function forRenderTimeline() {
    var tbody = document.getElementById('for-timeline-body');
    if (!forTimelineEvents.length) {
        tbody.innerHTML = '<tr><td colspan="4" class="empty-state">No timeline data.</td></tr>';
        return;
    }
    var html = '';
    forTimelineEvents.forEach(function(e) {
        var typeCls = '';
        var t = (e.type || '').toLowerCase();
        if (t === 'created') typeCls = 'color:var(--success,#4ade80)';
        else if (t === 'modified') typeCls = 'color:var(--warning,#f59e0b)';
        else if (t === 'deleted') typeCls = 'color:var(--danger)';
        else if (t === 'accessed') typeCls = 'color:var(--accent)';
        html += '<tr>'
            + '<td style="font-family:monospace;font-size:0.8rem;white-space:nowrap">' + esc(e.timestamp || '—') + '</td>'
            + '<td><span style="' + typeCls + '">' + esc(e.type || '—') + '</span></td>'
            + '<td style="max-width:350px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap">' + esc(e.file || '—') + '</td>'
            + '<td>' + esc(forFormatSize(e.size)) + '</td>'
            + '</tr>';
    });
    tbody.innerHTML = html;
}

function forExportTimeline() {
    if (!forTimelineEvents.length) return;
    var csv = 'Timestamp,Type,File,Size\n';
    forTimelineEvents.forEach(function(e) {
        csv += '"' + (e.timestamp || '') + '","' + (e.type || '') + '","' + (e.file || '').replace(/"/g, '""') + '",' + (e.size || 0) + '\n';
    });
    var blob = new Blob([csv], {type: 'text/csv'});
    var a = document.createElement('a');
    a.href = URL.createObjectURL(blob);
    a.download = 'forensic_timeline.csv';
    a.click();
}

/* ── Evidence Tab ── */
var forCustodyLog = [];

function forRefreshEvidence() {
    fetchJSON('/forensics/evidence').then(function(data) {
        var container = document.getElementById('for-evidence-files');
        var files = data.files || [];
        if (!files.length) {
            container.innerHTML = '<p class="empty-state" style="padding:12px;font-size:0.85rem">No evidence files registered.</p>';
        } else {
            var html = '<table class="data-table"><thead><tr><th>File</th><th>Size</th><th>Hash</th><th>Added</th></tr></thead><tbody>';
            files.forEach(function(f) {
                html += '<tr>'
                    + '<td>' + esc(f.name || '—') + '</td>'
                    + '<td>' + esc(forFormatSize(f.size)) + '</td>'
                    + '<td style="font-family:monospace;font-size:0.8rem;max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap">' + esc(f.hash || '—') + '</td>'
                    + '<td style="font-size:0.8rem">' + esc(f.added || '—') + '</td>'
                    + '</tr>';
            });
            html += '</tbody></table>';
            container.innerHTML = html;
        }

        /* Also update carved files in evidence view */
        var carvedContainer = document.getElementById('for-evidence-carved');
        var carved = data.carved || forCarvedFiles;
        if (!carved.length) {
            carvedContainer.innerHTML = '<p class="empty-state" style="padding:12px;font-size:0.85rem">No carved files.</p>';
        } else {
            var chtml = '<table class="data-table"><thead><tr><th>Name</th><th>Type</th><th>Size</th><th>MD5</th></tr></thead><tbody>';
            carved.forEach(function(f) {
                chtml += '<tr>'
                    + '<td>' + esc(f.name || '—') + '</td>'
                    + '<td>' + esc(f.type || '—') + '</td>'
                    + '<td>' + esc(forFormatSize(f.size)) + '</td>'
                    + '<td style="font-family:monospace;font-size:0.8rem">' + esc(f.md5 || '—') + '</td>'
                    + '</tr>';
            });
            chtml += '</tbody></table>';
            carvedContainer.innerHTML = chtml;
        }
    }).catch(function() {});

    forRefreshCustody();
}

function forLogCustody(action, target, details, hash) {
    var entry = {
        timestamp: new Date().toISOString().replace('T', ' ').substring(0, 19),
        action: action,
        target: target,
        details: details,
        hash: hash
    };
    forCustodyLog.push(entry);
    postJSON('/forensics/custody/log', entry).catch(function() {});
    forRenderCustody();
}

function forRefreshCustody() {
    fetchJSON('/forensics/custody').then(function(data) {
        if (data.entries && data.entries.length) {
            forCustodyLog = data.entries;
        }
        forRenderCustody();
    }).catch(function() { forRenderCustody(); });
}

function forRenderCustody() {
    var tbody = document.getElementById('for-custody-body');
    if (!forCustodyLog.length) {
        tbody.innerHTML = '<tr><td colspan="5" class="empty-state">No chain of custody entries.</td></tr>';
        return;
    }
    var html = '';
    forCustodyLog.forEach(function(e) {
        html += '<tr>'
            + '<td style="font-size:0.8rem;white-space:nowrap">' + esc(e.timestamp || '—') + '</td>'
            + '<td><span class="badge" style="background:rgba(99,102,241,0.15);color:var(--accent)">' + esc(e.action || '—') + '</span></td>'
            + '<td style="max-width:250px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap">' + esc(e.target || '—') + '</td>'
            + '<td style="font-size:0.85rem">' + esc(e.details || '—') + '</td>'
            + '<td style="font-family:monospace;font-size:0.75rem;max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap">' + esc(e.hash || '—') + '</td>'
            + '</tr>';
    });
    tbody.innerHTML = html;
}

function forExportCustody() {
    var blob = new Blob([JSON.stringify(forCustodyLog, null, 2)], {type: 'application/json'});
    var a = document.createElement('a');
    a.href = URL.createObjectURL(blob);
    a.download = 'chain_of_custody.json';
    a.click();
}

/* ── Init ── */
document.addEventListener('DOMContentLoaded', function() {
    forRefreshEvidence();
});
</script>
{% endblock %}
