{{define "app_import"}}
{{template "layout_start" .}}

<div class="page-header">
    <div style="display:flex;align-items:center;gap:1rem">
        <a href="/stacks" class="btn btn-sm btn-outline">&larr; Alkalmazások</a>
        <h2>Alkalmazás importálás</h2>
    </div>
</div>

<!-- Browser .fab upload (v0.128.0) — chunked, because the Cloudflare tunnel caps request bodies (~100 MB) -->
<div class="card" style="max-width:900px;margin-bottom:1rem">
    <div id="fabUploadZone" style="border:1px dashed var(--line);border-radius:var(--radius);padding:1.25rem;text-align:center;cursor:pointer" onclick="fabPick()">
        <p style="color:var(--text-2);margin:0 0 .75rem">.fab csomag feltöltése &mdash; húzza ide, vagy válassza ki a fájlt</p>
        <button type="button" class="btn btn-sm btn-outline">Fájl kiválasztása</button>
        <input type="file" id="fabFileInput" accept=".fab" style="display:none">
    </div>
    <div id="fabUpProgress" style="display:none;margin-top:1rem">
        <div style="display:flex;justify-content:space-between;align-items:center;gap:1rem">
            <span id="fabUpText" style="color:var(--text-2)">Feltöltés: 0%</span>
            <button type="button" class="btn btn-sm btn-outline" onclick="fabCancel()">Megszakítás</button>
        </div>
        <div style="background:var(--bg-2);border-radius:var(--radius);height:6px;margin-top:.5rem;overflow:hidden">
            <div id="fabUpBar" style="background:var(--blue);height:100%;width:0%"></div>
        </div>
    </div>
    <div id="fabUpError" style="display:none;color:var(--crit);margin-top:.75rem"></div>
</div>

{{if not .Bundles}}
<div class="card" style="max-width:700px">
    <p style="color:var(--text-3)">Nem található .fab csomag a regisztrált tárolókon.</p>
    <p style="color:var(--text-3);font-size:.85rem">Exportálj egy alkalmazást az alkalmazás oldaláról, tölts fel egy .fab fájlt itt fent, vagy másolj egyet a <code>{tároló}/felhom-data/exports/</code> könyvtárba.</p>
</div>
{{else}}
<div class="card" style="max-width:900px">
    <table class="table" style="width:100%">
        <thead>
            <tr>
                <th>Alkalmazás</th>
                <th>Dátum</th>
                <th>Méret</th>
                <th>Tároló</th>
                <th>Titkos</th>
                <th></th>
            </tr>
        </thead>
        <tbody>
            {{range .Bundles}}
            <tr>
                <td><strong>{{if .DisplayName}}{{.DisplayName}}{{else}}{{.AppName}}{{end}}</strong></td>
                <td>{{.ExportedAt}}</td>
                <td>{{.SizeHuman}}</td>
                <td>{{if .DriveLabel}}{{.DriveLabel}}{{else}}{{.DrivePath}}{{end}}</td>
                <td>{{if .Encrypted}}&#128274;{{end}}</td>
                <td><button class="btn btn-sm btn-outline" onclick="showPreview('{{.Path}}', {{.Encrypted}})">Részletek &raquo;</button></td>
            </tr>
            {{end}}
        </tbody>
    </table>
</div>
{{end}}

<!-- Preview / password modal -->
<div id="previewCard" class="card" style="max-width:700px;display:none">
    <h3 id="previewTitle">Csomag részletei</h3>

    <div id="passwordPrompt" style="display:none;margin-bottom:1rem">
        <p>Ez a csomag jelszóval védett. Kérlek add meg a jelszót:</p>
        <div style="display:flex;gap:.5rem">
            <input type="password" id="importPassword" class="form-input" autocomplete="off" placeholder="Jelszó" style="flex:1">
            <button class="btn btn-primary" onclick="loadManifest()">Megnyitás</button>
        </div>
        <div id="passwordError" style="display:none;color:var(--crit);margin-top:.5rem"></div>
    </div>

    <div id="manifestInfo" style="display:none">
        <div style="background:var(--bg-2);border-radius:8px;padding:1rem;margin-bottom:1rem">
            <div style="display:flex;justify-content:space-between;margin-bottom:.25rem">
                <span>Alkalmazás:</span>
                <strong id="mfName">-</strong>
            </div>
            <div style="display:flex;justify-content:space-between;margin-bottom:.25rem">
                <span>Exportálva:</span>
                <span id="mfDate">-</span>
            </div>
            <div style="display:flex;justify-content:space-between;margin-bottom:.25rem">
                <span>Controller verzió:</span>
                <span id="mfVersion">-</span>
            </div>
            <div id="mfDBRow" style="display:flex;justify-content:space-between;margin-bottom:.25rem">
                <span>Adatbázis:</span>
                <span id="mfDB">-</span>
            </div>
            <div style="display:flex;justify-content:space-between;margin-bottom:.25rem">
                <span>Adatok:</span>
                <span id="mfDataType">-</span>
            </div>
            <div style="display:flex;justify-content:space-between">
                <span>Méret:</span>
                <span id="mfSize">-</span>
            </div>
        </div>

        <div id="overwriteWarning" style="display:none;background:var(--warning-bg, #fff3cd);border:1px solid var(--warning-border, #ffc107);border-radius:8px;padding:1rem;margin-bottom:1rem">
            <strong>&#9888; FIGYELEM:</strong> A meglévő <span id="overwriteAppName"></span> alkalmazás konfigurációja és összes adata felül lesz írva!
        </div>

        <button id="importBtn" class="btn btn-primary" onclick="startImport()" style="width:100%">
            Visszaállítás indítása
        </button>
    </div>
</div>

<!-- Progress -->
<div id="progressCard" class="card" style="max-width:700px;display:none">
    <h3>Importálás folyamata</h3>
    <div id="progressSteps"></div>
    <div id="progressError" style="display:none;color:var(--crit);margin-top:1rem;font-weight:600"></div>
</div>

<div id="doneCard" class="card" style="max-width:700px;display:none">
    <h3 style="color:var(--blue)">Importálás kész!</h3>
    <p>Az alkalmazás sikeresen visszaállítva.</p>
    <a id="doneLink" href="/stacks" class="btn btn-primary">Alkalmazások megtekintése</a>
</div>

<script>
var selectedPath = '';
var selectedEncrypted = false;
var selectedManifest = null;
var pollTimer = null;

function csrfH() {
    var el = document.querySelector('meta[name="csrf-token"]');
    return el ? {'X-CSRF-Token': el.content, 'Content-Type': 'application/json'} : {'Content-Type': 'application/json'};
}

function showPreview(path, encrypted) {
    selectedPath = path;
    selectedEncrypted = encrypted;
    selectedManifest = null;

    document.getElementById('previewCard').style.display = 'block';
    document.getElementById('manifestInfo').style.display = 'none';
    document.getElementById('passwordPrompt').style.display = 'none';
    document.getElementById('passwordError').style.display = 'none';
    document.getElementById('progressCard').style.display = 'none';
    document.getElementById('doneCard').style.display = 'none';

    if (encrypted) {
        document.getElementById('passwordPrompt').style.display = 'block';
        document.getElementById('importPassword').value = '';
        document.getElementById('importPassword').focus();
    } else {
        loadManifest();
    }
}

async function loadManifest() {
    var password = selectedEncrypted ? document.getElementById('importPassword').value : '';

    try {
        var resp = await fetch('/api/export/manifest', {
            method: 'POST',
            headers: csrfH(),
            body: JSON.stringify({path: selectedPath, password: password})
        });
        var data = await resp.json();

        if (!data.ok) {
            if (selectedEncrypted) {
                document.getElementById('passwordError').textContent = data.error || 'Hibás jelszó';
                document.getElementById('passwordError').style.display = 'block';
            }
            return;
        }

        if (data.needs_password) {
            document.getElementById('passwordPrompt').style.display = 'block';
            document.getElementById('importPassword').focus();
            return;
        }

        selectedManifest = data.manifest;
        showManifest(data.manifest);
    } catch(e) {
        console.error('Manifest error:', e);
    }
}

function showManifest(m) {
    document.getElementById('passwordPrompt').style.display = 'none';
    document.getElementById('manifestInfo').style.display = 'block';

    document.getElementById('previewTitle').textContent = (m.display_name || m.app_name) + ' — Csomag részletei';
    document.getElementById('mfName').textContent = m.display_name || m.app_name;
    document.getElementById('mfDate').textContent = m.exported_at ? new Date(m.exported_at).toLocaleString('hu-HU') : '-';
    document.getElementById('mfVersion').textContent = m.controller_version || '-';

    if (m.has_database && m.db_type) {
        document.getElementById('mfDB').textContent = m.db_type;
        document.getElementById('mfDBRow').style.display = 'flex';
    } else {
        document.getElementById('mfDBRow').style.display = 'none';
    }

    var dataType = [];
    if (m.has_hdd_data) dataType.push('HDD');
    if (m.has_volume_data) dataType.push('Docker volume');
    document.getElementById('mfDataType').textContent = dataType.length ? dataType.join(', ') : 'Nincs';

    // Format size
    var bytes = m.total_size_bytes || 0;
    var sizeStr = bytes > 1073741824 ? (bytes / 1073741824).toFixed(1) + ' GB' :
                  bytes > 1048576 ? (bytes / 1048576).toFixed(1) + ' MB' :
                  bytes > 1024 ? (bytes / 1024).toFixed(1) + ' KB' : bytes + ' B';
    document.getElementById('mfSize').textContent = sizeStr;

    // Check if app already exists — show overwrite warning
    // We detect this by checking if the app link exists in the nav
    var warn = document.getElementById('overwriteWarning');
    // Simple approach: always show warning for existing app names
    document.getElementById('overwriteAppName').textContent = m.display_name || m.app_name;
    warn.style.display = 'block';
}

async function startImport() {
    document.getElementById('importBtn').disabled = true;
    document.getElementById('progressCard').style.display = 'block';
    document.getElementById('doneCard').style.display = 'none';

    var password = selectedEncrypted ? document.getElementById('importPassword').value : '';

    try {
        var resp = await fetch('/api/export/import', {
            method: 'POST',
            headers: csrfH(),
            body: JSON.stringify({path: selectedPath, password: password})
        });
        var data = await resp.json();
        if (!data.ok) {
            showError(data.error || 'Hiba történt');
            return;
        }
        pollStatus();
    } catch(e) {
        showError(e.message);
    }
}

function pollStatus() {
    if (pollTimer) clearInterval(pollTimer);
    pollTimer = setInterval(async function() {
        try {
            var resp = await fetch('/api/export/import/status');
            var data = await resp.json();
            renderSteps(data.steps || []);

            if (data.error) {
                showError(data.error);
                clearInterval(pollTimer);
                return;
            }

            if (data.done && !data.error) {
                clearInterval(pollTimer);
                document.getElementById('progressCard').style.display = 'none';
                document.getElementById('doneCard').style.display = 'block';
                if (data.stack_name) {
                    document.getElementById('doneLink').href = '/stacks/' + data.stack_name + '/deploy';
                    document.getElementById('doneLink').textContent = 'Alkalmazás megtekintése';
                }
            }
        } catch(e) {
            console.error('Poll error:', e);
        }
    }, 1000);
}

function renderSteps(steps) {
    var html = '';
    for (var i = 0; i < steps.length; i++) {
        var s = steps[i];
        var icon = '&#9675;';
        if (s.status === 'running') icon = '&#10227;';
        if (s.status === 'done') icon = '&#10003;';
        if (s.status === 'failed') icon = '&#10007;';
        var cls = s.status === 'failed' ? 'color:var(--crit)' : s.status === 'done' ? 'color:var(--blue)' : s.status === 'running' ? 'color:var(--blue)' : '';
        html += '<div style="padding:.25rem 0;' + cls + '">' + icon + ' ' + s.label;
        if (s.error) html += ' <span style="font-size:.85rem">(' + s.error + ')</span>';
        html += '</div>';
    }
    document.getElementById('progressSteps').innerHTML = html;
}

function showError(msg) {
    var el = document.getElementById('progressError');
    el.textContent = msg;
    el.style.display = 'block';
    document.getElementById('importBtn').disabled = false;
}

// --- Browser .fab upload (v0.128.0): File.slice sequential chunk loop. One retry per chunk on a
// network error, re-syncing from the server's 409 received_bytes echo; progress from bytes acked.
var fabUploadId = null;
var fabCancelled = false;
var fabNetErrText = 'A feltöltés megszakadt — ellenőrizze a kapcsolatot, majd próbálja újra.';

function csrfRawH() {
    var el = document.querySelector('meta[name="csrf-token"]');
    return el ? {'X-CSRF-Token': el.content, 'Content-Type': 'application/octet-stream'} : {'Content-Type': 'application/octet-stream'};
}

function fabPick() {
    document.getElementById('fabFileInput').click();
}

function fabGB(b) {
    return (b / 1073741824).toFixed(2);
}

function fabProgress(done, total) {
    var pct = total > 0 ? Math.floor(done * 100 / total) : 0;
    document.getElementById('fabUpText').textContent =
        'Feltöltés: ' + pct + '% (' + fabGB(done) + ' / ' + fabGB(total) + ' GB)';
    document.getElementById('fabUpBar').style.width = pct + '%';
}

function fabFail(msg) {
    document.getElementById('fabUpProgress').style.display = 'none';
    document.getElementById('fabUploadZone').style.display = 'block';
    var el = document.getElementById('fabUpError');
    el.textContent = msg;
    el.style.display = 'block';
    fabUploadId = null;
}

async function fabCancel() {
    fabCancelled = true;
    if (fabUploadId) {
        try {
            await fetch('/api/export/upload/abort', {
                method: 'POST', headers: csrfH(),
                body: JSON.stringify({upload_id: fabUploadId})
            });
        } catch(e) { /* best-effort — the server's idle timeout collects the rest */ }
    }
    fabUploadId = null;
    document.getElementById('fabUpProgress').style.display = 'none';
    document.getElementById('fabUploadZone').style.display = 'block';
}

async function fabStart(file) {
    if (!file) return;
    document.getElementById('fabUpError').style.display = 'none';
    if (!file.name.toLowerCase().endsWith('.fab')) {
        fabFail('Csak .fab fájl tölthető fel.');
        return;
    }
    fabCancelled = false;
    document.getElementById('fabUploadZone').style.display = 'none';
    document.getElementById('fabUpProgress').style.display = 'block';
    fabProgress(0, file.size);

    try {
        var resp = await fetch('/api/export/upload/init', {
            method: 'POST', headers: csrfH(),
            body: JSON.stringify({filename: file.name, size_bytes: file.size})
        });
        var data = await resp.json();
        if (!data.ok) { fabFail(data.error || fabNetErrText); return; }
        fabUploadId = data.upload_id;
        var chunkBytes = data.chunk_bytes;

        var offset = 0;
        var retriedThisChunk = false;
        while (offset < file.size) {
            if (fabCancelled) return;
            var r = null;
            try {
                r = await fetch('/api/export/upload/chunk?id=' + fabUploadId + '&offset=' + offset, {
                    method: 'POST', headers: csrfRawH(),
                    body: file.slice(offset, Math.min(offset + chunkBytes, file.size))
                });
            } catch(e) {
                if (retriedThisChunk) { fabFail(fabNetErrText); return; }
                retriedThisChunk = true;
                continue; // same offset — the server only counts appended bytes
            }
            var d = await r.json().catch(function(){ return {}; });
            if (r.status === 409 && typeof d.received_bytes === 'number') {
                if (retriedThisChunk) { fabFail(d.error || fabNetErrText); return; }
                retriedThisChunk = true;
                offset = d.received_bytes; // re-sync one step from the echo
                fabProgress(offset, file.size);
                continue;
            }
            if (!r.ok || !d.ok) { fabFail(d.error || fabNetErrText); return; }
            offset = d.received_bytes;
            retriedThisChunk = false;
            fabProgress(offset, file.size);
        }
        if (fabCancelled) return;

        var fin = await fetch('/api/export/upload/finalize', {
            method: 'POST', headers: csrfH(),
            body: JSON.stringify({upload_id: fabUploadId})
        });
        var fd = await fin.json();
        if (!fd.ok) { fabFail(fd.error || fabNetErrText); return; }
        fabUploadId = null;
        document.getElementById('fabUpText').textContent = 'Feltöltés kész: ' + fd.filename;
        document.getElementById('fabUpBar').style.width = '100%';
        // Refresh the bundle list through the EXISTING scan (the page render runs it).
        setTimeout(function(){ window.location.reload(); }, 800);
    } catch(e) {
        fabFail(fabNetErrText);
    }
}

(function(){
    var input = document.getElementById('fabFileInput');
    input.addEventListener('change', function(){ fabStart(input.files[0]); input.value = ''; });
    var zone = document.getElementById('fabUploadZone');
    zone.addEventListener('dragover', function(e){ e.preventDefault(); zone.style.borderColor = 'var(--blue)'; });
    zone.addEventListener('dragleave', function(){ zone.style.borderColor = 'var(--line)'; });
    zone.addEventListener('drop', function(e){
        e.preventDefault();
        zone.style.borderColor = 'var(--line)';
        if (e.dataTransfer.files && e.dataTransfer.files.length > 0) fabStart(e.dataTransfer.files[0]);
    });
})();
</script>

{{template "layout_end" .}}
{{end}}