{% extends "base.html" %}
{% block title %} — Restore{% endblock %}

{% block content %}
<div class="page-header">
  <h4><i class="bi bi-arrow-counterclockwise me-2 text-warning"></i>Restore</h4>
</div>

<!-- Available backups in S3 -->
<div class="card stat-card mb-4">
  <div class="card-header bg-white border-0 pt-3 pb-2">
    <span class="fw-bold"><i class="bi bi-cloud-download me-2 text-primary"></i>Available Backups</span>
    <span class="text-muted small ms-2">— click Restore to decrypt and extract locally</span>
  </div>
  <div class="table-responsive">
    <table class="table table-hover mb-0">
      <thead class="table-light">
        <tr>
          <th>Archive</th>
          <th>Last Modified</th>
          <th>Size</th>
          <th></th>
        </tr>
      </thead>
      <tbody>
        {% for b in remote_backups %}
        <tr>
          <td>
            {% if b.get('backup_type') == 'incremental' %}
              <span class="badge bg-success me-1"><i class="bi bi-arrow-repeat me-1"></i>Incr</span>
            {% else %}
              <span class="badge bg-primary me-1"><i class="bi bi-database-fill-up me-1"></i>Full</span>
            {% endif %}
            <span class="font-monospace small">{{ b['name'] }}</span>
          </td>
          <td>{{ b['last_modified'][:16].replace('T',' ') }}</td>
          <td>{{ b['size_mb'] }} MB</td>
          <td class="text-end">
            <button class="btn btn-warning btn-sm"
                    onclick="startRestore(this)"
                    data-s3key="{{ b['key'] }}"
                    data-type="{{ b.get('backup_type', 'full') }}"
                    data-chain="{{ 'true' if b.get('chain_available') else 'false' }}"
                    data-chain-length="{{ b.get('chain_length', 1) }}">
              <i class="bi bi-arrow-counterclockwise me-1"></i>Restore
            </button>
          </td>
        </tr>
        {% else %}
        <tr>
          <td colspan="4" class="text-center text-muted py-4">
            <i class="bi bi-cloud-slash fs-3 d-block mb-2"></i>
            No backups found — check your S3 settings or run a backup first.
          </td>
        </tr>
        {% endfor %}
      </tbody>
    </table>
  </div>
</div>

<!-- Past restores -->
<div class="card stat-card">
  <div class="card-header bg-white border-0 pt-3 pb-2">
    <span class="fw-bold"><i class="bi bi-folder2-open me-2 text-secondary"></i>Previous Restores</span>
    <span class="text-muted small ms-2">— extracted files ready to browse and download</span>
  </div>
  <div class="table-responsive">
    <table class="table table-hover mb-0">
      <thead class="table-light">
        <tr>
          <th>#</th>
          <th>Started</th>
          <th>Duration</th>
          <th>Archive</th>
          <th>Files</th>
          <th>Status</th>
          <th></th>
        </tr>
      </thead>
      <tbody>
        {% for r in restores %}
        <tr>
          <td class="text-muted">{{ r['id'] }}</td>
          <td>{{ r['started_at'] | fmtdt }}</td>
          <td>{{ r['started_at'] | duration(r['completed_at']) }}</td>
          <td class="font-monospace small" style="max-width:260px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap">
            {{ r['s3_key'].split('/')[-1] }}
          </td>
          <td>{{ r['file_count'] or '—' }}</td>
          <td>
            {% if r['status'] == 'success' %}
              <span class="badge badge-success"><i class="bi bi-check me-1"></i>Ready</span>
            {% elif r['status'] == 'failed' %}
              <span class="badge badge-failed" title="{{ r['error_message'] or '' }}">
                <i class="bi bi-x me-1"></i>Failed
              </span>
            {% else %}
              <span class="badge badge-running"><i class="bi bi-arrow-repeat me-1"></i>Running</span>
            {% endif %}
          </td>
          <td class="text-end d-flex gap-1 justify-content-end">
            {% if r['status'] == 'success' %}
              <a href="{{ url_for('restore_view', restore_id=r['id']) }}" class="btn btn-outline-primary btn-sm">
                <i class="bi bi-folder2-open me-1"></i>Browse
              </a>
              <a href="{{ url_for('restore_download_zip', restore_id=r['id']) }}" class="btn btn-outline-secondary btn-sm">
                <i class="bi bi-file-zip me-1"></i>ZIP
              </a>
            {% elif r['status'] == 'running' %}
              <a href="{{ url_for('restore_view', restore_id=r['id']) }}" class="btn btn-outline-warning btn-sm">
                <i class="bi bi-eye me-1"></i>View
              </a>
            {% endif %}
            <button class="btn btn-outline-danger btn-sm" onclick="deleteRestore({{ r['id'] }}, this)"
                    {% if r['status'] == 'running' %}disabled{% endif %}>
              <i class="bi bi-trash"></i>
            </button>
          </td>
        </tr>
        {% else %}
        <tr>
          <td colspan="7" class="text-center text-muted py-4">No restores yet</td>
        </tr>
        {% endfor %}
      </tbody>
    </table>
  </div>
</div>

<!-- Restore options modal -->
<div class="modal fade" id="restoreFilterModal" tabindex="-1">
  <div class="modal-dialog modal-dialog-centered">
    <div class="modal-content border-0 shadow-lg">
      <div class="modal-header border-0 pb-0">
        <h5 class="modal-title fw-bold">
          <i class="bi bi-arrow-counterclockwise me-2 text-warning"></i>Restore Options
        </h5>
        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
      </div>
      <div class="modal-body">

        <!-- Archive type info -->
        <div class="d-flex align-items-center gap-2 mb-3 p-2 rounded bg-light">
          <span id="restoreTypeBadge" class="badge bg-primary">Full</span>
          <span id="restoreArchiveName" class="font-monospace small text-muted text-truncate"></span>
        </div>

        <!-- Chain restore toggle (incrementals only) -->
        <div id="restoreChainSection" class="mb-3 d-none">
          <div class="form-check form-switch mb-1">
            <input class="form-check-input" type="checkbox" id="restoreChainToggle" checked
                   onchange="toggleChainWarning(this.checked)">
            <label class="form-check-label fw-semibold" for="restoreChainToggle">
              Chain Restore <span id="restoreChainLabel" class="text-muted fw-normal small"></span>
            </label>
          </div>
          <div class="form-text mb-2">
            Downloads the parent full backup + all incrementals up to this point,
            merged into a complete database snapshot.
          </div>
          <div id="restorePartialWarning" class="alert alert-warning border-0 py-2 small d-none">
            <i class="bi bi-exclamation-triangle-fill me-1"></i>
            <strong>Partial restore</strong> — only entities changed in this specific incremental will be
            extracted. Enable Chain Restore above for a complete snapshot.
          </div>
        </div>

        <!-- Entity filter -->
        <label class="form-label fw-semibold small">
          Entity filter <span class="fw-normal text-muted">(optional)</span>
        </label>
        <input type="text" class="form-control font-monospace" id="restoreEntityFilter"
               placeholder="customers, vendors, salesInvoices … (blank = all)">
        <div class="form-text">Comma-separated entity names to extract.</div>
      </div>
      <div class="modal-footer border-0 pt-0">
        <button class="btn btn-secondary btn-sm" data-bs-dismiss="modal">Cancel</button>
        <button class="btn btn-warning btn-sm" onclick="confirmRestore()">
          <i class="bi bi-arrow-counterclockwise me-1"></i>Start Restore
        </button>
      </div>
    </div>
  </div>
</div>

<!-- Restore progress modal -->
<div class="modal fade" id="restoreModal" tabindex="-1" data-bs-backdrop="static">
  <div class="modal-dialog modal-lg modal-dialog-centered">
    <div class="modal-content border-0 shadow-lg">
      <div class="modal-header border-0 pb-0">
        <h5 class="modal-title fw-bold">
          <i class="bi bi-arrow-counterclockwise me-2 text-warning"></i>
          <span id="restoreModalTitle">Restore in Progress…</span>
        </h5>
      </div>
      <div class="modal-body">
        <div class="d-flex align-items-center gap-2 mb-3">
          <div class="spinner-border spinner-border-sm text-warning" id="restoreSpinner"></div>
          <span id="restoreStatusText" class="text-muted small">Downloading from S3…</span>
        </div>
        <div class="log-terminal" id="restoreLog"></div>
      </div>
      <div class="modal-footer border-0 pt-0">
        <button type="button" class="btn btn-secondary btn-sm" id="restoreCloseBtn"
                data-bs-dismiss="modal" disabled>Close</button>
        <a href="#" class="btn btn-warning btn-sm d-none" id="restoreBrowseBtn">
          <i class="bi bi-folder2-open me-1"></i>Browse Files
        </a>
      </div>
    </div>
  </div>
</div>
{% endblock %}

{% block scripts %}
<script>
let _restoreModal = null;
let _filterModal  = null;
let _pendingRestore = {};

function startRestore(btn) {
  const s3key       = btn.dataset.s3key;
  const btype       = btn.dataset.type || 'full';
  const chainAvail  = btn.dataset.chain === 'true';
  const chainLength = parseInt(btn.dataset.chainLength || '1');

  _pendingRestore = {s3key, btype, chainAvail, chainLength};

  document.getElementById('restoreEntityFilter').value = '';
  document.getElementById('restoreArchiveName').textContent = s3key.split('/').pop();

  const badge = document.getElementById('restoreTypeBadge');
  if (btype === 'incremental') {
    badge.textContent = 'Incremental';
    badge.className   = 'badge bg-success';
  } else {
    badge.textContent = 'Full Backup';
    badge.className   = 'badge bg-primary';
  }

  const chainSection = document.getElementById('restoreChainSection');
  if (btype === 'incremental' && chainAvail) {
    chainSection.classList.remove('d-none');
    const toggle = document.getElementById('restoreChainToggle');
    toggle.checked  = true;
    toggle.disabled = false;
    document.getElementById('restoreChainLabel').textContent =
      `— ${chainLength} archive${chainLength > 1 ? 's' : ''} (1 full + ${chainLength - 1} incr)`;
    document.getElementById('restorePartialWarning').classList.add('d-none');
  } else if (btype === 'incremental' && !chainAvail) {
    chainSection.classList.remove('d-none');
    const toggle    = document.getElementById('restoreChainToggle');
    toggle.checked  = false;
    toggle.disabled = true;
    document.getElementById('restoreChainLabel').textContent = '— not available (run a full backup first)';
    document.getElementById('restorePartialWarning').classList.remove('d-none');
  } else {
    chainSection.classList.add('d-none');
  }

  if (!_filterModal) _filterModal = new bootstrap.Modal(document.getElementById('restoreFilterModal'));
  _filterModal.show();
}

function toggleChainWarning(on) {
  document.getElementById('restorePartialWarning').classList.toggle('d-none', on);
}

function confirmRestore() {
  const entityFilter = document.getElementById('restoreEntityFilter').value.trim();
  const useChain     = document.getElementById('restoreChainToggle')?.checked ?? false;
  if (_filterModal) _filterModal.hide();
  _doRestore(_pendingRestore.s3key, entityFilter, useChain);
}

function _doRestore(s3Key, entityFilter, useChain) {
  const terminal   = document.getElementById('restoreLog');
  const statusText = document.getElementById('restoreStatusText');
  const spinner    = document.getElementById('restoreSpinner');
  const closeBtn   = document.getElementById('restoreCloseBtn');
  const browseBtn  = document.getElementById('restoreBrowseBtn');
  const title      = document.getElementById('restoreModalTitle');

  terminal.innerHTML = '';
  spinner.className  = 'spinner-border spinner-border-sm text-warning';
  statusText.textContent = 'Downloading from S3…';
  statusText.className   = 'text-muted small';
  closeBtn.disabled = true;
  browseBtn.classList.add('d-none');
  title.textContent = 'Restore in Progress…';

  if (!_restoreModal) _restoreModal = new bootstrap.Modal(document.getElementById('restoreModal'));
  _restoreModal.show();

  fetch('/api/restore', {
    method: 'POST',
    headers: {'Content-Type': 'application/json'},
    body: JSON.stringify({s3_key: s3Key, entities: entityFilter || '', chain: !!useChain}),
  })
  .then(r => r.json())
  .then(data => {
    if (data.error) {
      statusText.textContent = 'Error: ' + data.error;
      statusText.className   = 'text-danger small fw-semibold';
      spinner.className = 'd-none';
      closeBtn.disabled = false;
      return;
    }
    const restoreId = data.restore_id;
    statusText.textContent = 'Restore #' + restoreId + ' running…';

    const evtSrc = new EventSource('/api/restore/' + restoreId + '/stream');
    evtSrc.onmessage = function(e) {
      const msg = JSON.parse(e.data);
      if (msg.keepalive) return;
      if (msg.done) {
        evtSrc.close();
        spinner.className = 'd-none';
        closeBtn.disabled = false;
        if (msg.status === 'success') {
          title.textContent = 'Restore Complete';
          statusText.innerHTML = '<i class="bi bi-check-circle-fill text-success me-1"></i><span class="text-success fw-semibold">Files extracted and ready to browse.</span>';
          browseBtn.href = '/restore/' + restoreId;
          browseBtn.classList.remove('d-none');
        } else {
          title.textContent = 'Restore Failed';
          statusText.innerHTML = '<i class="bi bi-x-circle-fill text-danger me-1"></i><span class="text-danger fw-semibold">Restore failed — see log above.</span>';
        }
        return;
      }
      if (msg.log) appendLog(document.getElementById('restoreLog'), msg.log);
    };
  });
}

window.addEventListener('load', function() {
  const key = sessionStorage.getItem('restoreKey');
  if (key) {
    sessionStorage.removeItem('restoreKey');
    _doRestore(key, '', false);
  }
});

function deleteRestore(id, btn) {
  if (!confirm('Delete this restore and all extracted files?')) return;
  btn.disabled = true;
  fetch('/api/restore/' + id, {method: 'DELETE'})
    .then(r => r.json())
    .then(data => {
      if (data.ok) btn.closest('tr').remove();
      else { btn.disabled = false; alert('Delete failed: ' + (data.error || 'unknown error')); }
    });
}
</script>
{% endblock %}