{% extends "base.html" %}
{% block title %}Settings Audit Log - DocuElevate{% endblock %}

{% block content %}
<div class="container mx-auto px-4 py-8" x-data="auditLogApp()">
  <!-- Header -->
  <div class="mb-8 flex justify-between items-start">
    <div>
      <h1 class="text-3xl font-bold mb-2">Settings Audit Log</h1>
      <p class="text-gray-600">
        Chronological record of all configuration changes made via the settings UI.
        Sensitive values are masked. Use the rollback button to revert any setting to a prior value.
      </p>
    </div>
    <a href="/settings"
       class="inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500">
      <i class="fas fa-cog mr-2" aria-hidden="true"></i> Back to Settings
    </a>
  </div>

  <!-- Alert Messages -->
  <div x-show="showAlert" x-transition class="mb-4">
    <div :class="alertType === 'success' ? 'bg-green-100 border-green-500 text-green-700' : 'bg-red-100 border-red-500 text-red-700'"
         class="border-l-4 p-4" role="alert">
      <p class="font-bold" x-text="alertTitle"></p>
      <p x-text="alertMessage"></p>
    </div>
  </div>

  {% if entries %}
  <div class="bg-white shadow rounded-lg overflow-hidden">
    <table class="min-w-full divide-y divide-gray-200" aria-label="Settings audit log">
      <thead class="bg-gray-50">
        <tr>
          <th scope="col" class="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">When</th>
          <th scope="col" class="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Changed By</th>
          <th scope="col" class="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Setting Key</th>
          <th scope="col" class="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Action</th>
          <th scope="col" class="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Old Value</th>
          <th scope="col" class="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">New Value</th>
          <th scope="col" class="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Rollback</th>
        </tr>
      </thead>
      <tbody class="bg-white divide-y divide-gray-200">
        {% for entry in entries %}
        <tr class="hover:bg-gray-50">
          <td class="px-4 py-3 text-sm text-gray-600 whitespace-nowrap">{{ entry.changed_at }}</td>
          <td class="px-4 py-3 text-sm text-gray-800 font-medium">{{ entry.changed_by }}</td>
          <td class="px-4 py-3 text-sm font-mono text-blue-700">{{ entry.key }}</td>
          <td class="px-4 py-3 text-sm">
            {% if entry.action == 'delete' %}
            <span class="inline-flex items-center px-2 py-0.5 rounded text-xs font-medium bg-red-100 text-red-800">delete</span>
            {% elif entry.action == 'rollback' %}
            <span class="inline-flex items-center px-2 py-0.5 rounded text-xs font-medium bg-purple-100 text-purple-800">rollback</span>
            {% else %}
            <span class="inline-flex items-center px-2 py-0.5 rounded text-xs font-medium bg-green-100 text-green-800">update</span>
            {% endif %}
          </td>
          <td class="px-4 py-3 text-sm text-gray-600 font-mono max-w-xs truncate" title="{{ entry.old_value or '' }}">
            {% if entry.old_value %}
              <span class="text-gray-500">{{ entry.old_value }}</span>
            {% else %}
              <span class="italic text-gray-400">—</span>
            {% endif %}
          </td>
          <td class="px-4 py-3 text-sm text-gray-800 font-mono max-w-xs truncate" title="{{ entry.new_value or '' }}">
            {% if entry.new_value %}
              {{ entry.new_value }}
            {% else %}
              <span class="italic text-gray-400">— (deleted)</span>
            {% endif %}
          </td>
          <td class="px-4 py-3 text-sm">
            <button
              type="button"
              @click="rollback('{{ entry.key }}', {{ entry.id }}, '{{ entry.old_value or '' }}')"
              :disabled="rollingBack === {{ entry.id }}"
              class="inline-flex items-center px-2 py-1 text-xs font-medium rounded border border-gray-300 text-gray-700 bg-white hover:bg-yellow-50 hover:border-yellow-400 focus:outline-none focus:ring-2 focus:ring-offset-1 focus:ring-yellow-400 disabled:opacity-50 disabled:cursor-not-allowed"
              title="Revert '{{ entry.key }}' to the value in this log entry"
            >
              <span x-show="rollingBack !== {{ entry.id }}"><i class="fas fa-undo mr-1" aria-hidden="true"></i>Rollback</span>
              <span x-show="rollingBack === {{ entry.id }}">Working…</span>
            </button>
          </td>
        </tr>
        {% endfor %}
      </tbody>
    </table>
  </div>
  {% else %}
  <div class="bg-white shadow rounded-lg p-8 text-center text-gray-500">
    <i class="fas fa-history text-4xl mb-4 block text-gray-300" aria-hidden="true"></i>
    <p class="text-lg">No configuration changes recorded yet.</p>
    <p class="text-sm mt-2">Changes you make on the <a href="/settings" class="text-blue-600 hover:underline">Settings page</a> will appear here.</p>
  </div>
  {% endif %}
</div>

<script>
function auditLogApp() {
  return {
    rollingBack: null,
    showAlert: false,
    alertType: 'success',
    alertTitle: '',
    alertMessage: '',

    showSuccessAlert(title, message) {
      this.alertType = 'success';
      this.alertTitle = title;
      this.alertMessage = message;
      this.showAlert = true;
      setTimeout(() => this.showAlert = false, 6000);
    },

    showErrorAlert(title, message) {
      this.alertType = 'error';
      this.alertTitle = title;
      this.alertMessage = message;
      this.showAlert = true;
      setTimeout(() => this.showAlert = false, 10000);
    },

    async rollback(key, historyId, targetValue) {
      const label = targetValue ? `'${targetValue}'` : '(deleted / ENV default)';
      if (!confirm(`Revert '${key}' to ${label}?\n\nThis will write a new audit log entry.`)) {
        return;
      }

      this.rollingBack = historyId;
      this.showAlert = false;

      try {
        const response = await fetch(`/api/settings/${key}/rollback/${historyId}`, {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
        });

        const result = await response.json();

        if (response.ok && result.success) {
          this.showSuccessAlert('Rollback Successful', `Setting '${key}' has been reverted. Reloading…`);
          setTimeout(() => window.location.reload(), 1500);
        } else {
          this.showErrorAlert('Rollback Failed', result.detail || 'Unknown error');
        }
      } catch (error) {
        console.error('Rollback error:', error);
        this.showErrorAlert('Error', 'Failed to perform rollback. Please try again.');
      } finally {
        this.rollingBack = null;
      }
    }
  };
}
</script>
{% endblock %}