{% extends "base.html" %}
{% from "_macros.html" import crumbs %}
{% block title %}{% if rule %}Edit Rule{% else %}New Alert Rule{% endif %} — Steward{% endblock %}
{% block breadcrumb %}{{ crumbs([("Alerts", "/alerts/"), ("Edit rule" if rule else "New rule", "")]) }}{% endblock %}
{% block content %}
<div style="max-width:600px;margin:2rem auto;">
  <h1 class="page-title">{% if rule %}Edit Rule{% else %}New Alert Rule{% endif %}</h1>
  <div class="card">
    <form method="post" action="{% if rule %}/alerts/rules/{{ rule.id }}{% else %}/alerts/rules{% endif %}">{{ csrf_field() }}

      <div class="form-group">
        <label>Rule Name</label>
        <input type="text" name="name" required autofocus
               value="{{ rule.name if rule else '' }}"
               placeholder="e.g. Home server down">
      </div>

      {# ── Source module ───────────────────────────────────────────────────── #}
      <div class="form-group">
        <label>Source</label>
        <select name="source_module" required
                hx-get="/alerts/api/rule_fields"
                hx-trigger="change"
                hx-target="#rule-fields"
                hx-include="[name='source_module']">
          {% for src in source_modules %}
          <option value="{{ src }}" {% if src == initial_source %}selected{% endif %}>
            {{ src }}
          </option>
          {% endfor %}
        </select>
      </div>

      {# ── Dynamic resource + metric ────────────────────────────────────────── #}
      <div id="rule-fields">
        {# Inline the same partial logic so the page is fully usable without JS #}
        <div class="form-group">
          <label>Resource Name</label>
          {% if resources %}
          <select name="resource_name" required>
            {% if not (rule and rule.resource_name) %}<option value="" disabled selected>— pick a resource —</option>{% endif %}
            {% for r in resources %}
            <option value="{{ r }}" {% if rule and r == rule.resource_name %}selected{% endif %}>{{ r }}</option>
            {% endfor %}
          </select>
          {% else %}
          <select name="resource_name" required disabled>
            <option value="">No data yet — run monitors first</option>
          </select>
          <p class="field-hint">
            Resource names populate from live metric data. Start the scheduler and try again.
          </p>
          {% endif %}
        </div>

        <div class="form-group">
          <label>Metric Name</label>
          <select name="metric_name" required>
            {% if not (rule and rule.metric_name) %}<option value="" disabled selected>— pick a metric —</option>{% endif %}
            {% for m in metrics %}
            <option value="{{ m }}" {% if rule and m == rule.metric_name %}selected{% endif %}>{{ m }}</option>
            {% endfor %}
          </select>
        </div>
      </div>

      {# ── Condition ───────────────────────────────────────────────────────── #}
      <div style="display:grid;grid-template-columns:1fr 1fr;gap:1rem;">
        <div class="form-group">
          <label>Operator</label>
          <select name="operator">
            {% for val, label in operators %}
            <option value="{{ val }}" {% if rule and rule.operator.value == val %}selected{% endif %}>
              {{ label }}
            </option>
            {% endfor %}
          </select>
        </div>
        <div class="form-group">
          <label>Threshold</label>
          <input type="number" name="threshold" step="any" required
                 value="{{ rule.threshold if rule else '' }}"
                 placeholder="0.5">
        </div>
      </div>

      <div class="form-group">
        <label>Consecutive failures before FIRING</label>
        <input type="number" name="consecutive_failures_required" min="1"
               value="{{ rule.consecutive_failures_required if rule else 1 }}">
      </div>

      <div class="form-group">
        <label>Consecutive OK checks before it clears</label>
        <input type="number" name="consecutive_ok_required" min="1"
               value="{{ rule.consecutive_ok_required if rule else 1 }}">
        <p class="field-hint">
          A firing or acknowledged alert resolves only after this many checks in a row are back
          within the threshold. An acknowledgement holds until then.</p>
      </div>

      <div class="form-group">
        <label style="display:flex;align-items:center;gap:0.5rem;font-weight:normal;">
          <input type="checkbox" name="notify_no_data"
                 {% if not rule or rule.notify_no_data %}checked{% endif %}>
          Notify when this metric stops reporting
        </label>
        <p class="field-hint">
          Silence is always shown as NO DATA on the Alerts page: no sample for three of the
          metric's usual gaps (at least 5 minutes). This also sends a notification when it starts
          and when data resumes. A firing alert that goes silent stays firing.</p>
      </div>

      {# ── Metric reference ────────────────────────────────────────────────── #}
      <details style="margin-bottom:1rem;">
        <summary style="cursor:pointer;font-size:0.82rem;color:var(--text-muted);user-select:none;">
          Metric reference
        </summary>
        <div style="margin-top:0.75rem;display:grid;gap:0.5rem;">
          {% set descs = {
            "icmp":    [("is_up", "1.0 = reachable, 0.0 = unreachable"),
                        ("response_ms", "round-trip latency in milliseconds")],
            "tcp":     [("is_up", "1.0 = port open, 0.0 = unreachable"),
                        ("response_ms", "TCP connect time in milliseconds")],
            "dns":     [("is_up", "1.0 = resolved (and matches expected IP), 0.0 = failed"),
                        ("response_ms", "resolution time in milliseconds")],
            "traefik": [("request_rate", "requests/sec for this router"),
                        ("error_rate_4xx_pct", "% of responses that are 4xx"),
                        ("error_rate_5xx_pct", "% of responses that are 5xx"),
                        ("latency_p50_ms", "median response time ms"),
                        ("latency_p95_ms", "p95 response time ms"),
                        ("latency_p99_ms", "p99 response time ms"),
                        ("response_bytes_rate", "bytes/sec of responses"),
                        ("cert_expiry_days", "days until TLS cert expires")],
            "unifi":   [("is_up", "1.0 = WAN up, 0.0 = down"),
                        ("latency_ms", "WAN latency in ms"),
                        ("total_clients", "number of connected clients")],
            "docker":  [("cpu_pct", "container CPU usage %"),
                        ("mem_pct", "container memory usage %")],
            "http":    [("is_up", "1.0 = check passed, 0.0 = failed"),
                        ("response_ms", "HTTP response time in ms")],
            "host_agent": [("seconds_since_seen", "seconds since the agent last reported; > 180 = offline"),
                           ("cpu_pct", "host CPU usage %"),
                           ("mem_used_pct", "host memory usage %"),
                           ("disk_used_pct_worst", "fullest disk, % used"),
                           ("disk_used_pct", "one mount, % used (resource host:mount)")],
          } %}
          {% for src, pairs in descs.items() %}
          <div>
            <div style="font-size:0.78rem;font-weight:500;color:var(--text-dim);text-transform:uppercase;letter-spacing:0.05em;margin-bottom:0.2rem;">{{ src }}</div>
            {% for metric, desc in pairs %}
            <div style="display:grid;grid-template-columns:160px 1fr;gap:0.5rem;font-size:0.78rem;padding:0.15rem 0;">
              <code>{{ metric }}</code>
              <span style="color:var(--text-muted);">{{ desc }}</span>
            </div>
            {% endfor %}
          </div>
          {% endfor %}
        </div>
      </details>

      {# ── Ansible action (admin only) ─────────────────────────────────────── #}
      {% if session.get("user_role") == "admin" %}
      {% set act = rule.ansible_action if rule and rule.ansible_action else None %}
      <div style="margin:1.25rem 0;padding:1rem;border:1px solid var(--border-mid);border-radius:6px;background:var(--bg-elevated);">
        <label style="display:flex;align-items:center;gap:0.5rem;font-weight:500;">
          <input type="checkbox" name="ansible_enabled" {% if act %}checked{% endif %}>
          On firing → run an Ansible playbook
        </label>
        <p style="font-size:0.78rem;color:var(--text-muted);margin:0.4rem 0 0.75rem;">
          Admin only. Runs once when the alert transitions into FIRING.
          <code>steward_alert_*</code> context vars (resource, metric, value…) are injected automatically.
        </p>
        <div class="form-group">
          <label>Source</label>
          <select name="ansible_source">
            <option value="">— select source —</option>
            {% for s in ansible_sources %}
            <option value="{{ s }}" {% if act and act.source == s %}selected{% endif %}>{{ s }}</option>
            {% endfor %}
          </select>
        </div>
        <div class="form-group">
          <label>Playbook <span style="color:var(--text-muted);font-weight:normal;">(path within source)</span></label>
          <input type="text" name="ansible_playbook" placeholder="playbooks/shutdown.yml"
                 value="{{ act.playbook if act else '' }}">
        </div>
        <div class="form-group">
          <label>Inventory <span style="color:var(--text-muted);font-weight:normal;">(path within source)</span></label>
          <input type="text" name="ansible_inventory" placeholder="inventory/hosts"
                 value="{{ act.inventory if act else '' }}">
        </div>
        <div class="form-group">
          <label>Extra vars <span style="color:var(--text-muted);font-weight:normal;">(optional, one key=value per line)</span></label>
          <textarea name="ansible_extra_vars" rows="2"
                    style="width:100%;font-family:ui-monospace,monospace;font-size:0.85rem;">{{ act.extra_vars | join("\n") if act and act.extra_vars else "" }}</textarea>
        </div>
        <div class="form-group">
          <label>Limit to host(s) <span style="color:var(--text-muted);font-weight:normal;">(optional)</span></label>
          <input type="text" name="ansible_limit" value="{{ act.limit if act and act.limit else '' }}">
        </div>
        <div class="form-group">
          <label>Tags <span style="color:var(--text-muted);font-weight:normal;">(optional)</span></label>
          <input type="text" name="ansible_tags" value="{{ act.tags if act and act.tags else '' }}">
        </div>
        <label style="display:flex;align-items:center;gap:0.5rem;font-weight:normal;">
          <input type="checkbox" name="ansible_check" {% if act and act.check %}checked{% endif %}>
          Dry-run (--check --diff)
        </label>
      </div>
      {% endif %}

      {% if not rule %}
      <script>
        // "Agent offline" is seconds_since_seen > 180 (the agent's stale window).
        document.addEventListener("change", function (e) {
          if (e.target.name !== "metric_name" || e.target.value !== "seconds_since_seen") return;
          var form = e.target.form, threshold = form.elements["threshold"];
          if (threshold.value === "") {
            form.elements["operator"].value = ">";
            threshold.value = "180";
          }
        });
      </script>
      {% endif %}

      <div style="display:flex;gap:1rem;margin-top:1.5rem;">
        <button type="submit" class="btn">{% if rule %}Save Changes{% else %}Create Rule{% endif %}</button>
        <a href="/alerts/" class="btn btn-ghost">Cancel</a>
      </div>
    </form>
  </div>
</div>
{% endblock %}