{% if backends %}
<div class="space-y-2">
    {% for name, backend in backends.items() %}
    <div
        class="flex flex-col sm:flex-row sm:items-center sm:justify-between p-2 rounded gap-2 {% if not backend.enabled %}bg-gray-100{% elif backend.status.connected %}bg-green-50{% else %}bg-red-50{% endif %}">
        <!-- Top row: name + toggle -->
        <div class="flex items-center justify-between sm:justify-start gap-2">
            <div class="flex items-center gap-2">
                <span
                    class="w-2.5 h-2.5 rounded-full flex-shrink-0 {% if not backend.enabled %}bg-gray-400{% elif backend.status.connected %}bg-green-500{% else %}bg-red-500{% endif %}"></span>
                <span class="font-medium text-gray-800 {% if not backend.enabled %}opacity-50{% endif %}">{{ name }}</span>
                <span class="text-xs text-gray-500 {% if not backend.enabled %}opacity-50{% endif %}">({{ backend.backend_type }})</span>
            </div>
            <!-- Toggle visible on mobile next to name -->
            <div class="flex items-center gap-2 sm:hidden">
                <a href="/backends/{{ name }}/log"
                    class="text-xs px-1.5 py-0.5 bg-gray-100 hover:bg-gray-200 rounded text-gray-500"
                    title="SSH command log">Log</a>
                <button onclick="fetch('/backends/{{ name }}/toggle',{method:'POST'}).then(function(){location.reload()})"
                    class="relative inline-flex h-5 w-9 flex-shrink-0 cursor-pointer rounded-full border-2 border-transparent transition-colors duration-200 ease-in-out focus:outline-none {% if backend.enabled %}bg-green-500{% else %}bg-gray-300{% endif %}"
                    title="{% if backend.enabled %}Disable{% else %}Enable{% endif %} {{ name }}">
                    <span class="pointer-events-none inline-block h-4 w-4 transform rounded-full bg-white shadow ring-0 transition duration-200 ease-in-out {% if backend.enabled %}translate-x-4{% else %}translate-x-0{% endif %}"></span>
                </button>
            </div>
        </div>
        <!-- Bottom row: status details -->
        <div class="flex items-center gap-2 sm:text-right flex-wrap">
            {% if not backend.enabled %}
            <span class="text-xs text-gray-400">Disabled</span>
            {% elif backend.status.connected %}
            {% if backend.status.cpus_user is not none and backend.status.cpus_idle is not none %}
            <span class="text-xs text-gray-600">Using <span class="font-medium text-blue-600">{{ backend.status.cpus_user }}</span> CPUs in {{ backend_job_counts.get(name, 0) }} jobs, <span class="font-medium">{{ backend.status.cpus_idle }}</span> available</span>
            {% else %}
            <span class="text-xs text-gray-500">{{ backend_job_counts.get(name, 0) }} jobs</span>
            {% endif %}
            {% if backend.status.disk_avail_bytes is not none and backend.status.disk_total_bytes %}
            {% set disk_used_pct = ((backend.status.disk_total_bytes - backend.status.disk_avail_bytes) * 100 / backend.status.disk_total_bytes) | round(0, 'floor') | int %}
            <span class="text-xs {% if disk_used_pct >= 90 %}text-red-600{% elif disk_used_pct >= 75 %}text-yellow-600{% else %}text-gray-600{% endif %}"
                title="Disk usage at {{ backend.status.disk_clone_dir }}">
                <span class="font-medium">{{ backend.status.disk_avail_bytes | disk_bytes }}</span> free ({{ disk_used_pct }}% used)
            </span>
            {% endif %}
            {% if backend.status.last_poll_duration_ms is not none %}
            <span
                class="text-xs font-mono {% if backend.status.last_poll_duration_ms > 5000 %}text-red-500{% elif backend.status.last_poll_duration_ms > 2000 %}text-yellow-600{% else %}text-gray-400{% endif %}"
                title="Poll duration">{{ backend.status.last_poll_duration_ms }}ms</span>
            {% endif %}
            {% if backend.status.last_poll %}
            <time class="text-xs text-gray-400 local-time" datetime="{{ backend.status.last_poll.isoformat() }}" data-format="time"></time>
            {% endif %}
            {% else %}
            <span class="text-sm text-red-700">Disconnected</span>
            {% if backend.status.last_poll_duration_ms is not none %}
            <span class="text-xs font-mono text-gray-400">{{ backend.status.last_poll_duration_ms
                }}ms</span>
            {% endif %}
            {% endif %}
            <!-- Log + Toggle visible on desktop -->
            <a href="/backends/{{ name }}/log"
                class="hidden sm:inline-block text-xs px-1.5 py-0.5 bg-gray-100 hover:bg-gray-200 rounded text-gray-500"
                title="SSH command log">Log</a>
            <button onclick="fetch('/backends/{{ name }}/toggle',{method:'POST'}).then(function(){location.reload()})"
                class="hidden sm:inline-flex relative h-5 w-9 flex-shrink-0 cursor-pointer rounded-full border-2 border-transparent transition-colors duration-200 ease-in-out focus:outline-none {% if backend.enabled %}bg-green-500{% else %}bg-gray-300{% endif %}"
                title="{% if backend.enabled %}Disable{% else %}Enable{% endif %} {{ name }}">
                <span class="pointer-events-none inline-block h-4 w-4 transform rounded-full bg-white shadow ring-0 transition duration-200 ease-in-out {% if backend.enabled %}translate-x-4{% else %}translate-x-0{% endif %}"></span>
            </button>
        </div>
    </div>
    {% if backend.enabled and backend.status.error %}
    <div class="ml-4 p-2 bg-red-100 rounded text-sm text-red-700 font-mono text-xs">
        {{ backend.status.error }}
    </div>
    {% endif %}
    {% if backend.enabled and backend.status.connected and backend.status.cluster_info and backend.status.cluster_info.user_quota %}
    {% set q = backend.status.cluster_info.user_quota %}
    <div class="ml-4 mt-1 text-xs text-gray-600 flex flex-wrap gap-x-3 gap-y-0.5">
        <span class="text-gray-400">Your usage:</span>
        {% if q.jobs_used is not none or q.jobs_max is not none %}
        <span class="font-mono"
            {% if q.jobs_max and q.jobs_used and q.jobs_used >= q.jobs_max %}class="text-red-600"{% endif %}>
            jobs <span class="font-medium">{{ q.jobs_used if q.jobs_used is not none else '?' }}</span>{% if q.jobs_max %}<span class="text-gray-400">/{{ q.jobs_max }}</span>{% endif %}
        </span>
        {% endif %}
        {% if q.cpus_used is not none or q.cpus_max is not none %}
        <span class="font-mono {% if q.cpus_max and q.cpus_used and q.cpus_used >= q.cpus_max %}text-red-600{% elif q.cpus_max and q.cpus_used and q.cpus_used * 4 >= q.cpus_max * 3 %}text-yellow-700{% endif %}">
            cpus <span class="font-medium">{{ q.cpus_used if q.cpus_used is not none else '?' }}</span>{% if q.cpus_max %}<span class="text-gray-400">/{{ q.cpus_max }}</span>{% endif %}
        </span>
        {% endif %}
        {% if q.gpus_used is not none and q.gpus_used > 0 or q.gpus_max is not none %}
        <span class="font-mono {% if q.gpus_max and q.gpus_used and q.gpus_used >= q.gpus_max %}text-red-600{% elif q.gpus_max and q.gpus_used and q.gpus_used * 4 >= q.gpus_max * 3 %}text-yellow-700{% endif %}">
            gpus <span class="font-medium">{{ q.gpus_used if q.gpus_used is not none else '?' }}</span>{% if q.gpus_max %}<span class="text-gray-400">/{{ q.gpus_max }}</span>{% endif %}
        </span>
        {% endif %}
        {% if q.fair_share is not none %}
        <span class="font-mono" title="Slurm fair-share priority weight (0.0-1.0, higher = better)">
            fair-share <span class="font-medium {% if q.fair_share < 0.3 %}text-red-600{% elif q.fair_share < 0.5 %}text-yellow-700{% else %}text-green-700{% endif %}">{{ '%.2f'|format(q.fair_share) }}</span>
        </span>
        {% endif %}
        {% if q.account %}
        <span class="text-gray-400">account <span class="font-mono text-gray-600">{{ q.account }}</span></span>
        {% endif %}
    </div>
    {% endif %}
    {% if backend.enabled and backend.status.connected and backend.status.cluster_info %}
    {% set ci = backend.status.cluster_info %}
    {% set has_gpus = ci.partitions|selectattr('gpus_total', 'gt', 0)|list|length > 0 %}
    {% if ci.partitions|length > 1 or ci.pending_reasons or has_gpus %}
    <details class="ml-4 mt-1">
        <summary class="text-xs text-gray-500 cursor-pointer hover:text-gray-700 select-none">
            Partition details
            {% if ci.pending_reasons %}
            <span class="ml-1 text-yellow-700">• {{ ci.pending_reasons.values()|sum }} pending</span>
            {% endif %}
        </summary>
        {% set cpu_avail = ci.partitions | selectattr('cpus_free_max_node', 'gt', 0) | sort(attribute='cpus_free_max_node', reverse=true) | list %}
        {% set gpu_avail = ci.partitions | selectattr('gpus_schedulable', 'gt', 0) | sort(attribute='gpus_schedulable', reverse=true) | list %}
        <div class="mt-1 text-xs">
            {% if cpu_avail %}
            <span class="text-gray-400">Easiest to start now:</span>
            <span class="font-mono font-medium text-green-700">{{ cpu_avail[0].name }}</span>
            <span class="text-gray-500">(up to {{ cpu_avail[0].cpus_free_max_node }} CPU{% if cpu_avail[0].mem_free_max_node_mb %}/{{ (cpu_avail[0].mem_free_max_node_mb // 1024) }}G{% endif %} on one node)</span>
            {% else %}
            <span class="text-yellow-700">No partition can start a job immediately — every node is full or unavailable, so jobs will queue.</span>
            {% endif %}
            {% if has_gpus %}
                {% if gpu_avail %}
                <span class="text-gray-400 ml-2">· GPUs now:</span>
                <span class="font-mono font-medium text-green-700">{{ gpu_avail[0].name }}</span>
                <span class="text-gray-500">({{ gpu_avail[0].gpus_schedulable }} {{ gpu_avail[0].gpu_types or 'gpu' }})</span>
                {% else %}
                <span class="text-yellow-700 ml-2">· No GPUs schedulable right now (idle GPUs are on CPU-saturated nodes)</span>
                {% endif %}
            {% endif %}
        </div>
        <div class="mt-1 overflow-x-auto">
            <table class="text-xs w-full">
                <thead>
                    <tr class="text-gray-400 border-b">
                        <th class="text-left pr-3 font-normal py-1">Partition</th>
                        <th class="text-right pr-3 font-normal py-1">Idle/Total CPUs</th>
                        <th class="text-right pr-3 font-normal py-1" title="Largest job that would start immediately — the biggest free slot on a single node (idle CPUs, and free memory). Partition-wide idle counts can't run a job if they're scattered across nodes.">Free now (1 node)</th>
                        {% if has_gpus %}
                        <th class="text-right pr-3 font-normal py-1" title="Schedulable now / idle / total. A GPU is only schedulable if its node also has a free CPU — idle GPUs on a CPU-saturated node can't be claimed, which is why a job queues despite 'idle GPUs'.">GPUs (now/idle/total)</th>
                        {% endif %}
                        <th class="text-right pr-3 font-normal py-1">Nodes</th>
                        <th class="text-right pr-3 font-normal py-1">Mem/Node</th>
                        <th class="text-right pr-3 font-normal py-1">Timelimit</th>
                        <th class="text-left font-normal py-1">Features</th>
                    </tr>
                </thead>
                <tbody>
                    {% for p in ci.partitions %}
                    <tr class="border-b border-gray-100">
                        <td class="pr-3 py-0.5">
                            <span class="font-medium">{{ p.name }}</span>{% if p.is_default %}<span class="text-gray-400" title="Default partition">*</span>{% endif %}
                            {% if p.state and p.state != 'up' %}<span class="ml-1 text-red-500">({{ p.state }})</span>{% endif %}
                        </td>
                        <td class="text-right pr-3 py-0.5 font-mono {% if p.cpus_idle == 0 %}text-red-600{% elif p.cpus_total and p.cpus_idle * 10 < p.cpus_total %}text-yellow-600{% else %}text-green-700{% endif %}">
                            {{ p.cpus_idle }} / {{ p.cpus_total }}
                        </td>
                        <td class="text-right pr-3 py-0.5 font-mono {% if p.cpus_free_max_node == 0 %}text-red-600{% else %}text-green-700{% endif %}"
                            title="Largest job that starts immediately: up to {{ p.cpus_free_max_node }} CPUs{% if p.mem_free_max_node_mb %} + {{ (p.mem_free_max_node_mb // 1024) }}G{% endif %} on a single node{% if p.cpus_free_max_node == 0 %} (no node has a free CPU — jobs will queue){% endif %}">
                            {% if p.cpus_free_max_node %}{{ p.cpus_free_max_node }}c{% if p.mem_free_max_node_mb %}/{{ (p.mem_free_max_node_mb // 1024) }}G{% endif %}{% else %}full{% endif %}
                        </td>
                        {% if has_gpus %}
                        <td class="text-right pr-3 py-0.5 font-mono {% if p.gpus_total == 0 %}text-gray-400{% elif p.gpus_schedulable > 0 %}text-green-700{% elif p.gpus_idle > 0 %}text-yellow-600{% else %}text-red-600{% endif %}"
                            title="{% if p.gpus_total %}{{ p.gpus_schedulable }} schedulable now (on a node with a free CPU), {{ p.gpus_idle }} idle, {{ p.gpus_total }} total{% if p.gpus_idle > p.gpus_schedulable %} — {{ p.gpus_idle - p.gpus_schedulable }} idle GPU(s) are stuck on CPU-saturated nodes{% endif %}{% if p.gpu_types %} · {{ p.gpu_types }}{% endif %}{% else %}no GPUs{% endif %}">
                            {% if p.gpus_total %}{{ p.gpus_schedulable }} / {{ p.gpus_idle }} / {{ p.gpus_total }}{% if p.gpu_types %}<span class="text-gray-400 ml-1">{{ p.gpu_types }}</span>{% endif %}{% else %}—{% endif %}
                        </td>
                        {% endif %}
                        <td class="text-right pr-3 py-0.5 font-mono text-gray-600">{{ p.nodes_total }}</td>
                        <td class="text-right pr-3 py-0.5 font-mono text-gray-600">
                            {% if p.mem_per_node_mb %}{{ (p.mem_per_node_mb // 1024) }}G{% else %}—{% endif %}
                        </td>
                        <td class="text-right pr-3 py-0.5 font-mono text-gray-600">{{ p.timelimit or '—' }}</td>
                        <td class="py-0.5 font-mono text-gray-500">{{ p.features or '—' }}</td>
                    </tr>
                    {% endfor %}
                </tbody>
            </table>
            {% if ci.pending_reasons %}
            <div class="mt-2 text-xs">
                <span class="text-gray-400">Pending jobs by reason:</span>
                {% for reason, count in ci.pending_reasons.items()|sort(attribute=1, reverse=true) %}
                <span class="inline-block ml-1 px-1.5 py-0.5 rounded bg-yellow-50 text-yellow-700 font-mono">{{ reason }} × {{ count }}</span>
                {% endfor %}
            </div>
            {% endif %}
        </div>
    </details>
    {% endif %}
    {% endif %}
    {% endfor %}
</div>
{% else %}
<p class="text-sm text-gray-500">No backends configured</p>
{% endif %}