{% extends "base.html" %}
{% load i18n %}
{% load static %}
{% block title %}{% trans "Instances" %}{% endblock %}
{% block page_heading %}{% trans "Instances" %}{% endblock page_heading %}

{% block page_heading_extra %}
{% if request.user.is_superuser %}
    {% include 'create_inst_block.html' %}
{% endif %}
    {# the list's filters (state, text) and the address search, as one control #}
    <div class="float-end m-1">
        <div class="input-group">
            <select id="state-filter" class="form-select flex-grow-0 w-auto" aria-label="{% trans 'State' %}">
                <option value="">{% trans 'All states' %}</option>
                {% for state in states %}
                    <option>{{ state }}</option>
                {% endfor %}
            </select>
            <input id="filter" class="form-control" type="text" placeholder="{% trans 'Search' %}" aria-label="{% trans 'Search' %}">
            <button type="button" class="btn btn-outline-secondary" id="find-address-open"
                    data-bs-toggle="modal" data-bs-target="#find-address">{% trans "Find IP" %}</button>
        </div>
    </div>
{% endblock page_heading_extra %}

{% block content %}
    {% if show_hosts %}
        {% for compute in computes %}
            {% if compute.status is not True %}
                <div class="alert alert-danger alert-dismissible fade show" role="alert">
                    {% trans 'Problem occurred with host' %} {{ compute.name }}: {{ compute.connection_error }}
                    <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
                </div>
            {% endif %}
        {% endfor %}
    {% elif own_hosts_down %}
        <div class="alert alert-warning alert-dismissible fade show" role="alert">
            {% trans 'A host of some of your virtual machines cannot be reached right now.' %}
            <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
        </div>
    {% endif %}
    <div class="col-lg-12">
        {% if app_settings.VIEW_INSTANCES_LIST_STYLE == 'grouped' and request.user.is_superuser %}
            {% include 'allinstances_index_grouped.html' %}
        {% else %}
            {% include 'allinstances_index_nongrouped.html' %}
        {% endif %}
    </div>
    <div class="modal fade" id="find-address" tabindex="-1" aria-labelledby="find-address-title" aria-hidden="true"
         data-url="{% url 'instances:find_address' %}" data-failed="{% trans "The search did not go through. Try again." %}"
         data-none="{% trans "No running VM reports this address." %}"
         data-none-mac="{% trans "No VM has a network card with this MAC address." %}"
         data-unregistered="{% trans "(not registered in the panel)" %}" data-conflict="{% trans "possible conflict" %}"
         data-checked="{% trans "Running VMs checked: %(n)s." %}"
         data-no-agent="{% trans "%(n)s had no connected guest agent; a static address on them cannot be seen." %}"
         data-unread="{% trans "Guest agents not read (a paused VM, no answer in time, or an error): %(n)s." %}"
         data-hosts-down="{% trans "Not reached: %(hosts)s." %}"
         data-hosts-unfinished="{% trans "Not finished in time: %(hosts)s." %}"
         data-read-at="{% trans "Read at %(time)s." %}"
         data-some-unchecked="{% trans "Some of your VMs could not be checked." %}">
        <div class="modal-dialog modal-lg modal-dialog-scrollable">
            <div class="modal-content">
                <div class="modal-header">
                    <h2 class="modal-title h5" id="find-address-title">{% trans "Find the VMs using an IP or MAC address" %}</h2>
                    <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="{% trans "Close" %}"></button>
                </div>
                <div class="modal-body">
                    <form id="find-address-form" class="d-flex gap-2 mb-3">
                        <label class="visually-hidden" for="find-address-q">{% trans "IP address, network or MAC address" %}</label>
                        <input type="text" class="form-control" name="q" id="find-address-q" required
                               placeholder="192.0.2.10, 192.0.2.0/24 {% trans "or" %} 52:54:00:12:34:56">
                        <button type="submit" class="btn btn-primary">{% trans "Find" %}</button>
                    </form>
                    <div class="alert alert-danger d-none" role="alert" id="find-address-error"></div>
                    <div class="table-responsive">
                        <table class="table table-sm d-none align-middle" id="find-address-results">
                            <thead>
                                <tr>
                                    <th scope="col">{% trans "Address" %}</th>
                                    <th scope="col">{% trans "VM" %}</th>
                                    <th scope="col">{% trans "MAC" %}</th>
                                    <th scope="col">{% trans "Source" %}</th>
                                    {% if show_hosts %}<th scope="col">{% trans "Host" %}</th>{% endif %}
                                </tr>
                            </thead>
                            <tbody></tbody>
                        </table>
                    </div>
                    <p class="small text-body-secondary mb-0" id="find-address-coverage"></p>
                </div>
            </div>
        </div>
    </div>
{% endblock content %}
{% block script %}
    <script src="{% static 'js/table_filter.js' %}"></script>
    <script src="{% static 'js/find_address.js' %}"></script>
    {% if request.user.is_superuser %}
        <script>
            // The new-VM dialog's CPU bars and capacity lines, read when the
            // dialog opens, two reads at a time: a CPU read holds a worker for
            // a second, a capacity read while it reads the host's VMs. Answers
            // of an earlier opening are ignored.
            const addInstance = document.getElementById("AddInstance");
            let opening = 0, queue = [], reading = 0;

            function setCpuUsage(cell, percent, text) {
                const meter = cell.querySelector(".progress");
                cell.querySelector(".progress-bar").style.width = (percent || 0) + "%";
                if (percent === null) {
                    meter.removeAttribute("aria-valuenow");
                } else {
                    meter.setAttribute("aria-valuenow", percent);
                }
                cell.querySelector(".cpu-usage-value").textContent = text;
            }

            // data: the answer, or null when the read failed
            function show(element, data) {
                if (element.classList.contains("compute-capacity")) {
                    element.textContent = data === null ? "" : data.trim();
                    return;
                }
                const usage = data !== null && typeof data.cpudata === "number" ? Math.round(data.cpudata) : null;
                setCpuUsage(element, usage, usage === null ? "—" : usage + "%");
            }

            function readNext() {
                while (reading < 2 && queue.length) {
                    const element = queue.shift(), current = opening;
                    reading++;
                    $.get(element.dataset.url)
                        .done((data) => { if (current === opening) show(element, data); })
                        .fail(() => { if (current === opening) show(element, null); })
                        .always(() => { reading--; readNext(); });
                }
            }

            addInstance.addEventListener("show.bs.modal", function () {
                opening++;
                addInstance.querySelectorAll(".cpu-usage").forEach((cell) => setCpuUsage(cell, null, "…"));
                // host by host, as the list shows them
                queue = Array.from(addInstance.querySelectorAll(".cpu-usage, .compute-capacity"));
                readNext();
            });
            addInstance.addEventListener("hide.bs.modal", function () {
                opening++;
                queue = [];
            });
        </script>
    {% endif %}
{% endblock script %}