@page "/scripted-alarms"
@attribute [Microsoft.AspNetCore.Authorization.Authorize]
@rendermode RenderMode.InteractiveServer
@using Microsoft.AspNetCore.Components.Web
@using ZB.MOM.WW.OtOpcUa.Admin.Services
@using ZB.MOM.WW.OtOpcUa.Configuration.Entities
@using ZB.MOM.WW.OtOpcUa.Configuration.Enums
@inject ScriptedAlarmService AlarmSvc
@inject GenerationService GenerationSvc
@inject ClusterService ClusterSvc
@inject NavigationManager Nav

<h1 class="page-title">Scripted Alarms</h1>
<p class="text-muted">
    OPC UA Part 9 alarms raised by C# predicate scripts. To author scripted alarms, open a cluster
    draft and use the <strong>Scripted Alarms</strong> tab in the draft editor.
    This view lists all scripted alarms across clusters and generations for reference.
</p>

<div class="toolbar mb-3">
    <select class="form-select form-select-sm tb-state" @bind="_filterClusterId" @bind:after="OnClusterChangedAsync">
        <option value="">— all clusters —</option>
        @foreach (var c in _clusters)
        {
            <option value="@c.ClusterId">@c.Name (@c.ClusterId)</option>
        }
    </select>
    <select class="form-select form-select-sm tb-state ms-2" @bind="_filterGenerationId" @bind:after="LoadAlarmsAsync"
            disabled="@(string.IsNullOrEmpty(_filterClusterId))">
        <option value="0">— all generations —</option>
        @foreach (var g in _generations)
        {
            <option value="@g.GenerationId">gen @g.GenerationId (@g.Status) @(g.PublishedAt?.ToString("yyyy-MM-dd") ?? "")</option>
        }
    </select>
    <span class="spacer"></span>
    @if (_alarms is not null) { <span class="tb-count">@_alarms.Count alarm@(_alarms.Count == 1 ? "" : "s")</span> }
</div>

@if (_loading)
{
    <p class="text-muted">Loading…</p>
}
else if (_alarms is null || _alarms.Count == 0)
{
    <section class="panel notice rise" style="animation-delay:.02s">
        No scripted alarms found for the selected filter.
        Open a cluster draft and use the <strong>Scripted Alarms</strong> tab to author scripted alarms.
    </section>
}
else
{
    <section class="panel rise" style="animation-delay:.08s">
        <div class="panel-head">Scripted alarms</div>
        <div class="table-wrap">
            <table class="data-table">
                <thead>
                    <tr>
                        <th>Name</th>
                        <th>Equipment</th>
                        <th>Type</th>
                        <th class="num">Severity</th>
                        <th>Message template</th>
                        <th>Predicate script</th>
                        <th>Historize</th>
                        <th>Retain</th>
                        <th>Enabled</th>
                        <th class="num">Generation</th>
                        <th></th>
                    </tr>
                </thead>
                <tbody>
                @foreach (var a in _alarms)
                {
                    <tr>
                        <td><span class="mono">@a.Name</span></td>
                        <td><span class="mono">@a.EquipmentId</span></td>
                        <td><span class="chip chip-idle">@a.AlarmType</span></td>
                        <td class="num">@a.Severity <small class="text-muted">@SeverityBand(a.Severity)</small></td>
                        <td class="text-truncate" style="max-width:18rem" title="@a.MessageTemplate">
                            <span class="mono small">@a.MessageTemplate</span>
                        </td>
                        <td><span class="mono">@a.PredicateScriptId</span></td>
                        <td>
                            @if (a.HistorizeToAveva) { <span class="chip chip-ok">Aveva</span> }
                            else { <span class="text-muted">—</span> }
                        </td>
                        <td>
                            @if (a.Retain) { <span class="chip chip-ok">yes</span> }
                            else { <span class="text-muted">—</span> }
                        </td>
                        <td>
                            @if (a.Enabled) { <span class="chip chip-ok">enabled</span> }
                            else { <span class="chip chip-idle">disabled</span> }
                        </td>
                        <td class="num">@a.GenerationId</td>
                        <td>
                            @if (DraftLink(a.GenerationId) is { } link)
                            {
                                <a class="btn btn-sm btn-outline-secondary" href="@link">Edit draft</a>
                            }
                        </td>
                    </tr>
                }
                </tbody>
            </table>
        </div>
    </section>
}

@code {
    private List<ServerCluster> _clusters = [];
    private List<ConfigGeneration> _generations = [];
    private List<ScriptedAlarm>? _alarms;
    private string _filterClusterId = string.Empty;
    private long _filterGenerationId;
    private bool _loading;
    private Dictionary<long, (string clusterId, bool isDraft)> _genMap = [];

    protected override async Task OnInitializedAsync()
    {
        _clusters = await ClusterSvc.ListAsync(CancellationToken.None);
        await LoadAlarmsAsync();
    }

    private async Task OnClusterChangedAsync()
    {
        _filterGenerationId = 0;
        _generations = string.IsNullOrEmpty(_filterClusterId)
            ? []
            : await GenerationSvc.ListRecentAsync(_filterClusterId, 20, CancellationToken.None);
        await LoadAlarmsAsync();
    }

    private async Task LoadAlarmsAsync()
    {
        _loading = true;
        _alarms = null;
        try
        {
            var all = new List<ScriptedAlarm>();
            _genMap = [];

            IEnumerable<ConfigGeneration> gens;
            if (!string.IsNullOrEmpty(_filterClusterId) && _filterGenerationId != 0)
            {
                gens = _generations.Where(g => g.GenerationId == _filterGenerationId);
            }
            else if (!string.IsNullOrEmpty(_filterClusterId))
            {
                gens = await GenerationSvc.ListRecentAsync(_filterClusterId, 20, CancellationToken.None);
                _generations = gens.ToList();
            }
            else
            {
                var allGens = new List<ConfigGeneration>();
                foreach (var c in _clusters)
                {
                    var cGens = await GenerationSvc.ListRecentAsync(c.ClusterId, 5, CancellationToken.None);
                    allGens.AddRange(cGens);
                }
                gens = allGens;
            }

            foreach (var g in gens)
            {
                _genMap[g.GenerationId] = (g.ClusterId, g.Status == GenerationStatus.Draft);
                var alarms = await AlarmSvc.ListAsync(g.GenerationId, CancellationToken.None);
                all.AddRange(alarms);
            }

            _alarms = all;
        }
        finally { _loading = false; }
    }

    private string? DraftLink(long generationId)
    {
        if (_genMap.TryGetValue(generationId, out var info) && info.isDraft)
            return $"/clusters/{info.clusterId}/draft/{generationId}";
        return null;
    }

    private static string SeverityBand(int s) => s switch
    {
        <= 250 => "(Low)",
        <= 500 => "(Medium)",
        <= 750 => "(High)",
        _ => "(Critical)",
    };
}