@using ZB.MOM.WW.OtOpcUa.Admin.Services
@using ZB.MOM.WW.OtOpcUa.Configuration.Entities
@inject UnsService UnsSvc

<div class="row">
    <div class="col-md-6">
        <div class="d-flex justify-content-between mb-2">
            <h4>UNS Areas</h4>
            <button class="btn btn-sm btn-primary" @onclick="() => _showAreaForm = true">Add area</button>
        </div>

        @if (_areas is null) { <p>Loading…</p> }
        else if (_areas.Count == 0) { <p class="text-muted">No areas yet.</p> }
        else
        {
            <table class="table table-sm">
                <thead><tr><th>AreaId</th><th>Name</th></tr></thead>
                <tbody>
                @foreach (var a in _areas)
                {
                    <tr><td><code>@a.UnsAreaId</code></td><td>@a.Name</td></tr>
                }
                </tbody>
            </table>
        }

        @if (_showAreaForm)
        {
            <div class="card">
                <div class="card-body">
                    <div class="mb-2"><label class="form-label">Name (lowercase segment)</label><input class="form-control" @bind="_newAreaName"/></div>
                    <button class="btn btn-sm btn-primary" @onclick="AddAreaAsync">Save</button>
                    <button class="btn btn-sm btn-secondary ms-2" @onclick="() => _showAreaForm = false">Cancel</button>
                </div>
            </div>
        }
    </div>
    <div class="col-md-6">
        <div class="d-flex justify-content-between mb-2">
            <h4>UNS Lines</h4>
            <button class="btn btn-sm btn-primary" @onclick="() => _showLineForm = true" disabled="@(_areas is null || _areas.Count == 0)">Add line</button>
        </div>

        @if (_lines is null) { <p>Loading…</p> }
        else if (_lines.Count == 0) { <p class="text-muted">No lines yet.</p> }
        else
        {
            <table class="table table-sm">
                <thead><tr><th>LineId</th><th>Area</th><th>Name</th></tr></thead>
                <tbody>
                @foreach (var l in _lines)
                {
                    <tr><td><code>@l.UnsLineId</code></td><td><code>@l.UnsAreaId</code></td><td>@l.Name</td></tr>
                }
                </tbody>
            </table>
        }

        @if (_showLineForm && _areas is not null)
        {
            <div class="card">
                <div class="card-body">
                    <div class="mb-2">
                        <label class="form-label">Area</label>
                        <select class="form-select" @bind="_newLineAreaId">
                            @foreach (var a in _areas) { <option value="@a.UnsAreaId">@a.Name (@a.UnsAreaId)</option> }
                        </select>
                    </div>
                    <div class="mb-2"><label class="form-label">Name</label><input class="form-control" @bind="_newLineName"/></div>
                    <button class="btn btn-sm btn-primary" @onclick="AddLineAsync">Save</button>
                    <button class="btn btn-sm btn-secondary ms-2" @onclick="() => _showLineForm = false">Cancel</button>
                </div>
            </div>
        }
    </div>
</div>

@code {
    [Parameter] public long GenerationId { get; set; }
    [Parameter] public string ClusterId { get; set; } = string.Empty;

    private List<UnsArea>? _areas;
    private List<UnsLine>? _lines;
    private bool _showAreaForm;
    private bool _showLineForm;
    private string _newAreaName = string.Empty;
    private string _newLineName = string.Empty;
    private string _newLineAreaId = string.Empty;

    protected override async Task OnParametersSetAsync() => await ReloadAsync();

    private async Task ReloadAsync()
    {
        _areas = await UnsSvc.ListAreasAsync(GenerationId, CancellationToken.None);
        _lines = await UnsSvc.ListLinesAsync(GenerationId, CancellationToken.None);
    }

    private async Task AddAreaAsync()
    {
        if (string.IsNullOrWhiteSpace(_newAreaName)) return;
        await UnsSvc.AddAreaAsync(GenerationId, ClusterId, _newAreaName, notes: null, CancellationToken.None);
        _newAreaName = string.Empty;
        _showAreaForm = false;
        await ReloadAsync();
    }

    private async Task AddLineAsync()
    {
        if (string.IsNullOrWhiteSpace(_newLineName) || string.IsNullOrWhiteSpace(_newLineAreaId)) return;
        await UnsSvc.AddLineAsync(GenerationId, _newLineAreaId, _newLineName, notes: null, CancellationToken.None);
        _newLineName = string.Empty;
        _showLineForm = false;
        await ReloadAsync();
    }
}