@page "/uns/convert-relays"
@* Fleet-wide relay→alias converter. Previews (dry-run) and applies the conversion of pure-relay
   virtual tags into Galaxy alias tags across every equipment. Edits the draft config only; the
   operator publishes normally afterward. FleetAdmin-gated (mirrors RoleGrants.razor). *@
@attribute [Microsoft.AspNetCore.Authorization.Authorize(Policy = "FleetAdmin")]
@rendermode RenderMode.InteractiveServer
@using ZB.MOM.WW.OtOpcUa.AdminUI.Uns
@inject IUnsTreeService Svc

<PageTitle>Convert relays</PageTitle>

<div class="d-flex justify-content-between align-items-center mb-3">
    <h4 class="mb-0">Convert relay virtual-tags to aliases</h4>
    <a href="/uns" class="btn btn-outline-secondary btn-sm">Back to UNS</a>
</div>

<p class="text-muted">
    Sweeps every equipment for pure-relay virtual tags (a script body that simply returns another
    tag's value) and rewrites each one as a Galaxy alias tag. This edits the draft configuration
    only — publish afterward to take effect. Run a preview first to review what will change.
</p>

<div class="d-flex gap-2 align-items-center mb-3">
    <button type="button" class="btn btn-primary" @onclick="PreviewAsync" disabled="@_busy">
        @if (_busy) { <span class="spinner-border spinner-border-sm me-1"></span> }
        Preview
    </button>
    @if (_applied)
    {
        <span class="text-success small">Conversion applied. Publish to take effect.</span>
    }
</div>

@if (!string.IsNullOrWhiteSpace(_error))
{
    <div class="text-danger small mb-3">@_error</div>
}

@if (_preview is not null)
{
    <section class="panel rise mt-2">
        <div class="panel-head">Will convert (@_preview.Converted.Count)</div>
        @if (_preview.Converted.Count == 0)
        {
            <div style="padding:1rem" class="text-muted">No relay virtual-tags to convert.</div>
        }
        else
        {
            <div class="table-wrap">
                <table class="data-table">
                    <thead><tr><th>Equipment</th><th>Virtual tag</th><th>Full name</th><th>Data type</th></tr></thead>
                    <tbody>
                        @foreach (var c in _preview.Converted)
                        {
                            <tr @key="(c.EquipmentId, c.FullName)">
                                <td class="mono">@c.EquipmentId</td>
                                <td>@c.VirtualTagName</td>
                                <td class="mono">@c.FullName</td>
                                <td>@c.DataType</td>
                            </tr>
                        }
                    </tbody>
                </table>
            </div>
        }
    </section>

    <section class="panel rise mt-3">
        <div class="panel-head">Skipped (@_preview.Skipped.Count)</div>
        @if (_preview.Skipped.Count == 0)
        {
            <div style="padding:1rem" class="text-muted">Nothing skipped.</div>
        }
        else
        {
            <div class="table-wrap">
                <table class="data-table">
                    <thead><tr><th>Equipment</th><th>Virtual tag</th><th>Reason</th></tr></thead>
                    <tbody>
                        @foreach (var s in _preview.Skipped)
                        {
                            <tr @key="(s.EquipmentId, s.VirtualTagName)">
                                <td class="mono">@s.EquipmentId</td>
                                <td>@s.VirtualTagName</td>
                                <td>@s.Reason</td>
                            </tr>
                        }
                    </tbody>
                </table>
            </div>
        }
    </section>

    @if (!_preview.Applied && _preview.Converted.Count > 0)
    {
        <div class="d-flex gap-2 align-items-center mt-3">
            @if (!_confirming)
            {
                <button type="button" class="btn btn-warning" @onclick="() => _confirming = true" disabled="@_busy">
                    Apply conversion…
                </button>
            }
            else
            {
                <span class="small">Convert @_preview.Converted.Count relay virtual-tag(s) to aliases in the draft?</span>
                <button type="button" class="btn btn-danger btn-sm" @onclick="ApplyAsync" disabled="@_busy">
                    @if (_busy) { <span class="spinner-border spinner-border-sm me-1"></span> }
                    Yes, apply
                </button>
                <button type="button" class="btn btn-outline-secondary btn-sm" @onclick="() => _confirming = false" disabled="@_busy">
                    Cancel
                </button>
            }
        </div>
    }
}

@code {
    private RelayConversionResult? _preview;
    private bool _busy;
    private bool _confirming;
    private bool _applied;
    private string? _error;

    private async Task PreviewAsync()
    {
        _error = null;
        _confirming = false;
        _applied = false;
        _busy = true;
        try
        {
            _preview = await Svc.ConvertRelayVirtualTagsToAliasesAsync(null, dryRun: true);
        }
        catch (Exception ex) { _error = ex.Message; }
        finally { _busy = false; }
    }

    private async Task ApplyAsync()
    {
        _error = null;
        _busy = true;
        try
        {
            await Svc.ConvertRelayVirtualTagsToAliasesAsync(null, dryRun: false);
            _applied = true;
            _confirming = false;
            // Re-run the preview so the Converted set is now empty and only remaining skips show.
            _preview = await Svc.ConvertRelayVirtualTagsToAliasesAsync(null, dryRun: true);
        }
        catch (Exception ex) { _error = ex.Message; }
        finally { _busy = false; }
    }
}