@using ZB.MOM.WW.ScadaBridge.Commons.Entities.Sites

@*
    M10 residual: body component for the template "Add / Edit Native Alarm Source"
    dialog hosted by IDialogService.ShowAsync. Renders ONLY the form fields +
    action buttons inside the host's .modal-body; the host owns the backdrop,
    header, focus trap, Escape, and focus restoration.

    Native alarm sources are a READ-ONLY mirror of OPC UA A&C / MxAccess Gateway
    alarms, so the connection picker is restricted to alarm-capable protocols —
    the page filters that list via AlarmCapableProtocols.IsAlarmCapable and hands
    it in. OnSaveAsync returns null on success (dialog closes with true) or the
    error to render inline (dialog stays open).
*@
<div class="row g-2">
    <div class="col-12">
        <label class="form-label" for="nas-name">Name</label>
        <input id="nas-name" type="text" class="form-control" @bind="_nasName" readonly="@Editing" />
    </div>
    <div class="col-12">
        <label class="form-label" for="nas-connection">Connection</label>
        <select id="nas-connection" class="form-select" @bind="_nasConnection">
            <option value="">— select an alarm-capable connection —</option>
            @foreach (var c in AlarmCapableConnections)
            {
                <option value="@c.Name">@c.Name (@c.Protocol)</option>
            }
        </select>
        @if (AlarmCapableConnections.Count == 0)
        {
            <div class="form-text text-warning">No OPC UA or MxGateway connections defined yet.</div>
        }
    </div>
    <div class="col-12">
        <label class="form-label" for="nas-source-ref">Source Reference</label>
        <input id="nas-source-ref" type="text" class="form-control font-monospace" @bind="_nasSourceRef"
               placeholder="OPC UA SourceNode nodeId, or MxAccess object/area" />
    </div>
    <div class="col-12">
        <label class="form-label" for="nas-filter">Condition Filter <span class="text-muted">(optional)</span></label>
        <input id="nas-filter" type="text" class="form-control" @bind="_nasFilter"
               placeholder="Blank = mirror all conditions under the source" />
    </div>
    <div class="col-12">
        <label class="form-label" for="nas-description">Description <span class="text-muted">(optional)</span></label>
        <input id="nas-description" type="text" class="form-control" @bind="_nasDescription" />
    </div>
    <div class="col-12">
        <div class="form-check">
            <input class="form-check-input" type="checkbox" @bind="_nasIsLocked" id="nasLocked" />
            <label class="form-check-label" for="nasLocked">Locked</label>
        </div>
    </div>
    @if (_error != null)
    {
        <div class="col-12"><div class="text-danger small" data-test="nas-form-error">@_error</div></div>
    }
</div>

<div class="modal-footer px-0 pb-0 mt-3">
    <div class="btn-group btn-group-sm" role="group">
        <button class="btn btn-outline-secondary" @onclick="() => Context.Cancel()" disabled="@_busy">Cancel</button>
        <button class="btn btn-success" @onclick="Submit" disabled="@_busy">@(Editing ? "Save" : "Add")</button>
    </div>
</div>

@code {
    /// <summary>Host-supplied context: Close(true) on a successful save, Cancel on dismiss.</summary>
    [Parameter, EditorRequired] public DialogContext<bool> Context { get; set; } = default!;

    /// <summary>True when editing an existing source (the name becomes read-only).</summary>
    [Parameter] public bool Editing { get; set; }

    [Parameter] public string InitialName { get; set; } = string.Empty;
    [Parameter] public string InitialConnection { get; set; } = string.Empty;
    [Parameter] public string InitialSourceRef { get; set; } = string.Empty;
    [Parameter] public string? InitialFilter { get; set; }
    [Parameter] public string? InitialDescription { get; set; }
    [Parameter] public bool InitialIsLocked { get; set; }

    /// <summary>Connections whose protocol can surface native alarms (OPC UA / MxGateway).</summary>
    [Parameter] public IReadOnlyList<DataConnection> AlarmCapableConnections { get; set; }
        = Array.Empty<DataConnection>();

    /// <summary>
    /// Persists the draft. Returns <c>null</c> on success (the dialog closes with
    /// <c>true</c>) or the message to render inline, leaving the dialog open.
    /// </summary>
    [Parameter, EditorRequired] public Func<NativeSourceDraft, Task<string?>> OnSaveAsync { get; set; } = default!;

    private string _nasName = string.Empty;
    private string _nasConnection = string.Empty;
    private string _nasSourceRef = string.Empty;
    private string? _nasFilter;
    private string? _nasDescription;
    private bool _nasIsLocked;
    private string? _error;
    private bool _busy;

    protected override void OnInitialized()
    {
        _nasName = InitialName;
        _nasConnection = InitialConnection;
        _nasSourceRef = InitialSourceRef;
        _nasFilter = InitialFilter;
        _nasDescription = InitialDescription;
        _nasIsLocked = InitialIsLocked;
    }

    private async Task Submit()
    {
        if (_busy) return;
        _error = null;

        _busy = true;
        try
        {
            var draft = new NativeSourceDraft(
                _nasName,
                _nasConnection,
                _nasSourceRef,
                _nasFilter,
                _nasDescription,
                _nasIsLocked);

            var error = await OnSaveAsync(draft);
            if (error == null)
            {
                Context.Close(true);
            }
            else
            {
                _error = error;
            }
        }
        finally
        {
            _busy = false;
        }
    }

    /// <summary>The authored native alarm source as submitted; the page performs the add/update.</summary>
    /// <param name="Name">Source name (ignored on edit — the stored name is fixed).</param>
    /// <param name="ConnectionName">Alarm-capable data connection to mirror from.</param>
    /// <param name="SourceReference">OPC UA SourceNode nodeId, or MxAccess object/area.</param>
    /// <param name="ConditionFilter">Optional condition filter; blank mirrors every condition.</param>
    /// <param name="Description">Optional free-text description.</param>
    /// <param name="IsLocked">Whether instances may override the binding.</param>
    public sealed record NativeSourceDraft(
        string Name,
        string ConnectionName,
        string SourceReference,
        string? ConditionFilter,
        string? Description,
        bool IsLocked);
}