@using Microsoft.Extensions.Logging
@namespace LANCommander.UI.Components
@inject ILogger<ChatMessageInput> Logger

<FormItem 
    HasFeedback="_hasError" 
    ValidateStatus="_validateStatus"
    Help="@_errorMessage">
    <TextArea 
        @ref="_textArea"
        Disabled="_sendingMessage"
        MinRows="1"
        AutoSize="true"
        BindOnInput
        OnPressEnter="SendMessage"
        @bind-Value="_contents">
    </TextArea>
</FormItem>

@code {
    [Parameter] public EventCallback<string> OnSendMessage { get; set; }
    TextArea _textArea;

    string _contents;
    bool _sendingMessage;

    string _errorMessage = String.Empty;
    FormValidateStatus _validateStatus => _hasError ? FormValidateStatus.Error : FormValidateStatus.Default;
    bool _hasError => !String.IsNullOrWhiteSpace(_errorMessage);
    
    async Task SendMessage(PressEnterEventArgs args)
    {
        if (!args.ShiftKey)
        {
            args.PreventLineBreak();
            
            _sendingMessage = true;

            try
            {
                if (OnSendMessage.HasDelegate)
                    await OnSendMessage.InvokeAsync(_contents);
                
                _contents = String.Empty;
            }
            catch (Exception ex)
            {
                _errorMessage = "Could not send message";
                
                Logger.LogError(ex, "Failure sending message");
            }

            _sendingMessage = false;
            
            await Task.Yield();
            await InvokeAsync(StateHasChanged);
        }
    }
}