@using LANCommander.Server.Logging
@using Microsoft.AspNetCore.SignalR.Client
@using XtermBlazor
@inject ILogger<LogViewer> Logger
@inject MessageService MessageService
@inject NavigationManager NavigationManager

<Xterm @ref="Terminal" Options="TerminalOptions" Addons="@Addons" />

@code {
    Xterm? Terminal;
    HubConnection? HubConnection;

    TerminalOptions TerminalOptions = new TerminalOptions
    {
        CursorBlink = true,
        CursorStyle = CursorStyle.Bar
    };

    HashSet<string> Addons = new HashSet<string>()
    {
        "addon-fit"
    };

    protected override async Task OnInitializedAsync()
    {
        try
        {
            await Connect();
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Log viewer failed to connect");
            MessageService.Error("Log viewer failed to connect");
        }
    }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender)
        {
            await Task.Delay(100);

            await Terminal.Addon("addon-fit").InvokeVoidAsync("fit");
        }
    }

    async Task Connect()
    {
        HubConnection = new HubConnectionBuilder()
            .WithUrl(NavigationManager.ToAbsoluteUri("/logging"))
            .Build();

        HubConnection.On<string, Microsoft.Extensions.Logging.LogLevel, DateTime>("Log", (message, level, timestamp) =>
        {
            var parts = new string[]
            {
                TerminalColor.BrightBlack,
                "[",
                TerminalColor.White,
                timestamp.ToString("HH:mm:ss"),
                TerminalColor.BrightBlack,
                "]",
                GetColorCode(level),
                " ",
                message,
                TerminalColor.Default
            };

            Terminal?.WriteLine(String.Join("", parts));
        });

        await HubConnection.StartAsync();
    }

    string GetColorCode(Microsoft.Extensions.Logging.LogLevel level)
    {
        return level switch
        {
            Microsoft.Extensions.Logging.LogLevel.Trace => TerminalColor.BrightBlack,
            Microsoft.Extensions.Logging.LogLevel.Debug => TerminalColor.BrightCyan,
            Microsoft.Extensions.Logging.LogLevel.Information => TerminalColor.BrightGreen,
            Microsoft.Extensions.Logging.LogLevel.Warning => TerminalColor.BrightYellow,
            Microsoft.Extensions.Logging.LogLevel.Error => TerminalColor.BrightRed,
            Microsoft.Extensions.Logging.LogLevel.Critical => TerminalColor.BrightMagenta,
            _ => TerminalColor.Default,
        };
    }

    public async ValueTask DisposeAsync()
    {
        if (HubConnection is not null)
            await HubConnection.DisposeAsync();
    }
}