@using LANCommander.SDK.PowerShell
@using LANCommander.Server.Services.PowerShell
@using XtermBlazor
@using LogLevel = Microsoft.Extensions.Logging.LogLevel
@inherits FeedbackComponent<PackagingDialogOptions>
@inject ScriptDebugger ScriptDebugger
@inject GameService GameService
@inject ToolService ToolService
@inject RedistributableService RedistributableService
@inject ILogger<PackagingDialog> Logger
@implements IDisposable

<div class="packaging-dialog">
    @if (_status == PackagingStatus.Complete)
    {
        <Result Status="ResultStatus.Success"
                Title="Packaging Complete"
                SubTitle="@($"Completed in {FormatTimeSpan(_elapsed)}")">
        </Result>
    }
    else if (_status == PackagingStatus.Failed)
    {
        <Result Status="ResultStatus.Error"
                Title="Packaging Failed"
                SubTitle="@(_errorMessage ?? "The packaging script encountered an error.")">
        </Result>
    }
    else if (_status == PackagingStatus.Stopped)
    {
        <Result Status="ResultStatus.Warning"
                Title="Packaging Stopped"
                SubTitle="The packaging script was stopped by the user.">
        </Result>
    }

    <div class="packaging-terminal">
        @if (_status == PackagingStatus.Running)
        {
            <Flex Justify="FlexJustify.SpaceBetween">
                <span>@FormatElapsed()</span>
                
                <Tooltip Title="Stop">
                    <Button Type="ButtonType.Text" Icon="@IconType.Outline.Stop"/>
                </Tooltip>
            </Flex>
        }

        <Terminal @ref="_terminal" Id="@_id.ToString()" Options="_terminalOptions" OnFirstRender="OnTerminalReady" />
    </div>
</div>

@code {
    enum PackagingStatus { Running, Complete, Failed, Stopped }

    Guid _id = Guid.NewGuid();
    Terminal? _terminal;
    CancellationTokenSource? _cts;
    DateTime? _startTime;
    TimeSpan _elapsed;
    System.Threading.Timer? _elapsedTimer;

    PackagingStatus _status = PackagingStatus.Running;
    bool _hasErrors;
    string? _errorMessage;

    readonly TerminalOptions _terminalOptions = new()
    {
        CursorBlink = false,
        CursorStyle = CursorStyle.Bar,
    };

    protected override async Task OnInitializedAsync()
    {
        _status = PackagingStatus.Running;
        _hasErrors = false;
        _errorMessage = null;

        ScriptDebugger.OnStart = Start;
        ScriptDebugger.OnEnd = End;
        ScriptDebugger.OnOutput = Output;
        ScriptDebugger.OnBreak = null;

        _cts?.Dispose();
        _cts = new CancellationTokenSource();
        _startTime = DateTime.UtcNow;

        _elapsedTimer = new System.Threading.Timer(
            _ => InvokeAsync(StateHasChanged),
            null,
            TimeSpan.Zero,
            TimeSpan.FromSeconds(1));
    }

    async Task OnTerminalReady()
    {
        if (_terminal != null)
            await _terminal.FitAsync();

        await RunAsync();
    }

    async Task RunAsync()
    {
        try
        {
            if (Options.GameId != Guid.Empty)
                await GameService.PackageAsync(Options.GameId);
            else if (Options.ToolId != Guid.Empty)
                await ToolService.PackageAsync(Options.ToolId);
            else if (Options.RedistributableId != Guid.Empty)
                await RedistributableService.PackageAsync(Options.RedistributableId);
        }
        catch (Exception ex)
        {
            _hasErrors = true;
            _errorMessage = ex.Message;
            Logger.LogError(ex, "Packaging failed with an exception");

            if (_terminal != null)
                await _terminal.WriteLine(ex.Message, LogLevel.Error);

            StopTimer();
            _elapsed = _startTime.HasValue ? DateTime.UtcNow - _startTime.Value : TimeSpan.Zero;
            _status = PackagingStatus.Failed;
            await InvokeAsync(StateHasChanged);
        }

    }

    async Task Start(IScriptDebugContext context)
    {
        if (_terminal == null)
            return;

        await InvokeAsync(StateHasChanged);
    }

    async Task End(IScriptDebugContext context)
    {
        StopTimer();
        
        _elapsed = _startTime.HasValue ? DateTime.UtcNow - _startTime.Value : TimeSpan.Zero;

        if (_terminal != null)
            await _terminal.WriteLine($"\nCompleted in {FormatTimeSpan(_elapsed)}", LogLevel.Information);

        _status = _hasErrors ? PackagingStatus.Failed : PackagingStatus.Complete;
        
        await InvokeAsync(StateHasChanged);
    }

    async Task Output(IScriptDebugContext context, LogLevel level, string message)
    {
        if (_terminal == null)
            return;

        if (level == LogLevel.Error)
        {
            _hasErrors = true;
            _errorMessage ??= message;
        }

        try
        {
            await _terminal.WriteLine(message, level);
        }
        catch
        {
        }
    }

    async Task Stop()
    {
        _cts?.Cancel();
        StopTimer();
        
        _elapsed = _startTime.HasValue ? DateTime.UtcNow - _startTime.Value : TimeSpan.Zero;

        if (_terminal != null)
            await _terminal.WriteLine("\nScript stopped by user.", LogLevel.Warning);

        _status = PackagingStatus.Stopped;
        
        await InvokeAsync(StateHasChanged);
    }

    void StopTimer()
    {
        _elapsedTimer?.Dispose();
        _elapsedTimer = null;
    }

    string FormatElapsed()
    {
        if (!_startTime.HasValue)
            return "";

        var elapsed = DateTime.UtcNow - _startTime.Value;
        
        return FormatTimeSpan(elapsed);
    }

    static string FormatTimeSpan(TimeSpan ts)
    {
        if (ts.TotalHours >= 1)
            return ts.ToString(@"h\:mm\:ss");

        return ts.ToString(@"m\:ss");
    }

    public void Dispose()
    {
        _cts?.Cancel();
        _cts?.Dispose();
        StopTimer();
    }
}