@using LANCommander.SDK.PowerShell
@using LANCommander.SDK.Services
@using LANCommander.Server.Services.PowerShell
@using XtermBlazor
@using LogLevel = Microsoft.Extensions.Logging.LogLevel
@inject ScriptDebugger ScriptDebugger
@inject ScriptClient ScriptClient
@inject GameService GameService
@inject ToolService ToolService
@inject RedistributableService RedistributableService

<div class="terminal @(Active ? "" : "hidden")">
    @if (Active)
    {
        <div style="display: flex; align-items: center; justify-content: space-between; padding: 4px 8px; background: #1e1e1e; border-bottom: 1px solid #333; color: #ccc; font-size: 12px; font-family: monospace;">
            <span>@FormatElapsed()</span>
            <button @onclick="Stop" title="Stop script" style="background: #c0392b; color: white; border: none; padding: 2px 10px; cursor: pointer; font-size: 12px;">Stop</button>
        </div>
    }

    <Terminal @ref="_terminal" Id="@Id.ToString()" Options="_options" />
</div>

@code {
    [Parameter] public Guid Id { get; set; }
    [Parameter] public bool Active { get; set; }
    [Parameter] public EventCallback<bool> ActiveChanged { get; set; }

    private Terminal? _terminal;
    private CancellationTokenSource? _cts;
    private DateTime? _startTime;
    private System.Threading.Timer? _elapsedTimer;

    private readonly TerminalOptions _options = new()
    {
        CursorBlink = true,
        CursorStyle = CursorStyle.Bar,
    };

    async Task SetActive(bool active)
    {
        Active = active;

        if (ActiveChanged.HasDelegate)
            await ActiveChanged.InvokeAsync(Active);
    }

    private void InitializeDebugger()
    {
        ScriptDebugger.OnBreak = Break;
        ScriptDebugger.OnStart = Start;
        ScriptDebugger.OnEnd = End;
        ScriptDebugger.OnOutput = Output;

        ScriptClient.Debug = true;

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

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

    public async Task DebugPackagingScript(Guid gameId)
    {
        InitializeDebugger();
        await GameService.PackageAsync(gameId);
    }

    public async Task DebugToolPackagingScript(Guid toolId)
    {
        InitializeDebugger();
        await ToolService.PackageAsync(toolId);
    }

    public async Task DebugRedistributablePackagingScript(Guid redistributableId)
    {
        InitializeDebugger();
        await RedistributableService.PackageAsync(redistributableId);
    }

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

        await _terminal.Clear();
        await SetActive(true);
        await InvokeAsync(StateHasChanged);

        await _terminal.Focus();
        await _terminal.FitAsync();
    }

    public async Task End(IScriptDebugContext context)
    {
        StopTimer();

        if (_terminal != null && _startTime.HasValue)
        {
            var elapsed = DateTime.UtcNow - _startTime.Value;
            await _terminal.WriteLine($"\nCompleted in {FormatTimeSpan(elapsed)}", LogLevel.Information);
        }

        await SetActive(false);
        await InvokeAsync(StateHasChanged);
    }

    public async Task Break(IScriptDebugContext context)
    {
        if (_terminal is null)
            return;

        while (true)
        {
            var input = await _terminal.ReadLineAsync();

            if (input.Trim().Equals("exit", StringComparison.OrdinalIgnoreCase))
                break;

            if (input.StartsWith('$'))
                input = "Write-Host " + input;

            await context.ExecuteAsync(input);
        }
    }

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

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

        }
    }

    async Task Stop()
    {
        _cts?.Cancel();
        StopTimer();

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

        await SetActive(false);
        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");
    }
}