using AcDream.Plugin.Abstractions;

namespace AcDream.Plugins.MossTank;

/// <summary>
/// MossTank — a self-buffing plugin, and the first consumer of acdream's
/// plugin automation surface.
/// </summary>
/// <remarks>
/// Named for the mosswart, and for the Virindi Tank lineage this milestone is
/// modelled on. The buff policy lives here rather than in the host on purpose:
/// the host publishes spell data and a cast primitive, the plugin decides what
/// to cast. See <c>docs/research/2026-07-29-vtank-plugin-automation-requirements.md</c>.
/// </remarks>
public sealed class MossTankPlugin : IAcDreamPlugin
{
    private IPluginHost? _host;
    private MossTankPanel? _panel;
    private Action<double>? _tick;
    private IDisposable? _commandRegistration;

    public void Initialize(IPluginHost host)
    {
        _host = host;
        _panel = new MossTankPanel(host);
        host.Log.Info("MossTank initialized");
    }

    public void Enable()
    {
        if (_host is null || _panel is null)
            return;

        // Markup ships beside the plugin assembly, so it is found relative to
        // this DLL rather than the host's working directory -- plugins are
        // loaded from their own directory and the two are not the same.
        string directory =
            Path.GetDirectoryName(typeof(MossTankPlugin).Assembly.Location) ?? ".";

        _host.Ui.AddPanel(
            new PluginPanelDescriptor("main", "MossTank")
            {
                IconText = "MT",
                StartVisible = true,
                ShowInSidePanel = true,
            },
            Path.Combine(directory, "mosstank.xml"),
            _panel);

        _commandRegistration = _host.Commands.Register(
            "vt",
            _panel.ExecuteVtankCommand);

        _tick = _panel.OnTick;
        _host.Events.Tick += _tick;

        _host.Log.Info(
            _host.Automation.IsAvailable
                ? "MossTank enabled"
                : "MossTank enabled (no live session yet; the Buff button will "
                  + "report 'Not in world' until one is up)");
    }

    public void Disable()
    {
        if (_host is not null && _tick is not null)
            _host.Events.Tick -= _tick;
        _commandRegistration?.Dispose();
        _commandRegistration = null;
        _tick = null;
        _panel?.Disable();
        _host?.Log.Info("MossTank disabled");
    }
}