using Dalamud.Game.Command;
using FFXIVClientStructs.FFXIV.Client.Graphics.Kernel;
using FFXIVClientStructs.FFXIV.Client.System.Framework;
using FFXIVClientStructs.FFXIV.Client.UI;

namespace Screenie;

internal class Command : IDisposable {
    private Plugin Plugin { get; }
    private const string CommandName = "/screenie";

    internal Command(Plugin plugin) {
        this.Plugin = plugin;

        this.Plugin.CommandManager.AddHandler(CommandName, new CommandInfo(this.OnCommand));
    }

    public void Dispose() {
        this.Plugin.CommandManager.RemoveHandler(CommandName);
    }

    private static unsafe void SetUiVisibility(bool wantVisible) {
        var atkModule = Framework.Instance()->GetUiModule()->GetRaptureAtkModule();
        var hidden = atkModule->RaptureAtkUnitManager.Flags.HasFlag(RaptureAtkModuleFlags.UiHidden);
        if (wantVisible && hidden) {
            atkModule->SetUiVisibility(true);
        }

        if (!wantVisible && !hidden) {
            atkModule->SetUiVisibility(false);
        }
    }

    private void OnCommand(string command, string arguments) {
        // TODO: eventually be able to do like /screenie --no-ui --format png
        //       etc.
        if (arguments == "config") {
            this.Plugin.Ui.Visible ^= true;
            return;
        }

        unsafe {
            var device = Device.Instance();
            var oldWidth = device->Width;
            var oldHeight = device->Height;

            device->NewWidth = 3840;
            device->NewHeight = 2160;
            device->RequestResolutionChange = 1;

            SetUiVisibility(false);

            this.Plugin.Framework.RunOnTick(() => {
                this.Plugin.SaveScreenshot();

                this.Plugin.Framework.RunOnTick(() => {
                    SetUiVisibility(true);
                    device->NewWidth = oldWidth;
                    device->NewHeight = oldHeight;
                    device->RequestResolutionChange = 1;
                });
            });
        }
    }
}