using System;
using System.Numerics;
using System.Runtime.CompilerServices;
using FFXIVClientStructs.FFXIV.Client.System.Memory;

namespace Auspex.Lighting.Internal;

internal sealed class NativeLightHandle : IDisposable
{
	private unsafe GameLightData* data;

	private Vector3 position;

	private Quaternion rotation;

	private Vector3 color;

	private float intensity;

	private float range;

	private float lightAngle;

	private float falloffAngle;

	private AxLightFlags flags;

	private AxFalloffType falloffType;

	private float falloffPower;

	private float shadowNear;

	private float shadowFar;

	private float charaShadowRange;

	public unsafe static NativeLightHandle Create(Vector3 position, AxLightType lightType, AxLightConfig config)
	{
		GameLightData* ptr = IMemorySpace.GetDefaultSpace()->Malloc<GameLightData>(8uL);
		if (LightNativeBridge.Spawn(ptr) == null)
		{
			IMemorySpace.Free(ptr, (ulong)sizeof(GameLightData));
			throw new InvalidOperationException("Failed to spawn game light");
		}
		LightNativeBridge.Create(ptr);
		LightNativeBridge.Finalize(ptr);
		((long*)ptr)[7] |= 2L;
		LightRenderData* renderObject = ptr->RenderObject;
		if (renderObject == null)
		{
			IMemorySpace.Free(ptr, (ulong)sizeof(GameLightData));
			throw new InvalidOperationException("Game did not create RenderObject for light");
		}
		renderObject->Transform = &ptr->Transform;
		renderObject->EmissionType = lightType;
		renderObject->Color = config.Color;
		renderObject->Intensity = config.Intensity;
		renderObject->Range = config.Range;
		renderObject->FalloffType = config.FalloffType;
		renderObject->Falloff = config.FalloffPower;
		renderObject->LightAngle = config.LightAngle;
		renderObject->FalloffAngle = config.FalloffAngle;
		renderObject->CharacterShadowRange = config.CharaShadowRange;
		renderObject->ShadowPlaneNear = config.ShadowNear;
		renderObject->ShadowPlaneFar = config.ShadowFar;
		renderObject->Flags = config.Flags;
		LightNativeBridge.UpdateRange(renderObject);
		Quaternion quaternion = config.Rotation ?? Quaternion.Identity;
		Unsafe.Write<Vector3>((void*)(&ptr->Transform.Position), position);
		Unsafe.Write<Quaternion>((void*)(&ptr->Transform.Rotation), quaternion);
		ptr->Scale = Vector3.One;
		return new NativeLightHandle
		{
			data = ptr,
			position = position,
			rotation = quaternion,
			color = config.Color,
			intensity = config.Intensity,
			range = config.Range,
			lightAngle = config.LightAngle,
			falloffAngle = config.FalloffAngle,
			flags = config.Flags,
			falloffType = config.FalloffType,
			falloffPower = config.FalloffPower,
			shadowNear = config.ShadowNear,
			shadowFar = config.ShadowFar,
			charaShadowRange = config.CharaShadowRange
		};
	}

	public unsafe void UpdatePosition(Vector3 newPosition)
	{
		if (data != null && !(position == newPosition))
		{
			position = newPosition;
			Unsafe.Write<Vector3>((void*)(&data->Transform.Position), newPosition);
		}
	}

	public unsafe void UpdateRotation(Quaternion newRotation)
	{
		if (data != null && !(rotation == newRotation))
		{
			rotation = newRotation;
			Unsafe.Write<Quaternion>((void*)(&data->Transform.Rotation), newRotation);
		}
	}

	public unsafe void UpdateColor(Vector3 newColor)
	{
		if (data != null && data->RenderObject != null && !(color == newColor))
		{
			color = newColor;
			data->RenderObject->Color = newColor;
		}
	}

	public unsafe void UpdateIntensity(float newIntensity)
	{
		if (data != null && data->RenderObject != null && intensity != newIntensity)
		{
			intensity = newIntensity;
			data->RenderObject->Intensity = newIntensity;
		}
	}

	public unsafe void UpdateRange(float newRange)
	{
		if (data != null && data->RenderObject != null && range != newRange)
		{
			range = newRange;
			data->RenderObject->Range = newRange;
			LightNativeBridge.UpdateRange(data->RenderObject);
		}
	}

	public unsafe void UpdateFlags(AxLightFlags newFlags)
	{
		if (data != null && data->RenderObject != null && flags != newFlags)
		{
			flags = newFlags;
			data->RenderObject->Flags = newFlags;
		}
	}

	public unsafe void UpdateAngles(float newLightAngle, float newFalloffAngle)
	{
		if (data != null && data->RenderObject != null && (lightAngle != newLightAngle || falloffAngle != newFalloffAngle))
		{
			lightAngle = newLightAngle;
			falloffAngle = newFalloffAngle;
			data->RenderObject->LightAngle = newLightAngle;
			data->RenderObject->FalloffAngle = newFalloffAngle;
		}
	}

	public unsafe void UpdateFalloff(AxFalloffType newFalloffType, float newFalloffPower)
	{
		if (data != null && data->RenderObject != null && (falloffType != newFalloffType || falloffPower != newFalloffPower))
		{
			falloffType = newFalloffType;
			falloffPower = newFalloffPower;
			data->RenderObject->FalloffType = newFalloffType;
			data->RenderObject->Falloff = newFalloffPower;
		}
	}

	public unsafe void UpdateShadow(float newShadowNear, float newShadowFar, float newCharaShadowRange)
	{
		if (data != null && data->RenderObject != null && (shadowNear != newShadowNear || shadowFar != newShadowFar || charaShadowRange != newCharaShadowRange))
		{
			shadowNear = newShadowNear;
			shadowFar = newShadowFar;
			charaShadowRange = newCharaShadowRange;
			data->RenderObject->ShadowPlaneNear = newShadowNear;
			data->RenderObject->ShadowPlaneFar = newShadowFar;
			data->RenderObject->CharacterShadowRange = newCharaShadowRange;
		}
	}

	internal unsafe void Tick()
	{
		if (data != null)
		{
			LightNativeBridge.UpdateCulling(data);
			LightNativeBridge.UpdateMaterial(data);
		}
	}

	public unsafe void Dispose()
	{
		if (data != null)
		{
			GameLightVTable* virtualTable = data->VirtualTable;
			if (virtualTable != null)
			{
				virtualTable->Cleanup(data);
				virtualTable->Destructor(data, false);
			}
			data = null;
			GC.SuppressFinalize(this);
		}
	}
}