using System.Collections.Generic;
using Godot;

public partial class VesselNode : RigidBody3D
{
	public Vessel VesselData = new();
	public List<VesselModuleNode> Modules = [];

	public override void _Ready()
	{
		VesselModuleNode moduleBridge = InstantiateModule("test_module_bridge");
		VesselModuleNode moduleCombined = InstantiateModule("test_module_combined");
		VesselModuleNode moduleEngine1 = InstantiateModule("test_module_engine");
		VesselModuleNode moduleEngine2 = InstantiateModule("test_module_engine");

		CallDeferred(nameof(AttachModule), moduleBridge, moduleCombined, "TestModuleBridge_AnchorBack", "TestModuleCombined_AnchorFront");
		CallDeferred(nameof(AttachModule), moduleBridge, moduleEngine1, "TestModuleBridge_AnchorLeft", "TestModuleEngine_AnchorRight");
		CallDeferred(nameof(AttachModule), moduleBridge, moduleEngine2, "TestModuleBridge_AnchorRight", "TestModuleEngine_AnchorLeft");
	}

	private VesselModuleNode InstantiateModule(string moduleName)
	{
		PackedScene modulePrefab = ResourceLoader.Load<PackedScene>($"res://prefabs/modules/{moduleName}.tscn");
		VesselModuleNode moduleInstance = modulePrefab.Instantiate<VesselModuleNode>();

		CallDeferred("add_child", moduleInstance);

		VesselData.Modules.Add(moduleInstance.ModuleData);
		Modules.Add(moduleInstance);

		return moduleInstance;
	}

	private void AttachModule(VesselModuleNode attachToModule, VesselModuleNode newModule, string existingAnchorName, string newAnchorName)
	{
		Node3D existingAnchor = attachToModule.GetAnchor(existingAnchorName);
		Node3D newAnchor = newModule.GetAnchor(newAnchorName);

		newModule.GlobalTransform = existingAnchor.GlobalTransform * newAnchor.Transform.AffineInverse();
	}
}