using System;
using gaemstone.ECS;
using static gaemstone.Flecs.Core;

namespace gaemstone;

[Module]
public class Doc
{
	[Tag]
	public struct DisplayType {  }

	[Tag]
	public struct Relation {  }


	// TODO: These need to actually be read at some point.

	/// <summary>
	/// A display name for this entity.
	/// Names in the entity hierarchy must be unique within the parent entity,
	/// This doesn't apply to display names - they are mostly informational.
	/// Displayed in the Entity Inspector.
	/// </summary>
	[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Enum)]
	public class Name : Attribute
	{
		public string Value { get; }
		public Name(string value) => Value = value;
	}

	/// <summary>
	/// A brief description of this entity.
	/// Displayed in the Entity Inspector.
	/// </summary>
	[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Enum)]
	public class Brief : Attribute
	{
		public string Value { get; }
		public Brief(string value) => Value = value;
	}

	/// <summary>
	/// A detailed description, or full documentation, of this entity's purpose and behaviors.
	/// It's encouraged to use multiple paragraphs and markdown formatting if necessary.
	/// Displayed in the Entity Inspector.
	/// </summary>
	[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Enum)]
	public class Detail : Attribute
	{
		public string Value { get; }
		public Detail(string value) => Value = value;
	}

	/// <summary>
	/// A link to a website relating to this entity, such as
	/// a module's repository, or further documentation.
	/// Displayed in the Entity Inspector.
	/// </summary>
	[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Enum)]
	public class Link : Attribute
	{
		public string Value { get; }
		public Link(string value) => Value = value;
	}

	/// <summary>
	/// A custom color to represent this entity.
	/// Displayed in the Entity Inspector.
	/// </summary>
	[AttributeUsage(AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Enum)]
	public class Color : Attribute
	{
		public float Red { get; }
		public float Green { get; }
		public float Blue { get; }

		public Color(float red, float green, float blue)
		{
			if ((red   < 0.0f) || (red   > 1.0f)) throw new ArgumentOutOfRangeException(nameof(red  ));
			if ((green < 0.0f) || (green > 1.0f)) throw new ArgumentOutOfRangeException(nameof(green));
			if ((blue  < 0.0f) || (blue  > 1.0f)) throw new ArgumentOutOfRangeException(nameof(blue ));
			Red = red; Green = green; Blue = blue;
		}
	}
}