#pragma once

#include <memory>
#include <string>
#include <span>
#include <glm/glm.hpp>

#include "gfx/vertex_array.hpp"
#include "gfx/texture.hpp"

namespace assets
{
	struct MeshVertex
	{
		glm::vec3 pos;
		glm::vec3 normal;
		glm::vec2 uv;
		glm::vec2 lightmap_uv;
	};

	struct MeshTriangle
	{
		uint32_t vert[3];
	};

	struct MeshMaterialSlot
	{
		std::string name;
		std::shared_ptr<gfx::Texture> texture;
		size_t first_tri = 0;
		size_t num_tris = 0;
	};

	class Mesh
	{
		gfx::VertexArray va_;
		std::vector<MeshMaterialSlot> materials_;

	public:
		Mesh(std::span<MeshVertex> verts, std::span<MeshTriangle> tris, std::span<MeshMaterialSlot> materials);

		static std::shared_ptr<Mesh> LoadFromFile(const std::string& filename);
	};
}