#pragma once

#include <cstdint>
#include <string>
#include <vector>
#include <glm/glm.hpp>

namespace iris {

struct Mesh {
    std::string name;
    std::vector<glm::vec3> vertices;
    std::vector<glm::vec3> normals;
    std::vector<glm::vec2> texcoords;
    // Note: w component is a sign, 1.0 or -1.0
    std::vector<glm::vec4> tangents;
    std::vector<uint32_t> indices;
    int32_t material_index;

    // AABB
    glm::vec3 p_min;
    glm::vec3 p_max;
};

struct Material {
    std::string name;
    glm::vec4 base_color;
    float metallic;
    float roughness;
};

struct Texture {
};

struct Camera {
    enum struct Tag {
        Perspective,
        Orthographic,
    } intrinsic_tag;
    struct PerspectiveCamera {
        float fovx;
        float fovy;
        float aspect;
        float znear;
        float zfar;
    };

    struct OrthographicCamera {
        float xmag;
        float ymag;
        float znear;
        float zfar;
    };
    union {
        PerspectiveCamera perspective;
        OrthographicCamera orthographic;
    } intrinsic;
    glm::vec3 position;
    glm::vec3 direction;
    glm::vec3 up;
};

struct Scene {
    std::vector<Mesh> meshes;
    std::vector<Material> materials;
    std::vector<Texture> textures;

    Camera camera;
};

} // namespace iris