#pragma once

class Shape
{
protected:
    GLuint buffers[2];
    GLuint arrays[2];
    GLuint count[2];
    GLvoid* ioff[2];
    struct vertex_t { glm::vec4 pos; glm::vec2 uvs; };
public:
    bool create_buffers(GLvoid* idx, GLvoid* vertices, int isize, int vsize);
    void draw_fill() const;
    void draw_stroke() const;
};

class Plane : public Shape
{
    void create_impl(float w, float h, int div, GLushort* idx, vertex_t* vertices);
public:
    template<int div>
    bool create(float w, float h)
    {
        static GLushort idx[div * div * 6 + 4];
        static vertex_t vertices[(div+1)*(div+1)];
        create_impl(w, h, div, idx, vertices);
        return create_buffers(idx, vertices, sizeof(idx), sizeof(vertices));
    }
};

class Circle : public Shape
{
    void create_impl(float radius, int div, GLushort* idx, vertex_t* vertices);
    void create_impl(float radius_out, float radius_in, int div, GLushort* idx, vertex_t* vertices);
public:
    template<int div>
    bool create(float radius)
    {
        static GLushort idx[div * 3 + div * 2];
        static vertex_t vertices[div + 1];
        create_impl(radius, div, idx, vertices);
        return create_buffers(idx, vertices, sizeof(idx), sizeof(vertices));
    }
    template<int div>
    bool create(float radius_out, float radius_in)
    {
        static GLushort idx[div*6 + div*4];
        static vertex_t vertices[div * 2];
        create_impl(radius_out, radius_in, div, idx, vertices);
        return create_buffers(idx, vertices, sizeof(idx), sizeof(vertices));
    }
};