#pragma once

#include "mathlib.h"
#include "shader.h"
#include "types.h"
#include "webgl_context.h"

struct WebglContext;

/// Responsible for rendering Mesh2Ds
struct Renderer2d {
  WebglContext *context = NULL;
  Mat4x4 projection;
  u32 shader;
  Vector4 clearColor;

  struct {
    i32 position;
    i32 color;

    // TODO: vMatrix is not standard and does not belong here
    i32 vMatrix;
  } attributes;

  struct {
    i32 projection;
    i32 model;
  } uniforms;

  /// Load with the provided context and shader programs. If the shaders are
  /// NULL, the default shader is used
  void load(WebglContext *context, const char *vertexShader = NULL,
            const char *fragmentShader = NULL);
  void render();
  void unload();
  f32 get_width();
  f32 get_height();
};

struct Vertex2D {
  Vector2 position;
  Vector4 color;
  Mat4x4 vMatrix;
};

struct Mesh2D {
  u32 vao;
  u32 vbo;
  u32 ebo = 0;
  u32 numVertices = 0;
  u32 numIndices = 0;
  Mat4x4 model;

  void load(Vertex2D *vertices, u32 numVertices, Renderer2d *renderer);
  void load(Vertex2D *vertices, u32 numVertices, u32 *indices, u32 numIndices,
            Renderer2d *renderer);
  void render(Renderer2d *renderer, GLenum drawType = GL_TRIANGLES);
  void unload();
};