//
// Created by sebastian on 14.02.26.
//

#ifndef DICEWARS_SIEDLER_FRAMEBUFFEROBJECT_H
#define DICEWARS_SIEDLER_FRAMEBUFFEROBJECT_H
#include <stdexcept>

#include "glad/glad.h"


class FramebufferObject {
public:
    FramebufferObject(int width, int height, bool withDepth = true) : width(width), height(height) {
        // Fbo erzeugen
        glGenFramebuffers(1, &fboID);
        glBindFramebuffer(GL_FRAMEBUFFER, fboID);

        // Color Texture
        glGenTextures(1, &colorTextureID);
        glBindTexture(GL_TEXTURE_2D, colorTextureID);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorTextureID, 0);

        if (withDepth) {
            glGenRenderbuffers(1, &rboDepthID);
            glBindRenderbuffer(GL_RENDERBUFFER, rboDepthID);
            glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height);
            glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, rboDepthID);
        }

        if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
            throw std::runtime_error("Framebuffer is incomplete!");
        }

        glBindFramebuffer(GL_FRAMEBUFFER, 0);
    }

    ~FramebufferObject() {
        glDeleteFramebuffers(1, &fboID);
        glDeleteTextures(1, &colorTextureID);
        if (rboDepthID) glDeleteRenderbuffers(1, &rboDepthID);
    }

    void bind() const { glBindFramebuffer(GL_FRAMEBUFFER, fboID); }
    void unbind() const { glBindFramebuffer(GL_FRAMEBUFFER, 0); }

    GLuint getColorTexture() const;

private:
    GLuint fboID = 0;
    GLuint colorTextureID = 0;
    GLuint rboDepthID = 0;
    int width, height;
};


#endif //DICEWARS_SIEDLER_FRAMEBUFFEROBJECT_H