//
// Created by lukas on 05.02.22.
//

#include "BlockRenderer.h"
#include "../gl/Texture.h"

#define GL_GLEXT_PROTOTYPES

#include <GL/gl.h>

VertexArray *BlockRenderer::setVertexArray() {
    //    float cube_vertices[] = {
    //            // front
    //            -1.0, -1.0, 1.0, 0.0f, 0.0f,
    //            1.0, -1.0, 1.0, 1.0f, 0.0f,
    //            1.0, 1.0, 1.0, 0.0f, 1.0f,
    //            -1.0, 1.0, 1.0, 1.0f, 1.0f,
    //            // back
    //            -1.0, -1.0, -1.0, 0.0f, 0.0f,
    //            1.0, -1.0, -1.0, 1.0f, 0.0f,
    //            1.0, 1.0, -1.0, 0.0f, 1.0f,
    //            -1.0, 1.0, -1.0, 1.0f, 1.0f,
    //    };

    float cube_vertices[] = {
            // front
            -1, -1, 1, 0, 0,
            1, -1, 1, 1, 0,
            1, 1, 1, 0, 1,
            -1, 1, 1, 1, 1,
            // back
            -1, -1, -1, 0, 0,
            1, -1, -1, 1, 0,
            1, 1, -1, 0, 1,
            -1, 1, -1, 1, 1,
    };

    float cubee[] = {
            // face #1
            1, 1, 1, 1, 0,
            -1, 1, 1, 1, 1,
            -1, -1, 1, 0, 1,
            1, -1, 1, 0, 0,

            // face #2
            1, 1, 1, 1, 0,
            1, -1, 1, 1, 1,
            1, -1, -1, 0, 1,
            1, 1, -1, 0, 0,

            // face #3
            1, 1, 1, 1, 0,
            1, 1, -1, 1, 1,
            -1, 1, -1, 0, 1,
            -1, 1, 1, 0, 0,

            // face #4
            -1, -1, -1, 1, 0,
            -1, 1, -1, 1, 1,
            1, 1, -1, 0, 1,
            1, -1, -1, 0, 0,

            // face #5
            -1, -1, -1, 1, 0,
            -1, -1, 1, 1, 1,
            -1, 1, 1, 0, 1,
            -1, 1, -1, 0, 0,

            // face #6
            -1, -1, -1, 1, 0,
            1, -1, -1, 1, 1,
            1, -1, 1, 0, 1,
            -1, -1, 1, 0, 0,};

    // Generate a vertex buffer
    auto *vb = new VertexBuffer(cubee, sizeof(cubee));
    return new VertexArray(*vb);
}

IndexBuffer *BlockRenderer::setIndexBuffer() {
    unsigned indexx[] = {
            0, 1, 2,
            2, 3, 0,

            4, 5, 6,
            6, 7, 4,

            8, 9, 10,
            10, 11, 8,

            12, 13, 14,
            14, 15, 12,

            16, 17, 18,
            18, 19, 16,

            20, 21, 22,
            22, 23, 20,

            24, 25, 26,
            26, 27, 24,

            28, 29, 30,
            30, 31, 28
    };

    unsigned cube_elements[] = {
            // front
            0, 1, 2,
            2, 3, 0,
            // right
            1, 5, 6,
            6, 2, 1,
            // back
            7, 6, 5,
            5, 4, 7,
            // left
            4, 0, 3,
            3, 7, 4,
            // bottom
            4, 5, 1,
            1, 0, 4,
            // top
            3, 2, 6,
            6, 7, 3
    };

    return new IndexBuffer(indexx, 48);
}

Shader BlockRenderer::setShader() {
    const std::string vertsrc =

#include "vertex.shader"

    const std::string geosrc =

#include "geometry.shader"

    const std::string fragsrc =

#include "fragment.shader"

    Shader s;
    s.loadShader(vertsrc, geosrc, fragsrc);
    s.Bind();

    Texture t;
    t.Bind();
    glUniform1i(s.getUniformHandle("u_texture"), 0);


    return s;
}

BlockRenderer::BlockRenderer() {}