#include "Mesh.h"
#include <iostream>
#include <vector>
#include <GL/glew.h>
#include "vec2.h"
#include "vec3.h"
#include "utils.h"

using namespace std;

Mesh::Mesh(vector<float> data)
{
    this->data_size = data.size() / 8;
    cout << "Data size: "  << data.size();

    // Load the shading program. TODO make it so that it gets it from a kind of cache.
    this->program_id = loadShadingProgram("mesh_vs.glsl", "mesh_fs.glsl");

    // Create and bind the VAO:
    glGenVertexArrays(1, &this->vao_id);
    glBindVertexArray(this->vao_id);

    // Create and bind the VBO:
    GLuint vbo_id;
    glGenBuffers(1, &vbo_id);
    glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
    float * float_data = data.data();
    glBufferData(GL_ARRAY_BUFFER, data.size() * sizeof(GLfloat), float_data, GL_STATIC_DRAW);

    // Tell how the data is stored:
    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0); // The location attrib.
    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(3 * sizeof(float))); // The texcoord attrib.
    glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)(5 * sizeof(float))); // The normal attrib.
    glEnableVertexAttribArray(0);
    glEnableVertexAttribArray(1);
    glEnableVertexAttribArray(2);

    glBindVertexArray(0);
    glBindVertexArray(0);
}


void Mesh::draw(vec3 location, vec3 rotation) {

    glUseProgram(this->program_id);
    glBindVertexArray(this->vao_id);
    glDrawArrays(GL_TRIANGLES, 0, this->data_size);

}

Mesh::~Mesh()
{
    //dtor
}