#include "../includes/animations.h"

void cube(int, int);

void lights(int state) {
  static GLuint quadId = 0;
  static GLuint pId = 0;

  switch (state) {
  case GL4DH_INIT:
    quadId = gl4dgGenQuadf();
    pId = gl4duCreateProgram("<vs>shaders/lights.vs", "<fs>shaders/lights.fs",
                             NULL);

    gl4duGenMatrix(GL_FLOAT, "proj");
    gl4duGenMatrix(GL_FLOAT, "mod");
    gl4duGenMatrix(GL_FLOAT, "view");

    glEnable(GL_DEPTH_TEST);
    break;

  case GL4DH_DRAW:
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    static GLdouble lumloc = 0.;
    // clang-format off
    GLfloat rouge[]   = {1.f, 0.f,  0.f, 1.f},
            blanc[]   = {1.f, 1.f,  1.f, 1.f},
            lumpos0[] = {4.f * (float)sin(lumloc), 0.f, 1.1f, 1.f},
            lumpos[4],
            *mat,
            ratio = (GLfloat)_dims[0] / (GLfloat)_dims[1];
    // clang-format on

    // Setup
    gl4duBindMatrix("proj");
    gl4duLoadIdentityf(); // TODO: ça bug??
    gl4duFrustumf(-ratio, ratio, -1, 1, 2, 100);

    // Scene
    gl4duBindMatrix("view");
    gl4duLoadIdentityf();
    gl4duLookAtf(0, 0, 4.0f, 0, 0, 0, 0.0f, 1.0f, 0);

    mat = (GLfloat *)gl4duGetMatrixData();
    MMAT4XVEC4(lumpos, mat, lumpos0);

    gl4duBindMatrix("mod");
    gl4duLoadIdentityf();

    glUseProgram(pId);
    gl4duSendMatrices();

    glUniform4fv(glGetUniformLocation(pId, "scolor"), 1, rouge);
    glUniform4fv(glGetUniformLocation(pId, "lcolor"), 1, blanc);
    glUniform4fv(glGetUniformLocation(pId, "lumpos"), 1, lumpos);
    gl4dgDraw(quadId);

    glUseProgram(0);
    break;

  default:
    break;
  }
}