#include <cmath>
#include <iostream>

#include "Game.h"
#include "MarchingCubes.h"
#include "gaming-core/utils/Array.h"
#include "gaming-core/utils/List.h"
#include "gaming-core/utils/Utils.h"
#include "gaming-core/wrapper/GL.h"

Game::Game(Shader& shader, Shader& noiceShader, LayeredFramebuffer& buffer,
           Buttons& buttons, const Size& size)
    : shader(shader), noiceShader(noiceShader), noiceBuffer(buffer),
      buttons(buttons), size(size), frustum(60, 0.1f, 1000.0f, size),
      up(buttons.add(GLFW_KEY_SPACE, "Up")),
      down(buttons.add(GLFW_KEY_LEFT_SHIFT, "Down")),
      left(buttons.add(GLFW_KEY_A, "left")),
      right(buttons.add(GLFW_KEY_D, "right")),
      front(buttons.add(GLFW_KEY_W, "front")),
      back(buttons.add(GLFW_KEY_S, "back")) {
    rectangleBuffer.setAttributes(Attributes().addFloat(2));
    float data[6][2] = {{-1.0f, -1.0f}, {-1.0, 1.0}, {1.0, -1.0},
                        {1.0f, 1.0f},   {-1.0, 1.0}, {1.0, -1.0}};
    rectangleBuffer.setStaticData(sizeof(data), data);
    noiceBuffer.bindTextureTo(0);
}

void Game::render(float lag) {
    GL::setViewport(64, 64);
    noiceShader.use();
    noiceBuffer.bindAndClear();
    for(int i = 0; i < 64; i++) {
        noiceShader.setFloat("layer", i * (1.0f / 63.0f));
        noiceBuffer.bindLayer(i);
        rectangleBuffer.draw(6);
    }

    GL::setViewport(size.width, size.height);
    shader.use();
    GL::bindMainFramebuffer();
    GL::clearFramebuffer();
    Vector3 interPos = Utils::interpolate(oldPosition, position, lag);
    shader.setMatrix("proj", frustum.updateProjection().getValues());

    Matrix m;
    m.translate(interPos);
    m.translateZ(-30.0f);
    m.translateX(-8.0f);

    shader.setMatrix("view", m.getValues());

    noiceBuffer.bindTextureTo(0);
    emptyBuffer.drawPoints(0);
    glDrawArrays(GL_POINTS, 0, 64 * 64 * 64);
}

void Game::tick() {
    oldPosition = position;
    const float speed = 2.5f;
    if(up.isDown()) {
        position -= Vector3(0.0f, speed, 0.0f);
    }
    if(down.isDown()) {
        position += Vector3(0.0f, speed, 0.0f);
    }
    if(left.isDown()) {
        position += Vector3(speed, 0.0f, 0.0f);
    }
    if(right.isDown()) {
        position -= Vector3(speed, 0.0f, 0.0f);
    }
    if(front.isDown()) {
        position += Vector3(0.0f, 0.0f, speed);
    }
    if(back.isDown()) {
        position -= Vector3(0.0f, 0.0f, speed);
    }
}