#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include <iostream>

// Variables para controlar la rotación del cubo
float rotationX = 0.0f;
float rotationY = 0.0f;
float lastX = 0.0f;
float lastY = 0.0f;
bool mouseLeftPressed = false;

// Función para manejar el movimiento del mouse
void mouse_callback(GLFWwindow* window, double xpos, double ypos) {
    if (mouseLeftPressed) {
        float deltaX = xpos - lastX;
        float deltaY = ypos - lastY;
        rotationX += deltaY * 0.5f;
        rotationY += deltaX * 0.5f;
    }
    lastX = xpos;
    lastY = ypos;
}

// Función para manejar los eventos del mouse
void mouse_button_callback(GLFWwindow* window, int button, int action, int mods) {
    if (button == GLFW_MOUSE_BUTTON_LEFT) {
        if (action == GLFW_PRESS) {
            mouseLeftPressed = true;
        } else if (action == GLFW_RELEASE) {
            mouseLeftPressed = false;
        }
    }
}

// Función para dibujar el cubo
void drawCube() {
    GLfloat vertices[] = {
        // Front face
        -0.5f, -0.5f,  0.5f,  0.5f, -0.5f,  0.5f,  0.5f,  0.5f,  0.5f,
         0.5f,  0.5f,  0.5f, -0.5f,  0.5f,  0.5f, -0.5f, -0.5f,  0.5f,

        // Back face
        -0.5f, -0.5f, -0.5f,  0.5f, -0.5f, -0.5f,  0.5f,  0.5f, -0.5f,
         0.5f,  0.5f, -0.5f, -0.5f,  0.5f, -0.5f, -0.5f, -0.5f, -0.5f,

        // Left face
        -0.5f, -0.5f, -0.5f, -0.5f, -0.5f,  0.5f, -0.5f,  0.5f,  0.5f,
        -0.5f,  0.5f,  0.5f, -0.5f,  0.5f, -0.5f, -0.5f, -0.5f, -0.5f,

        // Right face
         0.5f, -0.5f, -0.5f,  0.5f, -0.5f,  0.5f,  0.5f,  0.5f,  0.5f,
         0.5f,  0.5f,  0.5f,  0.5f,  0.5f, -0.5f,  0.5f, -0.5f, -0.5f,

        // Top face
        -0.5f,  0.5f, -0.5f,  0.5f,  0.5f, -0.5f,  0.5f,  0.5f,  0.5f,
         0.5f,  0.5f,  0.5f, -0.5f,  0.5f,  0.5f, -0.5f,  0.5f, -0.5f,

        // Bottom face
        -0.5f, -0.5f, -0.5f,  0.5f, -0.5f, -0.5f,  0.5f, -0.5f,  0.5f,
         0.5f, -0.5f,  0.5f, -0.5f, -0.5f,  0.5f, -0.5f, -0.5f, -0.5f
    };

    glEnableClientState(GL_VERTEX_ARRAY);
    glVertexPointer(3, GL_FLOAT, 0, vertices);
    glDrawArrays(GL_TRIANGLES, 0, 36);
    glDisableClientState(GL_VERTEX_ARRAY);
}

int main() {
    if (!glfwInit()) {
        std::cerr << "Failed to initialize GLFW" << std::endl;
        return -1;
    }

    GLFWwindow* window = glfwCreateWindow(800, 600, "Rotating Cube", NULL, NULL);
    if (!window) {
        std::cerr << "Failed to create GLFW window" << std::endl;
        glfwTerminate();
        return -1;
    }

    glfwMakeContextCurrent(window);
    glewExperimental = GL_TRUE;
    if (glewInit() != GLEW_OK) {
        std::cerr << "Failed to initialize GLEW" << std::endl;
        return -1;
    }

    glEnable(GL_DEPTH_TEST);

    glfwSetCursorPosCallback(window, mouse_callback);
    glfwSetMouseButtonCallback(window, mouse_button_callback);

    // Configuración de la proyección
    glMatrixMode(GL_PROJECTION);
    gluPerspective(45.0f, 800.0f / 600.0f, 0.1f, 100.0f);
    glMatrixMode(GL_MODELVIEW);

    while (!glfwWindowShouldClose(window)) {
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        glLoadIdentity();
        glTranslatef(0.0f, 0.0f, -5.0f);
        glRotatef(rotationX, 1.0f, 0.0f, 0.0f);
        glRotatef(rotationY, 0.0f, 1.0f, 0.0f);

        drawCube();

        glfwSwapBuffers(window);
        glfwPollEvents();
    }

    glfwDestroyWindow(window);
    glfwTerminate();
    return 0;
}