#define GLFW_INCLUDE_NONE
#include "GLFW/glfw3.h"

#include "cbt/opengl/context.hpp"

#include <string_view>

#include "glad/glad.h"
#include "fmt/std.h"

namespace cbt::opengl {

auto context::init() -> bool {
    if (!glfwInit()) {
        fmt::print("Failed to initialize GLFW\n");
        return false;
    }
    return true;
}

auto context::terminate() -> void {
    glfwTerminate();
}

auto context::setup_gl() -> bool {
    if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
        fmt::print("Failed to initialize GLAD\n");
        return false;
    }
    print_info();
    return true;
}

auto context::print_info() -> void {
    fmt::print("OpenGL Info:\n");
    fmt::print("  vendor  | {}\n", std::string_view(reinterpret_cast<char const*>(glGetString(GL_VENDOR))));
    fmt::print("  renderer| {}\n", std::string_view(reinterpret_cast<char const*>(glGetString(GL_RENDERER))));
    fmt::print("  version | {}\n", std::string_view(reinterpret_cast<char const*>(glGetString(GL_VERSION))));
    fmt::print("  glsl    | {}\n", std::string_view(reinterpret_cast<char const*>(glGetString(GL_SHADING_LANGUAGE_VERSION))));
    fmt::print("\n");
}

context::context(std::string title, int width, int height) {
    if (!init()) {
        return;
    }
    m_initialized = true;

    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

    m_window = glfwCreateWindow(width, height, title.c_str(), nullptr, nullptr);
    if (!m_window) {
        fmt::print("Failed to create window\n");
        terminate();
        return;
    }

    glfwMakeContextCurrent(m_window);

    if (!setup_gl()) {
        terminate();
        return;
    }
}

context::~context() {
    if (m_window) {
        glfwDestroyWindow(m_window);
    }
    if (m_initialized) {
        terminate();
    }
}

auto context::should_close() const -> bool {
    return m_window && glfwWindowShouldClose(m_window);
}

auto context::valid() const -> bool {
    return m_window != nullptr;
}

auto context::swap_buffers() -> void {
    glfwSwapBuffers(m_window);
}

auto context::poll_events() -> void {
    glfwPollEvents();
}

auto context::raw() const -> GLFWwindow* {
    return m_window;
}

}