#include "interface.h"

#include <imgui_impl_glfw.h>
#include <imgui_impl_opengl3.h>

namespace Interface {

void AddWindow(std::vector<Window>& windows, const std::string& name, std::function<void()> renderFunc) {
    windows.emplace_back(name, renderFunc);
}

void RenderWindows(std::vector<Window>& windows) {
    ImGui_ImplOpenGL3_NewFrame();
    ImGui_ImplGlfw_NewFrame();

    ImGuiIO& io = ImGui::GetIO();
    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;

    ImGui::NewFrame();

    static ImGuiDockNodeFlags dockspace_flags = ImGuiDockNodeFlags_PassthruCentralNode;
    ImGuiWindowFlags window_flags = ImGuiWindowFlags_MenuBar | ImGuiWindowFlags_NoDocking;

    // Style windows
    const ImGuiViewport* viewport = ImGui::GetMainViewport();
    ImGui::SetNextWindowPos(viewport->WorkPos);
    ImGui::SetNextWindowSize(viewport->WorkSize);
    ImGui::SetNextWindowViewport(viewport->ID);
    ImGui::PushStyleVar(ImGuiStyleVar_WindowRounding, 0.0f);
    ImGui::PushStyleVar(ImGuiStyleVar_WindowBorderSize, 0.0f);
    window_flags |= ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoMove;
    window_flags |= ImGuiWindowFlags_NoBringToFrontOnFocus | ImGuiWindowFlags_NoNavFocus;
    window_flags |= ImGuiWindowFlags_NoBackground;

    ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(0.0f, 0.0f));
    ImGui::Begin("TerraVisor", nullptr, window_flags);
    ImGui::PopStyleVar(3);

    // Submit the DockSpace
    if (io.ConfigFlags & ImGuiConfigFlags_DockingEnable) {
        ImGuiID dockspace_id = ImGui::GetID("MyDockSpace");
        ImGui::DockSpace(dockspace_id, ImVec2(0.0f, 0.0f), dockspace_flags);
    }

    if (ImGui::BeginMenuBar()) {
        if (ImGui::BeginMenu("Options")) {
            ImGui::Text("Nothing Here Yet, Check Back Later!");

            ImGui::EndMenu();
        }

        ImGui::EndMenuBar();
    }

    ImGui::End();

    for (auto& window : windows) {
        if (window.isOpen && ImGui::Begin(window.name.c_str(), &window.isOpen)) {
            window.size = ImGui::GetWindowSize();
            window.position = ImGui::GetWindowPos();
            if (window.renderContent) {
                window.renderContent();
            }
        }
        ImGui::End();
    }

    ImGui::Render();
    ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
}
}