#pragma once

#include <functional>

namespace fn {

// Modos de tema para run_app.
enum class ThemeMode {
    FnDark,    // Identidad del registry (Mantine v9 dark + indigo). DEFAULT.
    ImGuiDark, // Tema estandar de ImGui (ImGui::StyleColorsDark).
    ImGuiLight,
    None,      // No tocar el ImGuiStyle — la app lo configura.
};

struct AppConfig {
    const char* title = "fn_registry";
    int width = 1280;
    int height = 720;
    bool vsync = true;
    bool viewports = false; // Enable multi-viewport: ImGui windows become real OS windows
    ThemeMode theme = ThemeMode::FnDark; // Identidad visual unificada por defecto
    float bg_r = 0.102f; // fn_tokens::colors::bg (dark.7 #1A1B1E)
    float bg_g = 0.106f;
    float bg_b = 0.118f;
};

// Run an ImGui application. The render_fn is called every frame
// between ImGui::NewFrame() and ImGui::Render().
// Returns 0 on clean exit, 1 on error.
int run_app(AppConfig config, std::function<void()> render_fn);

// Convenience: run with default config
int run_app(std::function<void()> render_fn);

} // namespace fn