#pragma once
#include <string>
#include <vector>
#include <map>
#include <functional>
namespace LooperUI {
    enum MenuType {
        MenuType_Default,
        MenuType_Item,
        MenuType_Separator,
        MenuType_Application,
        MenuType_Window,
        MenuType_Help,
        MenuType_Services,
    };
    bool MenuTypeValidForSystem(MenuType type);
    class Menu;
    enum class OSOptions {
        AnyOS,
        OnlyMac,
        ExcludeMac
    };
    class MenuItemBase {
        friend class Menu;
        Menu *parent;
        public:
        std::string id;
        MenuType type;
        OSOptions os_options;
        virtual bool IsSubmenu();
        Menu *GetParent();
        bool HasParent();
        bool visible;
        bool enabled;
        std::string title;
        MenuItemBase(std::string title);
        MenuItemBase(MenuType type = MenuType_Separator);
    };
    class MenuItem : public MenuItemBase {
        public:
        void *userdata;
        std::string keybindString;
        std::function<void(MenuItem*, void*)> callback;
        virtual void RunAction() {
            callback(this, userdata);
        }
        MenuItem(std::string title, std::string keybindString, std::function<void(MenuItem*, void*)> callback, void *userdata = nullptr);
    };
    class Menu : public MenuItemBase {
        using container = std::vector<MenuItemBase*>;
        using iterator = container::iterator;
        using const_iterator = container::const_iterator;
        using reverse_iterator = container::reverse_iterator;
        using const_reverse_iterator = container::const_reverse_iterator;
        container children;
        friend class MenuIterator;
        public:
        bool IsSubmenu() override;
        void Append(MenuItemBase *menu);
        iterator begin();
        iterator end();
        const_iterator cbegin() const;
        const_iterator cend() const;
        reverse_iterator rbegin();
        reverse_iterator rend();
        const_reverse_iterator crbegin() const;
        const_reverse_iterator crend() const;
        MenuItemBase *operator [](size_t index);
        void Prepend(MenuItemBase *menu);
        void Insert(MenuItemBase *menu, size_t index);
        Menu(std::string title, MenuType type = MenuType_Default);
    };
    class Menubar {
        
    };
    class MenuBuilder {
        private:
        Menu *root;
        Menu *current_menu;
        bool built;
        void throwIfBuilt();
        public:
        MenuBuilder &BeginSubmenu(std::string title, MenuType type = MenuType_Default, OSOptions allowedOS = OSOptions::AnyOS);
        MenuBuilder &EndSubmenu();
        MenuBuilder &AddSeparator(OSOptions allowedOS = OSOptions::AnyOS);
        MenuBuilder &AddEmptySubmenu(std::string title, MenuType type = MenuType_Default, OSOptions allowedOS = OSOptions::AnyOS);
        MenuBuilder &AddItem(std::string title, std::string keybindString, std::function<void(MenuItem*, void*)> callback, void *userdata = nullptr, OSOptions allowedOS = OSOptions::AnyOS);
        MenuBuilder &AddItemNoUserdata(std::string title, std::string keybindString, std::function<void(MenuItem*)> callback_no_userdata, OSOptions allowedOS = OSOptions::AnyOS);
        MenuBuilder &AddItemSimple(std::string title, std::string keybindString, std::function<void()> callback_simple, OSOptions allowedOS = OSOptions::AnyOS);
        Menu *Build();
        MenuBuilder(std::string rootTitle = "<root>");
    };
    // TODO: For DBusmenu
    struct PlatformData;
    struct MenuIteratorCallbacks {
        inline virtual void Init(Menu *root) { }
        inline virtual void Finalize() { }
        inline virtual void AddNormalItem(MenuItem* item) { }
        inline virtual void BeginSubmenu(Menu *menu) { }
        inline virtual void EndSubmenu() { }
        inline virtual void AddSeparator() { }
    };
    MenuItemBase *FindMenu(Menu *menu, std::string title);
    void IterateMenu(Menu *menu, MenuIteratorCallbacks &callbacks);
    bool PublishMenu(Menu *menu, PlatformData *platform_data = nullptr);
}