#pragma once

#include "../external/json/json.hpp"
#include "casts.hpp"
#include "general.hpp"
#include "../DefaultInclude.hpp"
#include <cocos2d.h>
#include <functional>
#include <type_traits>
#include "../loader/Event.hpp"

// support converting ccColor3B / ccColor4B to / from json
namespace cocos2d {
    void GEODE_DLL to_json(nlohmann::json& json, cocos2d::ccColor3B const& color);
    void GEODE_DLL from_json(nlohmann::json const& json, cocos2d::ccColor3B& color);
    void GEODE_DLL to_json(nlohmann::json& json, cocos2d::ccColor4B const& color);
    void GEODE_DLL from_json(nlohmann::json const& json, cocos2d::ccColor4B& color);
}

// operators for CC geometry
namespace geode {
    static cocos2d::CCPoint& operator*=(cocos2d::CCPoint& pos, float mul) {
        pos.x *= mul;
        pos.y *= mul;
        return pos;
    }

    static cocos2d::CCSize& operator*=(cocos2d::CCSize& size, float mul) {
        size.width *= mul;
        size.height *= mul;
        return size;
    }

    static cocos2d::CCSize operator*(cocos2d::CCSize const& size, cocos2d::CCPoint const& point) {
        return {
            size.width * point.x,
            size.height * point.y,
        };
    }

    static cocos2d::CCRect operator*=(cocos2d::CCRect& rect, float mul) {
        rect.origin *= mul;
        rect.size *= mul;
        return rect;
    }

    static cocos2d::CCRect operator*(cocos2d::CCRect const& rect, float mul) {
        return {
            rect.origin.x * mul,
            rect.origin.y * mul,
            rect.size.width * mul,
            rect.size.height * mul,
        };
    }

    static cocos2d::CCPoint operator/=(cocos2d::CCPoint& pos, float div) {
        pos.x /= div;
        pos.y /= div;
        return pos;
    }

    static cocos2d::CCSize operator/=(cocos2d::CCSize& size, float div) {
        size.width /= div;
        size.height /= div;
        return size;
    }

    static cocos2d::CCRect operator/=(cocos2d::CCRect& rect, float div) {
        rect.origin /= div;
        rect.size /= div;
        return rect;
    }

    static cocos2d::CCPoint operator+=(cocos2d::CCPoint& pos, cocos2d::CCPoint const& add) {
        pos.x += add.x;
        pos.y += add.y;
        return pos;
    }

    static cocos2d::CCSize operator+=(cocos2d::CCSize& size, cocos2d::CCPoint const& add) {
        size.width += add.x;
        size.height += add.y;
        return size;
    }

    static cocos2d::CCSize operator+=(cocos2d::CCSize& size, cocos2d::CCSize const& add) {
        size.width += add.width;
        size.height += add.height;
        return size;
    }

    static cocos2d::CCRect operator+=(cocos2d::CCRect& rect, cocos2d::CCPoint const& add) {
        rect.origin += add;
        return rect;
    }

    static cocos2d::CCRect operator+=(cocos2d::CCRect& rect, cocos2d::CCSize const& add) {
        rect.size += add;
        return rect;
    }

    static cocos2d::CCRect operator+=(cocos2d::CCRect& rect, cocos2d::CCRect const& add) {
        rect.origin += add.origin;
        rect.size += add.size;
        return rect;
    }

    static cocos2d::CCPoint operator-=(cocos2d::CCPoint& pos, cocos2d::CCPoint const& add) {
        pos.x -= add.x;
        pos.y -= add.y;
        return pos;
    }

    static cocos2d::CCSize operator-=(cocos2d::CCSize& size, cocos2d::CCPoint const& add) {
        size.width -= add.x;
        size.height -= add.y;
        return size;
    }

    static cocos2d::CCSize operator-=(cocos2d::CCSize& size, cocos2d::CCSize const& add) {
        size.width -= add.width;
        size.height -= add.height;
        return size;
    }

    static cocos2d::CCRect operator-=(cocos2d::CCRect& rect, cocos2d::CCPoint const& add) {
        rect.origin -= add;
        return rect;
    }

    static cocos2d::CCRect operator-=(cocos2d::CCRect& rect, cocos2d::CCSize const& add) {
        rect.size -= add;
        return rect;
    }

    static cocos2d::CCRect operator-=(cocos2d::CCRect& rect, cocos2d::CCRect const& add) {
        rect.origin -= add.origin;
        rect.size -= add.size;
        return rect;
    }

    static cocos2d::CCSize operator-(cocos2d::CCSize const& size, float f) {
        return {size.width - f, size.height - f};
    }

    static cocos2d::CCSize operator-(cocos2d::CCSize const& size) {
        return {-size.width, -size.height};
    }

    static bool operator==(cocos2d::CCPoint const& p1, cocos2d::CCPoint const& p2) {
        return p1.x == p2.x && p1.y == p2.y;
    }

    static bool operator!=(cocos2d::CCPoint const& p1, cocos2d::CCPoint const& p2) {
        return p1.x != p2.x || p1.y != p2.y;
    }

    static bool operator==(cocos2d::CCSize const& s1, cocos2d::CCSize const& s2) {
        return s1.width == s2.width && s1.height == s2.height;
    }

    static bool operator!=(cocos2d::CCSize const& s1, cocos2d::CCSize const& s2) {
        return s1.width != s2.width || s1.height != s2.height;
    }

    static bool operator==(cocos2d::CCRect const& r1, cocos2d::CCRect const& r2) {
        return r1.origin == r2.origin && r1.size == r2.size;
    }

    static bool operator!=(cocos2d::CCRect const& r1, cocos2d::CCRect const& r2) {
        return r1.origin != r2.origin || r1.size != r2.size;
    }

    static bool operator==(cocos2d::ccColor4B const& c1, cocos2d::ccColor4B const& c2) {
        return c1.r == c2.r && c1.g == c2.g && c1.b == c2.b && c1.a == c2.a;
    }

    static bool operator!=(cocos2d::ccColor4B const& c1, cocos2d::ccColor4B const& c2) {
        return c1.r != c2.r || c1.g != c2.g || c1.b != c2.b || c1.a != c2.a;
    }

    static bool operator!=(cocos2d::ccColor3B const& c1, cocos2d::ccColor3B const& c2) {
        return c1.r != c2.r || c1.g != c2.g || c1.b != c2.b;
    }
}

// Ref & Bug
namespace geode {
    /**
     * A smart pointer to a managed CCObject-deriving class. Retains shared
     * ownership over the managed instance. Releases the object when the Ref
     * is destroyed, or assigned another object or nullptr.
     *
     * Use-cases include, for example, non-CCNode class members, or nodes that
     * are not always in the scene tree.
     *
     * @example class MyNode : public CCNode {
     * protected:
     *      // no need to manually call retain or
     *      // release on this array; Ref manages it
     *      // for you :3
     *      Ref<CCArray> m_list = CCArray::create();
     * };
     */
    template <class T>
    class Ref final {
        static_assert(
            std::is_base_of_v<cocos2d::CCObject, T>,
            "Ref can only be used with a CCObject-inheriting class!"
        );

        T* m_obj = nullptr;

    public:
        /**
         * Construct a Ref of an object. The object will be retained and
         * managed until Ref goes out of scope
         */
        Ref(T* obj) : m_obj(obj) {
            CC_SAFE_RETAIN(obj);
        }

        Ref(Ref<T> const& other) : Ref(other.data()) {}

        Ref(Ref<T>&& other) : m_obj(other.m_obj) {
            other.m_obj = nullptr;
        }

        /**
         * Construct an empty Ref (the managed object will be null)
         */
        Ref() = default;

        ~Ref() {
            CC_SAFE_RELEASE(m_obj);
        }

        /**
         * Swap the managed object with another object. The managed object
         * will be released, and the new object retained
         * @param other The new object to swap to
         */
        void swap(T* other) {
            CC_SAFE_RELEASE(m_obj);
            m_obj = other;
            CC_SAFE_RETAIN(other);
        }

        /**
         * Return the managed object
         * @returns The managed object
         */
        T* data() const {
            return m_obj;
        }

        operator T*() const {
            return m_obj;
        }

        T* operator*() const {
            return m_obj;
        }

        T* operator->() const {
            return m_obj;
        }

        T* operator=(T* obj) {
            this->swap(obj);
            return obj;
        }

        Ref<T>& operator=(Ref<T> const& other) {
            this->swap(other.data());
            return *this;
        }

        Ref<T>& operator=(Ref<T>&& other) {
            this->swap(other.data());
            return *this;
        }

        bool operator==(T* other) const {
            return m_obj == other;
        }

        bool operator==(Ref<T> const& other) const {
            return m_obj == other.m_obj;
        }

        bool operator!=(T* other) const {
            return m_obj != other;
        }

        bool operator!=(Ref<T> const& other) const {
            return m_obj != other.m_obj;
        }

        // for containers
        bool operator<(Ref<T> const& other) const {
            return m_obj < other.m_obj;
        }

        bool operator>(Ref<T> const& other) const {
            return m_obj > other.m_obj;
        }
    };

    template <class Filter>
    class EventListenerNode : public cocos2d::CCNode {
    protected:
        EventListener<Filter> m_listener;

        EventListenerNode(EventListener<Filter>&& listener)
          : m_listener(std::move(listener)) {}
    
    public:
        static EventListenerNode* create(EventListener<Filter> listener) {
            auto ret = new EventListenerNode(std::move(listener));
            if (ret && ret->init()) {
                ret->autorelease();
                return ret;
            }
            CC_SAFE_DELETE(ret);
            return nullptr;
        }

        static EventListenerNode* create(typename Filter::Callback callback) {
            auto ret = new EventListenerNode(EventListener<Filter>(callback));
            if (ret && ret->init()) {
                ret->autorelease();
                return ret;
            }
            CC_SAFE_DELETE(ret);
            return nullptr;
        }


        template <class C>
        static EventListenerNode* create(
            C* cls, typename EventListener<Filter>::template MemberFn<C> callback
        ) {
            // for some reason msvc won't let me just call EventListenerNode::create...
            // it claims no return value...
            // despite me writing return EventListenerNode::create()......
            auto ret = new EventListenerNode(EventListener<Filter>(cls, callback));
            if (ret && ret->init()) {
                ret->autorelease();
                return ret;
            }
            CC_SAFE_DELETE(ret);
            return nullptr;
        }
    };
}

// Cocos2d utils
namespace geode::cocos {
    /**
     * Get child at index. Checks bounds. A negative
     * index will get the child starting from the end
     * @returns Child at index cast to the given type,
     * or nullptr if index exceeds bounds
     */
    template <class T = cocos2d::CCNode>
    static T* getChild(cocos2d::CCNode* x, int i) {
        // start from end for negative index
        if (i < 0) i = x->getChildrenCount() + i;
        // check if backwards index is out of bounds
        if (i < 0) return nullptr;
        // check if forwards index is out of bounds
        if (static_cast<int>(x->getChildrenCount()) <= i) return nullptr;
        return static_cast<T*>(x->getChildren()->objectAtIndex(i));
    }

    /**
     * Get nth child that is a given type. Checks bounds.
     * @returns Child at index cast to the given type,
     * or nullptr if index exceeds bounds
     */
    template <class Type = cocos2d::CCNode>
    static Type* getChildOfType(cocos2d::CCNode* node, size_t index) {
        size_t indexCounter = 0;

        for (size_t i = 0; i < node->getChildrenCount(); ++i) {
            auto obj = cast::typeinfo_cast<Type*>(node->getChildren()->objectAtIndex(i));
            if (obj != nullptr) {
                if (indexCounter == index) {
                    return obj;
                }
                ++indexCounter;
            }
        }

        return nullptr;
    }

    /**
     * Return a node, or create a default one if it's
     * nullptr. Syntactic sugar function
     */
    template <class T, class... Args>
    static T* nodeOrDefault(T* node, Args... args) {
        return node ? node : T::create(args...);
    }

    /**
     * Get bounds for a set of nodes. Based on content
     * size
     * @param nodes Nodes to calculate coverage of
     * @returns Rectangle fitting all nodes. Origin
     * will be <= 0 and size will be >= 0
     */
    GEODE_DLL cocos2d::CCRect calculateNodeCoverage(std::vector<cocos2d::CCNode*> const& nodes);
    /**
     * Get bounds for a set of nodes. Based on content
     * size
     * @param nodes Nodes to calculate coverage of
     * @returns Rectangle fitting all nodes. Origin
     * will be <= 0 and size will be >= 0
     */
    GEODE_DLL cocos2d::CCRect calculateNodeCoverage(cocos2d::CCArray* nodes);
    /**
     * Get bounds for a set of nodes. Based on content
     * size
     * @param parent Parent whose children to calculate
     * coverage of
     * @returns Rectangle fitting all the parent's children.
     * Origin will be <= 0 and size will be >= 0
     */
    GEODE_DLL cocos2d::CCRect calculateChildCoverage(cocos2d::CCNode* parent);

    /**
     * Create a CCScene from a layer and switch to it with the default fade
     * transition
     * @param layer Layer to create a scene from
     * @returns Created scene (not the fade transition)
     */
    GEODE_DLL cocos2d::CCScene* switchToScene(cocos2d::CCLayer* layer);

    using CreateLayerFunc = std::function<cocos2d::CCLayer*()>;

    /**
     * Reload textures, overwriting the scene to return to after the loading
     * screen is finished
     * @param returnTo A function that returns a new layer. After loading is
     * finished, the game switches to the given layer instead of MenuLayer.
     * Leave nullptr to enable default behaviour
     */
    GEODE_DLL void reloadTextures(CreateLayerFunc returnTo = nullptr);

    /**
     * Rescale node to fit inside given size
     * @param node Node to rescale
     * @param size Size to fit inside
     * @param def Default size
     * @param min Minimum size
     */
    GEODE_DLL void limitNodeSize(cocos2d::CCNode* node, cocos2d::CCSize const& size, float def, float min);

    /**
     * Checks if a node is visible (recursively
     * checks parent visibility)
     * @param node Node to check if visible
     * @returns True if node is visibile. Does
     * not take into account if node is off-screen
     */
    GEODE_DLL bool nodeIsVisible(cocos2d::CCNode* node);

    /**
     * Gets a node by tag by traversing
     * children recursively
     *
     * @param node Parent node
     * @param tag Target tag
     * @return Child node with specified tag, or
     * null if there is none
     */
    GEODE_DLL cocos2d::CCNode* getChildByTagRecursive(cocos2d::CCNode* node, int tag);

    /**
     *  Get first node that conforms to the predicate
     *  by traversing children recursively
     *
     *  @param node Parent node
     *  @param predicate Predicate used to evaluate nodes
     * @return Child node if one is found, or null if
     * there is none
     */
    template <class Type = cocos2d::CCNode>
    Type* findFirstChildRecursive(cocos2d::CCNode* node, std::function<bool(Type*)> predicate) {
        if (cast::safe_cast<Type*>(node) && predicate(static_cast<Type*>(node)))
            return static_cast<Type*>(node);

        auto children = node->getChildren();
        if (!children) return nullptr;

        for (int i = 0; i < children->count(); ++i) {
            auto newParent = static_cast<cocos2d::CCNode*>(children->objectAtIndex(i));
            auto child = findFirstChildRecursive(newParent, predicate);
            if (child) return child;
        }

        return nullptr;
    }

    /**
     * Checks if a given file exists in CCFileUtils
     * search paths.
     * @param filename File to check
     * @returns True if file exists
     * @example if (fileExistsInSearchPaths("mySprite.png"_spr)) {
     *      CCSprite::create("mySprite.png"_spr);
     * } else {
     *      CCSprite::create("fallback.png");
     * }
     */
    GEODE_DLL bool fileExistsInSearchPaths(char const* filename);

    template <typename T>
    struct CCArrayIterator {
    public:
        CCArrayIterator(T* p) : m_ptr(p) {}

        T* m_ptr;

        auto& operator*() {
            return *m_ptr;
        }

        auto& operator*() const {
            return *m_ptr;
        }

        auto operator->() {
            return m_ptr;
        }

        auto operator->() const {
            return m_ptr;
        }

        auto& operator++() {
            ++m_ptr;
            return *this;
        }

        auto& operator--() {
            --m_ptr;
            return *this;
        }

        auto& operator+=(size_t val) {
            m_ptr += val;
            return *this;
        }

        auto& operator-=(size_t val) {
            m_ptr -= val;
            return *this;
        }

        auto operator+(size_t val) const {
            return CCArrayIterator<T>(m_ptr + val);
        }

        auto operator-(size_t val) const {
            return CCArrayIterator<T>(m_ptr - val);
        }

        auto operator-(CCArrayIterator<T> const& other) const {
            return m_ptr - other.m_ptr;
        }

        bool operator<(CCArrayIterator<T> const& other) const {
            return m_ptr < other.m_ptr;
        }

        bool operator>(CCArrayIterator<T> const& other) const {
            return m_ptr > other.m_ptr;
        }

        bool operator<=(CCArrayIterator<T> const& other) const {
            return m_ptr <= other.m_ptr;
        }

        bool operator>=(CCArrayIterator<T> const& other) const {
            return m_ptr >= other.m_ptr;
        }

        bool operator==(CCArrayIterator<T> const& other) const {
            return m_ptr == other.m_ptr;
        }

        bool operator!=(CCArrayIterator<T> const& other) const {
            return m_ptr != other.m_ptr;
        }
    };

    inline void ccDrawColor4B(cocos2d::ccColor4B const& color) {
        cocos2d::ccDrawColor4B(color.r, color.g, color.b, color.a);
    }

    inline cocos2d::ccColor4B invert4B(cocos2d::ccColor4B const& color) {
        return {
            static_cast<GLubyte>(255 - color.r),
            static_cast<GLubyte>(255 - color.g),
            static_cast<GLubyte>(255 - color.b),
            color.a};
    }

    inline cocos2d::ccColor3B invert3B(cocos2d::ccColor3B const& color) {
        return {
            static_cast<GLubyte>(255 - color.r),
            static_cast<GLubyte>(255 - color.g),
            static_cast<GLubyte>(255 - color.b)};
    }

    inline cocos2d::ccColor3B lighten3B(cocos2d::ccColor3B const& color, int amount) {
        return {
            static_cast<GLubyte>(utils::clamp(color.r + amount, 0, 255)),
            static_cast<GLubyte>(utils::clamp(color.g + amount, 0, 255)),
            static_cast<GLubyte>(utils::clamp(color.b + amount, 0, 255)),
        };
    }

    inline cocos2d::ccColor3B darken3B(cocos2d::ccColor3B const& color, int amount) {
        return lighten3B(color, -amount);
    }

    inline cocos2d::ccColor3B to3B(cocos2d::ccColor4B const& color) {
        return {color.r, color.g, color.b};
    }

    inline cocos2d::ccColor4B to4B(cocos2d::ccColor3B const& color, GLubyte alpha = 255) {
        return {color.r, color.g, color.b, alpha};
    }

    inline cocos2d::ccColor4F to4F(cocos2d::ccColor4B const& color) {
        return {color.r / 255.f, color.g / 255.f, color.b / 255.f, color.a / 255.f};
    }

    constexpr cocos2d::ccColor3B cc3x(int hexValue) {
        if (hexValue <= 0xf)
            return cocos2d::ccColor3B{
                static_cast<GLubyte>(hexValue * 17),
                static_cast<GLubyte>(hexValue * 17),
                static_cast<GLubyte>(hexValue * 17)};
        if (hexValue <= 0xff)
            return cocos2d::ccColor3B{
                static_cast<GLubyte>(hexValue),
                static_cast<GLubyte>(hexValue),
                static_cast<GLubyte>(hexValue)};
        if (hexValue <= 0xfff)
            return cocos2d::ccColor3B{
                static_cast<GLubyte>((hexValue >> 8 & 0xf) * 17),
                static_cast<GLubyte>((hexValue >> 4 & 0xf) * 17),
                static_cast<GLubyte>((hexValue >> 0 & 0xf) * 17)};
        else
            return cocos2d::ccColor3B{
                static_cast<GLubyte>(hexValue >> 16 & 0xff),
                static_cast<GLubyte>(hexValue >> 8 & 0xff),
                static_cast<GLubyte>(hexValue >> 0 & 0xff)};
    }

    GEODE_DLL Result<cocos2d::ccColor3B> cc3bFromHexString(std::string const& hexValue);
    GEODE_DLL Result<cocos2d::ccColor4B> cc4bFromHexString(std::string const& hexValue);
    GEODE_DLL std::string cc3bToHexString(cocos2d::ccColor3B const& color);
    GEODE_DLL std::string cc4bToHexString(cocos2d::ccColor4B const& color);

    template <typename T, typename = std::enable_if_t<std::is_pointer_v<T>>>
    static cocos2d::CCArray* vectorToCCArray(std::vector<T> const& vec) {
        auto res = cocos2d::CCArray::createWithCapacity(vec.size());
        for (auto const& item : vec)
            res->addObject(item);
        return res;
    }

    template <typename T, typename C, typename = std::enable_if_t<std::is_pointer_v<C>>>
    static cocos2d::CCArray* vectorToCCArray(std::vector<T> const& vec, std::function<C(T)> convFunc) {
        auto res = cocos2d::CCArray::createWithCapacity(vec.size());
        for (auto const& item : vec)
            res->addObject(convFunc(item));
        return res;
    }

    template <typename T, typename = std::enable_if_t<std::is_pointer_v<T>>>
    std::vector<T> ccArrayToVector(cocos2d::CCArray* arr) {
        return std::vector<T>(
            reinterpret_cast<T*>(arr->data->arr), reinterpret_cast<T*>(arr->data->arr) + arr->data->num
        );
    }

    template <
        typename K, typename V,
        typename = std::enable_if_t<std::is_same_v<K, std::string> || std::is_same_v<K, intptr_t>>>
    static cocos2d::CCDictionary* mapToCCDict(std::map<K, V> const& map) {
        auto res = cocos2d::CCDictionary::create();
        for (auto const& [key, value] : map)
            res->setObject(value, key);
        return res;
    }

    template <
        typename K, typename V, typename C,
        typename = std::enable_if_t<std::is_same_v<C, std::string> || std::is_same_v<C, intptr_t>>>
    static cocos2d::CCDictionary* mapToCCDict(std::map<K, V> const& map, std::function<C(K)> convFunc) {
        auto res = cocos2d::CCDictionary::create();
        for (auto const& [key, value] : map)
            res->setObject(value, convFunc(key));
        return res;
    }

    //   template<typename K, typename V,
    // typename = std::enable_if_t<std::is_same_v<K, std::string> || std::is_same_v<K, intptr_t>> >
    //   static std::map<K, V> ccDictToMap(cocos2d::CCDictionary* dict) {
    //       auto res = std::map<K, V>();
    //       cocos2d::CCDictElement* element = nullptr;
    //       CCDICT_FOREACH(dict, element) {
    //       	if constexpr (std::is_same_v<K, std::string>)
    //       		res[element->getStrKey()] = element->getObject();
    //       	if constexpr (std::is_same_v<K, intptr_t>)
    //       		res[element->getIntKey()] = element->getObject();
    //       }
    //       return res;
    //   }
}

// std specializations
namespace std {
    // enables using Ref as the key in unordered_map etc.
    template <class T>
    struct hash<geode::Ref<T>> {
        size_t operator()(geode::Ref<T> const& ref) const {
            return std::hash<T*>()(ref.data());
        }
    };

    template <typename T>
    struct iterator_traits<geode::cocos::CCArrayIterator<T>> {
        using difference_type = ptrdiff_t;
        using value_type = T;
        using pointer = T*;
        using reference = T&;
        using iterator_category =
            std::random_access_iterator_tag; // its random access but im too lazy to implement it
    };
}

// more utils
namespace geode::cocos {
    struct GEODE_DLL CCArrayInserter {
    public:
        CCArrayInserter(cocos2d::CCArray* p) : m_array(p) {}

        cocos2d::CCArray* m_array;

        auto& operator=(cocos2d::CCObject* value) {
            m_array->addObject(value);
            return *this;
        }

        auto& operator*() {
            return *this;
        }

        auto& operator++() {
            return *this;
        }
    };

    template <typename _Type>
    class CCArrayExt {
    protected:
        Ref<cocos2d::CCArray> m_arr;
        using T = std::remove_pointer_t<_Type>;

    public:
        CCArrayExt() : m_arr(cocos2d::CCArray::create()) {}

        CCArrayExt(cocos2d::CCArray* arr) : m_arr(arr) {}

        CCArrayExt(CCArrayExt const& a) : m_arr(a.m_arr) {}

        CCArrayExt(CCArrayExt&& a) : m_arr(a.m_arr) {
            a.m_arr = nullptr;
        }

        ~CCArrayExt() {}

        auto begin() {
            if (!m_arr) {
                return CCArrayIterator<T*>(nullptr);
            }
            return CCArrayIterator<T*>(reinterpret_cast<T**>(m_arr->data->arr));
        }

        auto end() {
            if (!m_arr) {
                return CCArrayIterator<T*>(nullptr);
            }
            return CCArrayIterator<T*>(reinterpret_cast<T**>(m_arr->data->arr) + m_arr->count());
        }

        size_t size() const {
            return m_arr ? m_arr->count() : 0;
        }

        T operator[](size_t index) {
            return static_cast<T*>(m_arr->objectAtIndex(index));
        }

        void push_back(T* item) {
            m_arr->addObject(item);
        }

        T* pop_back() {
            T ret = m_arr->lastObject();
            m_arr->removeLastObject();
            return ret;
        }

        cocos2d::CCArray* inner() {
            return m_arr;
        }
    };

    template <typename K, typename T>
    struct CCDictIterator {
    public:
        CCDictIterator(cocos2d::CCDictElement* p) : m_ptr(p) {}

        cocos2d::CCDictElement* m_ptr;

        std::pair<K, T> operator*() {
            if constexpr (std::is_same<K, std::string>::value) {
                return {m_ptr->getStrKey(), static_cast<T>(m_ptr->getObject())};
            }
            else {
                return {m_ptr->getIntKey(), static_cast<T>(m_ptr->getObject())};
            }
        }

        auto& operator++() {
            m_ptr = static_cast<decltype(m_ptr)>(m_ptr->hh.next);
            return *this;
        }

        friend bool operator==(CCDictIterator<K, T> const& a, CCDictIterator<K, T> const& b) {
            return a.m_ptr == b.m_ptr;
        };

        friend bool operator!=(CCDictIterator<K, T> const& a, CCDictIterator<K, T> const& b) {
            return a.m_ptr != b.m_ptr;
        };

        bool operator!=(int b) {
            return m_ptr != nullptr;
        }
    };

    template <typename K, typename T>
    struct CCDictEntry {
        K m_key;
        cocos2d::CCDictionary* m_dict;

        CCDictEntry(K key, cocos2d::CCDictionary* dict) : m_key(key), m_dict(dict) {}

        T operator->() {
            return static_cast<T>(m_dict->objectForKey(m_key));
        }

        operator T() {
            return static_cast<T>(m_dict->objectForKey(m_key));
        }

        CCDictEntry& operator=(T f) {
            m_dict->setObject(f, m_key);
            return *this;
        }
    };

    template <typename K, typename T>
    struct CCDictionaryExt {
    protected:
        cocos2d::CCDictionary* m_dict;

    public:
        CCDictionaryExt() : m_dict(cocos2d::CCDictionary::create()) {
            m_dict->retain();
        }

        CCDictionaryExt(cocos2d::CCDictionary* dict) : m_dict(dict) {
            m_dict->retain();
        }

        CCDictionaryExt(CCDictionaryExt const& d) : m_dict(d.m_dict) {
            m_dict->retain();
        }

        CCDictionaryExt(CCDictionaryExt&& d) : m_dict(d.m_dict) {
            d.m_dict = nullptr;
        }

        ~CCDictionaryExt() {
            if (m_dict) m_dict->release();
        }

        CCDictionaryExt const& operator=(cocos2d::CCDictionary* d) {
            m_dict->release();
            m_dict = d;
            m_dict->retain();
        }

        auto begin() {
            return CCDictIterator<K, T*>(m_dict->m_pElements);
        }

        // do not use this
        auto end() {
            return nullptr;
        }

        size_t size() {
            return m_dict->count();
        }

        auto operator[](K key) {
            auto ret = static_cast<T*>(m_dict->objectForKey(key));
            if (!ret) m_dict->setObject(cocos2d::CCNode::create(), key);

            return CCDictEntry<K, T*>(key, m_dict);
        }

        size_t count(K key) {
            return m_dict->allKeys(key)->count();
        }
    };
}