/*
 * Copyright (c) 2023 Fancy Code.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, softwareZhoufuwuqimima123
 *
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef GUI_ENGINE_H
#define GUI_ENGINE_H
#include "StatusCode.h"
#include <memory>


enum class  i_lv_event_code_t{
    I_LV_EVENT_ALL = 0,

    I_LV_EVENT_CLICKED,             /**< Called on release if not scrolled (regardless to long press)*/
};

enum class i_lv_align_t{
    I_LV_ALIGN_DEFAULT = 0,
    I_LV_ALIGN_TOP_LEFT,
    I_LV_ALIGN_TOP_MID,
    I_LV_ALIGN_TOP_RIGHT,
    I_LV_ALIGN_BOTTOM_LEFT,
    I_LV_ALIGN_BOTTOM_MID,
    I_LV_ALIGN_BOTTOM_RIGHT,
    I_LV_ALIGN_LEFT_MID,
    I_LV_ALIGN_RIGHT_MID,
    I_LV_ALIGN_CENTER,

    I_LV_ALIGN_OUT_TOP_LEFT,
    I_LV_ALIGN_OUT_TOP_MID,
    I_LV_ALIGN_OUT_TOP_RIGHT,
    I_LV_ALIGN_OUT_BOTTOM_LEFT,
    I_LV_ALIGN_OUT_BOTTOM_MID,
    I_LV_ALIGN_OUT_BOTTOM_RIGHT,
    I_LV_ALIGN_OUT_LEFT_TOP,
    I_LV_ALIGN_OUT_LEFT_MID,
    I_LV_ALIGN_OUT_LEFT_BOTTOM,
    I_LV_ALIGN_OUT_RIGHT_TOP,
    I_LV_ALIGN_OUT_RIGHT_MID,
    I_LV_ALIGN_OUT_RIGHT_BOTTOM,
};

typedef void (*i_lv_event_cb_t)(i_lv_event_code_t e, void * userData);

class VWidget
{
public:
    VWidget() = default;
    virtual ~VWidget() {}
    virtual void ImageSetSrc(const void *src) {}
    virtual void SetSize(const int16_t width, const int16_t height) {}
    virtual void SetColor(uint32_t color) {}
    virtual void Load(void) {}
    virtual void SetText(const char *text) {}
    virtual void AlignTo(std::shared_ptr<VWidget> base, i_lv_align_t align, int16_t posX, int16_t posY) {}
    virtual void SetPos(int16_t posX, int16_t posY) {}
    virtual void Center(void) {}
    virtual void SetEventCb(i_lv_event_cb_t eventCb) {}
    virtual void EventSend(i_lv_event_code_t e, void * userData) {}
// lv_res_t lv_event_send(lv_obj_t * obj, lv_event_code_t event_code, void * param)
    virtual void Delete(void) {}

/**
 * @brief Set transparency
 * @param opaValue 0~255
 *      0:  transparency
 *    255:opacification
 *  10%= 25; 20%= 51; 30%= 76; 40%= 102; 50%= 127; 60%= 153; 70%= 178; 80%= 204; 90%= 229; 100%= 255;
 */
    virtual void SetOpa(const uint8_t opaValue = 0) {}  
};


class VGuiEngine
{
public:
    VGuiEngine() = default;
    virtual ~VGuiEngine() = default;
    /**
     * @brief Get the Instance object
     * Return reference for runing faster. Usage : VGuiEngine::GetInstance()->Init();
     * Don't use VGuiEngine like this:
     * std::shared_ptr<VGuiEngine> &log = VGuiEngine::GetInstance();
     * or std::shared_ptr<VGuiEngine> log = VGuiEngine::GetInstance();
     * @param impl
     * @return std::shared_ptr<VGuiEngine>&
     */
    static std::shared_ptr<VGuiEngine> &GetInstance(std::shared_ptr<VGuiEngine> *impl = nullptr)
    {
        static auto instance = std::make_shared<VGuiEngine>();
        if (impl)
        {
            /**
             * @brief
             * The non-thread-safe changing is only for gtest.
             */
            instance = *impl;
        }
        return instance;
    }
    /**
     * @brief
     *
     * @param width width of screen
     * @param height height of screen
     * @param appInit for app to init the first window
     */
    virtual bool Init(const unsigned int width, const unsigned int height, void (*appInit)()) { return false; }
    virtual void UnInit() {}
    virtual const int16_t GetScreenWidth(void) { return 1;}
    virtual const int16_t GetScreenHeight(void) { return 1;}
    virtual StatusCode CreateFrameParObject(int16_t widht = 100, int16_t height = 100, int16_t posX = 0, int16_t posY = 0) { return CreateStatusCode(STATUS_CODE_OK); } // 这个界面不应该放出来, 在应用层初始化的时候使用
    virtual std::shared_ptr<VWidget> GetFrameParObject(void) { return std::make_shared<VWidget>(); }
    virtual StatusCode SetNowNode(std::shared_ptr<VWidget>) { return CreateStatusCode(STATUS_CODE_OK); } // 这个函数不应该放出来, 在切换界面的时候使用
    virtual std::shared_ptr<VWidget> GetNowNode(void) { return nullptr; }
    virtual std::shared_ptr<VWidget> NewWidget(void) { return std::make_shared<VWidget>(); }
    virtual std::shared_ptr<VWidget> NewPage(void) { return std::make_shared<VWidget>(); }
    virtual std::shared_ptr<VWidget> NewImage(void) { return std::make_shared<VWidget>(); }
    virtual std::shared_ptr<VWidget> NewButton(void) { return std::make_shared<VWidget>(); }
    
};


bool CreateGuiEngineImpl();

#endif