/****************************************************************************

Copyright (c) 2008-2010 Ricardo Quesada

Copyright (c) 2010-2012 cocos2d-x.org

Copyright (c) 2013-2014 Chukong Technologies Inc.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in

all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

THE SOFTWARE.

****************************************************************************/

#include "CCMenu.h"

#include "CCDirector.h"

#include "CCApplication.h"

#include "CCTouch.h"

#include "CCStdC.h"

#include "CCInteger.h"

#include "CCEventListenerTouch.h"

#include "CCString.h"

#include <vector>

#include <stdarg.h>

using namespace std;

NS_CC_BEGIN

enum 

{

    kDefaultPadding =  5,

};

//

//CCMenu

//

Menu::~Menu()

{

    CCLOGINFO("In the destructor of Menu. %p", this);

}

Menu* Menu::create()

{

    return Menu::create(nullptr, nullptr);

}

Menu * Menu::create(MenuItem* item, ...)

{

    va_list args;

    va_start(args,item);

    Menu *ret = Menu::createWithItems(item, args);

    va_end(args);

    return ret;

}

Menu* Menu::createWithArray(const Vector<MenuItem*>& arrayOfItems)

{

    auto ret = new Menu();

    if (ret && ret->initWithArray(arrayOfItems))

    {

        ret->autorelease();

    }

    else

    {

        CC_SAFE_DELETE(ret);

    }

    return ret;

}

Menu* Menu::createWithItems(MenuItem* item, va_list args)

{

    Vector<MenuItem*> items;

    if( item )

    {

        items.pushBack(item);

        MenuItem *i = va_arg(args, MenuItem*);

        while(i)

        {

            items.pushBack(i);

            i = va_arg(args, MenuItem*);

        }

    }

    return Menu::createWithArray(items);

}

Menu* Menu::createWithItem(MenuItem* item)

{

    return Menu::create(item, nullptr);

}

bool Menu::init()

{

    return initWithArray(Vector<MenuItem*>());

}

bool Menu::initWithArray(const Vector<MenuItem*>& arrayOfItems)

{

    if (Layer::init())

    {

        _enabled = true;

        // menu in the center of the screen

        Size s = Director::getInstance()->getWinSize();

        this->ignoreAnchorPointForPosition(true);

        setAnchorPoint(Point(0.5f, 0.5f));

        this->setContentSize(s);

        setPosition(Point(s.width/2, s.height/2));

        int z=0;

        for (auto& item : arrayOfItems)

        {

            this->addChild(item, z);

            z++;

        }

        _selectedItem = nullptr;

        _state = Menu::State::WAITING;

        // enable cascade color and opacity on menus

        setCascadeColorEnabled(true);

        setCascadeOpacityEnabled(true);

        //adds even listener for Menu

        addTouchEvent();

        return true;

    }

    return false;

}

/*

 * adds even listener for Menu 

 */

void Menu::addTouchEvent()

{

  auto touchListener = EventListenerTouchOneByOne::create();

  touchListener->setSwallowTouches(true);

  touchListener->onTouchBegan = CC_CALLBACK_2(Menu::onTouchBegan, this);

  touchListener->onTouchMoved = CC_CALLBACK_2(Menu::onTouchMoved, this);

  touchListener->onTouchEnded = CC_CALLBACK_2(Menu::onTouchEnded, this);

  touchListener->onTouchCancelled = CC_CALLBACK_2(Menu::onTouchCancelled, this);

  _eventDispatcher->addEventListenerWithSceneGraphPriority(touchListener, this);

}

/*

* override add:

*/

void Menu::addChild(Node * child)

{

    Layer::addChild(child);

}

void Menu::addChild(Node * child, int zOrder)

{

    Layer::addChild(child, zOrder);

}

void Menu::addChild(Node * child, int zOrder, int tag)

{

    CCASSERT( dynamic_cast<MenuItem*>(child) != nullptr, "Menu only supports MenuItem objects as children");

    Layer::addChild(child, zOrder, tag);

}

void Menu::onEnter()

{

    Layer::onEnter();

}

void Menu::onExit()

{

    if (_state == Menu::State::TRACKING_TOUCH)

    {

        if (_selectedItem)

        {

            _selectedItem->unselected();

            _selectedItem = nullptr;

        }

        _state = Menu::State::WAITING;

    }

    Layer::onExit();

}

void Menu::removeChild(Node* child, bool cleanup)

{

    MenuItem *menuItem = dynamic_cast<MenuItem*>(child);

    CCASSERT(menuItem != nullptr, "Menu only supports MenuItem objects as children");

    if (_selectedItem == menuItem)

    {

        _selectedItem = nullptr;

    }

    Node::removeChild(child, cleanup);

}

//Menu - Events

bool Menu::onTouchBegan(Touch* touch, Event* event)

{

    if (_state != Menu::State::WAITING || ! _visible || !_enabled)

    {

        return false;

    }

    for (Node *c = this->_parent; c != nullptr; c = c->getParent())

    {

        if (c->isVisible() == false)

        {

            return false;

        }

    }

    _selectedItem = this->getItemForTouch(touch);

    if (_selectedItem)

    {

        _state = Menu::State::TRACKING_TOUCH;

        _selectedItem->selected();

        return true;

    }

    return false;

}

void Menu::onTouchEnded(Touch* touch, Event* event)

{

    CCASSERT(_state == Menu::State::TRACKING_TOUCH, "[Menu ccTouchEnded] -- invalid state");

    this->retain();

    if (_selectedItem)

    {

        _selectedItem->unselected();

        _selectedItem->activate();

    }

    _state = Menu::State::WAITING;

    this->release();

}

void Menu::onTouchCancelled(Touch* touch, Event* event)

{

    CCASSERT(_state == Menu::State::TRACKING_TOUCH, "[Menu ccTouchCancelled] -- invalid state");

    this->retain();

    if (_selectedItem)

    {

        _selectedItem->unselected();

    }

    _state = Menu::State::WAITING;

    this->release();

}

void Menu::onTouchMoved(Touch* touch, Event* event)

{

    CCASSERT(_state == Menu::State::TRACKING_TOUCH, "[Menu ccTouchMoved] -- invalid state");

    MenuItem *currentItem = this->getItemForTouch(touch);

    if (currentItem != _selectedItem)

    {

        if (_selectedItem)

        {

            _selectedItem->unselected();

        }

        _selectedItem = currentItem;

        if (_selectedItem)

        {

            _selectedItem->selected();

        }

    }

}

//Menu - Alignment

void Menu::alignItemsVertically()

{

    this->alignItemsVerticallyWithPadding(kDefaultPadding);

}

void Menu::alignItemsVerticallyWithPadding(float padding)

{

    float height = -padding;

    for(const auto &child : _children)

        height += child->getContentSize().height * child->getScaleY() + padding;

    float y = height / 2.0f;

    for(const auto &child : _children) {

        child->setPosition(Point(0, y - child->getContentSize().height * child->getScaleY() / 2.0f));

        y -= child->getContentSize().height * child->getScaleY() + padding;

    }

}

void Menu::alignItemsHorizontally(void)

{

    this->alignItemsHorizontallyWithPadding(kDefaultPadding);

}

void Menu::alignItemsHorizontallyWithPadding(float padding)

{

    float width = -padding;

    for(const auto &child : _children)

        width += child->getContentSize().width * child->getScaleX() + padding;

    float x = -width / 2.0f;

    for(const auto &child : _children) {

        child->setPosition(Point(x + child->getContentSize().width * child->getScaleX() / 2.0f, 0));

        x += child->getContentSize().width * child->getScaleX() + padding;

    }

}

void Menu::alignItemsInColumns(int columns, ...)

{

    va_list args;

    va_start(args, columns);

    this->alignItemsInColumns(columns, args);

    va_end(args);

}

void Menu::alignItemsInColumns(int columns, va_list args)

{

    CCASSERT(columns >= 0, "Columns must be >= 0");

    ValueVector rows;

    while (columns)

    {

        rows.push_back(Value(columns));

        columns = va_arg(args, int);

    }

    alignItemsInColumnsWithArray(rows);

}

void Menu::alignItemsInColumnsWithArray(const ValueVector& rows)

{

    int height = -5;

    size_t row = 0;

    int rowHeight = 0;

    int columnsOccupied = 0;

    int rowColumns = 0;

    for(const auto &child : _children) {

        CCASSERT(row < rows.size(), "");

        rowColumns = rows[row].asInt();

        // can not have zero columns on a row

        CCASSERT(rowColumns, "");

        float tmp = child->getContentSize().height;

        rowHeight = (unsigned int)((rowHeight >= tmp || isnan(tmp)) ? rowHeight : tmp);

        ++columnsOccupied;

        if (columnsOccupied >= rowColumns)

        {

            height += rowHeight + 5;

            columnsOccupied = 0;

            rowHeight = 0;

            ++row;

        }

    }

    // check if too many rows/columns for available menu items

    CCASSERT(! columnsOccupied, "");

    Size winSize = Director::getInstance()->getWinSize();

    row = 0;

    rowHeight = 0;

    rowColumns = 0;

    float w = 0.0;

    float x = 0.0;

    float y = (float)(height / 2);

    for(const auto &child : _children) {

        if (rowColumns == 0)

        {

            rowColumns = rows[row].asInt();

            w = winSize.width / (1 + rowColumns);

            x = w;

        }

        float tmp = child->getContentSize().height;

        rowHeight = (unsigned int)((rowHeight >= tmp || isnan(tmp)) ? rowHeight : tmp);

        child->setPosition(Point(x - winSize.width / 2,

                               y - child->getContentSize().height / 2));

        x += w;

        ++columnsOccupied;

        if (columnsOccupied >= rowColumns)

        {

            y -= rowHeight + 5;

            columnsOccupied = 0;

            rowColumns = 0;

            rowHeight = 0;

            ++row;

        }

    }

}

void Menu::alignItemsInRows(int rows, ...)

{

    va_list args;

    va_start(args, rows);

    this->alignItemsInRows(rows, args);

    va_end(args);

}

void Menu::alignItemsInRows(int rows, va_list args)

{

    ValueVector array;

    while (rows)

    {

        array.push_back(Value(rows));

        rows = va_arg(args, int);

    }

    alignItemsInRowsWithArray(array);

}

void Menu::alignItemsInRowsWithArray(const ValueVector& columns)

{

    vector<int> columnWidths;

    vector<int> columnHeights;

    int width = -10;

    int columnHeight = -5;

    size_t column = 0;

    int columnWidth = 0;

    int rowsOccupied = 0;

    int columnRows;

    for(const auto &child : _children) {

        // check if too many menu items for the amount of rows/columns

        CCASSERT(column < columns.size(), "");

        columnRows = columns[column].asInt();

        // can't have zero rows on a column

        CCASSERT(columnRows, "");

        // columnWidth = fmaxf(columnWidth, [item contentSize].width);

        float tmp = child->getContentSize().width;

        columnWidth = (unsigned int)((columnWidth >= tmp || isnan(tmp)) ? columnWidth : tmp);

        columnHeight += (int)(child->getContentSize().height + 5);

        ++rowsOccupied;

        if (rowsOccupied >= columnRows)

        {

            columnWidths.push_back(columnWidth);

            columnHeights.push_back(columnHeight);

            width += columnWidth + 10;

            rowsOccupied = 0;

            columnWidth = 0;

            columnHeight = -5;

            ++column;

        }

    }

    // check if too many rows/columns for available menu items.

    CCASSERT(! rowsOccupied, "");

    Size winSize = Director::getInstance()->getWinSize();

    column = 0;

    columnWidth = 0;

    columnRows = 0;

    float x = (float)(-width / 2);

    float y = 0.0;

    for(const auto &child : _children) {

        if (columnRows == 0)

        {

            columnRows = columns[column].asInt();

            y = (float) columnHeights[column];

        }

        // columnWidth = fmaxf(columnWidth, [item contentSize].width);

        float tmp = child->getContentSize().width;

        columnWidth = (unsigned int)((columnWidth >= tmp || isnan(tmp)) ? columnWidth : tmp);

        child->setPosition(Point(x + columnWidths[column] / 2,

                               y - winSize.height / 2));

        y -= child->getContentSize().height + 10;

        ++rowsOccupied;

        if (rowsOccupied >= columnRows)

        {

            x += columnWidth + 5;

            rowsOccupied = 0;

            columnRows = 0;

            columnWidth = 0;

            ++column;

        }

    }

}

MenuItem* Menu::getItemForTouch(Touch *touch)

{

    Point touchLocation = touch->getLocation();

    if (!_children.empty())

    {

        for (auto iter = _children.crbegin(); iter != _children.crend(); ++iter)

        {

            MenuItem* child = dynamic_cast<MenuItem*>(*iter);

            if (child && child->isVisible() && child->isEnabled())

            {

                Point local = child->convertToNodeSpace(touchLocation);

                Rect r = child->rect();

                r.origin = Point::ZERO;

                if (r.containsPoint(local))

                {

                    return child;

                }

            }

        }

    }

    return nullptr;

}

std::string Menu::getDescription() const

{

    return StringUtils::format("<Menu | Tag = %d>", _tag);

}

NS_CC_END