/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2008-2010 Ricardo Quesada

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 <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(NULL, NULL);
}

Menu * Menu::create(MenuItem* item, ...)
{
    va_list args;
    va_start(args,item);
    
    Menu *pRet = Menu::createWithItems(item, args);
    
    va_end(args);
    
    return pRet;
}

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, NULL);
}

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 = NULL;
        _state = Menu::State::WAITING;
        
        // enable cascade color and opacity on menus
        setCascadeColorEnabled(true);
        setCascadeOpacityEnabled(true);
        
        
        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);
        
        return true;
    }
    return false;
}

/*
* 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) != NULL, "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 = NULL;
        }
        
        _state = Menu::State::WAITING;
    }

    Layer::onExit();
}

void Menu::removeChild(Node* child, bool cleanup)
{
    MenuItem *pMenuItem = dynamic_cast<MenuItem*>(child);
    CCASSERT(pMenuItem != NULL, "Menu only supports MenuItem objects as children");
    
    if (_selectedItem == pMenuItem)
    {
        _selectedItem = NULL;
    }
    
    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 != NULL; 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;
    
    _children.forEach([&](Node* child){
        if (child)
        {
            height += child->getContentSize().height * child->getScaleY() + padding;
        }
    });

    float y = height / 2.0f;
    
    _children.forEach([&](Node* child){
        if (child)
        {
            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;
    _children.forEach([&](Node* child){
        if (child)
        {
            width += child->getContentSize().width * child->getScaleX() + padding;
        }
    });

    float x = -width / 2.0f;
    
    _children.forEach([&](Node* child){
        if (child)
        {
            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;
    int row = 0;
    int rowHeight = 0;
    int columnsOccupied = 0;
    int rowColumns = 0;

    _children.forEach([&](Node* child){
        if (child)
        {
            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);

    _children.forEach([&](Node* child){
        if (child)
        {
            if (child)
            {
                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;
    int column = 0;
    int columnWidth = 0;
    int rowsOccupied = 0;
    int columnRows;

    _children.forEach([&](Node* child){
        if (child)
        {
            // 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;

    _children.forEach([&](Node* child){
        if (child)
        {
            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 NULL;
}

NS_CC_END