/****************************************************************************
 Copyright (c) 2013-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

 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 "ui/UILayoutManager.h"
#include "ui/UILayout.h"

NS_CC_BEGIN

namespace ui
{

LinearHorizontalLayoutManager* LinearHorizontalLayoutManager::create()
{
    LinearHorizontalLayoutManager* ret = new LinearHorizontalLayoutManager();
    ret->autorelease();
    return ret;
}

void LinearHorizontalLayoutManager::doLayout(LayoutProtocol* layout)
{
    Vec2 layoutSize         = layout->getLayoutContentSize();
    Vector<Node*> container = layout->getLayoutElements();
    float leftBoundary      = 0.0f;
    for (auto& subWidget : container)
    {
        Widget* child = dynamic_cast<Widget*>(subWidget);
        if (child)
        {
            LinearLayoutParameter* layoutParameter = dynamic_cast<LinearLayoutParameter*>(child->getLayoutParameter());
            if (layoutParameter)
            {
                LinearLayoutParameter::LinearGravity childGravity = layoutParameter->getGravity();
                Vec2 ap                                           = child->getAnchorPoint();
                Vec2 cs                                           = child->getBoundingBox().size;
                float finalPosX                                   = leftBoundary + (ap.x * cs.width);
                float finalPosY                                   = layoutSize.height - (1.0f - ap.y) * cs.height;
                switch (childGravity)
                {
                case LinearLayoutParameter::LinearGravity::NONE:
                case LinearLayoutParameter::LinearGravity::TOP:
                    break;
                case LinearLayoutParameter::LinearGravity::BOTTOM:
                    finalPosY = ap.y * cs.height;
                    break;
                case LinearLayoutParameter::LinearGravity::CENTER_VERTICAL:
                    finalPosY = layoutSize.height / 2.0f - cs.height * (0.5f - ap.y);
                    break;
                default:
                    break;
                }
                Margin mg = layoutParameter->getMargin();
                finalPosX += mg.left;
                finalPosY -= mg.top;
                child->setPosition(Vec2(finalPosX, finalPosY));
                leftBoundary = child->getRightBoundary() + mg.right;
            }
        }
    }
}

// LinearVerticalLayoutManager
LinearVerticalLayoutManager* LinearVerticalLayoutManager::create()
{
    LinearVerticalLayoutManager* ret = new LinearVerticalLayoutManager();
    ret->autorelease();
    return ret;
}

void LinearVerticalLayoutManager::doLayout(LayoutProtocol* layout)
{
    Vec2 layoutSize         = layout->getLayoutContentSize();
    Vector<Node*> container = layout->getLayoutElements();
    float topBoundary       = layoutSize.height;

    for (auto& subWidget : container)
    {
        LayoutParameterProtocol* child = dynamic_cast<LayoutParameterProtocol*>(subWidget);
        if (child)
        {
            LinearLayoutParameter* layoutParameter = dynamic_cast<LinearLayoutParameter*>(child->getLayoutParameter());

            if (layoutParameter)
            {
                LinearLayoutParameter::LinearGravity childGravity = layoutParameter->getGravity();
                Vec2 ap                                           = subWidget->getAnchorPoint();
                Vec2 cs                                           = subWidget->getBoundingBox().size;
                float finalPosX                                   = ap.x * cs.width;
                float finalPosY                                   = topBoundary - ((1.0f - ap.y) * cs.height);
                switch (childGravity)
                {
                case LinearLayoutParameter::LinearGravity::NONE:
                case LinearLayoutParameter::LinearGravity::LEFT:
                    break;
                case LinearLayoutParameter::LinearGravity::RIGHT:
                    finalPosX = layoutSize.width - ((1.0f - ap.x) * cs.width);
                    break;
                case LinearLayoutParameter::LinearGravity::CENTER_HORIZONTAL:
                    finalPosX = layoutSize.width / 2.0f - cs.width * (0.5f - ap.x);
                    break;
                default:
                    break;
                }
                Margin mg = layoutParameter->getMargin();
                finalPosX += mg.left;
                finalPosY -= mg.top;
                subWidget->setPosition(finalPosX, finalPosY);
                topBoundary = subWidget->getPosition().y -
                              subWidget->getAnchorPoint().y * subWidget->getBoundingBox().size.height - mg.bottom;
            }
        }
    }
}

// LinearCenterVerticalLayoutManager
LinearCenterVerticalLayoutManager* LinearCenterVerticalLayoutManager::create()
{
    auto* ret = new LinearCenterVerticalLayoutManager();
    ret->autorelease();
    return ret;
}

void LinearCenterVerticalLayoutManager::doLayout(LayoutProtocol* layout)
{
    const auto layoutSize = layout->getLayoutContentSize();
    auto&& container      = layout->getLayoutElements();
    auto topBoundary      = layoutSize.height;

    auto totalHeight = 0.f;
    // need to get total sub-widget height
    for (auto&& subWidget : container)
    {
        auto* child = dynamic_cast<LayoutParameterProtocol*>(subWidget);
        if (child)
        {
            auto* layoutParameter = dynamic_cast<LinearLayoutParameter*>(child->getLayoutParameter());
            if (layoutParameter)
            {
                auto&& mg = layoutParameter->getMargin();
                totalHeight += subWidget->getBoundingBox().size.height + mg.top + mg.bottom;
            }
        }
    }

    topBoundary = topBoundary - (topBoundary - totalHeight) / 2.f;

    for (auto&& subWidget : container)
    {
        auto* child = dynamic_cast<LayoutParameterProtocol*>(subWidget);
        if (child)
        {
            auto* layoutParameter = dynamic_cast<LinearLayoutParameter*>(child->getLayoutParameter());

            if (layoutParameter)
            {
                const auto childGravity = layoutParameter->getGravity();
                const auto ap           = subWidget->getAnchorPoint();
                const auto cs           = subWidget->getBoundingBox().size;
                auto finalPosX          = ap.x * cs.width;
                auto finalPosY          = topBoundary - ((1.0f - ap.y) * cs.height);
                switch (childGravity)
                {
                case LinearLayoutParameter::LinearGravity::NONE:
                case LinearLayoutParameter::LinearGravity::LEFT:
                    break;
                case LinearLayoutParameter::LinearGravity::RIGHT:
                    finalPosX = layoutSize.width - ((1.0f - ap.x) * cs.width);
                    break;
                case LinearLayoutParameter::LinearGravity::CENTER_HORIZONTAL:
                    finalPosX = layoutSize.width / 2.0f - cs.width * (0.5f - ap.x);
                    break;
                default:
                    break;
                }
                auto&& mg = layoutParameter->getMargin();
                finalPosX += mg.left;
                finalPosY -= mg.top;
                subWidget->setPosition(finalPosX, finalPosY);
                topBoundary = subWidget->getPosition().y -
                              subWidget->getAnchorPoint().y * subWidget->getBoundingBox().size.height - mg.bottom;
            }
        }
    }
}

// RelativeLayoutManager

RelativeLayoutManager* RelativeLayoutManager::create()
{
    RelativeLayoutManager* ret = new RelativeLayoutManager();
    ret->autorelease();
    return ret;
}

Vector<Widget*> RelativeLayoutManager::getAllWidgets(cocos2d::ui::LayoutProtocol* layout)
{
    Vector<Node*> container = layout->getLayoutElements();
    Vector<Widget*> widgetChildren;
    for (auto& subWidget : container)
    {
        Widget* child = dynamic_cast<Widget*>(subWidget);
        if (child)
        {
            RelativeLayoutParameter* layoutParameter =
                dynamic_cast<RelativeLayoutParameter*>(child->getLayoutParameter());
            layoutParameter->_put = false;
            _unlayoutChildCount++;
            widgetChildren.pushBack(child);
        }
    }
    return widgetChildren;
}

Widget* RelativeLayoutManager::getRelativeWidget(Widget* widget)
{
    Widget* relativeWidget                   = nullptr;
    RelativeLayoutParameter* layoutParameter = dynamic_cast<RelativeLayoutParameter*>(widget->getLayoutParameter());
    auto relativeName                        = layoutParameter->getRelativeToWidgetName();

    if (!relativeName.empty())
    {
        for (auto& sWidget : _widgetChildren)
        {
            if (sWidget)
            {
                RelativeLayoutParameter* rlayoutParameter =
                    dynamic_cast<RelativeLayoutParameter*>(sWidget->getLayoutParameter());
                if (rlayoutParameter && rlayoutParameter->getRelativeName() == relativeName)
                {
                    relativeWidget    = sWidget;
                    _relativeWidgetLP = rlayoutParameter;
                    break;
                }
            }
        }
    }
    return relativeWidget;
}

bool RelativeLayoutManager::calculateFinalPositionWithRelativeWidget(LayoutProtocol* layout)
{
    Vec2 ap = _widget->getAnchorPoint();
    Vec2 cs = _widget->getBoundingBox().size;

    _finalPositionX = 0.0f;
    _finalPositionY = 0.0f;

    Widget* relativeWidget = this->getRelativeWidget(_widget);

    RelativeLayoutParameter* layoutParameter = dynamic_cast<RelativeLayoutParameter*>(_widget->getLayoutParameter());

    RelativeLayoutParameter::RelativeAlign align = layoutParameter->getAlign();

    Vec2 layoutSize = layout->getLayoutContentSize();

    switch (align)
    {
    case RelativeLayoutParameter::RelativeAlign::NONE:
    case RelativeLayoutParameter::RelativeAlign::PARENT_TOP_LEFT:
        _finalPositionX = ap.x * cs.width;
        _finalPositionY = layoutSize.height - ((1.0f - ap.y) * cs.height);
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_TOP_CENTER_HORIZONTAL:
        _finalPositionX = layoutSize.width * 0.5f - cs.width * (0.5f - ap.x);
        _finalPositionY = layoutSize.height - ((1.0f - ap.y) * cs.height);
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_TOP_RIGHT:
        _finalPositionX = layoutSize.width - ((1.0f - ap.x) * cs.width);
        _finalPositionY = layoutSize.height - ((1.0f - ap.y) * cs.height);
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_LEFT_CENTER_VERTICAL:
        _finalPositionX = ap.x * cs.width;
        _finalPositionY = layoutSize.height * 0.5f - cs.height * (0.5f - ap.y);
        break;
    case RelativeLayoutParameter::RelativeAlign::CENTER_IN_PARENT:
        _finalPositionX = layoutSize.width * 0.5f - cs.width * (0.5f - ap.x);
        _finalPositionY = layoutSize.height * 0.5f - cs.height * (0.5f - ap.y);
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_RIGHT_CENTER_VERTICAL:
        _finalPositionX = layoutSize.width - ((1.0f - ap.x) * cs.width);
        _finalPositionY = layoutSize.height * 0.5f - cs.height * (0.5f - ap.y);
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_LEFT_BOTTOM:
        _finalPositionX = ap.x * cs.width;
        _finalPositionY = ap.y * cs.height;
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_BOTTOM_CENTER_HORIZONTAL:
        _finalPositionX = layoutSize.width * 0.5f - cs.width * (0.5f - ap.x);
        _finalPositionY = ap.y * cs.height;
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_RIGHT_BOTTOM:
        _finalPositionX = layoutSize.width - ((1.0f - ap.x) * cs.width);
        _finalPositionY = ap.y * cs.height;
        break;

    case RelativeLayoutParameter::RelativeAlign::LOCATION_ABOVE_LEFTALIGN:
        if (relativeWidget)
        {
            if (_relativeWidgetLP && !_relativeWidgetLP->_put)
            {
                return false;
            }
            float locationTop  = relativeWidget->getTopBoundary();
            float locationLeft = relativeWidget->getLeftBoundary();
            _finalPositionY    = locationTop + ap.y * cs.height;
            _finalPositionX    = locationLeft + ap.x * cs.width;
        }
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_ABOVE_CENTER:
        if (relativeWidget)
        {
            if (_relativeWidgetLP && !_relativeWidgetLP->_put)
            {
                return false;
            }
            Vec2 rbs          = relativeWidget->getBoundingBox().size;
            float locationTop = relativeWidget->getTopBoundary();

            _finalPositionY = locationTop + ap.y * cs.height;
            _finalPositionX = relativeWidget->getLeftBoundary() + rbs.width * 0.5f + ap.x * cs.width - cs.width * 0.5f;
        }
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_ABOVE_RIGHTALIGN:
        if (relativeWidget)
        {
            if (_relativeWidgetLP && !_relativeWidgetLP->_put)
            {
                return false;
            }
            float locationTop   = relativeWidget->getTopBoundary();
            float locationRight = relativeWidget->getRightBoundary();
            _finalPositionY     = locationTop + ap.y * cs.height;
            _finalPositionX     = locationRight - (1.0f - ap.x) * cs.width;
        }
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_LEFT_OF_TOPALIGN:
        if (relativeWidget)
        {
            if (_relativeWidgetLP && !_relativeWidgetLP->_put)
            {
                return false;
            }
            float locationTop  = relativeWidget->getTopBoundary();
            float locationLeft = relativeWidget->getLeftBoundary();
            _finalPositionY    = locationTop - (1.0f - ap.y) * cs.height;
            _finalPositionX    = locationLeft - (1.0f - ap.x) * cs.width;
        }
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_LEFT_OF_CENTER:
        if (relativeWidget)
        {
            if (_relativeWidgetLP && !_relativeWidgetLP->_put)
            {
                return false;
            }
            Vec2 rbs           = relativeWidget->getBoundingBox().size;
            float locationLeft = relativeWidget->getLeftBoundary();
            _finalPositionX    = locationLeft - (1.0f - ap.x) * cs.width;

            _finalPositionY =
                relativeWidget->getBottomBoundary() + rbs.height * 0.5f + ap.y * cs.height - cs.height * 0.5f;
        }
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_LEFT_OF_BOTTOMALIGN:
        if (relativeWidget)
        {
            if (_relativeWidgetLP && !_relativeWidgetLP->_put)
            {
                return false;
            }
            float locationBottom = relativeWidget->getBottomBoundary();
            float locationLeft   = relativeWidget->getLeftBoundary();
            _finalPositionY      = locationBottom + ap.y * cs.height;
            _finalPositionX      = locationLeft - (1.0f - ap.x) * cs.width;
        }
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_RIGHT_OF_TOPALIGN:
        if (relativeWidget)
        {
            if (_relativeWidgetLP && !_relativeWidgetLP->_put)
            {
                return false;
            }
            float locationTop   = relativeWidget->getTopBoundary();
            float locationRight = relativeWidget->getRightBoundary();
            _finalPositionY     = locationTop - (1.0f - ap.y) * cs.height;
            _finalPositionX     = locationRight + ap.x * cs.width;
        }
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_RIGHT_OF_CENTER:
        if (relativeWidget)
        {
            if (_relativeWidgetLP && !_relativeWidgetLP->_put)
            {
                return false;
            }
            Vec2 rbs            = relativeWidget->getBoundingBox().size;
            float locationRight = relativeWidget->getRightBoundary();
            _finalPositionX     = locationRight + ap.x * cs.width;

            _finalPositionY =
                relativeWidget->getBottomBoundary() + rbs.height * 0.5f + ap.y * cs.height - cs.height * 0.5f;
        }
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_RIGHT_OF_BOTTOMALIGN:
        if (relativeWidget)
        {
            if (_relativeWidgetLP && !_relativeWidgetLP->_put)
            {
                return false;
            }
            float locationBottom = relativeWidget->getBottomBoundary();
            float locationRight  = relativeWidget->getRightBoundary();
            _finalPositionY      = locationBottom + ap.y * cs.height;
            _finalPositionX      = locationRight + ap.x * cs.width;
        }
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_BELOW_LEFTALIGN:
        if (relativeWidget)
        {
            if (_relativeWidgetLP && !_relativeWidgetLP->_put)
            {
                return false;
            }
            float locationBottom = relativeWidget->getBottomBoundary();
            float locationLeft   = relativeWidget->getLeftBoundary();
            _finalPositionY      = locationBottom - (1.0f - ap.y) * cs.height;
            _finalPositionX      = locationLeft + ap.x * cs.width;
        }
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_BELOW_CENTER:
        if (relativeWidget)
        {
            if (_relativeWidgetLP && !_relativeWidgetLP->_put)
            {
                return false;
            }
            Vec2 rbs             = relativeWidget->getBoundingBox().size;
            float locationBottom = relativeWidget->getBottomBoundary();

            _finalPositionY = locationBottom - (1.0f - ap.y) * cs.height;
            _finalPositionX = relativeWidget->getLeftBoundary() + rbs.width * 0.5f + ap.x * cs.width - cs.width * 0.5f;
        }
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_BELOW_RIGHTALIGN:
        if (relativeWidget)
        {
            if (_relativeWidgetLP && !_relativeWidgetLP->_put)
            {
                return false;
            }
            float locationBottom = relativeWidget->getBottomBoundary();
            float locationRight  = relativeWidget->getRightBoundary();
            _finalPositionY      = locationBottom - (1.0f - ap.y) * cs.height;
            _finalPositionX      = locationRight - (1.0f - ap.x) * cs.width;
        }
        break;
    default:
        break;
    }
    return true;
}

void RelativeLayoutManager::calculateFinalPositionWithRelativeAlign()
{
    RelativeLayoutParameter* layoutParameter = dynamic_cast<RelativeLayoutParameter*>(_widget->getLayoutParameter());

    Margin mg = layoutParameter->getMargin();

    RelativeLayoutParameter::RelativeAlign align = layoutParameter->getAlign();

    // handle margin
    switch (align)
    {
    case RelativeLayoutParameter::RelativeAlign::NONE:
    case RelativeLayoutParameter::RelativeAlign::PARENT_TOP_LEFT:
        _finalPositionX += mg.left;
        _finalPositionY -= mg.top;
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_TOP_CENTER_HORIZONTAL:
        _finalPositionY -= mg.top;
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_TOP_RIGHT:
        _finalPositionX -= mg.right;
        _finalPositionY -= mg.top;
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_LEFT_CENTER_VERTICAL:
        _finalPositionX += mg.left;
        break;
    case RelativeLayoutParameter::RelativeAlign::CENTER_IN_PARENT:
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_RIGHT_CENTER_VERTICAL:
        _finalPositionX -= mg.right;
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_LEFT_BOTTOM:
        _finalPositionX += mg.left;
        _finalPositionY += mg.bottom;
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_BOTTOM_CENTER_HORIZONTAL:
        _finalPositionY += mg.bottom;
        break;
    case RelativeLayoutParameter::RelativeAlign::PARENT_RIGHT_BOTTOM:
        _finalPositionX -= mg.right;
        _finalPositionY += mg.bottom;
        break;

    case RelativeLayoutParameter::RelativeAlign::LOCATION_ABOVE_LEFTALIGN:
        _finalPositionY += mg.bottom;
        _finalPositionX += mg.left;
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_ABOVE_RIGHTALIGN:
        _finalPositionY += mg.bottom;
        _finalPositionX -= mg.right;
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_ABOVE_CENTER:
        _finalPositionY += mg.bottom;
        break;

    case RelativeLayoutParameter::RelativeAlign::LOCATION_LEFT_OF_TOPALIGN:
        _finalPositionX -= mg.right;
        _finalPositionY -= mg.top;
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_LEFT_OF_BOTTOMALIGN:
        _finalPositionX -= mg.right;
        _finalPositionY += mg.bottom;
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_LEFT_OF_CENTER:
        _finalPositionX -= mg.right;
        break;

    case RelativeLayoutParameter::RelativeAlign::LOCATION_RIGHT_OF_TOPALIGN:
        _finalPositionX += mg.left;
        _finalPositionY -= mg.top;
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_RIGHT_OF_BOTTOMALIGN:
        _finalPositionX += mg.left;
        _finalPositionY += mg.bottom;
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_RIGHT_OF_CENTER:
        _finalPositionX += mg.left;
        break;

    case RelativeLayoutParameter::RelativeAlign::LOCATION_BELOW_LEFTALIGN:
        _finalPositionY -= mg.top;
        _finalPositionX += mg.left;
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_BELOW_RIGHTALIGN:
        _finalPositionY -= mg.top;
        _finalPositionX -= mg.right;
        break;
    case RelativeLayoutParameter::RelativeAlign::LOCATION_BELOW_CENTER:
        _finalPositionY -= mg.top;
        break;
    default:
        break;
    }
}

void RelativeLayoutManager::doLayout(LayoutProtocol* layout)
{

    _widgetChildren = this->getAllWidgets(layout);

    while (_unlayoutChildCount > 0)
    {
        for (auto& subWidget : _widgetChildren)
        {
            _widget = static_cast<Widget*>(subWidget);

            RelativeLayoutParameter* layoutParameter =
                dynamic_cast<RelativeLayoutParameter*>(_widget->getLayoutParameter());

            if (layoutParameter)
            {
                if (layoutParameter->_put)
                {
                    continue;
                }

                bool ret = this->calculateFinalPositionWithRelativeWidget(layout);
                if (!ret)
                {
                    continue;
                }

                this->calculateFinalPositionWithRelativeAlign();

                _widget->setPosition(Vec2(_finalPositionX, _finalPositionY));

                layoutParameter->_put = true;
            }
        }
        _unlayoutChildCount--;
    }
    _widgetChildren.clear();
}

}  // namespace ui

NS_CC_END