/*
	GWEN
	Copyright (c) 2010 Facepunch Studios
	See license in Gwen.h
*/


#include "Gwen/Controls/TreeControl.h"
#include "Gwen/Controls/ScrollControl.h"
#include "Gwen/Utility.h"

using namespace Gwen;
using namespace Gwen::Controls;

GWEN_CONTROL_CONSTRUCTOR( TreeControl )
{
	m_TreeControl = this;
	m_bUpdateScrollBar = 2;
	m_ToggleButton->DelayedDelete();
	m_ToggleButton = NULL;
	m_Title->DelayedDelete();
	m_Title = NULL;
	m_InnerPanel->DelayedDelete();
	m_InnerPanel = NULL;

	m_bAllowMultipleSelection = false;

	m_ScrollControl = new ScrollControl( this );
	m_ScrollControl->Dock( Pos::Fill );
	m_ScrollControl->SetScroll( false, true );
	m_ScrollControl->SetAutoHideBars( true );
	m_ScrollControl->SetMargin( Margin( 1, 1, 1, 1 ) );

	m_InnerPanel = m_ScrollControl;

	m_ScrollControl->SetInnerSize( 1000, 1000 );
}

void TreeControl::Render( Skin::Base* skin )
{
	if ( ShouldDrawBackground() )
		skin->DrawTreeControl( this );
}

void TreeControl::ForceUpdateScrollBars()
{
		m_ScrollControl->UpdateScrollBars();
}

void TreeControl::OnChildBoundsChanged( Gwen::Rect /*oldChildBounds*/, Base* /*pChild*/ )
{
	
}

void TreeControl::Clear()
{
	m_ScrollControl->Clear();
}

void TreeControl::Layout( Skin::Base* skin )
{
	BaseClass::BaseClass::Layout( skin );
}

void TreeControl::PostLayout( Skin::Base* skin )
{
	BaseClass::BaseClass::PostLayout( skin );
}

void TreeControl::OnNodeAdded( TreeNode* pNode )
{
	pNode->onNamePress.Add( this, &TreeControl::OnNodeSelection );
}


void TreeControl::OnNodeSelection( Controls::Base* /*control*/ )
{
	//printf("TreeControl::OnNodeSelection\n");
	if ( !m_bAllowMultipleSelection || !Gwen::Input::IsKeyDown( Key::Control ) )
		DeselectAll();
}

				
void TreeControl::iterate(int action, int* maxItem, int* curItem)
{

	Base::List& children = m_InnerPanel->GetChildren();
	for ( Base::List::iterator iter = children.begin(); iter != children.end(); ++iter )
	{
		TreeNode* pChild = (*iter)->DynamicCastTreeNode();
		if ( !pChild ) 
			continue;
		pChild->iterate(action ,maxItem, curItem);
	}
	
}


bool TreeControl::OnKeyUp( bool bDown )
{
	if (bDown)
	{
		
//		int maxIndex = 0;
		int newIndex = 0;
		int maxItem=0;
		int curItem=-1;
		iterate(ITERATE_ACTION_FIND_SELECTED_INDEX,&maxItem,&curItem);
	//	maxIndex = maxItem;
		int targetItem = curItem;
		if (curItem>0)
		{
			maxItem=0;
			int deselectIndex = targetItem;
			targetItem--;
			newIndex = targetItem;
			iterate(ITERATE_ACTION_SELECT,&maxItem,&targetItem);
			if (targetItem<0)
			{
				maxItem=0;
				iterate(ITERATE_ACTION_DESELECT_INDEX,&maxItem,&deselectIndex);
			}
			curItem = newIndex;
		//	float amount = float(newIndex)/float(maxIndex);
			float viewSize = m_ScrollControl->m_VerticalScrollBar->getViewableContentSize();
			float contSize = m_ScrollControl->m_VerticalScrollBar->getContentSize();
		
			float curAmount = m_ScrollControl->m_VerticalScrollBar->GetScrolledAmount();
		//	float minCoordViewableWindow = curAmount*contSize;
			//float maxCoordViewableWindow = minCoordViewableWindow+viewSize;
			float minCoordSelectedItem = curItem*16.f;
	//		float maxCoordSelectedItem = (curItem+1)*16.f;
			if (contSize!=viewSize)
			{
				{
					float newAmount = float(minCoordSelectedItem)/(contSize-viewSize);
					if (newAmount<curAmount)
					{
						m_ScrollControl->m_VerticalScrollBar->SetScrolledAmount(newAmount,true);
					}
				}
				{
					int numItems = (viewSize)/16-1;
					float newAmount = float((curItem-numItems)*16)/(contSize-viewSize);

					if (newAmount>curAmount)
					{
						m_ScrollControl->m_VerticalScrollBar->SetScrolledAmount(newAmount,true);
					}
				}
			}
		}
	}
	ForceUpdateScrollBars();
	return true;
}


bool TreeControl::OnKeyDown( bool bDown )
{
	if (bDown)
	{
		
	//	int maxIndex = 0;
		int newIndex = 0;
		int maxItem=0;
		int curItem=-1;
		iterate(ITERATE_ACTION_FIND_SELECTED_INDEX,&maxItem,&curItem);
	//	maxIndex = maxItem;
		int targetItem = curItem;
		if (curItem>=0)
		{
			maxItem=0;
			int deselectIndex = targetItem;
			targetItem++;
			newIndex = targetItem;
			iterate(ITERATE_ACTION_SELECT,&maxItem,&targetItem);
			if (targetItem<0)
			{
				maxItem=0;
				iterate(ITERATE_ACTION_DESELECT_INDEX,&maxItem,&deselectIndex);
			}
			curItem= newIndex;
		//	float amount = (int)float(newIndex)/float(maxIndex);
			float viewSize = m_ScrollControl->m_VerticalScrollBar->getViewableContentSize();
			float contSize = m_ScrollControl->m_VerticalScrollBar->getContentSize();
		
			float curAmount = m_ScrollControl->m_VerticalScrollBar->GetScrolledAmount();
		//	float minCoordViewableWindow = curAmount*contSize;
			//float maxCoordViewableWindow = minCoordViewableWindow+viewSize;
			float minCoordSelectedItem = curItem*16.f;
			//float maxCoordSelectedItem = (curItem+1)*16.f;
			if (contSize!=viewSize)
			{
				{
					float newAmount = float(minCoordSelectedItem)/(contSize-viewSize);
					if (newAmount<curAmount)
					{
						m_ScrollControl->m_VerticalScrollBar->SetScrolledAmount(newAmount,true);
					}
				}
				{
					int numItems = (viewSize)/16-1;
					float newAmount = float((curItem-numItems)*16)/(contSize-viewSize);

					if (newAmount>curAmount)
					{
						m_ScrollControl->m_VerticalScrollBar->SetScrolledAmount(newAmount,true);
					}
				}
			}
		}
	}
	ForceUpdateScrollBars();
	return true;
}
extern int avoidUpdate;

bool TreeControl::OnKeyRight( bool bDown )
{
	if (bDown)
	{
		
		avoidUpdate = -3;
		
		iterate(ITERATE_ACTION_OPEN,0,0);
		int maxItem=0;
		int curItem=0;
		iterate(ITERATE_ACTION_FIND_SELECTED_INDEX,&maxItem,&curItem);
	//	float amount = float(curItem)/float(maxItem);
		float viewSize = m_ScrollControl->m_VerticalScrollBar->getViewableContentSize();
		float contSize = m_ScrollControl->m_VerticalScrollBar->getContentSize();
		
		float curAmount = m_ScrollControl->m_VerticalScrollBar->GetScrolledAmount();
	//	float minCoordViewableWindow = curAmount*contSize;
//		float maxCoordViewableWindow = minCoordViewableWindow+viewSize;
		float minCoordSelectedItem = curItem*16.f;
	//	float maxCoordSelectedItem = (curItem+1)*16.f;
		if (contSize!=viewSize)
		{
			{
				float newAmount = float(minCoordSelectedItem)/(contSize-viewSize);
				if (newAmount<curAmount)
				{
					m_ScrollControl->m_VerticalScrollBar->SetScrolledAmount(newAmount,true);
				}
			}
			{
				int numItems = (viewSize)/16-1;
				float newAmount = float((curItem-numItems)*16)/(contSize-viewSize);

				if (newAmount>curAmount)
				{
					m_ScrollControl->m_VerticalScrollBar->SetScrolledAmount(newAmount,true);
				}
			}
		}
		Invalidate();
	}
	ForceUpdateScrollBars();
	return true;
}
bool TreeControl::OnKeyLeft( bool bDown )
{
	if (bDown)
	{
		
		avoidUpdate = -3;

		

		iterate(ITERATE_ACTION_CLOSE,0,0);

		int maxItems=0;
		int curItem=0;
		iterate(ITERATE_ACTION_FIND_SELECTED_INDEX,&maxItems,&curItem);
	//	float amount = float(curItem)/float(maxItems);
		
	//	m_ScrollControl->m_VerticalScrollBar->SetScrolledAmount(amount,true);
		float viewSize = m_ScrollControl->m_VerticalScrollBar->getViewableContentSize();
		float contSize = m_ScrollControl->m_VerticalScrollBar->getContentSize();
		
		float curAmount = m_ScrollControl->m_VerticalScrollBar->GetScrolledAmount();
	//	float minCoordViewableWindow = curAmount*contSize;
	//	float maxCoordViewableWindow = minCoordViewableWindow+viewSize;
		float minCoordSelectedItem = curItem*16.f;
	//	float maxCoordSelectedItem = (curItem+1)*16.f;
		if (contSize!=viewSize)
		{
			{
				float newAmount = float(minCoordSelectedItem)/(contSize-viewSize);
				if (newAmount<curAmount)
				{
					m_ScrollControl->m_VerticalScrollBar->SetScrolledAmount(newAmount,true);
				}
			}
			{
				int numItems = (viewSize)/16-1;
				float newAmount = float((curItem-numItems)*16)/(contSize-viewSize);

				if (newAmount>curAmount)
				{
					m_ScrollControl->m_VerticalScrollBar->SetScrolledAmount(newAmount,true);
				}
				Invalidate();
			}
		}
		//viewSize/contSize

		//printf("!\n");

		//this->Layout(0);
	

	}
	ForceUpdateScrollBars();
	return true;
}