// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#include "../../include/javascript/JavaScript.h"
#include "../../include/javascript/IJavaScript.h"
#include "../../include/javascript/JS_EventHandler.h"
#include "../../include/javascript/JS_Runtime.h"
#include "../../include/javascript/JS_Context.h"
#include "../../include/javascript/JS_Define.h"
#include "../../include/javascript/JS_Object.h"
#include "../../include/javascript/JS_Value.h"
#include "../../include/javascript/Document.h"
#include "../../include/javascript/app.h"
#include "../../include/javascript/color.h"
#include "../../include/javascript/Consts.h"
#include "../../include/javascript/Document.h"
#include "../../include/javascript/event.h"
#include "../../include/javascript/Field.h"
#include "../../include/javascript/Icon.h"
#include "../../include/javascript/PublicMethods.h"
#include "../../include/javascript/report.h"
#include "../../include/javascript/util.h"
#include "../../include/javascript/JS_GlobalData.h"
#include "../../include/javascript/global.h"
#include "../../include/javascript/console.h"

#include <libplatform/libplatform.h>

CJS_RuntimeFactory::~CJS_RuntimeFactory()
{
}

IFXJS_Runtime*					CJS_RuntimeFactory::NewJSRuntime(CPDFDoc_Environment* pApp)
{
	if (!m_bInit)
	{
		JS_Initial();
                m_platform = v8::platform::CreateDefaultPlatform();
                v8::V8::InitializePlatform(m_platform);
                v8::V8::Initialize();
		
		m_bInit = TRUE;
	}
	return new CJS_Runtime(pApp);
}
void							CJS_RuntimeFactory::AddRef()
{
	//to do.Should be implemented as atom manipulation.
	m_nRef++;
}
void							CJS_RuntimeFactory::Release()
{	
	if(m_bInit)
	{
		//to do.Should be implemented as atom manipulation.
		if (--m_nRef == 0)
		{
			JS_Release();
			ReleaseGlobalData();
                        v8::V8::ShutdownPlatform();
                        delete m_platform;
                        m_platform = NULL;
			m_bInit = FALSE;
		}
	}
}

void							CJS_RuntimeFactory::DeleteJSRuntime(IFXJS_Runtime* pRuntime)
{
	if(pRuntime)
		delete (CJS_Runtime*)pRuntime;
}

CJS_GlobalData*	CJS_RuntimeFactory::NewGlobalData(CPDFDoc_Environment* pApp)
{
	if (m_pGlobalData)
	{
		m_nGlobalDataCount++;
		return m_pGlobalData;
	}
	else
	{
		m_nGlobalDataCount = 1;
		m_pGlobalData = new CJS_GlobalData(pApp);
		return m_pGlobalData;
	}
}

void CJS_RuntimeFactory::ReleaseGlobalData()
{
	m_nGlobalDataCount--;
	
	if (m_nGlobalDataCount <= 0)
	{
 		delete m_pGlobalData;
 		m_pGlobalData = NULL;
	}
}

/* ------------------------------ CJS_Runtime ------------------------------ */

CJS_Runtime::CJS_Runtime(CPDFDoc_Environment * pApp) : 
	m_pApp(pApp),
	m_pDocument(NULL),
	m_bBlocking(FALSE),
	m_pFieldEventPath(NULL),
	m_bRegistered(FALSE)
{
	m_isolate = v8::Isolate::New();
	//m_isolate->Enter();

	InitJSObjects();

	CJS_Context * pContext = (CJS_Context*)NewContext();
	JS_InitialRuntime(*this, this, pContext, m_context);
	ReleaseContext(pContext);
}

CJS_Runtime::~CJS_Runtime()
{
	for (int i=0, sz=m_ContextArray.GetSize(); i<sz; i++)
		delete m_ContextArray.GetAt(i);

	m_ContextArray.RemoveAll();

	JS_ReleaseRuntime(*this, m_context);

	RemoveEventsInLoop(m_pFieldEventPath);

	m_pApp = NULL;
	m_pDocument = NULL;
	m_pFieldEventPath = NULL;
	m_context.Reset();

	//m_isolate->Exit();
	m_isolate->Dispose();
}

FX_BOOL CJS_Runtime::InitJSObjects()
{
	v8::Isolate::Scope isolate_scope(GetIsolate());
	v8::HandleScope handle_scope(GetIsolate());
	v8::Handle<v8::Context> context = v8::Context::New(GetIsolate());
	v8::Context::Scope context_scope(context);
	//0 - 8
	if (CJS_Border::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Display::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Font::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Highlight::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Position::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_ScaleHow::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_ScaleWhen::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Style::Init(*this, JS_STATIC) < 0) return FALSE;	
	if (CJS_Zoomtype::Init(*this, JS_STATIC) < 0) return FALSE;	

	//9 - 11
	if (CJS_App::Init(*this, JS_STATIC) < 0) return FALSE;
	if (CJS_Color::Init(*this, JS_STATIC) < 0) return FALSE;   
	if (CJS_Console::Init(*this, JS_STATIC) < 0) return FALSE;

	//12 - 14
	if (CJS_Document::Init(*this, JS_DYNAMIC) < 0) return FALSE;  
	if (CJS_Event::Init(*this, JS_STATIC) < 0) return FALSE;		
	if (CJS_Field::Init(*this, JS_DYNAMIC) < 0) return FALSE;    

	//15 - 17
	if (CJS_Global::Init(*this, JS_STATIC) < 0) return FALSE;		
	if (CJS_Icon::Init(*this, JS_DYNAMIC) < 0) return FALSE;
	if (CJS_Util::Init(*this, JS_STATIC) < 0) return FALSE;

	if (CJS_PublicMethods::Init(*this) < 0) return FALSE;
	if (CJS_GlobalConsts::Init(*this) < 0) return FALSE;
	if (CJS_GlobalArrays::Init(*this) < 0) return FALSE;

	if (CJS_TimerObj::Init(*this, JS_DYNAMIC) < 0) return FALSE;
	if (CJS_PrintParamsObj::Init(*this, JS_DYNAMIC) <0) return FALSE;

	return TRUE;
}

IFXJS_Context* CJS_Runtime::NewContext()
{
	CJS_Context * p = new CJS_Context(this);
	m_ContextArray.Add(p);
	return p;
}

void CJS_Runtime::ReleaseContext(IFXJS_Context * pContext)
{
	CJS_Context* pJSContext = (CJS_Context*)pContext;

	for (int i=0, sz=m_ContextArray.GetSize(); i<sz; i++)
	{
		if (pJSContext == m_ContextArray.GetAt(i))
		{
			delete pJSContext;
			m_ContextArray.RemoveAt(i);
			break;
		}
	}
}

IFXJS_Context*	CJS_Runtime::GetCurrentContext()
{
	if(!m_ContextArray.GetSize())
		return NULL;
	return m_ContextArray.GetAt(m_ContextArray.GetSize()-1);
}

void CJS_Runtime::SetReaderDocument(CPDFSDK_Document* pReaderDoc)
{
	if (m_pDocument != pReaderDoc)
	{
		v8::Isolate::Scope isolate_scope(m_isolate);
		v8::HandleScope handle_scope(m_isolate);
		v8::Local<v8::Context> context =v8::Local<v8::Context>::New(m_isolate, m_context);
		v8::Context::Scope context_scope(context);

		m_pDocument = pReaderDoc;

		if (pReaderDoc)
		{
			JSObject pThis = JS_GetThisObj(*this);
			if(!pThis.IsEmpty())
			{
				if (JS_GetObjDefnID(pThis) == JS_GetObjDefnID(*this, L"Document"))
				{
					if (CJS_Document* pJSDocument = (CJS_Document*)JS_GetPrivate(pThis))
					{
						if (Document * pDocument = (Document*)pJSDocument->GetEmbedObject())
							pDocument->AttachDoc(pReaderDoc);
					}
				}
			}
			JS_SetThisObj(*this, JS_GetObjDefnID(*this, L"Document"));
		}
		else
		{
			JS_SetThisObj(*this, JS_GetObjDefnID(*this, L"app"));
		}
	}
}

FX_BOOL	CJS_Runtime::AddEventToLoop(const CFX_WideString& sTargetName, JS_EVENT_T eEventType)
{
	if (m_pFieldEventPath == NULL)
	{
		m_pFieldEventPath = new CJS_FieldEvent;
		m_pFieldEventPath->sTargetName = sTargetName;
		m_pFieldEventPath->eEventType = eEventType;
		m_pFieldEventPath->pNext = NULL;

		return TRUE;
	}

	//to search
	CJS_FieldEvent* p = m_pFieldEventPath;
	CJS_FieldEvent* pLast = m_pFieldEventPath;
	while (p)
	{
		if (p->eEventType == eEventType && p->sTargetName == sTargetName)
			return FALSE;

		pLast = p;
		p = p->pNext;
	}

	//to add
	CJS_FieldEvent* pNew = new CJS_FieldEvent;
	pNew->sTargetName = sTargetName;
	pNew->eEventType = eEventType;
	pNew->pNext = NULL;

	pLast->pNext = pNew;

	return TRUE;
}

void CJS_Runtime::RemoveEventInLoop(const CFX_WideString& sTargetName, JS_EVENT_T eEventType)
{
	FX_BOOL bFind = FALSE;

	CJS_FieldEvent* p = m_pFieldEventPath;
	CJS_FieldEvent* pLast = NULL;
	while (p)
	{
		if (p->eEventType == eEventType && p->sTargetName == sTargetName)
		{
			bFind = TRUE;
			break;
		}

		pLast = p;
		p = p->pNext;
	}

	if (bFind)
	{
		RemoveEventsInLoop(p);

		if (p == m_pFieldEventPath)
			m_pFieldEventPath = NULL;

		if (pLast)
			pLast->pNext = NULL;
	}
}

void CJS_Runtime::RemoveEventsInLoop(CJS_FieldEvent* pStart)
{
	CJS_FieldEvent* p = pStart;

	while (p)
	{
		CJS_FieldEvent* pOld = p;
		p = pOld->pNext;

		delete pOld;
	}
}

v8::Handle<v8::Context>	CJS_Runtime::NewJSContext()
{
	return v8::Local<v8::Context>::New(m_isolate, m_context);
}

CFX_WideString ChangeObjName(const CFX_WideString& str)
{
	CFX_WideString sRet = str;
	sRet.Replace((FX_LPCWSTR)L"_", (FX_LPCWSTR)L".");
	return sRet;
}

void CJS_Runtime::GetObjectNames(CFX_WideStringArray& array)
{
	array.RemoveAll();

	array.Add(CJS_Border::m_pClassName);
	array.Add(CJS_Display::m_pClassName);
	array.Add(CJS_Font::m_pClassName);
	array.Add(CJS_Highlight::m_pClassName);
	array.Add(CJS_Position::m_pClassName);
	array.Add(CJS_ScaleHow::m_pClassName);
	array.Add(CJS_ScaleWhen::m_pClassName);
	array.Add(CJS_Style::m_pClassName);
	array.Add(CJS_Zoomtype::m_pClassName);

	array.Add(CJS_App::m_pClassName);
	array.Add((FX_LPCWSTR)"this"); 
	array.Add(CJS_Event::m_pClassName);	

	array.Add(CJS_Global::m_pClassName);	
	array.Add(CJS_Util::m_pClassName);
}

void CJS_Runtime::GetObjectConsts(const CFX_WideString& sObjName, CFX_WideStringArray& array)
{
	JSConstSpec* pConsts = NULL;
	int nSize = 0;

	if (sObjName == CJS_Border::m_pClassName)
		CJS_Border::GetConsts(pConsts, nSize);
	else if (sObjName == CJS_Display::m_pClassName)
		CJS_Display::GetConsts(pConsts, nSize);
	else if (sObjName == CJS_Font::m_pClassName)
		CJS_Font::GetConsts(pConsts, nSize);
	else if (sObjName == CJS_Highlight::m_pClassName)
		CJS_Highlight::GetConsts(pConsts, nSize);
	else if (sObjName == CJS_Position::m_pClassName)
		CJS_Position::GetConsts(pConsts, nSize);
	else if (sObjName == CJS_ScaleHow::m_pClassName)
		CJS_ScaleHow::GetConsts(pConsts, nSize);
	else if (sObjName == CJS_ScaleWhen::m_pClassName)
		CJS_ScaleWhen::GetConsts(pConsts, nSize);
	else if (sObjName == CJS_Style::m_pClassName)
		CJS_Style::GetConsts(pConsts, nSize);
	else if (sObjName == CJS_Zoomtype::m_pClassName)
		CJS_Zoomtype::GetConsts(pConsts, nSize);

	else if (sObjName == CJS_App::m_pClassName)
		CJS_App::GetConsts(pConsts, nSize);
	else if (sObjName == CJS_Color::m_pClassName)
		CJS_Color::GetConsts(pConsts, nSize);	

	else if (sObjName == L"this") 
	{
		if (GetReaderDocument())
			CJS_Document::GetConsts(pConsts, nSize);
		else 
			CJS_App::GetConsts(pConsts, nSize);
	}

	if (sObjName == CJS_Event::m_pClassName)
		CJS_Event::GetConsts(pConsts, nSize);	
	else if (sObjName == CJS_Field::m_pClassName)
		CJS_Field::GetConsts(pConsts, nSize);	
	else if (sObjName == CJS_Global::m_pClassName)
		CJS_Global::GetConsts(pConsts, nSize);	
	else if (sObjName == CJS_Util::m_pClassName)
		CJS_Util::GetConsts(pConsts, nSize);

	for (int i=0; i<nSize; i++)
		array.Add(pConsts[i].pName);
}

void CJS_Runtime::GetObjectProps(const CFX_WideString& sObjName, CFX_WideStringArray& array)
{
	JSPropertySpec* pProperties = NULL;
	int nSize = 0;

 	if (sObjName == CJS_App::m_pClassName)
		CJS_App::GetProperties(pProperties, nSize);
	else if (sObjName == CJS_Color::m_pClassName)
		CJS_Color::GetProperties(pProperties, nSize); 
	else if (sObjName == L"this")
	{
		if (GetReaderDocument())
			CJS_Document::GetProperties(pProperties, nSize);
		else	
			CJS_App::GetProperties(pProperties, nSize);
	}
	else if (sObjName == CJS_Event::m_pClassName)
		CJS_Event::GetProperties(pProperties, nSize);	
	else if (sObjName == CJS_Field::m_pClassName)
		CJS_Field::GetProperties(pProperties, nSize);	
	else if (sObjName == CJS_Global::m_pClassName)
		CJS_Global::GetProperties(pProperties, nSize);	
	else if (sObjName == CJS_Util::m_pClassName)
		CJS_Util::GetProperties(pProperties, nSize);

	for (int i=0; i<nSize; i++)
		array.Add(pProperties[i].pName);
}

void CJS_Runtime::GetObjectMethods(const CFX_WideString& sObjName, CFX_WideStringArray& array)
{
	JSMethodSpec* pMethods = NULL;
	int nSize = 0;

 	 if (sObjName == CJS_App::m_pClassName)
		CJS_App::GetMethods(pMethods, nSize);
	else if (sObjName == CJS_Color::m_pClassName)
		CJS_Color::GetMethods(pMethods, nSize);	
	else if (sObjName == L"this") 
	{
		if (GetReaderDocument())
			CJS_Document::GetMethods(pMethods, nSize);
		else	
			CJS_App::GetMethods(pMethods, nSize);
	}
	else if (sObjName == CJS_Event::m_pClassName)
		CJS_Event::GetMethods(pMethods, nSize);	
	else if (sObjName == CJS_Field::m_pClassName)
		CJS_Field::GetMethods(pMethods, nSize);	
	else if (sObjName == CJS_Global::m_pClassName)
		CJS_Global::GetMethods(pMethods, nSize);	
	else if (sObjName == CJS_Util::m_pClassName)
		CJS_Util::GetMethods(pMethods, nSize);

	for (int i=0; i<nSize; i++)
		array.Add(pMethods[i].pName);
}

FX_BOOL  CJS_Runtime::IsEntered()
{
	return v8::Isolate::GetCurrent() == m_isolate;
}
void	CJS_Runtime::Exit()
{
	if(m_isolate) m_isolate->Exit();
}
void	CJS_Runtime::Enter()
{
	if(m_isolate) m_isolate->Enter();
}