// 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_Define.h"
#include "../../include/javascript/JS_Object.h"
#include "../../include/javascript/JS_Context.h"

int FXJS_MsgBox(CPDFDoc_Environment* pApp,
                CPDFSDK_PageView* pPageView,
                const FX_WCHAR* swMsg,
                const FX_WCHAR* swTitle,
                FX_UINT nType,
                FX_UINT nIcon) {
  if (!pApp)
    return 0;

  if (CPDFSDK_Document* pDoc = pApp->GetSDKDocument())
    pDoc->KillFocusAnnot();

  return pApp->JS_appAlert(swMsg, swTitle, nType, nIcon);
}

CPDFSDK_PageView* FXJS_GetPageView(IFXJS_Context* cc) {
  if (CJS_Context* pContext = (CJS_Context*)cc) {
    if (pContext->GetReaderDocument())
      return NULL;
  }
  return NULL;
}

CJS_EmbedObj::CJS_EmbedObj(CJS_Object* pJSObject) : m_pJSObject(pJSObject) {}

CJS_EmbedObj::~CJS_EmbedObj() {
  m_pJSObject = NULL;
}

CPDFSDK_PageView* CJS_EmbedObj::JSGetPageView(IFXJS_Context* cc) {
  return FXJS_GetPageView(cc);
}

int CJS_EmbedObj::MsgBox(CPDFDoc_Environment* pApp,
                         CPDFSDK_PageView* pPageView,
                         const FX_WCHAR* swMsg,
                         const FX_WCHAR* swTitle,
                         FX_UINT nType,
                         FX_UINT nIcon) {
  return FXJS_MsgBox(pApp, pPageView, swMsg, swTitle, nType, nIcon);
}

void CJS_EmbedObj::Alert(CJS_Context* pContext, const FX_WCHAR* swMsg) {
  CJS_Object::Alert(pContext, swMsg);
}

CJS_Timer* CJS_EmbedObj::BeginTimer(CPDFDoc_Environment* pApp,
                                    FX_UINT nElapse) {
  CJS_Timer* pTimer = new CJS_Timer(this, pApp);
  pTimer->SetJSTimer(nElapse);

  return pTimer;
}

void CJS_EmbedObj::EndTimer(CJS_Timer* pTimer) {
  ASSERT(pTimer != NULL);
  pTimer->KillJSTimer();
  delete pTimer;
}

void FreeObject(const v8::WeakCallbackInfo<CJS_Object>& data) {
  CJS_Object* pJSObj = data.GetParameter();
  pJSObj->ExitInstance();
  delete pJSObj;
  JS_FreePrivate(data.GetInternalField(0));
}

void DisposeObject(const v8::WeakCallbackInfo<CJS_Object>& data) {
  CJS_Object* pJSObj = data.GetParameter();
  pJSObj->Dispose();
  data.SetSecondPassCallback(FreeObject);
}

CJS_Object::CJS_Object(JSFXObject pObject) : m_pEmbedObj(NULL) {
  v8::Local<v8::Context> context = pObject->CreationContext();
  m_pIsolate = context->GetIsolate();
  m_pObject.Reset(m_pIsolate, pObject);
};

CJS_Object::~CJS_Object(void) {
  m_pObject.Reset();
};

void CJS_Object::MakeWeak() {
  m_pObject.SetWeak(this, DisposeObject, v8::WeakCallbackType::kInternalFields);
}

void CJS_Object::Dispose() {
  m_pObject.Reset();
}

CPDFSDK_PageView* CJS_Object::JSGetPageView(IFXJS_Context* cc) {
  return FXJS_GetPageView(cc);
}

int CJS_Object::MsgBox(CPDFDoc_Environment* pApp,
                       CPDFSDK_PageView* pPageView,
                       const FX_WCHAR* swMsg,
                       const FX_WCHAR* swTitle,
                       FX_UINT nType,
                       FX_UINT nIcon) {
  return FXJS_MsgBox(pApp, pPageView, swMsg, swTitle, nType, nIcon);
}

void CJS_Object::Alert(CJS_Context* pContext, const FX_WCHAR* swMsg) {
  ASSERT(pContext != NULL);

  if (pContext->IsMsgBoxEnabled()) {
    CPDFDoc_Environment* pApp = pContext->GetReaderApp();
    if (pApp)
      pApp->JS_appAlert(swMsg, NULL, 0, 3);
  }
}

FX_UINT CJS_Timer::SetJSTimer(FX_UINT nElapse) {
  if (m_nTimerID)
    KillJSTimer();
  IFX_SystemHandler* pHandler = m_pApp->GetSysHandler();
  m_nTimerID = pHandler->SetTimer(nElapse, TimerProc);
  (*GetGlobalTimerMap())[m_nTimerID] = this;
  m_dwElapse = nElapse;
  return m_nTimerID;
}

void CJS_Timer::KillJSTimer() {
  if (m_nTimerID) {
    IFX_SystemHandler* pHandler = m_pApp->GetSysHandler();
    pHandler->KillTimer(m_nTimerID);
    GetGlobalTimerMap()->erase(m_nTimerID);
    m_nTimerID = 0;
  }
}

// static
void CJS_Timer::TimerProc(int idEvent) {
  const auto it = GetGlobalTimerMap()->find(idEvent);
  if (it != GetGlobalTimerMap()->end()) {
    CJS_Timer* pTimer = it->second;
    if (!pTimer->m_bProcessing) {
      pTimer->m_bProcessing = TRUE;
      if (pTimer->m_pEmbedObj)
        pTimer->m_pEmbedObj->TimerProc(pTimer);
      pTimer->m_bProcessing = FALSE;
    }
  }
}

// static
CJS_Timer::TimerMap* CJS_Timer::GetGlobalTimerMap() {
  // Leak the timer array at shutdown.
  static auto* s_TimerMap = new TimerMap;
  return s_TimerMap;
}