// Copyright (c) 2012 CEF Python, see the Authors file.
// All rights reserved. Licensed under BSD 3-clause license.
// Project website: https://github.com/cztomczak/cefpython

#include "cefpython_app.h"
#include "v8utils.h"
#include "include/base/cef_logging.h"

bool V8FunctionHandler::Execute(const CefString& functionName,
 CefRefPtr<CefV8Value> thisObject,
 const CefV8ValueList& v8Arguments,
 CefRefPtr<CefV8Value>& returnValue,
 CefString& exception) {
 if (!CefV8Context::InContext()) {
 // CefV8Context::GetCurrentContext may not be called when
 // not in a V8 context.
 LOG(ERROR) << "[Renderer process] V8FunctionHandler::Execute():"
 " not inside a V8 context";
 return false;
 }
 CefRefPtr<CefV8Context> context = CefV8Context::GetCurrentContext();
 CefRefPtr<CefBrowser> browser = context.get()->GetBrowser();
 CefRefPtr<CefFrame> frame = context.get()->GetFrame();
 if (pythonCallbackId_) {
 LOG(INFO) << "[Renderer process] V8FunctionHandler::Execute():"
 " python callback";
 CefRefPtr<CefListValue> functionArguments = V8ValueListToCefListValue(
 v8Arguments);
 CefRefPtr<CefProcessMessage> processMessage = \
 CefProcessMessage::Create("ExecutePythonCallback");
 CefRefPtr<CefListValue> messageArguments = \
 processMessage->GetArgumentList();
 messageArguments->SetInt(0, pythonCallbackId_);
 messageArguments->SetList(1, functionArguments);
 browser->SendProcessMessage(PID_BROWSER, processMessage);
 returnValue = CefV8Value::CreateNull();
 return true;
 } else {
 LOG(INFO) << "[Renderer process] V8FunctionHandler::Execute():"
 " js binding";
 if (!(cefPythonApp_.get() \
 && cefPythonApp_->BindedFunctionExists( \
 browser, functionName))) {
 exception = std::string("[CEF Python] " \
 "V8FunctionHandler::Execute() FAILED: " \
 "function does not exist: ").append(functionName) \
 .append("()");
 // Must return true for the exception to be thrown.
 return true;
 }
 CefRefPtr<CefListValue> functionArguments = V8ValueListToCefListValue(
 v8Arguments);
 // TODO: losing int64 precision here.
 int frameId = (int)frame->GetIdentifier();
 CefRefPtr<CefProcessMessage> processMessage = \
 CefProcessMessage::Create("V8FunctionHandler::Execute");
 CefRefPtr<CefListValue> messageArguments = \
 processMessage->GetArgumentList();
 messageArguments->SetInt(0, frameId);
 messageArguments->SetString(1, functionName);
 messageArguments->SetList(2, functionArguments);
 browser->SendProcessMessage(PID_BROWSER, processMessage);
 returnValue = CefV8Value::CreateNull();
 return true;
 }
}