/*
 * Copyright 2016 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <iostream>

#include "base/command_line.h"
#include "base/file_path.h"
#include "base/string_util.h"
#include "cobalt/base/wrap_main.h"
#include "cobalt/script/javascriptcore/jsc_engine.h"
#include "cobalt/script/javascriptcore/jsc_global_environment.h"
#include "cobalt/script/standalone_javascript_runner.h"
#include "third_party/WebKit/Source/JavaScriptCore/config.h"
// Error.h needs to be included before JSCTypedArrayStubs.h
#include "third_party/WebKit/Source/JavaScriptCore/runtime/Error.h"
#include "third_party/WebKit/Source/JavaScriptCore/JSCTypedArrayStubs.h"  // NOLINT(build/include_alpha)
#include "third_party/WebKit/Source/JavaScriptCore/runtime/Identifier.h"
#include "third_party/WebKit/Source/JavaScriptCore/runtime/JSFunction.h"

namespace cobalt {
namespace script {
namespace javascriptcore {
namespace {

JSC::EncodedJSValue PrintFunction(JSC::ExecState* exec) {
  std::vector<std::string> string_args;
  for (uint32 i = 0; i < exec->argumentCount(); ++i) {
    string_args.push_back(
        exec->argument(i).toString(exec)->value(exec).utf8().data());
  }
  std::string joined = JoinString(string_args, ' ');
  std::cout << joined << std::endl;
  return JSC::JSValue::encode(JSC::jsUndefined());
}

void AddFunction(JSCGlobalObject* global_object, const char* name,
                 JSC::NativeFunction function, uint32 arguments) {
  JSC::Identifier identifier(global_object->globalExec(), name);
  global_object->putDirect(
      global_object->globalData(), identifier,
      JSC::JSFunction::create(global_object->globalExec(), global_object,
                              arguments, identifier.string(), function));
}

#if !USE(EXPORT_MACROS)
void AddConstructableFunction(JSCGlobalObject* global_object, const char* name,
                              JSC::NativeFunction function, uint32 arguments) {
  JSC::Identifier identifier(global_object->globalExec(), name);
  global_object->putDirect(
      global_object->globalData(), identifier,
      JSC::JSFunction::create(global_object->globalExec(), global_object,
                              arguments, identifier.string(), function,
                              JSC::NoIntrinsic, function));
}
#endif

void SetupBindings(JSCGlobalObject* global_object) {
  JSC::JSLockHolder lock(&global_object->globalData());
  AddFunction(global_object, "print", &PrintFunction, 1);

  // Getting these exported properly will take a bit of work, and it's likely
  // not worth it.
#if !USE(EXPORT_MACROS)
  AddConstructableFunction(global_object, "Uint8Array",
                           JSC::constructJSUint8Array, 1);
  AddConstructableFunction(global_object, "Uint8ClampedArray",
                           JSC::constructJSUint8ClampedArray, 1);
  AddConstructableFunction(global_object, "Uint16Array",
                           JSC::constructJSUint16Array, 1);
  AddConstructableFunction(global_object, "Uint32Array",
                           JSC::constructJSUint32Array, 1);
  AddConstructableFunction(global_object, "Int8Array",
                           JSC::constructJSInt8Array, 1);
  AddConstructableFunction(global_object, "Int16Array",
                           JSC::constructJSInt16Array, 1);
  AddConstructableFunction(global_object, "Int32Array",
                           JSC::constructJSInt32Array, 1);
  AddConstructableFunction(global_object, "Float32Array",
                           JSC::constructJSFloat32Array, 1);
  AddConstructableFunction(global_object, "Float64Array",
                           JSC::constructJSFloat64Array, 1);
#endif
}

int JSCMain(int argc, char** argv) {
  cobalt::script::StandaloneJavascriptRunner standalone_runner;
  standalone_runner.global_environment()->EnableEval();

  JSCGlobalObject* global_object =
      static_cast<JSCGlobalEnvironment*>(
          standalone_runner.global_environment().get())
          ->global_object();
  SetupBindings(global_object);

  CommandLine command_line(argc, argv);
  CommandLine::StringVector args = command_line.GetArgs();
  if (!args.empty()) {
    FilePath source_file(args[0]);
    standalone_runner.ExecuteFile(source_file);
  } else {
    standalone_runner.RunInteractive();
  }
  return 0;
}

}  // namespace
}  // namespace javascriptcore
}  // namespace script
}  // namespace cobalt

COBALT_WRAP_SIMPLE_MAIN(cobalt::script::javascriptcore::JSCMain);