// Copyright 2017 The Cobalt Authors. 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 <memory>

#include "base/logging.h"
#include "cobalt/script/global_environment.h"
#include "cobalt/script/script_debugger.h"
#include "cobalt/script/source_code.h"

namespace cobalt {
namespace script {

class StubScriptDebugger : public ScriptDebugger {
 public:
  StubScriptDebugger(GlobalEnvironment* global_environment, Delegate* delegate)
      : global_environment_(global_environment), delegate_(delegate) {}
  ~StubScriptDebugger() override {}

  void Attach(const std::string& state) override {}
  std::string Detach() override { return std::string(); }

  bool EvaluateDebuggerScript(const std::string& js_code,
                              std::string* out_result_utf8) override {
    // The stub just evaluates debugger scripts as if they are part of the page.
    scoped_refptr<script::SourceCode> source_code =
        script::SourceCode::CreateSourceCode(
            js_code, base::SourceLocation("[object StubScriptDebugger]", 1, 1));
    return global_environment_->EvaluateScript(source_code, out_result_utf8);
  }

  std::set<std::string> SupportedProtocolDomains() override {
    return std::set<std::string>();
  }

  bool DispatchProtocolMessage(const std::string& method,
                               const std::string& message) override {
    NOTIMPLEMENTED();
    return false;
  }

  std::string CreateRemoteObject(const ValueHandleHolder& object,
                                 const std::string& group) override {
    NOTIMPLEMENTED();
    return "{}";
  }

  const script::ValueHandleHolder* LookupRemoteObjectId(
      const std::string& object_id) override {
    NOTIMPLEMENTED();
    return nullptr;
  }

  void StartTracing(const std::vector<std::string>& categories,
                    TraceDelegate* trace_delegate) {
    NOTIMPLEMENTED();
  }
  void StopTracing() override { NOTIMPLEMENTED(); }

  PauseOnExceptionsState SetPauseOnExceptions(
      PauseOnExceptionsState state) override {
    return kNone;
  }

  // The AsyncTask functions will be called regardless whether there's a
  // functioning debugger, so don't call NOTIMPLEMENTED() to avoid log spam.
  void AsyncTaskScheduled(const void* task, const std::string& name,
                          bool recurring) override {}
  void AsyncTaskStarted(const void* task) override {}
  void AsyncTaskFinished(const void* task) override {}
  void AsyncTaskCanceled(const void* task) override {}
  void AllAsyncTasksCanceled() override {}

 private:
  GlobalEnvironment* global_environment_;
  Delegate* delegate_;
};

// Static factory method declared in public interface.
std::unique_ptr<ScriptDebugger> ScriptDebugger::CreateDebugger(
    GlobalEnvironment* global_environment, Delegate* delegate) {
  return std::unique_ptr<ScriptDebugger>(
      new StubScriptDebugger(global_environment, delegate));
}

}  // namespace script
}  // namespace cobalt