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#include "session/commands.pb.h"
#include "session/session_observer_handler.h"
#include "session/session_observer_interface.h"
#include "testing/base/public/gunit.h"

namespace mozc {
namespace session {

class SessionObserverMock : public SessionObserverInterface {
 public:
  SessionObserverMock()
      : eval_count_(0), reloaded_(false) {}
  virtual ~SessionObserverMock() {}

  void EvalCommandHandler(const commands::Command &command) {
    command_.CopyFrom(command);
    ++eval_count_;
  }

  void Reload() {
    eval_count_ = 0;
    reloaded_ = true;
    command_.Clear();
  }

  int eval_count() const {
    return eval_count_;
  }

  bool reloaded() const {
    return reloaded_;
  }

  const commands::Command &command() const {
    return command_;
  }

 private:
  int eval_count_;
  bool reloaded_;
  commands::Command command_;
  DISALLOW_COPY_AND_ASSIGN(SessionObserverMock);
};


TEST(SessionObserverHandlerTest, ObserverTest) {
  SessionObserverHandler handler;
  SessionObserverMock observer1;
  SessionObserverMock observer2;
  handler.AddObserver(&observer1);
  handler.AddObserver(&observer2);

  // Round1: EvalCommandHandler
  commands::Command command;
  command.mutable_input()->mutable_key()->set_key_code('a');
  command.mutable_output()->set_consumed(true);
  handler.EvalCommandHandler(command);

  EXPECT_EQ(1, observer1.eval_count());
  EXPECT_FALSE(observer1.reloaded());
  EXPECT_EQ('a', observer1.command().input().key().key_code());
  EXPECT_TRUE(observer1.command().output().consumed());

  EXPECT_EQ(1, observer2.eval_count());
  EXPECT_FALSE(observer2.reloaded());
  EXPECT_EQ('a', observer2.command().input().key().key_code());
  EXPECT_TRUE(observer2.command().output().consumed());

  // Round2: EvalCommandHandler
  command.Clear();
  command.mutable_input()->mutable_key()->set_key_code('z');
  command.mutable_output()->set_consumed(false);
  handler.EvalCommandHandler(command);

  EXPECT_EQ(2, observer1.eval_count());
  EXPECT_FALSE(observer1.reloaded());
  EXPECT_EQ('z', observer1.command().input().key().key_code());
  EXPECT_FALSE(observer1.command().output().consumed());

  EXPECT_EQ(2, observer2.eval_count());
  EXPECT_FALSE(observer2.reloaded());
  EXPECT_EQ('z', observer2.command().input().key().key_code());
  EXPECT_FALSE(observer2.command().output().consumed());

  // Round3: Reload
  handler.Reload();

  EXPECT_EQ(0, observer1.eval_count());
  EXPECT_TRUE(observer1.reloaded());
  EXPECT_FALSE(observer1.command().input().has_key());
  EXPECT_FALSE(observer1.command().output().has_consumed());

  EXPECT_EQ(0, observer2.eval_count());
  EXPECT_TRUE(observer2.reloaded());
  EXPECT_FALSE(observer2.command().input().has_key());
  EXPECT_FALSE(observer2.command().output().has_consumed());
}

}  // namespace session
}  // namespace mozc