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#include "renderer/renderer_server.h"

#include <atomic>
#include <memory>
#include <string>

#include "absl/log/log.h"
#include "absl/strings/string_view.h"
#include "absl/time/clock.h"
#include "absl/time/time.h"
#include "ipc/ipc.h"
#include "ipc/ipc_test_util.h"
#include "protocol/renderer_command.pb.h"
#include "renderer/renderer_client.h"
#include "renderer/renderer_interface.h"
#include "testing/gunit.h"
#include "testing/mozctest.h"

namespace mozc {
namespace renderer {
namespace {

class TestRenderer : public RendererInterface {
 public:
  bool Activate() override { return true; }

  bool IsAvailable() const override { return true; }

  bool ExecCommand(const commands::RendererCommand& command) override {
    if (finished_.load(std::memory_order_acquire)) {
      return false;
    }
    counter_.fetch_add(1, std::memory_order_relaxed);
    return true;
  }

  void Reset() { counter_.store(0, std::memory_order_relaxed); }

  int counter() const { return counter_.load(std::memory_order_relaxed); }

  void Shutdown() { finished_.store(true, std::memory_order_release); }

 private:
  std::atomic<int> counter_ = 0;
  std::atomic<bool> finished_ = false;
};

class TestRendererServer : public RendererServer {
 public:
  int StartMessageLoop() override { return 0; }

  // Not async for testing
  bool AsyncExecCommand(absl::string_view proto_message) override {
    commands::RendererCommand command;
    command.ParseFromString(proto_message);
    return ExecCommandInternal(command);
  }
};

// A renderer launcher which does nothing.
class DummyRendererLauncher : public RendererLauncherInterface {
 public:
  void StartRenderer(
      const std::string& name, const std::string& renderer_path,
      bool disable_renderer_path_check,
      IPCClientFactoryInterface* ipc_client_factory_interface) override {
    LOG(INFO) << name << " " << renderer_path;
  }

  bool ForceTerminateRenderer(const std::string& name) override { return true; }

  void OnFatal(RendererErrorType type) override {
    LOG(ERROR) << static_cast<int>(type);
  }

  bool IsAvailable() const override { return true; }

  bool CanConnect() const override { return true; }

  void SetPendingCommand(const commands::RendererCommand& command) override {}

  void set_suppress_error_dialog(bool suppress) override {}
};

class RendererServerTest : public testing::TestWithTempUserProfile {};

TEST_F(RendererServerTest, IPCTest) {
  mozc::IPCClientFactoryOnMemory on_memory_client_factory;

  auto server = std::make_unique<TestRendererServer>();
  TestRenderer renderer;
  server->SetRendererInterface(&renderer);
#ifdef __APPLE__
  server->SetMachPortManager(on_memory_client_factory.OnMemoryPortManager());
#endif  // __APPLE__
  renderer.Reset();

  // listening event
  server->StartServer();
  absl::SleepFor(absl::Seconds(1));

  DummyRendererLauncher launcher;
  std::unique_ptr<RendererClient> client = RendererClient::CreateForTesting(
      &on_memory_client_factory, &launcher,
      RendererClient::RendererPathCheckMode::DISABLED);

  commands::RendererCommand command;
  command.set_type(commands::RendererCommand::NOOP);

  // renderer is called via IPC
  client->ExecCommand(command);
  EXPECT_EQ(renderer.counter(), 1);

  client->ExecCommand(command);
  client->ExecCommand(command);
  client->ExecCommand(command);
  EXPECT_EQ(renderer.counter(), 4);

  // Gracefully shutdown the server.
  renderer.Shutdown();
  client->ExecCommand(command);
  server->Wait();
}

}  // namespace
}  // namespace renderer
}  // namespace mozc
