// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
// source code may only be used and distributed under the Widevine Master
// License Agreement.
#ifndef WVCDM_CDM_TEST_TEST_HOST_H_
#define WVCDM_CDM_TEST_TEST_HOST_H_

#include <map>
#include <queue>
#include <string>
#include <vector>

#include "cdm.h"
#include "test_sleep.h"

// This provides a host environment for running CDM tests. It implements the
// IStorage, IClock and ITimer interfaces that a host would normally implement,
// while allowing them to be manipulated by the test.
class TestHost : public widevine::Cdm::IStorage,
                 public widevine::Cdm::IClock,
                 public widevine::Cdm::ITimer,
                 public wvcdm::TestSleep::CallBack {
 public:
  TestHost();
  ~TestHost();
  void Reset();

  // Used for manipulating and inspecting timer states during testing.
  void ElapseTime(int64_t milliseconds) override;
  int NumTimers() const;

  // This should be called before trying to write the cert.bin file. This is
  // used when testing device provisioning.
  void SaveProvisioningInformation() { save_device_cert_ = true; }

  // widevine::Cdm::IStorage
  bool read(const std::string& name, std::string* data) override;
  bool write(const std::string& name, const std::string& data) override;
  bool exists(const std::string& name) override;
  bool remove(const std::string& name) override;
  int32_t size(const std::string& name) override;
  bool list(std::vector<std::string>* names) override;

  // widevine::Cdm::IClock
  int64_t now() override;

  // widevine::Cdm::ITimer
  void setTimeout(int64_t delay_ms, IClient* client, void* context) override;
  void cancel(IClient* client) override;

 private:
  struct Timer {
    Timer(int64_t expiry_time, IClient* client, void* context)
        : expiry_time_(expiry_time), client_(client), context_(context) {}

    bool operator<(const Timer& other) const {
      // We want to reverse the order so that the smallest expiry times go to
      // the top of the priority queue.
      return expiry_time_ > other.expiry_time_;
    }

    int64_t expiry_time() { return expiry_time_; }
    IClient* client() { return client_; }
    void* context() { return context_; }

   private:
    int64_t expiry_time_;
    IClient* client_;
    void* context_;
  };

  int64_t now_;
  std::priority_queue<Timer> timers_;

  std::string device_cert_;
  bool save_device_cert_;

  typedef std::map<std::string, std::string> StorageMap;
  StorageMap files_;
};

// Owned and managed by the test runner.
extern TestHost* g_host;
extern std::string g_sandbox_id;

#endif  // WVCDM_CDM_TEST_TEST_HOST_H_