// Copyright 2012 Google Inc. All Rights Reserved.
//
// OEMCrypto Client - wrapper class for C-style OEMCrypto interface
//
#ifndef CDM_BASE_CRYPTO_ENGINE_H_
#define CDM_BASE_CRYPTO_ENGINE_H_

#include <stdint.h>
#include <map>
#include <string>

#include "crypto_session.h"
#include "lock.h"
#include "wv_cdm_types.h"

namespace wvcdm {

typedef std::map<CdmSessionId,CryptoSession*> CryptoSessionMap;

class CryptoEngine {

  friend class CryptoSession;

 private:

  CryptoEngine();
  ~CryptoEngine();

 public:

  // get an instance of Crypto engine
  static CryptoEngine* GetInstance();

  bool Init();
  bool Terminate();
  bool ValidateKeybox();

  CryptoSession* CreateSession(const CdmSessionId& session_id);
  CryptoSession* FindSession(const CdmSessionId& session_id);
  bool DestroySession(const CdmSessionId& session_id);
  bool DestroySessions();

  bool GetToken(std::string* token);

  typedef enum {
    kSecurityLevelL1,
    kSecurityLevelL2,
    kSecurityLevelL3,
    kSecurityLevelUnknown
  } SecurityLevel;

  SecurityLevel GetSecurityLevel();
  bool GetDeviceUniqueId(std::string* deviceId);
  bool GetSystemId(uint32_t* systemId);
  bool GetProvisioningId(std::string* provisioningId);

private:

  void DeleteInstance();
  static CryptoEngine* CreateSingleton();

  CryptoSession* FindSessionInternal(const CdmSessionId& session_id);

  static CryptoEngine* crypto_engine_;
  static Lock crypto_engine_lock_;

  bool initialized_;
  mutable Lock crypto_lock_;
  mutable Lock sessions_lock_;
  CryptoSessionMap sessions_;

  CORE_DISALLOW_COPY_AND_ASSIGN(CryptoEngine);
};

}; // namespace wvcdm

#endif  // CDM_BASE_CRYPTO_ENGINE_H_