// @project        The CERN Tape Archive (CTA)
// @brief          CTA-EOS gRPC API for CASTOR-EOS migration
// @copyright      Copyright 2019 CERN
// @license        This program is free software: you can redistribute it and/or modify
//                 it under the terms of the GNU General Public License as published by
//                 the Free Software Foundation, either version 3 of the License, or
//                 (at your option) any later version.
//
//                 This program is distributed in the hope that it will be useful,
//                 but WITHOUT ANY WARRANTY; without even the implied warranty of
//                 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//                 GNU General Public License for more details.
//
//                 You should have received a copy of the GNU General Public License
//                 along with this program.  If not, see <http://www.gnu.org/licenses/>.


// NOTE: Compile for Go with:
// protoc ./eos_grpc.proto --go_out=plugins=grpc:.


syntax = "proto3";

package eos.rpc;

option java_multiple_files = true;
option java_package = "io.grpc.eos.rpc";
option java_outer_classname = "EosProto";
option objc_class_prefix = "EOS";
option go_package = "github.com/cern-eos/grpc-proto/protobuf;eos_grpc";


service Eos {
  // Replies to a ping
  rpc Ping (PingRequest) returns (PingReply) {}  

  // ---------------------------------------------------------------------
  // NAMESPACE
  // ---------------------------------------------------------------------

  // Replies to MD requests with a stream 
  rpc MD (MDRequest) returns (stream MDResponse) {}

  // Replies to Find requests with a stream
  rpc Find (FindRequest) returns (stream MDResponse) {}

  // Replies to a NsStat operation
  rpc NsStat (NsStatRequest) returns (NsStatResponse) {}

  // Replies to an insert
  rpc ContainerInsert (ContainerInsertRequest) returns (InsertReply) {}  
  rpc FileInsert (FileInsertRequest) returns (InsertReply) {}

  // Replies to a NsRequest operation
  rpc Exec (NSRequest) returns (NSResponse) {}

  // ---------------------------------------------------------------------
  // OPENSTACK
  // ---------------------------------------------------------------------

  // Manila Driver
  rpc ManilaServerRequest (ManilaRequest) returns (ManilaResponse) {}  
}

message PingRequest {
  string authkey = 1;
  bytes message = 2;
}

message PingReply {
  bytes message = 1;
}

// ---------------------------------------------------------------------
// NAMESPACE
// ---------------------------------------------------------------------

message ContainerInsertRequest {
  repeated ContainerMdProto container = 1;
  string authkey = 2;
  bool inherit_md = 3;
}

message FileInsertRequest {
  repeated FileMdProto files = 1;
  string authkey = 2;
}

message InsertReply {
  repeated string message = 1;
  repeated uint32 retc = 2;
}

message Time {
  uint64 sec = 1;
  uint64 n_sec = 2;
}

message Checksum {
  bytes value = 1;
  string type = 2;
}

message FileMdProto {
  uint64 id = 1;
  uint64 cont_id = 2;
  uint64 uid = 3;
  uint64 gid = 4;
  uint64 size = 5;
  uint32 layout_id = 6;
  uint32 flags = 7;
  bytes name = 8;
  bytes link_name = 9;
  Time ctime = 10; // change time
  Time mtime = 11; // modification time
  Checksum checksum =12;
  repeated uint32 locations = 13;
  repeated uint32 unlink_locations = 14;
  map<string, bytes> xattrs = 15;
  bytes path = 16;
  string etag = 17;
  uint64 inode = 18;
}

message ContainerMdProto {
  uint64 id = 1;
  uint64 parent_id = 2;
  uint64 uid = 3;
  uint64 gid = 4;
  int64 tree_size = 6;
  uint32 mode = 5;
  uint32 flags = 7;
  bytes name = 8;
  Time ctime = 9;  // change time
  Time mtime = 10; // modification time
  Time stime = 11; // sync time
  map<string, bytes> xattrs = 12;
  bytes path = 13;
  string etag = 14;
  uint64 inode = 15;
}

enum TYPE { FILE = 0; CONTAINER = 1; LISTING = 2; STAT = 3;}  

enum QUOTATYPE { USER = 0; GROUP = 2; PROJECT = 3;}

enum QUOTAOP { GET = 0; SET = 1; RM = 2; RMNODE = 3;}

enum QUOTAENTRY { NONE = 0; VOLUME = 1; INODE = 2;}
     
message QuotaProto { 
  bytes path = 1;                // quota node path
  string name = 2;               // associated name for the given type
  QUOTATYPE type = 3;            // user,group,project or all quota
  uint64 usedbytes = 4;          // bytes used physical
  uint64 usedlogicalbytes = 5;   // bytes used logical 
  uint64 usedfiles = 6;          // number of files used
  uint64 maxbytes = 7;           // maximum number of bytes (volume quota)
  uint64 maxlogicalbytes = 8;    // maximum number of logical bytes (logical volume quota)
  uint64 maxfiles = 9;           // maximum number of files (inode quota)
  float percentageusedbytes = 10; // percentage of volume quota used from 0 to 100
  float percentageusedfiles = 11; // percentag of inode quota used from 0 to 100
  string statusbytes = 12;       // status string for volume quota ok,warning,exceeded
  string statusfiles = 13;       // status string for inode quota ok,warning,exceeded
}
  
message RoleId {
  uint64 uid = 1;
  uint64 gid = 2;
  string username = 3;
  string groupname = 4;
}

message MDId {
  bytes path = 1;
  fixed64 id = 2;
  fixed64 ino = 3;
  TYPE type = 4;
}

message Limit {
  bool zero = 1;
  uint64 min = 2;
  uint64 max = 3;
}

message MDSelection {
  bool select = 1;
  Limit ctime = 2;
  Limit mtime = 3;
  Limit stime = 4;
  Limit size = 5;
  Limit treesize = 6;
  Limit children = 7;
  Limit locations = 8;
  Limit unlinked_locations = 9;
  uint64 layoutid = 10;
  uint64 flags = 11;
  bool symlink = 12;
  Checksum checksum = 13;
  uint32 owner = 14;
  uint32 group = 15;
  bool owner_root = 16;
  bool group_root = 17;
  bytes regexp_filename = 18;
  bytes regexp_dirname = 19;
  map<string, bytes> xattr = 20;
}

message MDRequest {
  TYPE type = 1;
  MDId id = 2;
  string authkey = 3;
  RoleId role = 4;
  MDSelection selection = 5;
}

message MDResponse {
  TYPE type = 1;
  FileMdProto fmd = 2;
  ContainerMdProto cmd = 3;
}

message FindRequest {
  TYPE type = 1;
  MDId id = 2;
  RoleId role = 3;	
  string authkey = 4;
  uint64 maxdepth = 5;
  MDSelection selection = 6;
}

message ShareAuth {
 string prot = 1;
 string name = 2;
 string host = 3;
}


message ShareProto {
  string permission = 1;
  uint64 expires    = 2;
  string owner      = 3;
  string group      = 4;
  uint64 generation = 5;
  string path    = 6;
  bool allowtree = 7;
  string vtoken = 8;
  repeated ShareAuth origins = 9;
}

message ShareToken {
  ShareProto token = 1;
  bytes signature = 2;
  bytes serialized = 3;
  int32 seed = 4;
}

message NSRequest {
  message MkdirRequest {
    MDId id = 1;
    bool recursive = 2;
    int64 mode = 3;
  }
  
  message RmdirRequest {
    MDId id = 1;
  }
 
  message TouchRequest {
    MDId id = 1;
  }

  message UnlinkRequest {
    MDId id = 1;
    bool norecycle = 3;
  }

  message RmRequest {
    MDId id = 1;
    bool recursive = 2;
    bool norecycle = 3;
  }

  message RenameRequest {
    MDId id = 1;
    bytes target = 2;
  }

  message SymlinkRequest {
    MDId id = 1;
    bytes target = 2;
  }

  message VersionRequest {
    enum VERSION_CMD {
     CREATE= 0;
     PURGE = 1;
     LIST = 2;
     GRAB = 3;
   }
   MDId id = 1;
   VERSION_CMD cmd = 2;
   int32 maxversion = 3;
   string grabversion = 4;
  }

  message RecycleRequest {
    string key = 1; 
    enum RECYCLE_CMD {
      RESTORE = 0;
      PURGE = 1;
      LIST = 2;
    }
    RECYCLE_CMD cmd = 2;

    message RestoreFlags {
      bool force = 1;
      bool mkpath = 2;
      bool versions = 3;
    }

    message PurgeDate {
      int32 year = 1;
      int32 month = 2;
      int32 day = 3;
    }

    RestoreFlags restoreflag = 3;
    PurgeDate purgedate = 4;
  }

  message SetXAttrRequest {
    MDId id = 1;
    map<string, bytes> xattrs = 2;
    bool recursive = 3;
    repeated string keystodelete = 4;
    bool create = 5;
  }

  message ChownRequest {
    MDId id = 1;
    RoleId owner = 2;  
  }

  message ChmodRequest {
    MDId id = 1;
    int64 mode = 2;
  }

  message AclRequest {
    enum ACL_COMMAND {
      NONE = 0;
      MODIFY = 1;
      LIST   = 2;
    }

    enum ACL_TYPE {
      USER_ACL = 0;
      SYS_ACL = 1;
    }

    MDId id = 1;
    ACL_COMMAND cmd = 2;
    bool recursive = 3;
    ACL_TYPE type = 4;
    string rule    = 5;
    uint32 position = 6;
  }

  message TokenRequest {
    ShareToken token = 1;
  }

  message QuotaRequest {
    bytes path = 1;
    RoleId id = 2;
    QUOTAOP op = 3; // get or set, rm or rmnode
    uint64 maxfiles = 4; // maximum number of bytes (volume quota) for setting
    uint64 maxbytes = 5; // maximum number of bytes (volume quota) for setting
    QUOTAENTRY entry = 6; // select volume or inode entry for deletion
  }

  message ShareRequest {
    message LsShare {
      enum OutFormat {
        NONE                  = 0; //
        MONITORING            = 1; // [-m]
        LISTING               = 2; // [-l]
	JSON                  = 3; // [grpc]
      }
    OutFormat outformat   = 1; //
    string selection      = 2; //
    }

    message OperateShare {
      enum Op {
        CREATE = 0;
        REMOVE = 1;
        SHARE  = 2;
        UNSHARE = 3;
        ACCESS = 4;
        MODIFY = 5;
      }
      Op op = 1;
      string share = 2;
      string acl = 3;
      string path = 4;
      string user = 5;
      string group = 6;
    }

    oneof subcmd {
      LsShare ls    = 1;
      OperateShare op = 2;
    }
  }

  string authkey = 1;
  RoleId role = 2;

  // Actual request data object
  oneof command {
    MkdirRequest mkdir       = 21;
    RmdirRequest rmdir       = 22;
    TouchRequest touch       = 23;
    UnlinkRequest unlink     = 24;
    RmRequest rm             = 25;
    RenameRequest rename     = 26;
    SymlinkRequest symlink   = 27;
    VersionRequest version   = 28;
    RecycleRequest recycle   = 29;
    SetXAttrRequest xattr    = 30;
    ChownRequest chown       = 31;
    ChmodRequest chmod       = 32;
    AclRequest acl           = 33;
    TokenRequest token       = 34;
    QuotaRequest quota       = 35;
    ShareRequest share       = 36;
  }
}



message NSResponse {
  message ErrorResponse {
    int64 code = 1;
    string msg = 2;	
  }

  message VersionResponse {
    message VersionInfo {
      MDId   id = 1;
      Time   mtime = 2;
    }
    int64 code = 1;
    string msg = 2;	
    repeated VersionInfo versions = 3;
  }

  message RecycleResponse {
    int64 code = 1;
    string msg = 2;	
    
    message RecycleInfo {
      enum DELETIONTYPE { FILE = 0;  TREE = 1; }
      MDId   id = 1;
      RoleId owner = 2;
      Time   dtime = 3;
      uint64 size = 4;
      DELETIONTYPE type = 5;
      string key = 6;
    }   
    
    repeated RecycleInfo recycles = 3;
  }

  message AclResponse {
    int64 code = 1;
    string msg = 2;	
    string rule = 3;
  }

  message QuotaResponse {
    int64 code = 1;   
    string msg = 2;   	
    repeated QuotaProto quotanode = 3;
  }

  message ShareInfo {
    string name = 1;
    string root = 2;
    string rule = 3;
    uint64 uid = 4;
    uint64 nshared = 5;
  }

  message ShareAccess {
    string name = 1;
    bool granted = 2;
  }

  message ShareResponse {
    int64 code = 1;
    string msg = 2;    
    repeated ShareInfo shares = 3;
    repeated ShareAccess access = 4;
  }

  ErrorResponse       error = 1;
  VersionResponse     version = 2;
  RecycleResponse     recycle = 3;
  AclResponse         acl = 4;
  QuotaResponse       quota = 5;
  ShareResponse       share = 6;
}

message NsStatRequest {
  string authkey = 1;
}

message NsStatResponse {
  int64 code = 1;
  string emsg = 2;
  string state = 3;
  uint64 nfiles = 4;
  uint64 ncontainers = 5;
  uint64 boot_time = 6;
  uint64 current_fid = 7;
  uint64 current_cid = 8;
  uint64 mem_virtual = 9;
  uint64 mem_resident = 10;
  uint64 mem_share = 11;
  uint64 mem_growth = 12;
  uint64 threads = 13;
  uint64 fds = 14;
  uint64 uptime = 15;
}

// ---------------------------------------------------------------------
// OPENSTACK
// ---------------------------------------------------------------------

enum MANILA_REQUEST_TYPE {
   CREATE_SHARE = 0;
   DELETE_SHARE = 1;
   EXTEND_SHARE = 2;
   SHRINK_SHARE = 3;
   MANAGE_EXISTING = 4;
   UNMANAGE = 5;
   GET_CAPACITIES = 6;
/* EXTRA FUNCTIONS NOT IMPLEMENTED */
   /*
   CREATE_SNAPSHOT = 7;
   DELETE_SNAPSHOT = 8;
   CREATE_SHARE_FROM_SNAPSHOT = 9;
   ENSURE_SHARE = 10;
   ALLOW_ACCESS = 11;
   DENY_ACCESS = 12;
   GET_SHARE_STATS = 13;
   DO_SETUP = 14;
   SETUP_SERVER = 15;
   TEARDOWN_SERVER = 16;
   GET_NETWORK_ALLOCATIONS_NUMBER = 17;
   VERIFY_SHARE_SERVER_HANDLING = 18;
   CREATE_SHARE_GROUP = 19;
   DELETE_SHARE_GROUP = 20;
   */

}

message ManilaRequest {
   MANILA_REQUEST_TYPE request_type = 1;
   string auth_key = 2;
   string protocol = 3;
   string share_name = 4;
   string description = 5;
   string share_id = 6;
   string share_group_id = 7;
   int32 quota = 8;
   string creator = 9;
   string egroup = 10;
   string admin_egroup = 11;
   string share_host = 12;
   string share_location = 13;
}

message ManilaResponse {
   string msg = 1; //for generic messages
   int32 code = 2; // < 1 is an error -- > 1 is OK
   int64 total_used = 3;
   int64 total_capacity = 4;
   int64 new_share_quota = 5;
   string new_share_path = 6;

}