/*
    Licensed to the Apache Software Foundation (ASF) under one
    or more contributor license agreements.  See the NOTICE file
    distributed with this work for additional information
    regarding copyright ownership.  The ASF licenses this file
    to you under the Apache License, Version 2.0 (the
    "License"); you may not use this file except in compliance
    with the License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing,
    software distributed under the License is distributed on an
    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    KIND, either express or implied.  See the License for the
    specific language governing permissions and limitations
    under the License.
*/

/*
// Build with (note the location of protobuf & gohome 
// Also you cant use ~ to refer to home dir

  protoc \
  --proto_path=$HOME/go/src \
  --proto_path=$HOME/go/src/github.com/gogo/protobuf/ \
  --proto_path=. \
  --go_out=. \
  --govalidators_out=. \
  *.proto

Validation performed using
https://github.com/mwitkow/go-proto-validators


Objective:
To Create an extensible document structure that

1) Entire document is signed by the author, this signature can be verified.
2) It contains a Plaintext Message - which anyone can read
3) It contains multiple Encrypted Messages
    a) Each encrypted message can be decrytpted by different recipients.
    b) The recipients of each encrypted message are detail as Recipients in the header
*/


syntax="proto3";

package documents;
import "github.com/mwitkow/go-proto-validators/validator.proto";
import "github.com/gogo/protobuf/gogoproto/gogo.proto";
//The Encrypted Envelope

message SignedEnvelope {
    bytes Signature = 1 [(validator.field) = { length_gt: 20}];
    string SignerCID = 2 [(validator.field) = {regex: "^Q[[:alnum:]]{45}$|^$"}];
    bytes Message   = 3;
}

message Envelope {
   Header Header       = 1;
   bytes Body          = 2;
   bytes EncryptedBody = 3;
} 

message Header {
    string IPFSID                  = 1; //this is always blank in a live document, the ID of the IPFS file is insert after decoding 
    float Version                  = 2;
    int64 DateTime                 = 3 [(validator.field) = {int_gt:1564050341,int_lt:32521429541}];
    string PreviousCID             = 4;
    float BodyTypeCode             = 5;
    float BodyVersion              = 6;
    float EncryptedBodyTypeCode    = 7;
    float EncryptedBodyVersion     = 8;
    bytes EncryptedBodyIV          = 9;
    repeated Recipient Recipients  = 10 [(validator.field) = { repeated_count_max: 20}];
}

message Recipient {
    float Version         = 1;
    string CID            = 2 [(validator.field) = {regex: "^Q[[:alnum:]]{45}$|^$"}];
    bytes EncapsulatedKey = 3;
    bytes CipherText      = 4;
    bytes IV              = 5;
}


message IDDocument {
    string AuthenticationReference = 1;
    bytes BeneficiaryECPublicKey   = 2;
    bytes SikePublicKey            = 3;
    bytes BLSPublicKey             = 4;
    int64 Timestamp                = 5 [(validator.field) = {int_gt:1564050341,int_lt:32521429541}];
}


message OrderDocument {
    string Type              = 1; //This can be used to extend the types of things that an order can do.
    int64 Coin               = 2 [(validator.field) = {int_gt: -1, int_lt: 999}];
    string PrincipalCID      = 3 [(validator.field) = {regex: "^Q[[:alnum:]]{45}$|^$"}];  //empty if ok
    string BeneficiaryCID    = 4 [(validator.field) = {regex: "^Q[[:alnum:]]{45}$|^$"}];  //empty if ok
    string Reference         = 5 [(validator.field) = {string_not_empty:true}]; //an id for this order e.g. walletID
    int64 Timestamp          = 6 [(validator.field) = {int_gt:1564050341,int_lt:32521429541}];
    OrderPart2 OrderPart2    = 7;
    OrderPart3 OrderPart3    = 8;
    OrderPart4 OrderPart4    = 9;
}

message OrderPart2 {
    string CommitmentPublicKey = 1;
    string PreviousOrderCID    = 2 [(validator.field) = {regex: "^Q[[:alnum:]]{45}$|^$"}];
    int64 Timestamp            = 3 [(validator.field) = {int_gt:1564050341,int_lt:32521429541}];
}

message OrderPart3 {
    string Redemption              = 1;
    string PreviousOrderCID        = 2 [(validator.field) = {regex: "^Q[[:alnum:]]{45}$|^$"}];
    bytes BeneficiaryEncryptedData = 3;
    int64 Timestamp                = 4 [(validator.field) = {int_gt:1564050341,int_lt:32521429541}];
}

message OrderPart4 {
    string Secret           = 1;
    string PreviousOrderCID = 2 [(validator.field) = {regex: "^Q[[:alnum:]]{45}$|^$"}];
    int64 Timestamp         = 3 [(validator.field) = {int_gt:1564050341,int_lt:32521429541}];
}


message Policy{
    float Version = 1;
    string Name   = 2; 
}

message PlainTestMessage1 {
    string Nametest1 = 1;
}

message EncryptTestMessage1 {
    string Nametest2 = 1;
}

message SimpleString {
    string Content = 1;
}


//Version everything!!!!
//Mark SIKE keys with a version


// rtn = makeEnv(char* message, char* SIKEpk[],  char* encMessage, char* encapsulatedKey[], char* encapsulationVersion
// rtn = decodeEnv(char* encapsulationVersion, char* encapsulatedKey,  char* SIKEprivKey)
// rtn = sign( char* BLSsk, char* signature) 
// rtn = verify(char* signature, char* message)