syntax = "proto3";

option go_package = "github.com/traP-jp/plutus/api/protobuf;cornucopia";
option java_multiple_files = true;
option java_package = "jp.trap.plutus.api";
option java_outer_classname = "Plutus";

package plutus;

import "google/protobuf/timestamp.proto";

service CornucopiaService {
  rpc CreateAccount (CreateAccountRequest) returns (CreateAccountResponse) {}
  rpc GetAccount (GetAccountRequest) returns (GetAccountResponse) {}
  rpc GetAccounts (GetAccountsRequest) returns (GetAccountsResponse) {}
  rpc ListAccounts (ListAccountsRequest) returns (ListAccountsResponse) {}
  rpc Transfer (TransferRequest) returns (TransferResponse) {}
  rpc GetJournalEntries (GetJournalEntriesRequest) returns (GetJournalEntriesResponse) {}
}

message CreateAccountRequest {
  bool can_overdraft = 1;
}

message CreateAccountResponse {
  string account_id = 1;
  int64 balance = 2;
  bool can_overdraft = 3;
}

message GetAccountRequest {
  string account_id = 1;
}

message GetAccountResponse {
  string account_id = 1;
  int64 balance = 2;
  bool can_overdraft = 3;
}

message GetAccountsRequest {
  repeated string account_ids = 1;
}

message GetAccountsResponse {
  repeated Account accounts = 1;
}

message ListAccountsRequest {
  int32 limit = 1;
  int32 offset = 2;
  optional int64 min_balance = 3;
  optional int64 max_balance = 4;
  optional bool can_overdraft = 5;
  SortField sort_field = 6;
  SortOrder sort_order = 7;
}

enum SortField {
  SORT_FIELD_UNSPECIFIED = 0;
  SORT_FIELD_ACCOUNT_ID = 1;
  SORT_FIELD_BALANCE = 2;
}

enum SortOrder {
  SORT_ORDER_UNSPECIFIED = 0;
  SORT_ORDER_ASC = 1;
  SORT_ORDER_DESC = 2;
}

message ListAccountsResponse {
  repeated Account accounts = 1;
  int32 total_count = 2;
}

message Account {
  string account_id = 1;
  int64 balance = 2;
  bool can_overdraft = 3;
}

message TransferRequest {
  string from_account_id = 1;
  string to_account_id = 2;
  int64 amount = 3;
  string description = 4;
  string idempotency_key = 5;
}

message TransferResponse {
  string journal_entry_id = 1;
  google.protobuf.Timestamp created_at = 2;
}

message GetJournalEntriesRequest {
  string account_id = 1;
  int32 limit = 2;
  int32 offset = 3;
}

message GetJournalEntriesResponse {
  repeated JournalEntry journal_entries = 1;
}

message JournalEntry {
  string journal_entry_id = 1;
  string from_account_id = 2;
  string to_account_id = 3;
  int64 amount = 4;
  string description = 5;
  google.protobuf.Timestamp created_at = 6;
}