syntax = "proto3";

package camino;

import "google/protobuf/descriptor.proto";
import "camino/schema.proto";
import "quixos/refs.proto";

extend google.protobuf.FileOptions {
  string schema_namespace = 51000;
  string schema_version = 51001;
}

extend google.protobuf.MessageOptions {
  ClassOptions class = 51010;
  repeated MethodOptions method = 51011;
  repeated MigrationOptions migration = 51012;
  InterfaceOptions interface = 51013;
  repeated ImplementsOptions implements = 51014;
  ConstructorOptions constructor = 51015;
}

extend google.protobuf.FieldOptions {
  ConflictStrategy conflict = 51020;
  EdgeOptions edge = 51021;
  FieldStorage field_storage = 51022;
  FieldOps field_ops = 51023;
  InterfaceFieldContract interface_field = 51024;
  bool display_label = 51025;
}

extend google.protobuf.MethodOptions {
  quixos.FunctionRef impl = 51030;
}

message ClassOptions {
  uint32 version = 1;
  SymbolRef id = 2;
}

message InterfaceOptions {
  uint32 version = 1;
  SymbolRef id = 2;
}

message ImplementsOptions {
  SymbolRef interface = 1;
  repeated TypeBinding type_binding = 2;
}

message ConstructorOptions {
  quixos.FunctionRef function = 1;
}

message EdgeOptions {
  SymbolRef id = 1;
  // Shorthand for other_endpoint.class.
  SymbolRef target = 2;
  // Shorthand for this_endpoint.cardinality.
  Cardinality cardinality = 3;
  // Shorthand for other_endpoint.projection.
  string inverse = 4;
  EdgeEndpointOptions this_endpoint = 5;
  EdgeEndpointOptions other_endpoint = 6;
  repeated SymbolRef tag = 7;
  repeated SymbolRef implements = 8;
  bool undirected = 9;
}

message EdgeEndpointOptions {
  SymbolRef class = 1;
  SymbolRef interface = 2;
  string projection = 3;
  Cardinality cardinality = 4;
  bool indexed = 5;
  EdgeMaterializationOptions materialize = 6;
}

message EdgeMaterializationOptions {
  SymbolRef class = 1;
  string connect_projection = 2;
}

message MethodOptions {
  string name = 1;
  quixos.FunctionRef function = 2;
}

message MigrationOptions {
  uint32 from_version = 1;
  uint32 to_version = 2;
  quixos.FunctionRef function = 3;
}