syntax = "proto3";

package camino;

import "camino/schema.proto";
import "quixos/refs.proto";

service CaminoService {
  rpc ExecuteQuery(QueryRequest) returns (QueryResponse);
  rpc QueryChanges(QueryChangesRequest) returns (QueryChangesResponse);
  rpc InstallPersistencePlan(InstallPersistencePlanRequest) returns (InstallPersistencePlanResponse);
  rpc GetPersistencePlan(GetPersistencePlanRequest) returns (GetPersistencePlanResponse);
  rpc CreateObject(CreateObjectRequest) returns (CreateObjectResponse);
  rpc GetObject(GetObjectRequest) returns (GetObjectResponse);
  rpc ListObjects(ListObjectsRequest) returns (ListObjectsResponse);
  rpc ReadState(ReadStateRequest) returns (ReadStateResponse);
  rpc WriteState(WriteStateRequest) returns (WriteStateResponse);
  rpc ConnectEdge(ConnectEdgeRequest) returns (ConnectEdgeResponse);
  rpc ResolveEdge(ResolveEdgeRequest) returns (ResolveEdgeResponse);
  rpc DisconnectEdge(DisconnectEdgeRequest) returns (DisconnectEdgeResponse);
  rpc ReadCollection(ResolveEdgeRequest) returns (ReadCollectionResponse);
  rpc ReplaceCollection(ReplaceCollectionRequest) returns (ReadCollectionResponse);
  rpc ListOps(ListOpsRequest) returns (ListOpsResponse);
  rpc WatchObject(WatchObjectRequest) returns (stream WatchObjectEvent);
}

message NullValue {}
message ObjectValue {
  map<string, Value> fields = 1;
}
message ListValue {
  repeated Value values = 1;
}
message RefValue {
  string object_id = 1;
}
message CrdtValue {
  string type = 1;
  string encoding = 2;
  bytes payload = 3;
}

message StateValueSource {
  string object_id = 1;
  string slot_id = 2;
  string value_type_json = 3;
  string storage_policy_json = 4;
  uint64 revision = 5;
  // CRDT-backed state is still read as its materialized Value. The snapshot
  // travels with the writable source identity so a client can retain and
  // advance a local replica without exposing the document to package code.
  CrdtValue crdt_snapshot = 6;
}

message ValueSource {
  StateValueSource state = 1;
}

message Value {
  oneof kind {
    NullValue null_value = 1;
    bool bool_value = 2;
    double number_value = 3;
    string string_value = 4;
    string integer_value = 5;
    bytes bytes_value = 6;
    ObjectValue object_value = 7;
    ListValue list_value = 8;
    RefValue ref_value = 9;
    CrdtValue crdt_value = 10;
  }
  ValueSource source = 11;
  // Trusted query coordinator annotation. Travels with values through residual
  // row selection, then is removed in favor of final-path hydration metadata.
  QueryFieldOrigin query_origin = 12;
}

message QueryFieldOrigin {
  string selection_id = 1;
  string atom_id = 2;
  string interface_revision_id = 3;
  string member_id = 4;
  StateValueSource source = 5;
}
message QueryLiveField {
  repeated QueryPathPart path = 1;
  string selection_id = 2;
  string object_id = 3;
  quixos.CapabilityRef capability = 4;
  string watch_operation_id = 5;
  string setter_operation_id = 6;
  quixos.FieldEditing editing = 7;
  StateValueSource source = 8;
}

message InstallPersistencePlanRequest {
  PersistencePlan plan = 1;
}
message InstallPersistencePlanResponse {
  PersistencePlan plan = 1;
}
message GetPersistencePlanRequest {}
message GetPersistencePlanResponse {
  PersistencePlan plan = 1;
}

message CreateObjectRequest {
  string atom_id = 1;
  map<string, Value> initial_state = 2;
}
message CreateObjectResponse {
  CaminoObject object = 1;
}
message GetObjectRequest {
  string object_id = 1;
}
message GetObjectResponse {
  CaminoObject object = 1;
}
message ListObjectsRequest {
  string atom_id = 1;
}
message ListObjectsResponse {
  repeated CaminoObject objects = 1;
}

message ReadStateRequest {
  string object_id = 1;
  string slot_id = 2;
}
message ReadStateResponse {
  Value value = 1;
}
message WriteStateRequest {
  string object_id = 1;
  string slot_id = 2;
  Value value = 3;
  string client_mutation_id = 4;
}
message WriteStateResponse {
  Value value = 1;
  CaminoObject object = 2;
}

message ConnectEdgeRequest {
  string edge_type_id = 1;
  string projection_id = 2;
  string object_id = 3;
  string target_object_id = 4;
  optional int32 ordinal = 5;
  optional int32 target_ordinal = 6;
}
message ConnectEdgeResponse {
  CaminoEdge edge = 1;
}
message ResolveEdgeRequest {
  string object_id = 1;
  string edge_type_id = 2;
  string projection_id = 3;
}
message ResolveEdgeResponse {
  repeated CaminoEdge edges = 1;
}
message DisconnectEdgeRequest {
  string edge_id = 1;
}
message DisconnectEdgeResponse {
  string edge_id = 1;
}

message CollectionEntry {
  // Existing entry identity to preserve; empty allocates a new canonical edge.
  string edge_id = 1;
  string target_object_id = 2;
  Value key = 3;
}
message ReadCollectionResponse {
  uint64 revision = 1;
  repeated CollectionEntry entries = 2;
}
message ReplaceCollectionRequest {
  string object_id = 1;
  string edge_type_id = 2;
  string projection_id = 3;
  uint64 expected_revision = 4;
  repeated CollectionEntry entries = 5;
}

message ListOpsRequest {
  string object_id = 1;
}
message ListOpsResponse {
  repeated CaminoOp ops = 1;
}
message WatchObjectRequest {
  string object_id = 1;
  string after_op_id = 2;
  bool include_snapshot = 3;
  // Managed runtimes must watch only their injected attachments.
  repeated string attachment_ids = 4;
}
message WatchObjectEvent {
  string object_id = 1;
  CaminoObject snapshot = 2;
  CaminoOp op = 3;
}

message CaminoObject {
  string id = 1;
  string atom_id = 2;
  string workspace_revision_id = 3;
  string created_at = 4;
  string updated_at = 5;
  map<string, Value> state = 6;
  map<string, uint64> state_revisions = 7;
}

message CaminoEdge {
  string id = 1;
  string edge_type_id = 2;
  string first_object_id = 3;
  string second_object_id = 4;
  string first_projection_id = 5;
  string second_projection_id = 6;
  optional int32 first_ordinal = 7;
  optional int32 second_ordinal = 8;
  string created_at = 9;
  string first_key_json = 10;
  string second_key_json = 11;
}

message CaminoOp {
  string id = 1;
  string object_id = 2;
  string op_kind = 3;
  Value payload = 4;
  string actor = 5;
  string created_at = 6;
  string client_mutation_id = 7;
}

message QueryRequest {
  string query_id = 1;
  string object_id = 2;
  map<string, Value> variables = 3;
  // Typed callers require this exact checked definition. Administrative/raw
  // callers may omit it to explicitly select the currently installed definition.
  string expected_definition_digest = 4;
}
message QueryPathPart {
  oneof part {
    string field = 1;
    uint32 index = 2;
  }
}
message QueryPendingField {
  repeated QueryPathPart path = 1;
  string object_id = 2;
  string interface_revision_id = 3;
  string member_id = 4;
  string operation_id = 5;
  string value_type_json = 6;
  // Internal residual facts are separate from the authored result projection.
  optional uint32 residual_window = 7;
  uint32 residual_row = 8;
  string residual_field = 9;
  optional uint32 relational_capture = 10;
  uint32 captured_object = 11;
}
message QueryStats {
  uint32 sql_count = 1;
  double sql_ms = 2;
  uint32 rpc_count = 3;
  double rpc_ms = 4;
  uint32 result_bytes = 5;
  double preparation_ms = 6;
  double total_ms = 7;
  uint32 relational_stages = 8;
  uint32 captured_candidates = 9;
  double relational_ms = 10;
  double residual_ms = 11;
}
message QueryResponse {
  Value value = 1;
  string data_version = 2;
  string binding_digest = 3;
  repeated QueryPendingField pending = 4;
  QueryStats stats = 5;
  // Redeemable only through the host's private control socket, not an RPC grant.
  string preparation_token = 6;
  repeated QueryFieldFailure errors = 7;
  repeated QueryResidualWindow residual_windows = 8;
  // Native reads share one database snapshot; package enrichment does not.
  string consistency = 9;  // native-snapshot | mixed
  repeated QueryRelationalCapture relational_captures = 10;
  repeated QueryLiveField live_fields = 11;
}

// Private coordinator input, removed before publishing a result. Memberships
// and native facts share one snapshot; package reads are sampled afterwards.
message QueryCapturedMember {
  string object_id = 1;
  string entry_id = 2;
  Value map_key = 3;
}
message QueryCapturedMembers {
  repeated QueryCapturedMember entries = 1;
}
message QueryCapturedObject {
  string object_id = 1;
  map<string, Value> fields = 2;
  map<string, string> field_types = 3;
  map<string, QueryCapturedMembers> relationships = 4;
}
message QueryRelationalCapture {
  repeated QueryPathPart path = 1;
  QueryRelationalPlan plan = 2;
  string root_object_id = 3;
  repeated QueryCapturedObject objects = 4;
  string variables_json = 5;
  uint32 row_limit = 6;
  uint32 candidate_limit = 7;
  optional uint32 residual_window = 8;
  repeated string result_path = 9;
}

message QueryResidualRow {
  string entry_id = 1;
  map<string, Value> fields = 2;
}
message QueryResidualOrder {
  string field = 1;
  bool descending = 2;
}
message QueryResidualWindow {
  repeated QueryPathPart path = 1;
  repeated QueryResidualRow rows = 2;
  string predicate_json = 3;
  repeated QueryResidualOrder order = 4;
  uint32 limit = 5;
  bool bounded_all = 6;
  repeated QuerySelection selection = 7;
  map<string, string> field_types = 8;
  bool relational = 9;
  repeated string matched_entries = 10;
}

message QueryFieldFailure {
  repeated QueryPathPart path = 1;
  string error = 2;
}
message QueryChangesRequest {
  string query_id = 1;
  string object_id = 2;
  string data_version = 3;
}
message QueryChangesResponse {
  bool changed = 1;
}