syntax = "proto3";
import "types.proto";
option java_package = "com.github.semantic.analysis";
option go_package = "github.com/semantic/analysis;analysis";
package github.semantic.v1alpha1;

// Semantic's CodeAnalysis service provides endpoints for parsing, analyzing, and
// comparing source code.
service CodeAnalysis {
  // Parsing
  //
  // Parse source code blobs and return abstract syntax trees.
  rpc ParseTree(ParseTreeRequest) returns (ParseTreeResponse);

  // Diffing
  //
  // Summarize an AST diff of source blobs.
  rpc SummarizeDiff (SummarizeDiffRequest) returns (SummarizeDiffResponse);
  // AST diff of source blobs
  // rpc Diff (DiffRequest) returns (DiffResponse) {}

  // Analyzing
  //
  // Calculate an import graph for a project.
  rpc GraphImports (ImportGraphRequest) returns (ImportGraphResponse);

  // rpc GraphCalls (CallGraphRequest) returns (CallGraphResponse);

  // Check health & status of the service.
  rpc CheckHealth (HealthCheckRequest) returns (HealthCheckResponse);
}

message ParseTreeRequest {
  repeated Blob blobs = 1;
}

message ParseTreeResponse {
  bytes json_tree = 1;
  repeated ParseError errors = 2;
}

message SummarizeDiffRequest  {
  repeated BlobPair blobPairs = 1;
}

message SummarizeDiffResponse {
  repeated DiffSummary changes = 1;
  repeated ParseError errors = 2;
}

message ImportGraphRequest {
  Project project = 1;
}

message ImportGraphResponse {
  AdjList graph = 1;
  repeated string errorMessages = 2;
}

message BlobPair {
  Blob before = 1;
  Blob after = 2;
}

message DiffSummary {
  string term = 1;
  string name = 2;
  Span span = 3;
  string change = 4;
}

message ParseError {
  string error = 1;
  Span span = 2;
  string language = 3;
}

message HealthCheckRequest {
  string service = 1;
}

message HealthCheckResponse {
  enum ServingStatus {
    UNKNOWN = 0;
    SERVING = 1;
    NOT_SERVING = 2;
  }
  ServingStatus status = 1;
}