syntax = "proto3";

package gitks;

import "google/protobuf/empty.proto";
import "oid.proto";

// Repository identity used by storage-facing RPCs.
message RepositoryHeader {
  // Logical storage shard or disk name.
  string storage_name = 1;
  // Path relative to the storage root, usually ending in `.git` for bare repos.
  string relative_path = 2;
  // Optional absolute path for embedded/local deployments.
  string storage_path = 3;
}

message Repository {
  RepositoryHeader header = 1;
  bool bare = 2;
  bool empty = 3;
  ObjectFormat object_format = 4;
  string default_branch = 5;
  string git_object_directory = 6;
  repeated string git_alternate_object_directories = 7;
}

message RepositoryStatistics {
  uint64 size_bytes = 1;
  uint64 loose_object_count = 2;
  uint64 packed_object_count = 3;
  uint64 packfile_count = 4;
  uint64 reference_count = 5;
  uint64 commit_graph_size_bytes = 6;
  uint64 multi_pack_index_size_bytes = 7;
}

message RepositoryConfigEntry {
  string key = 1;
  repeated string values = 2;
}

message RepositoryObjectFormatRequest {
  RepositoryHeader repository = 1;
}

message RepositoryObjectFormatResponse {
  ObjectFormat object_format = 1;
}

message GetRepositoryRequest {
  RepositoryHeader repository = 1;
}

message InitRepositoryRequest {
  RepositoryHeader repository = 1;
  bool bare = 2;
  ObjectFormat object_format = 3;
  string initial_branch = 4;
}

message DeleteRepositoryRequest {
  RepositoryHeader repository = 1;
}

message RepositoryExistsRequest {
  RepositoryHeader repository = 1;
}

message RepositoryExistsResponse {
  bool exists = 1;
}

message GetDefaultBranchRequest {
  RepositoryHeader repository = 1;
}

message GetDefaultBranchResponse {
  string name = 1;
}

message SetDefaultBranchRequest {
  RepositoryHeader repository = 1;
  string name = 2;
}

message GetRepositoryConfigRequest {
  RepositoryHeader repository = 1;
  repeated string keys = 2;
}

message GetRepositoryConfigResponse {
  repeated RepositoryConfigEntry entries = 1;
}

message SetRepositoryConfigRequest {
  RepositoryHeader repository = 1;
  repeated RepositoryConfigEntry entries = 2;
}

message RepositoryStatisticsRequest {
  RepositoryHeader repository = 1;
}

message RepositoryHealthRequest {
  RepositoryHeader repository = 1;
  bool connectivity_only = 2;
}

message RepositoryHealthResponse {
  bool ok = 1;
  repeated string warnings = 2;
  repeated string errors = 3;
  RepositoryStatistics statistics = 4;
}

message GarbageCollectRequest {
  RepositoryHeader repository = 1;
  bool prune = 2;
  bool aggressive = 3;
}

message RepackRequest {
  RepositoryHeader repository = 1;
  bool full = 2;
  bool write_bitmaps = 3;
  bool write_multi_pack_index = 4;
}

message WriteCommitGraphRequest {
  RepositoryHeader repository = 1;
  bool replace = 2;
  bool split = 3;
}

message RepositoryMaintenanceResponse {
  bool ok = 1;
  string stdout = 2;
  string stderr = 3;
}


message ListHooksRequest {
  RepositoryHeader repository = 1;
}

message HookInfo {
  string hook_type = 1;
  string level = 2; // "server" or "custom"
  string path = 3;
}

message ListHooksResponse {
  repeated HookInfo hooks = 1;
}

message SetCustomHookRequest {
  RepositoryHeader repository = 1;
  string hook_name = 2; // "pre-receive", "update", "post-receive"
  string content = 3;  // Hook script content
}

message RemoveCustomHookRequest {
  RepositoryHeader repository = 1;
  string hook_name = 2;
}


enum SnapshotStorage {
  SNAPSHOT_STORAGE_LOCAL = 0;
  SNAPSHOT_STORAGE_S3 = 1;
  SNAPSHOT_STORAGE_GCS = 2;
}

message SnapshotInfo {
  string snapshot_id = 1;
  string relative_path = 2;
  uint64 size_bytes = 3;
  string created_at = 4; // ISO 8601
  string head_oid = 5;
}

message CreateSnapshotRequest {
  RepositoryHeader repository = 1;
  SnapshotStorage storage = 2;
  string storage_path = 3;
}

message CreateSnapshotResponse {
  string snapshot_id = 1;
  uint64 size_bytes = 2;
  string head_oid = 3;
}

message RestoreSnapshotRequest {
  RepositoryHeader target_repository = 1;
  string snapshot_id = 2;
  SnapshotStorage storage = 3;
  string storage_path = 4;
}

message ListSnapshotsRequest {
  RepositoryHeader repository = 1;
  uint32 limit = 2;
}

message ListSnapshotsResponse {
  repeated SnapshotInfo snapshots = 1;
}

message DeleteSnapshotRequest {
  string snapshot_id = 1;
  SnapshotStorage storage = 2;
}


enum MoveRepositoryState {
  MOVE_STATE_UNKNOWN = 0;
  MOVE_STATE_PREPARING = 1;
  MOVE_STATE_TRANSFERRING = 2;
  MOVE_STATE_VERIFYING = 3;
  MOVE_STATE_COMPLETED = 4;
  MOVE_STATE_FAILED = 5;
  MOVE_STATE_CANCELLED = 6;
}

message MoveRepositoryRequest {
  RepositoryHeader source_repository = 1;
  RepositoryHeader target_repository = 2;
}

message MoveRepositoryResponse {
  MoveRepositoryState state = 1;
  string error_message = 2;
}

message FetchRepositoryDataRequest {
  RepositoryHeader repository = 1;
}

message FetchRepositoryDataResponse {
  bytes data = 1;
  bool done = 2;
}


message FindMergeBaseRequest {
  RepositoryHeader repository = 1;
  repeated bytes revisions = 2; // hex OIDs to find merge-base for
}

message FindMergeBaseResponse {
  string base_oid = 1;
}


message WriteRefRequest {
  RepositoryHeader repository = 1;
  string ref_name = 2;
  string new_oid = 3;
  string old_oid = 4; // expected old OID (empty = no check)
  bool force = 5;
}

message WriteRefResponse {
  bool ok = 1;
  string error = 2;
}


message SearchFilesByContentRequest {
  RepositoryHeader repository = 1;
  string query = 2;       // regex pattern
  string revision = 3;    // tree-ish to search in (default HEAD)
  uint32 max_results = 4; // default 100
  bool case_sensitive = 5;
}

message SearchFilesByContentResponse {
  repeated SearchResult results = 1;
}

message SearchFilesByNameRequest {
  RepositoryHeader repository = 1;
  string query = 2;       // regex pattern for file names
  string revision = 3;
  uint32 max_results = 4;
  bool recursive = 5;
}

message SearchFilesByNameResponse {
  repeated SearchResult results = 1;
}

message SearchResult {
  string path = 1;
  uint32 line = 2;        // 0 for name-only search
  string matched_text = 3; // the surrounding line content
}


message ObjectsSizeRequest {
  RepositoryHeader repository = 1;
  repeated string oids = 2;
}

message ObjectsSizeResponse {
  repeated ObjectSize sizes = 1;
}

message ObjectSize {
  string oid = 1;
  uint64 size = 2;
  bool found = 3;
}

message RepositorySizeRequest {
  RepositoryHeader repository = 1;
}

message RepositorySizeResponse {
  uint64 size_bytes = 1;
}


message FindLicenseRequest {
  RepositoryHeader repository = 1;
}

message FindLicenseResponse {
  string license_spdx = 1;   // SPDX identifier, e.g. "MIT"
  string license_name = 2;    // human-readable name
  double confidence = 3;      // 0.0 — 1.0
  string license_path = 4;    // path to LICENSE file
}


enum OptimizeStrategy {
  OPTIMIZE_STRATEGY_UNSPECIFIED = 0;
  OPTIMIZE_STRATEGY_HEURISTIC = 1; // auto-decide based on repo state
  OPTIMIZE_STRATEGY_AGGRESSIVE = 2;
  OPTIMIZE_STRATEGY_INCREMENTAL = 3;
}

message OptimizeRepositoryRequest {
  RepositoryHeader repository = 1;
  OptimizeStrategy strategy = 2;
}

message OptimizeRepositoryResponse {
  bool ok = 1;
  string stdout = 2;
  string stderr = 3;
}


message GetRawChangesRequest {
  RepositoryHeader repository = 1;
  string base = 2;  // revision or OID
  string head = 3;
}

message RawChange {
  enum Operation {
    RAW_CHANGE_OPERATION_UNSPECIFIED = 0;
    RAW_CHANGE_OPERATION_ADDED = 1;
    RAW_CHANGE_OPERATION_MODIFIED = 2;
    RAW_CHANGE_OPERATION_DELETED = 3;
    RAW_CHANGE_OPERATION_RENAMED = 4;
    RAW_CHANGE_OPERATION_COPIED = 5;
  }

  Operation operation = 1;
  string old_path = 2;
  string new_path = 3;
  uint32 old_mode = 4;
  uint32 new_mode = 5;
  string old_oid = 6;
  string new_oid = 7;
  double similarity = 8;
}

message GetRawChangesResponse {
  repeated RawChange changes = 1;
}


message GetLanguageStatsRequest {
  RepositoryHeader repository = 1;
  ObjectSelector revision = 2;      // defaults to HEAD if unset
  string path = 3;                  // optional: restrict to subdirectory
  uint32 max_file_size = 4;         // skip files larger than this (bytes, 0 = 512KB default)
}

message GetLanguageStatsResponse {
  repeated LanguageStat languages = 1;
  uint64 total_files = 2;
  uint64 total_bytes = 3;
  uint64 total_lines = 4;
}

message LanguageStat {
  string language = 1;              // language name, e.g. "Rust"
  string lang_type = 2;             // "programming", "markup", "data", "prose"
  uint64 file_count = 3;
  uint64 bytes = 4;
  uint64 lines = 5;
  double percentage = 6;            // percentage by bytes
}


message FetchRemoteRequest {
  RepositoryHeader repository = 1;
  string remote_url = 2;
  string remote_name = 3;  // defaults to "origin"
  repeated string refspecs = 4;
  bool force = 5;
  bool prune = 6;
}

message FetchRemoteResponse {
  bool ok = 1;
  string error = 2;
}

message CreateRepositoryFromURLRequest {
  RepositoryHeader repository = 1;
  string remote_url = 2;
  bool mirror = 3;
}

message CreateRepositoryFromURLResponse {
  Repository repository = 1;
}

service RepositoryService {
  rpc GetRepository(GetRepositoryRequest) returns (Repository);
  rpc InitRepository(InitRepositoryRequest) returns (Repository);
  rpc DeleteRepository(DeleteRepositoryRequest) returns (google.protobuf.Empty);
  rpc RepositoryExists(RepositoryExistsRequest) returns (RepositoryExistsResponse);
  rpc GetObjectFormat(RepositoryObjectFormatRequest) returns (RepositoryObjectFormatResponse);
  rpc GetDefaultBranch(GetDefaultBranchRequest) returns (GetDefaultBranchResponse);
  rpc SetDefaultBranch(SetDefaultBranchRequest) returns (google.protobuf.Empty);
  rpc GetRepositoryConfig(GetRepositoryConfigRequest) returns (GetRepositoryConfigResponse);
  rpc SetRepositoryConfig(SetRepositoryConfigRequest) returns (google.protobuf.Empty);
  rpc GetRepositoryStatistics(RepositoryStatisticsRequest) returns (RepositoryStatistics);
  rpc CheckRepositoryHealth(RepositoryHealthRequest) returns (RepositoryHealthResponse);
  rpc GarbageCollect(GarbageCollectRequest) returns (RepositoryMaintenanceResponse);
  rpc Repack(RepackRequest) returns (RepositoryMaintenanceResponse);
  rpc WriteCommitGraph(WriteCommitGraphRequest) returns (RepositoryMaintenanceResponse);

  // Hooks management
  rpc ListHooks(ListHooksRequest) returns (ListHooksResponse);
  rpc SetCustomHook(SetCustomHookRequest) returns (google.protobuf.Empty);
  rpc RemoveCustomHook(RemoveCustomHookRequest) returns (google.protobuf.Empty);

  // Snapshot operations
  rpc CreateSnapshot(CreateSnapshotRequest) returns (CreateSnapshotResponse);
  rpc RestoreSnapshot(RestoreSnapshotRequest) returns (google.protobuf.Empty);
  rpc ListSnapshots(ListSnapshotsRequest) returns (ListSnapshotsResponse);
  rpc DeleteSnapshot(DeleteSnapshotRequest) returns (google.protobuf.Empty);

  // Repository move
  rpc MoveRepository(MoveRepositoryRequest) returns (MoveRepositoryResponse);
  rpc FetchRepositoryData(FetchRepositoryDataRequest) returns (stream FetchRepositoryDataResponse);

  rpc FindMergeBase(FindMergeBaseRequest) returns (FindMergeBaseResponse);
  rpc WriteRef(WriteRefRequest) returns (WriteRefResponse);
  rpc SearchFilesByContent(SearchFilesByContentRequest) returns (SearchFilesByContentResponse);
  rpc SearchFilesByName(SearchFilesByNameRequest) returns (SearchFilesByNameResponse);

  rpc ObjectsSize(ObjectsSizeRequest) returns (ObjectsSizeResponse);
  rpc RepositorySize(RepositorySizeRequest) returns (RepositorySizeResponse);
  rpc FetchRemote(FetchRemoteRequest) returns (FetchRemoteResponse);
  rpc CreateRepositoryFromURL(CreateRepositoryFromURLRequest) returns (CreateRepositoryFromURLResponse);

  rpc FindLicense(FindLicenseRequest) returns (FindLicenseResponse);
  rpc OptimizeRepository(OptimizeRepositoryRequest) returns (OptimizeRepositoryResponse);
  rpc GetRawChanges(GetRawChangesRequest) returns (GetRawChangesResponse);
  rpc GetLanguageStats(GetLanguageStatsRequest) returns (GetLanguageStatsResponse);
}