// Connect (crpc) contract for the gitrpc JSON-RPC server.
//
// This is a faithful translation of the hand-written JSON-RPC method set in
// handlers.go (registerRepoMethods + registerWriteMethods) plus the gitcmd
// result types those handlers return verbatim. Every rpc below maps 1:1 to a
// "repo.<name>" JSON-RPC method (noted in each comment); every message field
// keeps the snake_case name of the corresponding Go struct json tag so the
// wire shape matches what gitrpc serializes today.
//
// The server is path-driven and stateless: every method takes the repository
// NAME (owner/name.git) in `repo`; the server resolves it to an on-disk path
// and has already authorized the call before the handler runs. Auth/ACL and
// name->path resolution live in the caller (simpleconsole), not here.
//
// Generate Go + TS with protoc-gen-es (TS) / protoc-gen-go + protoc-gen-connect-go:
//   protoc -I . --go_out=. --go_opt=paths=source_relative \
//     --connect_go_out=. --connect_go_opt=paths=source_relative \
//     --es_out=./gen --es_opt=target=ts \
//     --plugin=protoc-gen-es=./node_modules/.bin/protoc-gen-es \
//     gitrpc.proto

syntax = "proto3";

package simplegit.v1;

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

option go_package = "simplegit/gitrpc/v1;v1";

// GitService is the git kernel facade: pure git operations over a resolved,
// already-authorized on-disk repo path. Bound localhost-only; no identity store.
service GitService {
  // repo.listBranches
  rpc ListBranches(RepoRequest) returns (ListBranchesResponse);

  // repo.listTags
  rpc ListTags(RepoRequest) returns (ListTagsResponse);

  // repo.listCommits
  rpc ListCommits(ListCommitsRequest) returns (ListCommitsResponse);

  // repo.listCommitsByPath
  rpc ListCommitsByPath(ListCommitsByPathRequest) returns (ListCommitsResponse);

  // repo.getCommit
  rpc GetCommit(GetCommitRequest) returns (CommitDetail);

  // repo.getCommitDiff
  rpc GetCommitDiff(GetCommitDiffRequest) returns (DiffResult);

  // repo.getTree
  rpc GetTree(GetTreeRequest) returns (Tree);

  // repo.getBlob
  rpc GetBlob(GetBlobRequest) returns (Blob);

  // repo.compare
  rpc Compare(CompareRequest) returns (CompareResult);

  // repo.blame
  rpc Blame(BlameRequest) returns (BlameResult);

  // repo.getContributors
  rpc GetContributors(GetContributorsRequest) returns (GetContributorsResponse);

  // repo.getStats
  rpc GetStats(RepoRequest) returns (RepoStats);

  // repo.countObjects
  rpc CountObjects(RepoRequest) returns (CountObjectsResult);

  // repo.createFile
  rpc CreateFile(CreateFileRequest) returns (FileCommitResult);

  // repo.deleteFile
  rpc DeleteFile(DeleteFileRequest) returns (FileCommitResult);

  // repo.merge
  rpc Merge(MergeRequest) returns (MergeResult);
}

// ManageService is the management surface backed by the self-contained state DB
// (state.IStateMut): repo lifecycle + ACL grants. Bound to a SEPARATE localhost
// port (-manage) from GitService; authenticated with a console system token
// (the Updater / console is the caller). Unlike GitService these mutate the
// state DB, not just git.
service ManageService {
  // Create a repo (git init --bare). Reuses the namespace's NamespaceID if it
  // exists, else mints a new one.
  rpc CreateRepo(CreateRepoRequest) returns (google.protobuf.Empty);
  // OK if the repo is registered; NotFound otherwise.
  rpc ExistRepo(ExistRepoRequest) returns (google.protobuf.Empty);
  // Remove a repo (DB row + repo-targeted ACL grants + on-disk dir).
  rpc DeleteRepo(DeleteRepoRequest) returns (google.protobuf.Empty);
  // Move/rename a repo (transfer and/or rename).
  rpc MoveRepo(MoveRepoRequest) returns (google.protobuf.Empty);
  // Rename a namespace (all its repos); NamespaceID is stable.
  rpc MoveNS(MoveNSRequest) returns (google.protobuf.Empty);

  // Grant an SSH key perm on a namespace; registers the key if new. Returns the ACL id.
  rpc ACLUpsertSSHKeyOnNS(ACLUpsertSSHKeyOnNSRequest) returns (ACLIDResponse);
  // Grant a PAT perm on a namespace; creates the PAT if new. Returns the ACL id.
  rpc ACLUpsertPATOnNS(ACLUpsertPATOnNSRequest) returns (ACLIDResponse);
  // Grant an SSH key perm on a repo; registers the key if new. Returns the ACL id.
  rpc ACLUpsertSSHKeyOnRepo(ACLUpsertSSHKeyOnRepoRequest) returns (ACLIDResponse);
  // Grant a PAT perm on a repo; creates the PAT if new. Returns the ACL id.
  rpc ACLUpsertPATOnRepo(ACLUpsertPATOnRepoRequest) returns (ACLIDResponse);
  // Remove a single ACL grant by id.
  rpc ACLDelete(ACLDeleteRequest) returns (google.protobuf.Empty);

  // Daemon status + config: startup params, listen locations, start time /
  // uptime, and the state DB URI (gitctl uses db_uri to connect directly for
  // inspection reads -- there is no list RPC on this service). Diagnostics only;
  // does not touch the DB.
  rpc Status(google.protobuf.Empty) returns (StatusResponse);
}

// ---------- shared request messages ----------

// repoParams: the repository name (owner/name.git). JSON key is "repo" so it
// never collides with the in-repo file "path" param several methods also carry.
message RepoRequest {
  string repo = 1;
}

message ListCommitsRequest {
  string repo = 1;
  string ref = 2;   // "" -> HEAD (server-side default)
  int32 limit = 3;
}

message ListCommitsByPathRequest {
  string repo = 1;
  string ref = 2;
  string path = 3;
  int32 limit = 4;
}

message GetCommitRequest {
  string repo = 1;
  string sha = 2;
}

message GetCommitDiffRequest {
  string repo = 1;
  string sha = 2;
}

message GetTreeRequest {
  string repo = 1;
  string ref = 2;
  string path = 3;  // "" for repo root
}

message GetBlobRequest {
  string repo = 1;
  string ref = 2;
  string path = 3;
}

message CompareRequest {
  string repo = 1;
  string base = 2;  // "" -> HEAD
  string head = 3;  // "" -> HEAD
}

message BlameRequest {
  string repo = 1;
  string ref = 2;
  string path = 3;
}

message GetContributorsRequest {
  string repo = 1;
  string ref = 2;  // "" -> default branch
}

// Write-path requests carry the caller-resolved commit identity
// (author_name / author_email): the server has no identity store. `strategy`
// selects the gitcmd implementation ("plumbing" default, "temprepo" for the
// Gitea-style temp-clone+push that runs hooks).

message CreateFileRequest {
  string repo = 1;
  string branch = 2;
  string path = 3;
  string content = 4;
  string message = 5;
  string author_name = 6;
  string author_email = 7;
  string expected_sha = 8;  // atomic ref update against this branch tip
  string strategy = 9;      // "" / "plumbing" / "temprepo"
}

message DeleteFileRequest {
  string repo = 1;
  string branch = 2;
  string path = 3;
  string message = 4;
  string author_name = 5;
  string author_email = 6;
  string expected_sha = 7;
  string strategy = 8;
}

message MergeRequest {
  string repo = 1;
  string base = 2;
  string head = 3;
  string message = 4;
  string author_name = 5;
  string author_email = 6;
  bool no_ff = 7;
  string strategy = 8;
}

// ---- ManageService requests ----

message CreateRepoRequest {
  string ns = 1;
  string name = 2;
}

message ExistRepoRequest {
  string ns = 1;
  string name = 2;
}

message DeleteRepoRequest {
  string ns = 1;
  string name = 2;
}

message MoveRepoRequest {
  string src = 1;  // old ns/name
  string dst = 2;  // new ns/name
}

message MoveNSRequest {
  string src = 1;  // old namespace
  string dst = 2;  // new namespace
}

message ACLUpsertSSHKeyOnNSRequest {
  string ns = 1;
  string key = 2;   // authorized-keys text
  string perm = 3;  // read | write | admin
}

message ACLUpsertPATOnNSRequest {
  string ns = 1;
  string pat = 2;   // plaintext PAT
  string perm = 3;
}

message ACLUpsertSSHKeyOnRepoRequest {
  string reponame = 1;  // ns/name
  string key = 2;
  string perm = 3;
}

message ACLUpsertPATOnRepoRequest {
  string reponame = 1;
  string pat = 2;
  string perm = 3;
}

message ACLDeleteRequest {
  int64 acl_id = 1;
}

// ---- ManageService Status (diagnostics) ----

// StatusResponse is the daemon's config + runtime snapshot. db_uri is the state
// DB connection string (sqlite://<path> or postgres://<dsn>) gitctl connects to
// directly for inspection reads; it carries credentials when postgres, so the
// manage port must stay localhost-only/trusted.
message StatusResponse {
  string root = 1;                              // -root (git root)
  string rpc_addr = 2;                          // -rpc listen
  string ssh_addr = 3;                          // -ssh listen
  string manage_addr = 4;                       // -manage listen
  string auth_url = 5;                          // -auth RBAC center ("" if skip-auth)
  string db_uri = 6;                            // -db state DB URI
  bool skip_auth = 7;                           // -skip-auth
  google.protobuf.Timestamp started_at = 8;     // daemon start time
  int64 uptime_seconds = 9;                     // seconds since started_at
}

// ---------- scalar/repeated response wrappers ----------
// (proto rpc returns must be a message; these wrap the non-message returns.)

message ACLIDResponse {
  int64 acl_id = 1;
}

message ListBranchesResponse {
  repeated Branch branches = 1;
}

message ListTagsResponse {
  repeated Tag tags = 1;
}

message ListCommitsResponse {
  repeated Commit commits = 1;
}

message GetContributorsResponse {
  repeated Contributor contributors = 1;
}

// ---------- data messages (gitcmd result types) ----------

// gitcmd.Commit. Pinned snake_case json so renaming Go fields does not drift
// the wire contract.
message Commit {
  string id = 1;            // full 40-char SHA
  string short_sha = 2;     // 7-char abbreviated SHA
  string message = 3;       // full commit message
  string author = 4;        // author name
  string author_email = 5;  // author email
  google.protobuf.Timestamp when = 6;  // author timestamp
  repeated string parents = 7;         // parent SHAs
}

// gitcmd.CommitDetail extends Commit with file change statistics. Commit fields
// are nested (proto has no struct embedding) rather than flattened.
message CommitDetail {
  Commit commit = 1;
  DiffStats stats = 2;
  repeated FileDiff files = 3;
}

message DiffStats {
  int32 additions = 1;
  int32 deletions = 2;
  int32 total = 3;
  int32 files = 4;
}

message FileDiff {
  string path = 1;
  int32 additions = 2;
  int32 deletions = 3;
  string status = 4;  // A (added), M (modified), D (deleted), R (renamed)
}

message Branch {
  string name = 1;
  string sha = 2;
  string short_sha = 3;
  string message = 4;
  string author = 5;
  google.protobuf.Timestamp when = 6;
  bool is_default = 7;
}

message Tag {
  string name = 1;
  string sha = 2;
  string short_sha = 3;
  string message = 4;
  string tagger = 5;
  google.protobuf.Timestamp tag_date = 6;
  bool is_annotated = 7;
}

message TreeEntry {
  string name = 1;
  string path = 2;
  string type = 3;  // "blob" (file) or "tree" (directory)
  string mode = 4;  // git mode, e.g. "100644", "040000"
  int64 size = 5;   // file size in bytes (0 for directories)
  string sha = 6;
}

message Tree {
  string ref = 1;
  string path = 2;
  repeated TreeEntry entries = 3;
}

message Blob {
  string ref = 1;
  string path = 2;
  string content = 3;   // raw file content (text or base64-encoded binary)
  string encoding = 4;  // "text" or "base64"
  int64 size = 5;
  string sha = 6;
  bool is_binary = 7;
}

message DiffLine {
  string type = 1;  // "context", "add", "delete"
  string text = 2;  // line content without the leading sigil
}

message Hunk {
  int32 old_start = 1;  // 0 if the old side is absent
  int32 old_count = 2;
  int32 new_start = 3;  // 0 if the new side is absent
  int32 new_count = 4;
  repeated DiffLine lines = 5;
}

message FileChange {
  string path = 6;      // resulting path (new path; old path if deleted)
  string old_path = 1;  // set only on rename/copy
  string status = 2;    // A / M / D / R
  bool is_binary = 3;
  int32 additions = 4;
  int32 deletions = 5;
  repeated Hunk hunks = 7;
}

message DiffResult {
  repeated FileChange files = 1;
}

message CompareResult {
  string base = 1;
  string head = 2;
  int32 ahead = 3;   // commits reachable from head but not base
  int32 behind = 4;  // commits reachable from base but not head
  repeated Commit commits = 5;  // base..head, newest first
  DiffResult diff = 6;          // combined file diff base..head
}

message BlameLine {
  string sha = 1;
  string short_sha = 2;
  string author = 3;
  string email = 4;
  google.protobuf.Timestamp when = 5;
  int32 line_no = 6;  // 1-based line number in the blamed file
  string content = 7;
  string summary = 8;  // commit subject line
}

message BlameResult {
  string ref = 1;
  string path = 2;
  repeated BlameLine lines = 3;
}

message Contributor {
  string author = 1;
  string email = 2;
  int32 commits = 3;
  int32 additions = 4;
  int32 deletions = 5;
  int32 total_lines = 6;
}

message RepoStats {
  int32 total_commits = 1;
  int32 total_branches = 2;
  int32 total_tags = 3;
  int64 total_size = 4;  // git object size in bytes (count-objects)
  repeated Contributor contributors = 5;
  google.protobuf.Timestamp first_commit = 6;
  google.protobuf.Timestamp last_commit = 7;
}

message CountObjectsResult {
  int64 count = 1;         // loose objects
  int64 size = 2;          // loose objects size, bytes
  int64 in_pack = 3;       // objects inside packs
  int64 packs = 4;         // number of packs
  int64 size_pack = 5;     // packed objects size, bytes
  int64 garbage = 6;       // garbage objects
  int64 size_garbage = 7;  // garbage size, bytes
}

// MergeResult: exactly one of merge_commit (clean/FF) or conflicts (conflict)
// is meaningful.
message MergeResult {
  string base = 1;
  string head = 2;
  Commit merge_commit = 3;  // nil on conflict; on FF, head's tip
  bool fast_forward = 4;
  repeated string conflicts = 5;  // conflicting paths (merge_commit nil)
}

message FileCommitResult {
  Commit commit = 1;  // the new commit that now tips the branch
}