// Diff state protocol messages for communication between
// the Warp client and the remote server binary.
//
// These messages are used by the diff state subsystem to synchronize
// code review diff data between a remote daemon and the Warp client.

syntax = "proto3";

package remote_server;

// ── Diff state sub-messages ───────────────────────────────────────
// Mirror the Rust domain types in code_review/diff_state.rs.

// Mirrors DiffMode in Rust.
message DiffMode {
  oneof mode {
    DiffModeHead head = 1;
    DiffModeMainBranch main_branch = 2;
    DiffModeOtherBranch other_branch = 3;
  }
}
message DiffModeHead {}
message DiffModeMainBranch {}
message DiffModeOtherBranch {
  string branch_name = 1;
}

// Mirrors DiffState in Rust. After the wrapper split (§1), Loaded is a
// unit variant — the diff payload is carried separately in
// DiffStateSnapshot.diffs.
message DiffState {
  oneof state {
    DiffStateNotInRepository not_in_repository = 1;
    DiffStateLoading loading = 2;
    DiffStateErrorValue error = 3;
    DiffStateLoaded loaded = 4;
  }
}
message DiffStateNotInRepository {}
message DiffStateLoading {}
message DiffStateErrorValue {
  string message = 1;
}
message DiffStateLoaded {}

// Mirrors DiffLineType in Rust.
enum DiffLineType {
  DIFF_LINE_TYPE_UNSPECIFIED = 0;
  DIFF_LINE_TYPE_CONTEXT = 1;
  DIFF_LINE_TYPE_ADD = 2;
  DIFF_LINE_TYPE_DELETE = 3;
  DIFF_LINE_TYPE_HUNK_HEADER = 4;
}

// Represents a single line in a diff hunk, as rendered by `git diff`. Mirrors DiffLine in Rust.
message DiffLine {
  DiffLineType line_type = 1;
  optional uint64 old_line_number = 2;
  optional uint64 new_line_number = 3;
  string text = 4;
  bool no_trailing_newline = 5;
}

// Represents a hunk of changes in a file diff, as rendered by `git diff`. Mirrors DiffHunk in Rust.
message DiffHunk {
  uint64 old_start_line = 1;
  uint64 old_line_count = 2;
  uint64 new_start_line = 3;
  uint64 new_line_count = 4;
  repeated DiffLine lines = 5;
  uint64 unified_diff_start = 6;
  uint64 unified_diff_end = 7;
}

// Represents the status of a file in the git working directory. Mirrors GitFileStatus in Rust.
message GitFileStatus {
  oneof status {
    GitFileStatusNew new_file = 1;
    GitFileStatusModified modified = 2;
    GitFileStatusDeleted deleted = 3;
    GitFileStatusRenamed renamed = 4;
    GitFileStatusCopied copied = 5;
    GitFileStatusUntracked untracked = 6;
    GitFileStatusConflicted conflicted = 7;
  }
}
message GitFileStatusNew {}
message GitFileStatusModified {}
message GitFileStatusDeleted {}
message GitFileStatusRenamed {
  string old_path = 1;
}
message GitFileStatusCopied {
  string old_path = 1;
}
message GitFileStatusUntracked {}
message GitFileStatusConflicted {}

// Mirrors DiffSize in Rust (diff_size_limits.rs).
enum DiffSize {
  DIFF_SIZE_UNSPECIFIED = 0;
  DIFF_SIZE_NORMAL = 1;
  DIFF_SIZE_LARGE = 2;
  // The diff/patch itself is too large to render. (Was DIFF_SIZE_UNRENDERABLE;
  // value 3 is preserved for wire compatibility.)
  DIFF_SIZE_UNRENDERABLE_DIFF_TOO_LARGE = 3;
  // The base file content was withheld because it exceeded the per-file wire
  // budget; the client renders a "file too large" placeholder.
  DIFF_SIZE_UNRENDERABLE_FILE_TOO_LARGE = 4;
}

// Mirrors FileDiff + FileDiffAndContent in Rust.
// The two types are collapsed into a single message with an optional content_at_base field,
// since every wire context that sends a FileDiff also needs base content for editor rendering.
message FileDiff {
  string file_path = 1;
  GitFileStatus status = 2;
  repeated DiffHunk hunks = 3;
  bool is_binary = 4;
  bool is_autogenerated = 5;
  uint64 max_line_number = 6;
  bool has_hidden_bidi_chars = 7;
  DiffSize size = 8;
  // File content at HEAD or merge-base, used by the code review editor to
  // render inline diff decorations (set_base). Absent for binary files, for
  // files whose content exceeds the per-file wire budget (size =
  // DIFF_SIZE_UNRENDERABLE_FILE_TOO_LARGE), or when git show fails.
  optional string content_at_base = 9;
}

// Represents the complete git diff information for a repository. Mirrors GitDiffData in Rust.
message GitDiffData {
  repeated FileDiff files = 1;
  uint64 total_additions = 2;
  uint64 total_deletions = 3;
  uint64 files_changed = 4;
}

// Mirrors DiffStats in Rust.
message DiffStats {
  uint64 files_changed = 1;
  uint64 total_additions = 2;
  uint64 total_deletions = 3;
}

// Mirrors DiffMetadataAgainstBase in Rust.
message DiffMetadataAgainstBase {
  DiffStats aggregate_stats = 1;
  // Per-file change entries for this base, captured from the same numstat that
  // produces aggregate_stats so the git dialog's Changes box can render
  // without a working-tree read (lets the box populate for remote repos).
  repeated FileChangeEntry files = 2;
}

// Mirrors Commit in Rust (util/git.rs).
message Commit {
  string hash = 1;
  string subject = 2;
  uint64 files_changed = 3;
  uint64 additions = 4;
  uint64 deletions = 5;
  // Per-file changes in this commit, captured up front so the push dialog can
  // render a commit's file list on expansion without a follow-up RPC.
  repeated FileChangeEntry files = 6;
}

// Mirrors FileChangeEntry in Rust (util/git.rs).
message FileChangeEntry {
  string path = 1;
  uint64 additions = 2;
  uint64 deletions = 3;
}

// Mirrors PrInfo in Rust (util/git.rs).
message PrInfo {
  uint64 number = 1;
  string url = 2;
  string state = 3;
  bool draft = 4;
  string base_branch = 5;
}

// Mirrors DiffMetadata in Rust.
message DiffMetadata {
  string main_branch_name = 1;
  string current_branch_name = 2;
  DiffMetadataAgainstBase against_head = 3;
  optional DiffMetadataAgainstBase against_base_branch = 4;
  bool has_head_commit = 5;
  repeated Commit unpushed_commits = 6;
  optional string upstream_ref = 7;
}

// Mirrors FileStatusInfo in Rust. Identifies a file and its git status
// for discard operations (git restore / git stash / git rm).
message FileStatusInfo {
  string path = 1;
  GitFileStatus status = 2;
}

// ── Diff state client → server ────────────────────────────────────

// Client → server: subscribe to diff state for a (repo, mode) pair.
// The server responds with GetDiffStateResponse, then pushes subsequent changes.
message GetDiffState {
  string repo_path = 1;
  DiffMode mode = 2;
}

// Client → server: unsubscribe from diff state updates for a (repo, mode) pair.
// Fire-and-forget — the server does not send a response.
message UnsubscribeDiffState {
  string repo_path = 1;
  DiffMode mode = 2;
}

// Client → server: discard changes for one or more files.
// Runs git restore/stash/rm on the remote filesystem.
message DiscardFilesRequest {
  string repo_path = 1;
  repeated FileStatusInfo files = 2;
  bool should_stash = 3;
  // Branch to restore against. Absent means HEAD.
  optional string branch_name = 4;
  // The diff mode identifying which DiffStateModel to use.
  DiffMode mode = 5;
}

// ── Diff state server → client ────────────────────────────────────

// Error payload for GetDiffStateResponse.
message DiffStateError {
  string message = 1;
}

// Full diff state snapshot for a (repo, mode) pair.
// Pushed on structural changes (NewDiffsComputed events).
message DiffStateSnapshot {
  string repo_path = 1;
  DiffMode mode = 2;
  DiffMetadata metadata = 3;
  DiffState state = 4;
  // Present when state is Loaded.
  optional GitDiffData diffs = 5;
}

// Response to GetDiffState.
message GetDiffStateResponse {
  oneof result {
    DiffStateSnapshot snapshot = 1;
    DiffStateError error = 2;
  }
}

// Metadata-only update pushed for MetadataRefreshed and
// CurrentBranchChanged events. Avoids re-serializing the entire diff
// payload on every throttled refresh.
message DiffStateMetadataUpdate {
  string repo_path = 1;
  DiffMode mode = 2;
  DiffMetadata metadata = 3;
}

// Single-file diff delta pushed for SingleFileUpdated events.
// Carries one FileDiff + file path + updated metadata.
// Debounced at 2s on the server.
message DiffStateFileDelta {
  string repo_path = 1;
  DiffMode mode = 2;
  string file_path = 3;
  optional FileDiff diff = 4;
  optional DiffMetadata metadata = 5;
}

// Server → client: result of a DiscardFilesRequest.
message DiscardFilesResponse {
  oneof result {
    DiscardFilesSuccess success = 1;
    DiscardFilesError error = 2;
  }
}

message DiscardFilesSuccess {}

message DiscardFilesError {
  string message = 1;
}

// ── Branch listing ────────────────────────────────────────────────

// Client → server: list branches for a repository.
message GetBranches {
  string repo_path = 1;
  // Maximum number of branches to return. Absent = server default (100).
  optional uint32 max_branch_count = 2;
  // Whether to include remote-tracking branches (refs/remotes).
  bool include_remotes = 3;
}

// A single branch entry.
message BranchInfo {
  string name = 1;
  bool is_main = 2;
}

// Server → client: result of a GetBranches request.
message GetBranchesResponse {
  oneof result {
    GetBranchesSuccess success = 1;
    GetBranchesError error = 2;
  }
}

message GetBranchesSuccess {
  repeated BranchInfo branches = 1;
}

message GetBranchesError {
  string message = 1;
}

// ── Git operations (commit / push / create-PR) ────────────────────
// Run git / gh on the remote filesystem. These mirror the local code
// review git dialog operations in app/src/code_review/git_dialog/*.

// Shared error payload for git operation responses. The message is the
// raw git/gh error, mapped to user-facing copy on the client.
message GitOpError {
  string message = 1;
}

// Post-operation delta applied to DiffMetadata so the client refreshes the
// header immediately, without waiting for the next watcher-driven snapshot.
message GitOpDelta {
  repeated Commit unpushed_commits = 1;
  optional string upstream_ref = 2;
}

// Client → server: run the commit chain (commit, then optionally push, then
// optionally create-PR) host-local in a single round trip. The daemon
// sequences the underlying git / gh subprocesses (see handle_git_commit_chain), so
// the SSH link carries one request/response instead of the 2–3 a client-side
// chain would send.
message GitCommitChainRequest {
  string repo_path = 1;
  string message = 2;
  bool include_unstaged = 3;
  // Branch to push / open the PR against. Ignored for COMMIT_ONLY.
  string branch = 4;
  GitCommitChainMode mode = 5;
  // When mode is COMMIT_AND_CREATE_PR, generate the PR title/body via AI on the
  // daemon (get_diff_for_pr + generate_code_review_content), falling back to
  // `gh pr create --fill`. Ignored for the other modes.
  bool autogenerate_pr_content = 6;
}

// What to run after the commit succeeds.
enum GitCommitChainMode {
  GIT_COMMIT_CHAIN_MODE_COMMIT_ONLY = 0;
  GIT_COMMIT_CHAIN_MODE_COMMIT_AND_PUSH = 1;
  GIT_COMMIT_CHAIN_MODE_COMMIT_AND_CREATE_PR = 2;
}

message GitCommitChainResponse {
  oneof result {
    GitCommitChainSuccess success = 1;
    GitOpError error = 2;
  }
}

// Final post-chain delta plus the PR when one was created (absent for
// COMMIT_ONLY / COMMIT_AND_PUSH).
message GitCommitChainSuccess {
  GitOpDelta delta = 1;
  optional PrInfo pr_info = 2;
}

// Client → server: push `branch` to origin, setting upstream tracking.
message GitPushRequest {
  string repo_path = 1;
  string branch = 2;
}

message GitPushResponse {
  oneof result {
    GitOpDelta success = 1;
    GitOpError error = 2;
  }
}

// Client → server: create a PR for the current branch (must be pushed).
// Absent title/body => `gh pr create --fill`, unless autogenerate_content is
// set (then the daemon generates the title/body via AI first).
message GitCreatePrRequest {
  string repo_path = 1;
  // Current branch name, passed as context to daemon-side AI generation.
  string branch = 2;
  // When true and title/body are both absent, the daemon generates the PR
  // title + body via AI (get_diff_for_pr + generate_code_review_content)
  // before running `gh pr create`, falling back to `--fill` on failure.
  bool autogenerate_content = 3;
}

message GitCreatePrResponse {
  oneof result {
    PrInfo success = 1;
    GitOpError error = 2;
  }
}


// Client → server: list the committed file changes for the current branch's
// PR-ready diff (merge_base(HEAD, main)..HEAD). Backs the Create PR dialog's
// Changes box; deliberately committed-only (no working-tree edits, no
// untracked files) so it matches what `gh pr create` would include.
message GitGetCommittedBranchFilesRequest {
  string repo_path = 1;
}

message GitGetCommittedBranchFilesResponse {
  oneof result {
    GitGetCommittedBranchFilesSuccess success = 1;
    GitOpError error = 2;
  }
}

message GitGetCommittedBranchFilesSuccess {
  repeated FileChangeEntry files = 1;
}

// Client → server: generate a commit message via AI on the remote host.
// The daemon computes the working-tree diff locally and calls the Warp
// server's code-review content endpoint, returning the message string. Sent
// at commit-dialog open time, mirroring the local open-time autogen.
message GitGenerateCommitMessageRequest {
  string repo_path = 1;
  // Whether to include unstaged changes in the diff sent to AI (mirrors the
  // commit dialog's include-unstaged toggle).
  bool include_unstaged = 2;
  // Current branch name, passed as context to the AI request.
  string branch_name = 3;
}

message GitGenerateCommitMessageResponse {
  oneof result {
    // The generated commit message (already trimmed, non-empty).
    string message = 1;
    GitOpError error = 2;
  }
}

// ── Git and GitHub info ──────────────────────────────────────────────────

// Mirrors RepositoryInfo in Rust (util/git.rs). Returned by `gh repo view`.
message RepositoryInfo {
  string name = 1;
  optional string owner = 2;
}

// Mirrors GitStatusMetadata in Rust (code_review/git_repo_model/mod.rs).
message GitStatusMetadata {
  string current_branch_name = 1;
  string main_branch_name = 2;
  DiffStats stats_against_head = 3;
  optional string tracking_upstream = 4;
  uint32 tracking_ahead = 5;
  uint32 tracking_behind = 6;
  bool tracking_counts_available = 7;
}

// Server -> client push: aggregate git status for a repo. Sent on every
// watcher tick, opportunistically after navigation resolves a git root, and
// when a client requests a current snapshot.
message GitStatusPush {
  string repo_path = 1;
  GitStatusMetadata metadata = 2;
}

// Client -> server notification: ask the daemon to create the per-repo git
// status model if needed and push the current GitStatusPush snapshot when
// available. Fire-and-forget; no response is sent.
message UpdateGitStatus {
  string repo_path = 1;
}

// Server -> client push: PR info for a repo's current branch. Sent when the
// daemon's `GitHubRepoModel` recomputes PR info.
message GitHubPrInfoPush {
  string repo_path = 1;
  optional PrInfo pr_info = 2;
}
// Server -> client push: repository name/owner info for a repo. Sent when the
// daemon's `GitHubRepoModel` recomputes repository info.
message GitHubRepositoryInfoPush {
  string repo_path = 1;
  optional RepositoryInfo repository_info = 2;
}
// Client -> server notification: ask the daemon to create the per-repo
// GitHubRepoModel if needed and refresh PR info for the current branch. The
// result is delivered as a `GitHubPrInfoPush` broadcast (single source of
// truth: the daemon's `GitHubRepoModel`). Fire-and-forget; no response.
message UpdateGitHubPrInfo {
  string repo_path = 1;
}
// Client -> server notification: ask the daemon to create the per-repo
// GitHubRepoModel if needed and refresh repository name/owner. The result is
// delivered as a `GitHubRepositoryInfoPush` broadcast. Fire-and-forget; no
// response.
message UpdateGitHubRepoInfo {
  string repo_path = 1;
}