// Shared message types between main thread and session worker.

export interface InitMessage {
  type: "init";
  sessionId: string;
  cwd: string;
  initialFiles: Record<string, string>;
  capabilities: {
    network: boolean;
    python: boolean;
    javascript: boolean;
  };
  networkConfig?: {
    dangerouslyAllowFullInternetAccess: boolean;
    allowedUrlPrefixes: string[];
    allowedMethods: string[];
  };
  executionLimits: {
    maxCallDepth: number;
    maxCommandCount: number;
    maxLoopIterations: number;
    maxAwkIterations: number;
    maxSedIterations: number;
  };
  maxSessionFsBytes: number;
  maxSingleFileBytes: number;
  maxWriteBatchBytes: number;
  maxReadBytesPerCall: number;
  maxCapturedOutputBytesExec: number;
}

export interface ExecRequest {
  type: "exec";
  requestId: string;
  execId: string;
  script: string;
  stdin?: string;
  cwd?: string;
  env?: Record<string, string>;
  replaceEnv?: boolean;
  timeoutMs: number;
  maxStdoutBytes: number;
  maxStderrBytes: number;
}

export interface AbortRequest {
  type: "abort";
  requestId: string;
}

export interface FilesWriteRequest {
  type: "files_write";
  requestId: string;
  files: Array<{
    path: string;
    content: string;
    encoding: "utf8" | "base64";
  }>;
  overwrite: boolean;
  createDirs: boolean;
}

export interface FilesReadRequest {
  type: "files_read";
  requestId: string;
  path: string;
  offset: number;
  maxBytes: number;
  encoding: "utf8" | "base64" | "auto";
}

export interface FilesListRequest {
  type: "files_list";
  requestId: string;
  path: string;
  recursive: boolean;
  glob?: string;
  maxEntries: number;
  cursor?: string;
}

export interface FsBytesRequest {
  type: "fs_bytes";
  requestId: string;
}

export type ParentMessage =
  | InitMessage
  | ExecRequest
  | AbortRequest
  | FilesWriteRequest
  | FilesReadRequest
  | FilesListRequest
  | FsBytesRequest;

export interface ReadyMessage {
  type: "ready";
}

export interface ExecResult {
  type: "exec_result";
  requestId: string;
  execId: string;
  exitCode: number;
  stdout: string;
  stderr: string;
  durationMs: number;
  timedOut: boolean;
  truncatedStdout: boolean;
  truncatedStderr: boolean;
  // Total captured byte counts for resource link bookkeeping (>= embedded length).
  capturedStdoutBytes: number;
  capturedStderrBytes: number;
  // Optional retained full bytes when above the embed cap (capped by maxCapturedOutputBytesExec).
  retainedStdout?: string;
  retainedStderr?: string;
  commands: string[];
  sessionFsBytes: number;
}

export interface FilesWriteResult {
  type: "files_write_result";
  requestId: string;
  written: Array<{ path: string; bytes: number }>;
  sessionFsBytes: number;
}

export interface FilesReadResult {
  type: "files_read_result";
  requestId: string;
  path: string;
  content: string;
  encoding: "utf8" | "base64";
  bytesRead: number;
  nextOffset: number | null;
}

export interface FilesListEntry {
  path: string;
  type: "file" | "directory" | "symlink";
  bytes?: number;
}

export interface FilesListResult {
  type: "files_list_result";
  requestId: string;
  entries: FilesListEntry[];
  nextCursor: string | null;
}

export interface FsBytesResult {
  type: "fs_bytes_result";
  requestId: string;
  sessionFsBytes: number;
}

export interface ErrorResult {
  type: "error_result";
  requestId: string;
  code: string;
  message: string;
}

export type WorkerMessage =
  | ReadyMessage
  | ExecResult
  | FilesWriteResult
  | FilesReadResult
  | FilesListResult
  | FsBytesResult
  | ErrorResult;