export type PiProcessErrorCode =
  | 'PI_RPC_PROTOCOL_ERROR'
  | 'PI_RPC_TIMEOUT'
  | 'PI_RPC_ABORTED'
  | 'PI_RPC_RESPONSE_ERROR'
  | 'PI_RPC_WRITE_FAILED'
  | 'PI_RPC_EXITED'
  | 'PI_WORKER_START_FAILED'
  | 'PI_WORKER_STOPPED'
  | 'PI_WORKER_STOP_FAILED';

export type PiProcessErrorDetails = {
  cause?: unknown;
  generation?: number;
  diagnostic?: string;
  exitCode?: number | null;
  signal?: NodeJS.Signals | null;
};

export class PiProcessError extends Error {
  readonly code: PiProcessErrorCode;
  readonly generation?: number;
  readonly diagnostic?: string;
  readonly exitCode?: number | null;
  readonly signal?: NodeJS.Signals | null;

  constructor(
    code: PiProcessErrorCode,
    message: string,
    details: PiProcessErrorDetails = {},
  ) {
    super(message, details.cause === undefined ? undefined : { cause: details.cause });
    this.name = 'PiProcessError';
    this.code = code;
    this.generation = details.generation;
    this.diagnostic = details.diagnostic;
    this.exitCode = details.exitCode;
    this.signal = details.signal;
  }
}

export function isPiProcessError(error: unknown): error is PiProcessError {
  return error instanceof PiProcessError;
}