/**
 * Resolve the `claude` binary for PTY sessions. Moved from claude-pty-runner.ts.
 * Import through test/helpers/claude-pty-runner.ts from tests; pty/ modules import siblings directly.
 */
import * as fs from 'node:fs';

/** Find claude on PATH, with fallback locations. Mirrors terminal-agent.ts. */
export function resolveClaudeBinary(): string | null {
  const override = process.env.BROWSE_TERMINAL_BINARY;
  if (override && fs.existsSync(override)) return override;
  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  const which = (Bun as any).which?.('claude');
  if (which) return which;
  const candidates = [
    '/opt/homebrew/bin/claude',
    '/usr/local/bin/claude',
    `${process.env.HOME}/.local/bin/claude`,
    `${process.env.HOME}/.bun/bin/claude`,
    `${process.env.HOME}/.npm-global/bin/claude`,
  ];
  for (const c of candidates) {
    try {
      fs.accessSync(c, fs.constants.X_OK);
      return c;
    } catch {
      /* keep searching */
    }
  }
  return null;
}