export interface ParsedArgs {
  command: string;
  positional: string[];
  flags: Record<string, string | true>;
}

export function parseArgs(argv: string[]): ParsedArgs {
  if (argv.length === 0) return { command: "help", positional: [], flags: {} };
  const [command, ...rest] = argv;
  const positional: string[] = [];
  const flags: Record<string, string | true> = {};
  for (let i = 0; i < rest.length; i++) {
    const a = rest[i]!;
    if (a.startsWith("--")) {
      const eqIdx = a.indexOf("=", 2);
      if (eqIdx !== -1) {
        flags[a.slice(2, eqIdx)] = a.slice(eqIdx + 1);
      } else {
        const key = a.slice(2);
        const next = rest[i + 1];
        if (next === undefined || next.startsWith("--")) {
          flags[key] = true;
        } else {
          flags[key] = next;
          i++;
        }
      }
    } else {
      positional.push(a);
    }
  }
  return { command: command!, positional, flags };
}