"""Simple REPL for SLS skeleton."""

from .lexer import Lexer
from .parser import Parser
from .interpreter import Interpreter


def repl_loop():
    interp = Interpreter()
    print("sls-python REPL (very minimal). Type 'quit' or Ctrl-D to exit.")
    try:
        while True:
            src = input("sls> ")
            if not src or src.strip() in ("quit", "exit"):
                break
            # minimal echo behaviour for now
            lexer = Lexer(src)
            tokens = list(lexer.tokenize())
            ast = Parser(tokens).parse()
            result = interp.eval(ast)
            if result is not None:
                print(result)
    except (EOFError, KeyboardInterrupt):
        print()
        print("Bye")