from pathlib import Path
import sys

sys.path.append(str(Path(__file__).resolve().parents[1]))

from _chapter2_config import as_text, get_chat_model, print_dependency_hint


try:
    from langchain_core.prompts import ChatPromptTemplate
except ModuleNotFoundError as exc:
    print_dependency_hint(exc)
    raise SystemExit(1)


def main() -> None:
    try:
        model = get_chat_model(temperature=0)
    except ModuleNotFoundError as exc:
        print_dependency_hint(exc)
        raise SystemExit(1)

    template_str = "帮我讲个关于{name}笑话吧"
    prompt_template = ChatPromptTemplate.from_template(template_str)
    prompt = prompt_template.format_messages(name="气球")
    print(f"prompt-->{prompt}")

    result = model.invoke(prompt)
    print(f"result-->{as_text(result)}")


if __name__ == "__main__":
    main()