"""筛选：判断帖子是否值得提取为创作知识。"""
from __future__ import annotations

from typing import Optional

from creation_knowledge.integrations.llm import ChatFn, default_chat
from creation_knowledge.jsonio import to_bool
from creation_knowledge.models import ExtractedContent, Post, ScreeningResult
from creation_knowledge.prompts import load_prompt
from creation_knowledge.stages._common import content_for_llm

SYSTEM = "你是严谨的创作知识筛选器，只认能指导内容创作的知识，作品本身不算。"


def screen_post(
    post: Post,
    content: ExtractedContent,
    *,
    chat: Optional[ChatFn] = None,
    env_file: str = ".env",
) -> ScreeningResult:
    chat = chat or default_chat(env_file)
    user = load_prompt("screen").format(
        title=post.title or "(无)",
        topics="、".join(post.topic_list) or "(无)",
        content=content_for_llm(post, content) or "(空)",
    )
    data = chat(SYSTEM, user)
    return ScreeningResult(
        passed=to_bool(data.get("passed")),
        score=int(data.get("score") or 0),
        reason=str(data.get("reason") or ""),
    )