"""segments_from_llm_response：与客户端 split 规则对齐的单元校验。"""

from app.agents.chat.reply_limits import (
    nonempty_segments_or_fallback,
    segments_from_llm_response,
    strip_markdown_for_chat,
)


def test_split_marker():
    assert segments_from_llm_response("a[SPLIT]b", max_segments=3) == ["a", "b"]


def test_paragraph_fallback_when_no_marker():
    a = "太为你高兴了！在上海大剧院的舞台绽放，聚光灯下的你。"
    b = "说到舞台，我忽然想起你黄浦江边的童年。从看着江水流淌，到在舞台上演绎别人的悲欢。"
    assert segments_from_llm_response(f"{a}\n\n{b}", max_segments=3) == [a, b]


def test_short_paragraphs_not_split():
    t = "a\n\nb"
    assert segments_from_llm_response(t, max_segments=3) == [t]


def test_nonempty_fallback_when_all_blank():
    assert nonempty_segments_or_fallback(["", "  "], fallback="ok") == ["ok"]


def test_split_marker_strips_markdown():
    assert segments_from_llm_response("**A**[SPLIT]_B_", max_segments=3) == ["A", "B"]


def test_paragraph_split_strips_markdown():
    a = "**太为你高兴了！在上海大剧院的舞台绽放，聚光灯下的你。**"
    b = "[详情](https://e.com)说到舞台，我忽然想起你黄浦江边的童年。"
    assert segments_from_llm_response(f"{a}\n\n{b}", max_segments=3) == [
        "太为你高兴了！在上海大剧院的舞台绽放，聚光灯下的你。",
        "详情说到舞台，我忽然想起你黄浦江边的童年。",
    ]


def test_strip_markdown_for_chat_preserves_split_token():
    assert "[SPLIT]" in strip_markdown_for_chat("a **b** [SPLIT] c")