"""Suite B — Buy Book button & response formatter (P0)."""

import pytest

from app.services.formatter import ResponseFormatter


@pytest.fixture
def formatter():
    return ResponseFormatter()


@pytest.mark.p0
def test_purchase_link_rendered_with_buy_book_label(formatter):
    result = formatter.format(
        response_text="Great question about the plot.",
        purchase_url="https://store.example.com/book",
        show_link=True,
    )
    assert result["has_links"] is True
    assert len(result["links"]) == 1
    assert result["links"][0]["label"] == "Buy Book"
    assert result["links"][0]["type"] == "purchase"
    assert result["links"][0]["url"] == "https://store.example.com/book"


@pytest.mark.p0
def test_no_links_when_show_link_false(formatter):
    result = formatter.format(
        response_text="Just an answer.",
        purchase_url="https://store.example.com/book",
        show_link=False,
    )
    assert result["has_links"] is False
    assert result["links"] == []


@pytest.mark.p0
def test_max_two_links_purchase_and_preview(formatter):
    result = formatter.format(
        response_text="Check it out.",
        purchase_url="https://store.example.com/buy",
        preview_url="https://store.example.com/preview",
        show_link=True,
    )
    assert len(result["links"]) == 2
    types = {link["type"] for link in result["links"]}
    assert types == {"purchase", "preview"}


@pytest.mark.p0
def test_no_link_when_purchase_url_missing(formatter):
    result = formatter.format(
        response_text="Answer without URL.",
        purchase_url=None,
        show_link=True,
    )
    assert result["has_links"] is False


@pytest.mark.p0
def test_markdown_stripped_from_response(formatter):
    result = formatter.format(response_text="This is **bold** text.", show_link=False)
    assert "**" not in result["text"]
    assert "bold" in result["text"]