"""Regression: every prompt file loads, render() substitutes placeholders."""

from pathlib import Path

import pytest

from api.prompts import PROMPTS_DIR, load, render

PROMPT_NAMES = sorted(
    p.stem for p in PROMPTS_DIR.iterdir() if p.suffix == ".txt"
)


@pytest.mark.parametrize("name", PROMPT_NAMES)
def test_prompt_loads(name):
    text = load(name)
    assert text  # non-empty


def test_render_substitutes():
    out = render("synthesize.user", question="how many?", findings_block="x: 1")
    assert "how many?" in out
    assert "x: 1" in out
    assert "{question}" not in out and "{findings_block}" not in out


def test_render_unknown_placeholder_raises():
    # str.format raises KeyError on missing keys
    with pytest.raises(KeyError):
        render("synthesize.user", question="q")  # missing findings_block