from app.agents.d3.engine import D3Engine
from app.agents.d3.router import D3Selection
from app.agents.d3.registry import TEMPLATES
from app.agents.d3 import templates  # noqa: F401


class _Router:
    def __init__(self, sel): self._sel = sel
    def select(self, *a, **k): return self._sel


class _Extractor:
    def __init__(self, out): self._out = out
    def fill(self, *a, **k): return self._out


def test_engine_renders_d3_payload():
    t = TEMPLATES["bar_chart"]
    eng = D3Engine(router=_Router(D3Selection(template_id="bar_chart")),
                   extractor=_Extractor(t.golden_sample))
    out = eng.generate("GDP", [{"source": "s", "text": "US 21"}], "graduate")
    assert out.animation_type == "graph" and "__DATA__" not in out.html_code


def test_engine_never_declines_even_with_unrelated_source():
    t = TEMPLATES["bar_chart"]
    eng = D3Engine(router=_Router(D3Selection(template_id="bar_chart")),
                   extractor=_Extractor(t.golden_sample))
    out = eng.generate("justice", [{"source": "s", "text": "philosophy, unrelated to any chart"}], "graduate")
    assert out.animation_type == "graph"