from llama_index.core import get_response_synthesizer
from llama_index.core.llms import MockLLM
from llama_index.core.schema import NodeWithScore, TextNode


nodes = [
    NodeWithScore(
        node=TextNode(text="Refund requests are handled by the support portal."),
        score=1.0,
    )
]

response_synthesizer = get_response_synthesizer(
    response_mode="compact",
    llm=MockLLM(max_tokens=None),
)
response = response_synthesizer.synthesize(
    "Where are refund requests handled?",
    nodes=nodes,
)

print(f"response_synthesizer={type(response_synthesizer).__name__}")
print(f"contains_context={'support portal' in str(response)}")
print(f"source_count={len(response.source_nodes)}")