from __future__ import annotations

from fastapi.testclient import TestClient

from app.main import app

client = TestClient(app)


def test_service_exposes_only_match_endpoint() -> None:
    application_paths = [route.path for route in app.routes]
    assert application_paths == ["/match"]


def test_match_contract_and_message_order() -> None:
    messages = [
        "бур sds 10х210",
        "где находится ваш магазин",
        "нужен кабель",
    ]
    response = client.post("/match", json={"messages": messages})
    assert response.status_code == 200

    body = response.json()
    assert set(body) == {"results"}
    assert [result["message"] for result in body["results"]] == messages
    assert [result["status"] for result in body["results"]] == [
        "matched",
        "not_found",
        "ambiguous",
    ]

    for result in body["results"]:
        assert set(result) == {"message", "status", "candidates"}
        assert len(result["candidates"]) <= 3
        for candidate in result["candidates"]:
            assert set(candidate) == {"sku", "confidence"}
            assert 0.0 <= candidate["confidence"] <= 1.0


def test_empty_message_list_is_valid() -> None:
    response = client.post("/match", json={"messages": []})
    assert response.status_code == 200
    assert response.json() == {"results": []}


def test_unknown_request_fields_are_rejected() -> None:
    response = client.post("/match", json={"messages": [], "debug": True})
    assert response.status_code == 422