from decimal import Decimal
from uuid import uuid4

from data_layer.food_knowledge import (
    BUNDLE_FORMAT,
    _jsonable,
    parse_food_knowledge_bundle,
    portable_mapping,
)


def test_parse_rejects_unknown_format():
    try:
        parse_food_knowledge_bundle({"format": "other", "version": 1})
    except ValueError as e:
        assert "Mitai-Zuordnungsdatei" in str(e)
    else:
        raise AssertionError("expected ValueError")


def test_parse_accepts_bundle():
    data = parse_food_knowledge_bundle({
        "format": BUNDLE_FORMAT,
        "version": 1,
        "mappings": [],
        "recipes": [],
    })
    assert data["version"] == 1


def test_portable_mapping_drops_ids():
    row = portable_mapping({
        "id": 99,
        "food_id": "uuid-here",
        "source_system": "fddb",
        "source_name_raw": "Haferflocken, Großblatt",
        "source_name_normalized": "haferflocken großblatt",
        "bls_code": "C131000",
        "food_name_de": "Hafer roh",
        "catalog_kind": "official_bls",
        "external_key": None,
    })
    assert "id" not in row
    assert "food_id" not in row
    assert row["bls_code"] == "C131000"
    assert row["source_name_raw"] == "Haferflocken, Großblatt"


def test_jsonable_export_types():
    payload = _jsonable({
        "grams": Decimal("1.50"),
        "id": uuid4(),
        "nested": [Decimal("2")],
    })
    assert isinstance(payload["grams"], float)
    assert isinstance(payload["id"], str)
    assert payload["nested"] == [2.0]