"""Unit tests for _parse_custom_fields — no DB or HTTP needed."""
import json

from web.routes.evotor_webhooks import _parse_custom_fields


def test_none_returns_empty():
    assert _parse_custom_fields(None) == {}


def test_dict_passthrough():
    d = {"email": "a@b.com", "phone": "+79001234567"}
    assert _parse_custom_fields(d) == d


def test_json_string_parsed():
    raw = json.dumps({"email": "a@b.com", "firstName": "Иван"})
    result = _parse_custom_fields(raw)
    assert result["email"] == "a@b.com"
    assert result["firstName"] == "Иван"


def test_plain_string_returns_empty():
    # A plain non-JSON string cannot be parsed into fields
    assert _parse_custom_fields("just some text") == {}


def test_json_array_returns_empty():
    # A JSON array is not a dict — treat as unparseable
    assert _parse_custom_fields("[1, 2, 3]") == {}


def test_empty_string_returns_empty():
    assert _parse_custom_fields("") == {}


def test_nested_values_preserved():
    raw = {"email": "x@y.com", "meta": {"key": "val"}}
    result = _parse_custom_fields(raw)
    assert result["meta"]["key"] == "val"