"""Tests for registry.batch — the /device/0 sweep parser and its stub marker.

issue #127: a device whose /energy/consumption/vs/0 is permanently
unsupported reports a genuinely empty {} rep for it. The previous parser
collapsed /device/0's own {"href": "..."} "not fetched yet" marker to that
same {} shape, so downstream exists_fn checks couldn't tell "confirmed
empty" apart from "haven't polled it yet" and created phantom always-
"unknown" entities either way. is_stub_rep/parse_device0_batch now keep the
two shapes distinct.
"""
from custom_components.localthings.registry.batch import is_stub_rep, parse_device0_batch


class TestIsStubRep:
    def test_true_for_bare_href_marker(self):
        assert is_stub_rep({'href': '/energy/consumption/vs/0'}) is True

    def test_false_for_genuinely_empty_rep(self):
        assert is_stub_rep({}) is False

    def test_false_for_populated_rep(self):
        assert is_stub_rep({'x.com.samsung.da.cumulativePower': '58900'}) is False

    def test_false_for_href_plus_data(self):
        """A real, populated rep may legitimately echo 'href' alongside
        actual fields -- only a rep with *no other keys* is the stub."""
        assert is_stub_rep({'href': '/x/0', 'value': True}) is False


class TestParseDevice0Batch:
    def test_stub_rep_kept_distinct_from_genuine_empty(self):
        device0 = [
            {},
            {'href': '/energy/consumption/vs/0', 'rep': {'href': '/energy/consumption/vs/0'}},
            {'href': '/sabbath/vs/0', 'rep': {}},
        ]
        resources = parse_device0_batch(device0)
        assert is_stub_rep(resources['/energy/consumption/vs/0']) is True
        assert is_stub_rep(resources['/sabbath/vs/0']) is False
        assert resources['/sabbath/vs/0'] == {}

    def test_populated_rep_passes_through_unchanged(self):
        device0 = [
            {},
            {'href': '/door/cooler/0', 'rep': {'openState': 'Close'}},
        ]
        resources = parse_device0_batch(device0)
        assert resources['/door/cooler/0'] == {'openState': 'Close'}

    def test_skips_entries_without_href(self):
        device0 = [{}, {'rep': {'a': 1}}]
        assert parse_device0_batch(device0) == {}

    def test_skips_non_dict_rep(self):
        device0 = [{}, {'href': '/x/0', 'rep': 'not-a-dict'}]
        assert parse_device0_batch(device0) == {}