"""Tests for circuitforge_core.preferences path utilities."""
import pytest
from circuitforge_core.preferences import get_path, set_path


class TestGetPath:
    def test_top_level_key(self):
        assert get_path({"a": 1}, "a") == 1

    def test_nested_key(self):
        data = {"affiliate": {"opt_out": False}}
        assert get_path(data, "affiliate.opt_out") is False

    def test_deeply_nested(self):
        data = {"affiliate": {"byok_ids": {"ebay": "my-tag"}}}
        assert get_path(data, "affiliate.byok_ids.ebay") == "my-tag"

    def test_missing_key_returns_default(self):
        assert get_path({}, "missing", default="x") == "x"

    def test_missing_nested_returns_default(self):
        assert get_path({"a": {}}, "a.b.c", default=42) == 42

    def test_default_is_none_when_omitted(self):
        assert get_path({}, "nope") is None

    def test_non_dict_intermediate_returns_default(self):
        assert get_path({"a": "string"}, "a.b", default="d") == "d"


class TestSetPath:
    def test_top_level_key(self):
        result = set_path({}, "opt_out", True)
        assert result == {"opt_out": True}

    def test_nested_key_created(self):
        result = set_path({}, "affiliate.opt_out", True)
        assert result == {"affiliate": {"opt_out": True}}

    def test_deeply_nested(self):
        result = set_path({}, "affiliate.byok_ids.ebay", "my-tag")
        assert result == {"affiliate": {"byok_ids": {"ebay": "my-tag"}}}

    def test_preserves_sibling_keys(self):
        data = {"affiliate": {"opt_out": False, "byok_ids": {}}}
        result = set_path(data, "affiliate.opt_out", True)
        assert result["affiliate"]["opt_out"] is True
        assert result["affiliate"]["byok_ids"] == {}

    def test_preserves_unrelated_top_level_keys(self):
        data = {"other": "value", "affiliate": {"opt_out": False}}
        result = set_path(data, "affiliate.opt_out", True)
        assert result["other"] == "value"

    def test_does_not_mutate_original(self):
        data = {"affiliate": {"opt_out": False}}
        set_path(data, "affiliate.opt_out", True)
        assert data["affiliate"]["opt_out"] is False

    def test_overwrites_existing_value(self):
        data = {"affiliate": {"byok_ids": {"ebay": "old-tag"}}}
        result = set_path(data, "affiliate.byok_ids.ebay", "new-tag")
        assert result["affiliate"]["byok_ids"]["ebay"] == "new-tag"

    def test_non_dict_intermediate_replaced(self):
        data = {"affiliate": "not-a-dict"}
        result = set_path(data, "affiliate.opt_out", True)
        assert result == {"affiliate": {"opt_out": True}}

    def test_roundtrip_get_after_set(self):
        prefs = {}
        prefs = set_path(prefs, "affiliate.opt_out", True)
        prefs = set_path(prefs, "affiliate.byok_ids.ebay", "tag-123")
        assert get_path(prefs, "affiliate.opt_out") is True
        assert get_path(prefs, "affiliate.byok_ids.ebay") == "tag-123"