"""Approximate-location fallback, frontend side.

Two things are worth locking down here, and both are about honesty rather than
mechanics: the server-rendered HTML must not vary by visitor (so no shared
cache can leak one person's city to another), and the privacy page's factual
claim about IP lookups must track the flag that decides whether they happen.
"""
import content

B = "/thermograph"


def test_home_ships_an_empty_hidden_container(client):
    """The suggestion is fetched client-side. If it were ever server-rendered
    into the homepage, that page's HTML — and its ETag — would vary per
    visitor, which is exactly the cache-poisoning shape this design avoids."""
    r = client.get(f"{B}/")
    assert r.status_code == 200
    assert 'id="geo-approx"' in r.text
    assert "hidden" in r.text.split('id="geo-approx"')[1].split(">")[0]


def test_home_html_is_identical_regardless_of_client_address(client):
    """Same bytes, same ETag, whatever the request claims about where it came
    from — the property that lets the homepage stay cacheable."""
    a = client.get(f"{B}/", headers={"X-Forwarded-For": "8.8.8.8"})
    b = client.get(f"{B}/", headers={"X-Forwarded-For": "1.1.1.1"})
    assert a.text == b.text
    assert a.headers["etag"] == b.headers["etag"]


def test_privacy_says_no_ip_lookup_while_the_flag_is_off(client, monkeypatch):
    monkeypatch.delenv("THERMOGRAPH_GEOIP", raising=False)
    r = client.get(f"{B}/privacy")
    assert r.status_code == 200
    assert "never looks up your location from your IP address" in r.text


def test_privacy_describes_the_fallback_when_the_flag_is_on(client, monkeypatch):
    """Turning the feature on must not leave a published claim behind that is
    no longer true."""
    monkeypatch.setenv("THERMOGRAPH_GEOIP", "1")
    r = client.get(f"{B}/privacy")
    assert r.status_code == 200
    assert "never looks up your location from your IP address" not in r.text
    assert "rough guess" in r.text
    assert "not stored" in r.text


def test_geoip_enabled_reads_the_shared_flag(monkeypatch):
    monkeypatch.delenv("THERMOGRAPH_GEOIP", raising=False)
    assert content.geoip_enabled() is False
    for on in ("1", "true", "YES", "on"):
        monkeypatch.setenv("THERMOGRAPH_GEOIP", on)
        assert content.geoip_enabled() is True, on
    for off in ("0", "", "no", "maybe"):
        monkeypatch.setenv("THERMOGRAPH_GEOIP", off)
        assert content.geoip_enabled() is False, off