"""The public viewing surface (/api/v1/public).

The central guarantee: an ANONYMOUS viewer of a public tree never receives a
possibly-living person's real name, dates, or alternate names — while deceased
people are shown in full. Plus the access matrix for each visibility level.
See docs/design/tree-visibility.md.
"""

from tests.conftest import auth, register

# Distinctive strings so we can assert they never leak anywhere anonymously.
LIVING_GIVEN = "Younglivingsecret"
LIVING_SURNAME = "Hiddensurname"
LIVING_ALIAS = "Secretmaidenalias"
LIVING_BIRTH_YEAR = "2002"


async def _person(client, tid, headers, given, surname, is_living):
    r = await client.post(
        f"/api/v1/trees/{tid}/persons",
        json={"given": given, "surname": surname, "is_living": is_living},
        headers=headers,
    )
    assert r.status_code == 201, r.text
    return r.json()["id"]


async def _build_public_tree(client):
    owner = auth(await register(client, "pv-owner@ex.com"))
    tid = (
        await client.post(
            "/api/v1/trees", json={"name": "Heritage", "visibility": "public"}, headers=owner
        )
    ).json()["id"]

    old = await _person(client, tid, owner, "Olda", "Ancestor", False)
    young = await _person(client, tid, owner, LIVING_GIVEN, LIVING_SURNAME, True)

    # Birth events for each.
    await client.post(
        f"/api/v1/trees/{tid}/events",
        json={"event_type": "birth", "person_id": old, "date_value": "1850"},
        headers=owner,
    )
    await client.post(
        f"/api/v1/trees/{tid}/events",
        json={"event_type": "birth", "person_id": young, "date_value": LIVING_BIRTH_YEAR},
        headers=owner,
    )
    # Alternate names for each.
    await client.post(
        f"/api/v1/trees/{tid}/persons/{old}/names",
        json={"name_type": "alias", "given": "Oldnickname"},
        headers=owner,
    )
    await client.post(
        f"/api/v1/trees/{tid}/persons/{young}/names",
        json={"name_type": "alias", "given": LIVING_ALIAS},
        headers=owner,
    )
    # old --parent--> young
    await client.post(
        f"/api/v1/trees/{tid}/relationships",
        json={
            "type": "parent_child",
            "person_from_id": old,
            "person_to_id": young,
            "qualifier": "biological",
        },
        headers=owner,
    )
    return tid, old, young


async def test_anonymous_public_view_never_leaks_living_pii(client):
    tid, old, young = await _build_public_tree(client)

    # --- persons: deceased full, living redacted ---
    persons = (await client.get(f"/api/v1/public/trees/{tid}/persons")).json()
    by_id = {p["id"]: p for p in persons}
    assert by_id[old]["primary_name"] == "Olda Ancestor"
    assert by_id[young]["primary_name"] == "Living person"
    assert by_id[young]["gender"] is None

    # --- the living person's real name/alias/birth year must appear NOWHERE ---
    for path in (
        f"/api/v1/public/trees/{tid}/persons",
        f"/api/v1/public/trees/{tid}/events",
        f"/api/v1/public/trees/{tid}/relationships",
        f"/api/v1/public/trees/{tid}/persons/{young}",
        f"/api/v1/public/trees/{tid}/persons/{young}/names",
        f"/api/v1/public/trees/{tid}/persons/{young}/events",
    ):
        body = (await client.get(path)).text
        assert LIVING_GIVEN not in body, path
        assert LIVING_SURNAME not in body, path
        assert LIVING_ALIAS not in body, path
        assert LIVING_BIRTH_YEAR not in body, path

    # --- events: deceased's date present, living's dropped entirely ---
    events = (await client.get(f"/api/v1/public/trees/{tid}/events")).json()
    assert any(e["person_id"] == old for e in events)
    assert not any(e["person_id"] == young for e in events)

    # --- per-person endpoints for the living person are emptied/redacted ---
    assert (await client.get(f"/api/v1/public/trees/{tid}/persons/{young}/names")).json() == []
    assert (await client.get(f"/api/v1/public/trees/{tid}/persons/{young}/events")).json() == []
    assert (
        await client.get(f"/api/v1/public/trees/{tid}/persons/{young}")
    ).json()["primary_name"] == "Living person"

    # --- deceased person's names/events ARE exposed ---
    old_names = (await client.get(f"/api/v1/public/trees/{tid}/persons/{old}/names")).json()
    assert any(n.get("given") == "Oldnickname" for n in old_names)
    old_events = (await client.get(f"/api/v1/public/trees/{tid}/persons/{old}/events")).json()
    assert any(e["date_value"] == "1850" for e in old_events)

    # --- relationship kept (links to the redacted person by id, no PII) ---
    rels = (await client.get(f"/api/v1/public/trees/{tid}/relationships")).json()
    assert any(r2["person_from_id"] == old and r2["person_to_id"] == young for r2 in rels)


async def test_private_tree_is_404_anonymously(client):
    owner = auth(await register(client, "priv-owner@ex.com"))
    tid = (
        await client.post(
            "/api/v1/trees", json={"name": "Secret", "visibility": "private"}, headers=owner
        )
    ).json()["id"]
    assert (await client.get(f"/api/v1/public/trees/{tid}")).status_code == 404
    assert (await client.get(f"/api/v1/public/trees/{tid}/persons")).status_code == 404


async def test_unlisted_viewable_by_link_but_not_in_directory(client):
    owner = auth(await register(client, "unl-owner@ex.com"))
    tid = (
        await client.post(
            "/api/v1/trees", json={"name": "ByLinkOnly", "visibility": "unlisted"}, headers=owner
        )
    ).json()["id"]
    # Direct link works anonymously...
    assert (await client.get(f"/api/v1/public/trees/{tid}")).status_code == 200
    # ...but it is never listed in the directory.
    directory = (await client.get("/api/v1/public/trees")).json()
    assert all(t["id"] != tid for t in directory)


async def test_site_members_requires_login(client):
    owner = auth(await register(client, "sm2-owner@ex.com"))
    stranger = auth(await register(client, "sm2-stranger@ex.com"))
    tid = (
        await client.post(
            "/api/v1/trees", json={"name": "MembersOnly", "visibility": "site_members"}, headers=owner
        )
    ).json()["id"]
    assert (await client.get(f"/api/v1/public/trees/{tid}")).status_code == 404  # anonymous
    assert (await client.get(f"/api/v1/public/trees/{tid}", headers=stranger)).status_code == 200


async def test_directory_visibility(client):
    owner = auth(await register(client, "dir-owner@ex.com"))
    stranger = auth(await register(client, "dir-stranger@ex.com"))
    ids = {}
    for vis in ("public", "site_members", "unlisted", "private"):
        ids[vis] = (
            await client.post(
                "/api/v1/trees", json={"name": f"dir-{vis}", "visibility": vis}, headers=owner
            )
        ).json()["id"]

    anon = {t["id"] for t in (await client.get("/api/v1/public/trees")).json()}
    assert ids["public"] in anon
    for vis in ("site_members", "unlisted", "private"):
        assert ids[vis] not in anon

    logged_in = {t["id"] for t in (await client.get("/api/v1/public/trees", headers=stranger)).json()}
    assert ids["public"] in logged_in
    assert ids["site_members"] in logged_in
    assert ids["unlisted"] not in logged_in
    assert ids["private"] not in logged_in