"""
A series has a director credit in the detail modal too.

`media_meta_resp.director` was filled from the credits crew's `job ==
"Director"`, which is a movie shape. TMDB's aggregate `tv_credits` crew is
routinely empty and never carries that job, so every show answered with
`director: null` and the detail modal simply dropped the line — reported as
"I can't see the director of a series".

What TMDB models for a show, and what its own page shows, is `created_by` on
the show details. Several creators is ordinary, so they join into one line.
"""

import pytest

from meshbay_node.transport.webrtc_server import WebRTCPeerSession

pytestmark = pytest.mark.asyncio


class FakeTmdbClient:
    """Details and credits, with no language fallback to get in the way."""

    def __init__(self, details: dict, credits: dict | None = None):
        self._details = details
        self._credits = credits or {"cast": [], "crew": []}

    async def movie_details(self, tmdb_id, language=None):
        return self._details

    async def tv_details(self, tmdb_id, language=None):
        return self._details

    async def movie_credits(self, tmdb_id):
        return self._credits

    async def tv_credits(self, tmdb_id):
        return self._credits


def _details(**extra):
    """Enough fields that the English per-field fallback never fires."""
    return {"name": "Some Show", "overview": "A synopsis.",
            "poster_path": "/p.jpg", "genres": [{"name": "Drama"}],
            "first_air_date": "1993-09-10", **extra}


async def test_a_show_reports_its_creator_as_the_director():
    client = FakeTmdbClient(_details(created_by=[{"name": "A Creator"}]))

    meta = await WebRTCPeerSession._tmdb_build_meta(client, "4087", "tv", {"id": 4087})

    assert meta["director"] == "A Creator"


async def test_several_creators_read_as_one_line():
    client = FakeTmdbClient(_details(
        created_by=[{"name": "A Creator"}, {"name": "Another Creator"}]))

    meta = await WebRTCPeerSession._tmdb_build_meta(client, "4087", "tv", {"id": 4087})

    assert meta["director"] == "A Creator, Another Creator"


@pytest.mark.parametrize("created_by", [None, [], [{"name": ""}], [{}]])
async def test_a_show_with_no_creator_credit_stays_none(created_by):
    """None, not "" — the modal drops the line rather than printing a label
    with nothing after it."""
    client = FakeTmdbClient(_details(created_by=created_by))

    meta = await WebRTCPeerSession._tmdb_build_meta(client, "4087", "tv", {"id": 4087})

    assert meta["director"] is None


async def test_an_empty_tv_crew_no_longer_decides_the_answer():
    """The old shape, kept as a regression: a show whose aggregate crew has a
    Director entry is still described by its creators, and one whose crew is
    empty — the usual case — is no longer left blank."""
    client = FakeTmdbClient(
        _details(created_by=[{"name": "A Creator"}]),
        credits={"cast": [], "crew": [{"job": "Director", "name": "An Episode Director"}]})

    meta = await WebRTCPeerSession._tmdb_build_meta(client, "4087", "tv", {"id": 4087})

    assert meta["director"] == "A Creator"


async def test_a_movie_still_takes_its_director_from_the_crew():
    """`created_by` does not exist on a movie; nothing about that path moves."""
    client = FakeTmdbClient(
        {"title": "Some Film", "overview": "A synopsis.", "poster_path": "/p.jpg",
         "genres": [{"name": "Thriller"}], "release_date": "2014-02-01"},
        credits={"cast": [{"name": "A Performer", "character": "Someone"}],
                 "crew": [{"job": "Editor", "name": "An Editor"},
                          {"job": "Director", "name": "A Director"}]})

    meta = await WebRTCPeerSession._tmdb_build_meta(client, "418517", "movie", {"id": 418517})

    assert meta["director"] == "A Director"
    assert meta["cast"] == [{"name": "A Performer", "character": "Someone"}]