"""A share link's address says what it opens: /watch/ a video, /file/ anything else, /folder/ a folder.

Only a word for the reader: the token is the key, so every path opens every link, and the links
already sent out on /watch/ keep working for good. DB-lane.
"""

import pytest
from cryptography.fernet import Fernet

from app import main, security
from app.config import settings
from app.downloads import og
from app.downloads import probe as probemod

_PAGE = """<!doctype html><html><head>
<!--OG:START--><meta property="og:title" content="Siftlode" /><!--OG:END-->
</head><body><script src="/assets/{entry}.js"></script></body></html>"""

_VIDEO = {
    "streams": [
        {"codec_type": "video", "codec_name": "h264", "pix_fmt": "yuv420p"},
        {"codec_type": "audio", "codec_name": "aac"},
    ],
    "format": {"format_name": "mov,mp4", "duration": "5"},
}
_AUDIO = {
    "streams": [{"codec_type": "audio", "codec_name": "aac"}],
    "format": {"format_name": "mov,mp4", "duration": "5"},
}


@pytest.fixture
def pages(tmp_path, monkeypatch):
    index, watch = tmp_path / "index.html", tmp_path / "watch.html"
    index.write_text(_PAGE.format(entry="app"), encoding="utf-8")
    watch.write_text(_PAGE.format(entry="watch"), encoding="utf-8")
    monkeypatch.setattr(main, "INDEX_HTML", index)
    monkeypatch.setattr(main, "WATCH_HTML", watch)


@pytest.fixture
def key(monkeypatch):
    """A link's address is read back from its encrypted token."""
    monkeypatch.setattr(security, "_fernet", Fernet(Fernet.generate_key()))


@pytest.fixture
def shared(as_user, make_user, tmp_path, monkeypatch, upload_headers):
    """Uploads a file ffprobe reads as `data` (None: it cannot read it) and shares it."""
    monkeypatch.setattr(settings, "files_root", str(tmp_path / "media"))
    owner = as_user(make_user())

    def share(name: str, data: dict | None, **link: object) -> dict:
        monkeypatch.setattr(probemod, "probe_json", lambda _p: data)
        job = owner.post(
            "/api/files/upload",
            content=b"some bytes",
            headers=upload_headers(name, display_name=name),
        )
        assert job.status_code == 200, job.text
        made = owner.post(f"/api/downloads/{job.json()['id']}/links", json=link)
        assert made.status_code == 200, made.text
        return made.json()

    share.owner = owner  # type: ignore[attr-defined]
    return share


@pytest.mark.parametrize(
    ("name", "data", "prefix"),
    [
        ("clip.mp4", _VIDEO, "/watch/"),
        ("song.m4a", _AUDIO, "/file/"),
        ("backup.tar.gz", None, "/file/"),
    ],
)
def test_a_link_is_given_out_on_the_path_of_what_it_opens(shared, name, data, prefix):
    made = shared(name, data)
    assert made["url"] == f"{prefix}{made['token']}"


def test_a_folder_link_is_given_out_on_folder(shared, key):
    owner = shared.owner
    folder = owner.post("/api/files/folders", json={"name": "Friends"}).json()
    made = owner.post(f"/api/downloads/folders/{folder['id']}/links", json={}).json()
    assert made["url"] == f"/folder/{made['token']}"
    listed = owner.get(f"/api/downloads/folders/{folder['id']}/links").json()
    assert [entry["url"] for entry in listed] == [made["url"]]


def test_the_list_gives_the_same_address_as_the_making(shared, key):
    made = shared("backup.tar.gz", None)
    owner = shared.owner
    files = owner.get("/api/files").json()
    job_id = next(f["id"] for f in files if f["display_name"] == "backup.tar.gz")
    listed = owner.get(f"/api/downloads/{job_id}/links").json()
    assert [entry["url"] for entry in listed] == [made["url"]]


@pytest.mark.parametrize("path", ["watch", "file", "folder"])
@pytest.mark.parametrize(
    ("name", "data"), [("clip.mp4", _VIDEO), ("backup.tar.gz", None)], ids=["video", "file"]
)
def test_every_path_opens_every_link(pages, shared, client, path, name, data):
    """The links already sent on /watch/ open whatever they open, for good."""
    token = shared(name, data)["token"]
    r = client.get(f"/{path}/{token}")
    assert r.status_code == 200
    assert "/assets/watch.js" in r.text and "/assets/app.js" not in r.text
    assert f'content="{name}"' in r.text


@pytest.mark.parametrize("path", ["/file/no-such-token", "/folder/no-such-token", "/file/a/b"])
def test_a_new_path_without_a_live_link_still_gets_the_player(pages, client, path):
    r = client.get(path)
    assert r.status_code == 200
    assert "/assets/watch.js" in r.text and "/assets/app.js" not in r.text


def test_a_card_names_a_file_as_a_file(shared, db):
    made = shared("backup.tar.gz", None)
    tags = og._watch_tags(made["token"], db)
    assert f'{made["url"]}"' in tags
    assert "video.other" not in tags

    locked = shared("notes.tar.gz", None, password="pw")
    hidden = og._watch_tags(locked["token"], db)
    assert "Password-protected file" in hidden and "notes" not in hidden
    assert "video.other" not in hidden


def test_a_card_of_a_video_stays_a_video(shared, db):
    made = shared("clip.mp4", _VIDEO)
    tags = og._watch_tags(made["token"], db)
    assert f"/watch/{made['token']}" in tags and "video.other" in tags
    locked = shared("other.mp4", _VIDEO, password="pw")
    assert "Password-protected video" in og._watch_tags(locked["token"], db)


@pytest.mark.parametrize(
    ("name", "data", "video"),
    [("clip.mp4", _VIDEO, True), ("song.m4a", _AUDIO, False), ("backup.tar.gz", None, False)],
)
def test_a_password_link_says_whether_it_opens_a_video(shared, client, name, data, video):
    """The lock screen asks to watch a video and to open anything else, whichever path it is on."""
    token = shared(name, data, password="pw")["token"]
    meta = client.get(f"/api/public/watch/{token}").json()
    assert meta == {"needs_password": True, "kind": "file", "video": video}