import pytest
from sqlalchemy import select

from backend.app.models import Credential
from backend.app.services.credential_crypto import CredentialCrypto
from backend.app.services.credential_service import (
    CredentialService,
    EmptyDataError,
    UnknownPlatformError,
    WrongAuthTypeError,
)

pytestmark = pytest.mark.integration


_NETSCAPE = (
    "# Netscape HTTP Cookie File\n"
    ".patreon.com\tTRUE\t/\tTRUE\t1700000000\tsession_id\tabc\n"
)


@pytest.fixture
def crypto(tmp_path):
    return CredentialCrypto(tmp_path / "k")


@pytest.mark.asyncio
async def test_upsert_creates_then_updates(db, crypto):
    svc = CredentialService(db, crypto)
    rec = await svc.upsert(
        platform="patreon", credential_type="cookies", data=_NETSCAPE,
    )
    assert rec.platform == "patreon"
    assert rec.credential_type == "cookies"
    again = await svc.upsert(
        platform="patreon", credential_type="cookies", data=_NETSCAPE + "x",
    )
    assert again.platform == "patreon"
    rows = (await db.execute(
        select(Credential).where(Credential.platform == "patreon")
    )).scalars().all()
    assert len(rows) == 1


@pytest.mark.asyncio
async def test_upsert_rejects_unknown_platform(db, crypto):
    svc = CredentialService(db, crypto)
    with pytest.raises(UnknownPlatformError):
        await svc.upsert(platform="fanbox", credential_type="cookies", data="x")


@pytest.mark.asyncio
async def test_upsert_rejects_wrong_auth_type(db, crypto):
    svc = CredentialService(db, crypto)
    # discord is token-only
    with pytest.raises(WrongAuthTypeError):
        await svc.upsert(platform="discord", credential_type="cookies", data="x")
    # patreon is cookies-only
    with pytest.raises(WrongAuthTypeError):
        await svc.upsert(platform="patreon", credential_type="token", data="x")


@pytest.mark.asyncio
async def test_upsert_rejects_empty_data(db, crypto):
    svc = CredentialService(db, crypto)
    with pytest.raises(EmptyDataError):
        await svc.upsert(platform="patreon", credential_type="cookies", data="   ")


@pytest.mark.asyncio
async def test_list_excludes_blob(db, crypto):
    svc = CredentialService(db, crypto)
    await svc.upsert(platform="patreon", credential_type="cookies", data=_NETSCAPE)
    records = await svc.list()
    assert len(records) == 1
    d = records[0].to_dict()
    assert "data" not in d
    assert "encrypted_blob" not in d


@pytest.mark.asyncio
async def test_delete(db, crypto):
    svc = CredentialService(db, crypto)
    await svc.upsert(platform="patreon", credential_type="cookies", data=_NETSCAPE)
    await svc.delete("patreon")
    assert await svc.get("patreon") is None


@pytest.mark.asyncio
async def test_get_cookies_path_writes_usable_file(db, crypto, tmp_path):
    svc = CredentialService(db, crypto, cookies_dir=tmp_path / "cookies")
    await svc.upsert(platform="patreon", credential_type="cookies", data=_NETSCAPE)
    path = await svc.get_cookies_path("patreon")
    assert path is not None and path.exists()
    contents = path.read_text()
    assert ".patreon.com" in contents
    assert "session_id" in contents


@pytest.mark.asyncio
async def test_get_cookies_path_none_for_missing(db, crypto, tmp_path):
    svc = CredentialService(db, crypto, cookies_dir=tmp_path)
    assert await svc.get_cookies_path("patreon") is None


@pytest.mark.asyncio
async def test_get_cookies_path_none_for_token_kind(db, crypto, tmp_path):
    svc = CredentialService(db, crypto, cookies_dir=tmp_path)
    await svc.upsert(platform="discord", credential_type="token", data="tok")
    assert await svc.get_cookies_path("discord") is None


@pytest.mark.asyncio
async def test_get_cookies_path_subscribestar_injects_age_cookie(db, crypto, tmp_path):
    """SubscribeStar's server gates artist pages behind a _personalization_id
    cookie; the browser-stored cookie expires annually and can't be easily
    refreshed (the JS age popup is suppressed by localStorage). Mirror
    gallery-dl's own login-flow workaround by injecting
    `18_plus_agreement_generic=true` on `.subscribestar.adult` whenever
    cookies for subscribestar are materialized."""
    netscape_in = (
        "# Netscape HTTP Cookie File\n"
        ".subscribestar.adult\tTRUE\t/\tTRUE\t1700000000\tsession_id\txyz\n"
    )
    svc = CredentialService(db, crypto, cookies_dir=tmp_path / "cookies")
    await svc.upsert(platform="subscribestar", credential_type="cookies", data=netscape_in)
    path = await svc.get_cookies_path("subscribestar")
    contents = path.read_text()
    assert "18_plus_agreement_generic\ttrue" in contents
    assert ".subscribestar.adult" in contents
    # Original session_id cookie preserved.
    assert "session_id\txyz" in contents


@pytest.mark.asyncio
async def test_get_cookies_path_subscribestar_idempotent_when_present(db, crypto, tmp_path):
    """If the operator's captured cookies ALREADY contain the age cookie
    (e.g. a manual paste, or a re-login), don't double-inject."""
    netscape_in = (
        "# Netscape HTTP Cookie File\n"
        ".subscribestar.adult\tTRUE\t/\tTRUE\t1700000000\t18_plus_agreement_generic\ttrue\n"
        ".subscribestar.adult\tTRUE\t/\tTRUE\t1700000000\tsession_id\txyz\n"
    )
    svc = CredentialService(db, crypto, cookies_dir=tmp_path / "cookies")
    await svc.upsert(platform="subscribestar", credential_type="cookies", data=netscape_in)
    path = await svc.get_cookies_path("subscribestar")
    contents = path.read_text()
    assert contents.count("18_plus_agreement_generic") == 1


@pytest.mark.asyncio
async def test_get_cookies_path_non_subscribestar_unchanged(db, crypto, tmp_path):
    """The age-cookie injection MUST NOT fire for non-subscribestar
    platforms — Patreon/HF/etc. don't need it and shouldn't carry a
    foreign-domain cookie in their cookies.txt."""
    svc = CredentialService(db, crypto, cookies_dir=tmp_path / "cookies")
    await svc.upsert(platform="patreon", credential_type="cookies", data=_NETSCAPE)
    path = await svc.get_cookies_path("patreon")
    contents = path.read_text()
    assert "18_plus_agreement_generic" not in contents
    assert "subscribestar" not in contents


@pytest.mark.asyncio
async def test_get_token_decrypts(db, crypto):
    svc = CredentialService(db, crypto)
    await svc.upsert(platform="discord", credential_type="token", data="my-token")
    assert await svc.get_token("discord") == "my-token"


@pytest.mark.asyncio
async def test_get_token_none_for_cookies_kind(db, crypto):
    svc = CredentialService(db, crypto)
    await svc.upsert(platform="patreon", credential_type="cookies", data=_NETSCAPE)
    assert await svc.get_token("patreon") is None