import pytest
from unittest.mock import patch, MagicMock
from app.pipeline import youtube


@pytest.fixture
def fresh_db(monkeypatch, tmp_path):
    from app import db
    monkeypatch.setattr(db, "DB_PATH", str(tmp_path / "music.db"))
    db.init_db()
    return db


def _setup_token(db_module):
    db_module.upsert_oauth_token(
        channel_id="UC1", channel_title="t", avatar_url=None,
        refresh_token="r1", access_token="a1", expires_at="2099-01-01T00:00:00",
    )


@patch("app.pipeline.youtube._build_youtube_client")
def test_upload_succeeds_after_resumable(mock_client, fresh_db, tmp_path, monkeypatch):
    monkeypatch.setenv("YOUTUBE_OAUTH_CLIENT_ID", "cid")
    monkeypatch.setenv("YOUTUBE_OAUTH_CLIENT_SECRET", "sec")
    _setup_token(fresh_db)

    yt = MagicMock()
    insert = MagicMock()
    # next_chunk: first call returns (None, None), second returns (None, response with id)
    insert.next_chunk.side_effect = [(None, None), (None, {"id": "VID123"})]
    yt.videos().insert.return_value = insert
    mock_client.return_value = yt

    video_path = tmp_path / "v.mp4"
    video_path.write_bytes(b"\x00" * 100)
    out = youtube.upload_video(
        video_path=str(video_path),
        thumbnail_path=None,
        metadata={"title": "T", "description": "D", "tags": ["x"], "category_id": 10},
        privacy="private",
    )
    assert out["video_id"] == "VID123"


def test_upload_no_token_raises(fresh_db, tmp_path):
    video_path = tmp_path / "v.mp4"
    video_path.write_bytes(b"\x00")
    with pytest.raises(youtube.NotAuthenticatedError):
        youtube.upload_video(
            video_path=str(video_path), thumbnail_path=None,
            metadata={"title":"T","description":"D","tags":[],"category_id":10},
            privacy="private",
        )


@patch("app.pipeline.youtube._build_youtube_client")
def test_upload_quota_exceeded_marks_quota(mock_client, fresh_db, tmp_path, monkeypatch):
    from googleapiclient.errors import HttpError
    monkeypatch.setenv("YOUTUBE_OAUTH_CLIENT_ID", "cid")
    monkeypatch.setenv("YOUTUBE_OAUTH_CLIENT_SECRET", "sec")
    _setup_token(fresh_db)

    yt = MagicMock()
    err = HttpError(MagicMock(status=403), b'{"error":{"errors":[{"reason":"quotaExceeded"}]}}')
    insert_call = MagicMock()
    insert_call.next_chunk.side_effect = err
    yt.videos().insert.return_value = insert_call
    mock_client.return_value = yt

    video_path = tmp_path / "v.mp4"
    video_path.write_bytes(b"\x00")
    with pytest.raises(youtube.QuotaExceededError):
        youtube.upload_video(
            video_path=str(video_path), thumbnail_path=None,
            metadata={"title":"T","description":"D","tags":[],"category_id":10},
            privacy="private",
        )


def test_get_status_returns_none_when_not_connected(fresh_db):
    assert youtube.get_status() is None


def test_get_status_returns_channel_info(fresh_db):
    _setup_token(fresh_db)
    s = youtube.get_status()
    assert s["channel_id"] == "UC1"
    assert s["channel_title"] == "t"