import pytest
from app import db


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


def test_get_last_failed_step_returns_step(fresh_db):
    pid = db.create_pipeline(track_id=1)
    job_id = db.create_pipeline_job(pid, "video")
    db.update_pipeline_job(job_id, status="failed", error="boom")
    db.update_pipeline_state(pid, "failed", failed_reason="video: boom")
    assert db.get_last_failed_step(pid) == "video"


def test_get_last_failed_step_none_when_no_failure(fresh_db):
    pid = db.create_pipeline(track_id=1)
    db.create_pipeline_job(pid, "cover")
    assert db.get_last_failed_step(pid) is None