from lyra_worker.adapters.fakes import FakeQobuz, FakeSoulseek, FakeYouTube, FailingAdapter
from lyra_worker.claim import claim_next
from lyra_worker.pipeline import run_pipeline
from tests.conftest import insert_request


def _job_state(conn, job_id):
    with conn.cursor() as cur:
        cur.execute('SELECT state, "currentStage" FROM "Job" WHERE id = %s', (job_id,))
        return cur.fetchone()


def _request_status(conn, job_id):
    with conn.cursor() as cur:
        cur.execute(
            'SELECT status FROM "Request" WHERE id = (SELECT "requestId" FROM "Job" WHERE id = %s)',
            (job_id,),
        )
        return cur.fetchone()[0]


def _download_progress(conn, job_id):
    with conn.cursor() as cur:
        cur.execute('SELECT "downloadProgress" FROM "Job" WHERE id = %s', (job_id,))
        return cur.fetchone()[0]


def test_success_picks_best_source_and_imports(conn):
    job_id = insert_request(conn, artist="Radiohead", album="In Rainbows")
    claim_next(conn)
    run_pipeline(conn, job_id, [FakeYouTube(), FakeSoulseek(), FakeQobuz()], dest_root="/tmp/lib")

    assert _job_state(conn, job_id) == ("imported", "import")
    assert _request_status(conn, job_id) == "completed"
    assert _download_progress(conn, job_id) == 1.0  # a successful download completes at 100%
    with conn.cursor() as cur:
        cur.execute('SELECT source FROM "Candidate" WHERE "jobId" = %s AND chosen = true', (job_id,))
        assert cur.fetchone()[0] == "qobuz"  # highest quality won
        cur.execute('SELECT source, format FROM "LibraryItem" WHERE artist = %s', ("Radiohead",))
        row = cur.fetchone()
        assert row[0] == "qobuz"


def test_falls_through_when_best_download_fails(conn):
    job_id = insert_request(conn, artist="Radiohead", album="In Rainbows")
    claim_next(conn)
    # FailingAdapter is source 'qobuz' (tier 0) whose download fails; Soulseek should win.
    run_pipeline(conn, job_id, [FailingAdapter(), FakeSoulseek()], dest_root="/tmp/lib")

    assert _job_state(conn, job_id) == ("imported", "import")
    assert _download_progress(conn, job_id) == 1.0  # falls through, but still completes at 100%
    with conn.cursor() as cur:
        cur.execute('SELECT source FROM "Candidate" WHERE "jobId" = %s AND chosen = true', (job_id,))
        assert cur.fetchone()[0] == "soulseek"


def test_fallthrough_marks_exactly_one_chosen(conn):
    # `chosen` now marks the source in flight at each attempt; after falling through from a
    # failed source to a working one, exactly ONE candidate stays chosen (the winner) — the
    # attempted-then-failed source must be un-marked (exclusive _mark_chosen).
    job_id = insert_request(conn, artist="Radiohead", album="In Rainbows")
    claim_next(conn)
    run_pipeline(conn, job_id, [FailingAdapter(), FakeSoulseek()], dest_root="/tmp/lib")
    with conn.cursor() as cur:
        cur.execute('SELECT count(*) FROM "Candidate" WHERE "jobId" = %s AND chosen = true', (job_id,))
        assert cur.fetchone()[0] == 1
        cur.execute('SELECT source FROM "Candidate" WHERE "jobId" = %s AND chosen = true', (job_id,))
        assert cur.fetchone()[0] == "soulseek"


def test_no_match_goes_to_needs_attention(conn):
    job_id = insert_request(conn, artist="Radiohead", album="In Rainbows")
    claim_next(conn)
    run_pipeline(conn, job_id, [FakeQobuz(matches=False)], dest_root="/tmp/lib")

    assert _job_state(conn, job_id)[0] == "needs_attention"
    assert _request_status(conn, job_id) == "needs_attention"


def test_all_downloads_fail_goes_to_needs_attention(conn):
    job_id = insert_request(conn, artist="Radiohead", album="In Rainbows")
    claim_next(conn)
    run_pipeline(conn, job_id, [FailingAdapter()], dest_root="/tmp/lib")

    assert _job_state(conn, job_id)[0] == "needs_attention"
    assert _download_progress(conn, job_id) == 0.0  # never reached 1.0 — all attempts failed


def test_incomplete_download_goes_to_needs_attention(conn):
    from lyra_worker.adapters.fakes import FakeQobuz
    from lyra_worker.types import DownloadResult

    class TruncatingQobuz(FakeQobuz):
        def download(self, candidate, dest, on_progress):
            on_progress(1.0)
            # reports fewer tracks than the candidate promised -> integrity check fails
            return DownloadResult(ok=True, path=dest, track_count=candidate.track_count - 1)

    job_id = insert_request(conn, artist="Radiohead", album="In Rainbows")
    claim_next(conn)
    run_pipeline(conn, job_id, [TruncatingQobuz()], dest_root="/tmp/lib")

    assert _job_state(conn, job_id)[0] == "needs_attention"
    assert _request_status(conn, job_id) == "needs_attention"


def test_dedupe_skips_already_in_library(conn):
    # First acquisition
    job1 = insert_request(conn, artist="Radiohead", album="In Rainbows")
    claim_next(conn)
    run_pipeline(conn, job1, [FakeQobuz()], dest_root="/tmp/lib")
    # Second request for the same album
    job2 = insert_request(conn, artist="Radiohead", album="In Rainbows")
    claim_next(conn)
    run_pipeline(conn, job2, [FakeQobuz()], dest_root="/tmp/lib")

    assert _job_state(conn, job2) == ("imported", "import")
    with conn.cursor() as cur:
        # dedupe path creates no candidates for the second job
        cur.execute('SELECT count(*) FROM "Candidate" WHERE "jobId" = %s', (job2,))
        assert cur.fetchone()[0] == 0
        cur.execute('SELECT count(*) FROM "LibraryItem" WHERE artist = %s AND album = %s',
                    ("Radiohead", "In Rainbows"))
        assert cur.fetchone()[0] == 1  # not duplicated


def test_below_threshold_candidates_are_persisted_for_diagnosis(conn):
    from lyra_worker.adapters.fakes import FakeQobuz
    from lyra_worker.types import MBTarget

    class WrongAlbumQobuz(FakeQobuz):
        def search(self, target):
            # returns a candidate for a different album -> scores below the gate
            return super().search(MBTarget(artist=target.artist, album="Some Completely Unrelated Title"))

    job_id = insert_request(conn, artist="Radiohead", album="In Rainbows")
    claim_next(conn)
    run_pipeline(conn, job_id, [WrongAlbumQobuz()], dest_root="/tmp/lib")

    assert _job_state(conn, job_id)[0] == "needs_attention"
    with conn.cursor() as cur:
        cur.execute('SELECT count(*) FROM "Candidate" WHERE "jobId" = %s', (job_id,))
        assert cur.fetchone()[0] >= 1  # found-but-rejected candidate retained for diagnosis


def test_duplicate_adapter_names_raise(conn):
    import pytest
    from lyra_worker.adapters.fakes import FakeQobuz

    job_id = insert_request(conn, artist="Radiohead", album="In Rainbows")
    claim_next(conn)
    with pytest.raises(ValueError):
        run_pipeline(conn, job_id, [FakeQobuz(), FakeQobuz()], dest_root="/tmp/lib")