"""Router tests - Songs endpoints."""
from app.models.song import Song


class TestListSongs:
    def test_empty_list(self, client):
        r = client.get("/api/songs")
        assert r.status_code == 200
        data = r.json()
        assert data["total"] == 0
        assert data["items"] == []
        assert data["page"] == 1
        assert data["per_page"] == 50

    def test_pagination_fields(self, client):
        r = client.get("/api/songs?page=1&per_page=10")
        assert r.status_code == 200
        data = r.json()
        assert "total_pages" in data
        assert data["total_pages"] >= 1

    def test_with_songs(self, client, db_module):
        db = db_module.SessionLocal()
        song = Song(id="s1", title="Test", artist="Artist", file_path="/tmp/test.mp3")
        db.add(song)
        db.commit()
        db.close()
        r = client.get("/api/songs")
        assert r.status_code == 200
        data = r.json()
        assert data["total"] == 1
        assert data["items"][0]["title"] == "Test"


class TestGetSong:
    def test_found(self, client, db_module):
        db = db_module.SessionLocal()
        song = Song(id="s1", title="Test", artist="Artist", file_path="/tmp/test.mp3")
        db.add(song)
        db.commit()
        db.close()
        r = client.get("/api/songs/s1")
        assert r.status_code == 200
        assert r.json()["title"] == "Test"

    def test_not_found(self, client):
        r = client.get("/api/songs/nonexistent")
        assert r.status_code == 404


class TestDeleteSong:
    def test_delete_found(self, client, db_module):
        db = db_module.SessionLocal()
        song = Song(id="s1", title="Test", artist="Artist", file_path="/tmp/test.mp3")
        db.add(song)
        db.commit()
        db.close()
        r = client.delete("/api/songs/s1")
        assert r.status_code == 200
        assert r.json()["message"] == "Song deleted"

    def test_delete_not_found(self, client):
        r = client.delete("/api/songs/nonexistent")
        assert r.status_code == 404


class TestScanSongs:
    def test_scan_default_dir(self, client):
        r = client.post("/api/songs/scan")
        assert r.status_code == 200
        data = r.json()
        assert "scanned" in data
        assert "added" in data
        assert "skipped" in data
        assert "errors" in data


class TestUploadSong:
    def test_unsupported_format(self, client):
        r = client.post(
            "/api/songs/upload",
            files={"file": ("test.txt", b"content", "text/plain")},
        )
        assert r.status_code == 400