"""Router tests - Playlist endpoints."""
from app.models.song import Song
from app.models.playlist import Playlist, PlaylistSong


class TestListPlaylists:
    def test_empty_list(self, client):
        r = client.get("/api/playlists")
        assert r.status_code == 200
        assert r.json() == []

    def test_with_playlists(self, client, db_module):
        db = db_module.SessionLocal()
        p = Playlist(id="p1", name="Test Playlist")
        db.add(p)
        db.commit()
        db.close()
        r = client.get("/api/playlists")
        assert r.status_code == 200
        data = r.json()
        assert len(data) == 1
        assert data[0]["name"] == "Test Playlist"
        assert "song_count" in data[0]


class TestCreatePlaylist:
    def test_create_basic(self, client):
        r = client.post("/api/playlists", json={"name": "New Playlist", "description": "Test"})
        assert r.status_code == 200
        data = r.json()
        assert data["name"] == "New Playlist"
        assert "id" in data
        assert len(data["id"]) > 0

    def test_create_with_songs(self, client, db_module):
        db = db_module.SessionLocal()
        song = Song(id="s1", title="Test", artist="A", file_path="/tmp/t.mp3")
        db.add(song)
        db.commit()
        db.close()
        r = client.post("/api/playlists", json={"name": "With Songs", "song_ids": ["s1"]})
        assert r.status_code == 200


class TestGetPlaylist:
    def test_found(self, client, db_module):
        db = db_module.SessionLocal()
        p = Playlist(id="p1", name="Test")
        db.add(p)
        db.commit()
        db.close()
        r = client.get("/api/playlists/p1")
        assert r.status_code == 200
        assert r.json()["name"] == "Test"
        assert "songs" in r.json()

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


class TestUpdatePlaylist:
    def test_update(self, client, db_module):
        db = db_module.SessionLocal()
        p = Playlist(id="p1", name="Old")
        db.add(p)
        db.commit()
        db.close()
        r = client.put("/api/playlists/p1", json={"name": "New", "description": "Updated"})
        assert r.status_code == 200
        assert r.json()["name"] == "New"

    def test_update_not_found(self, client):
        r = client.put("/api/playlists/nonexistent", json={"name": "X"})
        assert r.status_code == 404


class TestDeletePlaylist:
    def test_delete(self, client, db_module):
        db = db_module.SessionLocal()
        p = Playlist(id="p1", name="Test")
        db.add(p)
        db.commit()
        db.close()
        r = client.delete("/api/playlists/p1")
        assert r.status_code == 200
        assert r.json()["message"] == "Playlist deleted"

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


class TestAddRemoveSong:
    def test_add_song(self, client, db_module):
        db = db_module.SessionLocal()
        p = Playlist(id="p1", name="Test")
        s = Song(id="s1", title="T", artist="A", file_path="/tmp/t.mp3")
        db.add(p)
        db.add(s)
        db.commit()
        db.close()
        r = client.post("/api/playlists/p1/songs", params={"song_id": "s1"})
        assert r.status_code == 200

    def test_add_duplicate(self, client, db_module):
        db = db_module.SessionLocal()
        p = Playlist(id="p1", name="Test")
        s = Song(id="s1", title="T", artist="A", file_path="/tmp/t.mp3")
        ps = PlaylistSong(playlist_id="p1", song_id="s1", position=0)
        db.add(p)
        db.add(s)
        db.add(ps)
        db.commit()
        db.close()
        r = client.post("/api/playlists/p1/songs", params={"song_id": "s1"})
        assert r.status_code == 400

    def test_remove_song(self, client, db_module):
        db = db_module.SessionLocal()
        p = Playlist(id="p1", name="Test")
        s = Song(id="s1", title="T", artist="A", file_path="/tmp/t.mp3")
        ps = PlaylistSong(playlist_id="p1", song_id="s1", position=0)
        db.add(p)
        db.add(s)
        db.add(ps)
        db.commit()
        db.close()
        r = client.delete("/api/playlists/p1/songs/s1")
        assert r.status_code == 200

    def test_remove_not_in_playlist(self, client):
        r = client.delete("/api/playlists/p1/songs/s1")
        assert r.status_code == 404


class TestSharePlaylist:
    def test_share(self, client, db_module):
        db = db_module.SessionLocal()
        p = Playlist(id="p1", name="Test")
        db.add(p)
        db.commit()
        db.close()
        r = client.post("/api/playlists/p1/share")
        assert r.status_code == 200
        assert "token" in r.json()

    def test_share_not_found(self, client):
        r = client.post("/api/playlists/nonexistent/share")
        assert r.status_code == 404

    def test_get_shared(self, client, db_module):
        db = db_module.SessionLocal()
        p = Playlist(id="p1", name="Test", share_token="abc123", is_shared=True)
        db.add(p)
        db.commit()
        db.close()
        r = client.get("/api/playlists/shared/abc123")
        assert r.status_code == 200

    def test_get_shared_not_found(self, client):
        r = client.get("/api/playlists/shared/nonexistent")
        assert r.status_code == 404