"""Tests for Discord RPC module (discord_rpc.py)."""

import time
from unittest import mock

import pytest


# ── _safe_artists ─────────────────────────────────────────────────────────────

class TestSafeArtists:
    """Tests for the _safe_artists helper."""

    def _import(self):
        from discord_rpc import _safe_artists
        return _safe_artists

    def test_none_song(self):
        fn = self._import()
        assert fn(None) == ""

    def test_empty_dict(self):
        fn = self._import()
        assert fn({}) == ""

    def test_missing_artists_key(self):
        fn = self._import()
        assert fn({"title": "Test"}) == ""

    def test_artists_not_list(self):
        fn = self._import()
        assert fn({"artists": "not a list"}) == ""

    def test_empty_artists_list(self):
        fn = self._import()
        assert fn({"artists": []}) == ""

    def test_single_artist(self):
        fn = self._import()
        song = {"artists": [{"name": "Test Artist", "id": "x"}]}
        assert fn(song) == "Test Artist"

    def test_multiple_artists(self):
        fn = self._import()
        song = {
            "artists": [
                {"name": "Artist One", "id": "1"},
                {"name": "Artist Two", "id": "2"},
            ]
        }
        assert fn(song) == "Artist One, Artist Two"

    def test_artist_without_name(self):
        fn = self._import()
        song = {"artists": [{"id": "x"}, {"name": "Real Artist", "id": "y"}]}
        assert fn(song) == "Real Artist"

    def test_artist_is_not_dict(self):
        fn = self._import()
        song = {"artists": ["just a string"]}
        assert fn(song) == ""

    def test_artist_with_empty_name(self):
        fn = self._import()
        song = {"artists": [{"name": "", "id": "x"}]}
        assert fn(song) == ""


# ── DiscordRPC ────────────────────────────────────────────────────────────────

class TestDiscordRPC:
    """Tests for DiscordRPC class with mocked pypresence."""

    @pytest.fixture
    def rpc(self):
        with mock.patch("discord_rpc.Presence") as mock_presence:
            # Make the mock Presence instance return a mock
            mock_instance = mock.MagicMock()
            mock_presence.return_value = mock_instance

            from discord_rpc import DiscordRPC
            rpc = DiscordRPC(client_id="test_client_123")
            yield rpc, mock_instance
            rpc.stop()

    def test_constructor(self, rpc):
        drpc, _ = rpc
        assert drpc._client_id == "test_client_123"
        assert drpc._connected is False
        assert drpc._song is None

    def test_start_and_connect(self, rpc):
        drpc, mock_presence = rpc
        drpc.start()
        # Give the thread a moment to connect
        import time
        time.sleep(0.1)
        assert drpc._connected is True
        mock_presence.connect.assert_called_once()

    def test_update_song_sets_song_and_resets_start(self, rpc):
        drpc, _ = rpc
        song = {"title": "Test", "artists": [{"name": "A"}], "duration": 200}
        drpc.update_song(song, reset_start=True)
        assert drpc._song == song
        assert drpc._start_ts is not None

    def test_update_song_none(self, rpc):
        drpc, _ = rpc
        drpc.update_song(None)
        assert drpc._song is None
        assert drpc._start_ts is None

    def test_update_song_no_reset(self, rpc):
        drpc, _ = rpc
        song = {"title": "Test", "artists": [{"name": "A"}], "duration": 200}
        drpc.update_song(song, reset_start=True)
        old_start = drpc._start_ts
        time.sleep(0.01)
        # Without reset, start_ts should stay the same
        drpc.update_song(song, reset_start=False)
        assert drpc._start_ts == old_start

    def test_clear_presence(self, rpc):
        drpc, _ = rpc
        drpc.update_song({"title": "Test"})
        assert drpc._song is not None
        drpc.clear()
        assert drpc._song is None
        assert drpc._start_ts is None

    def test_seek_to_adjusts_start_ts(self, rpc):
        drpc, _ = rpc
        drpc.update_song({"title": "Test"}, reset_start=True)
        original_start = drpc._start_ts
        time.sleep(0.01)
        drpc.seek_to(position_ms=30_000)  # seek to 30s
        # Now the diff between now and start_ts should be ~30s
        diff = int(time.time()) - drpc._start_ts
        assert 28 <= diff <= 32  # allow some fuzz

    def test_stop_disconnects_and_joins(self, rpc):
        drpc, mock_presence = rpc
        drpc.start()
        time.sleep(0.1)
        drpc.stop()
        assert drpc._rpc is None
        assert drpc._connected is False

    def test_send_presence_clears_when_no_song(self, rpc):
        drpc, mock_presence = rpc
        drpc.start()
        time.sleep(0.1)
        drpc.clear()
        time.sleep(0.1)
        mock_presence.clear.assert_called()

    def test_double_start_is_idempotent(self, rpc):
        drpc, _ = rpc
        drpc.start()
        drpc.start()  # should not crash
        assert True

    @mock.patch("discord_rpc.Presence")
    def test_connect_failure_graceful(self, mock_presence_cls):
        """When Discord is not running, connect failure is handled gracefully."""
        from discord_rpc import DiscordRPC
        mock_instance = mock.MagicMock()
        mock_instance.connect.side_effect = Exception("Discord not found")
        mock_presence_cls.return_value = mock_instance

        drpc = DiscordRPC(client_id="test")
        drpc.start()
        time.sleep(0.1)
        # Should not crash, just log a warning
        assert drpc._connected is False
        drpc.stop()