"""Phase A pinning tests for NavidromeClient.

Pin the OBSERVABLE BEHAVIOR the engine will dispatch through. Auth
shape uses base_url + username + password (no token like Plex).
Both get_all_artists + get_all_album_ids return empty when the
client isn't connected.
"""

from __future__ import annotations

from unittest.mock import MagicMock, patch

import pytest

from core.navidrome_client import NavidromeAlbum, NavidromeClient


@pytest.fixture
def nav_client():
    """A bare NavidromeClient with no real connection."""
    client = NavidromeClient.__new__(NavidromeClient)
    client.base_url = None
    client.username = None
    client.password = None
    client._connection_attempted = False
    client._is_connecting = False
    client._artist_cache = {}
    client._album_cache = {}
    client._track_cache = {}
    client._folder_album_ids = None
    client._progress_callback = None
    client.music_folder_id = None
    return client


def test_is_connected_returns_false_without_credentials(nav_client):
    with patch.object(nav_client, 'ensure_connection', return_value=False):
        assert nav_client.is_connected() is False


def test_is_connected_returns_true_when_all_three_set(nav_client):
    """Pinning: requires base_url AND username AND password.
    No token model (vs Plex). Salt is generated per-request."""
    nav_client._connection_attempted = True
    nav_client.base_url = 'http://nav'
    nav_client.username = 'u'
    nav_client.password = 'p'
    assert nav_client.is_connected() is True


def test_get_all_artists_returns_empty_when_not_connected(nav_client):
    with patch.object(nav_client, 'ensure_connection', return_value=False):
        assert nav_client.get_all_artists() == []


def test_get_all_album_ids_returns_set(nav_client):
    """Pinning: returns a set of string Navidrome ids. Same shape
    semantic as Plex/Jellyfin (set of strings) — engine extraction
    depends on uniform set type."""
    nav_client._connection_attempted = True
    nav_client.base_url = 'http://nav'
    nav_client.username = 'u'
    nav_client.password = 'p'

    # Navidrome uses paginated getAlbumList2 — first page returns
    # 2 albums, second returns empty (terminates loop).
    # _make_request unwraps the subsonic-response envelope and
    # returns the body. get_all_album_ids reads response.albumList2.album.
    page_responses = [
        {'albumList2': {'album': [{'id': 'nav-1'}, {'id': 'nav-2'}]}},
        {'albumList2': {'album': []}},
    ]

    with patch.object(nav_client, 'ensure_connection', return_value=True), \
         patch.object(nav_client, '_make_request', side_effect=page_responses):
        result = nav_client.get_all_album_ids()

    assert isinstance(result, set)
    assert result == {'nav-1', 'nav-2'}


def test_fetch_music_folders_parses_without_ensure_connection(nav_client):
    """The seam: _fetch_music_folders does its own _make_request + parse and
    does NOT gate on ensure_connection, so it is safe to call mid-connect."""
    nav_client.base_url = 'http://nav'
    nav_client.username = 'u'
    nav_client.password = 'p'
    folders_envelope = {'musicFolders': {'musicFolder': [
        {'id': 1, 'name': 'Music'},
        {'id': 2, 'name': 'Audiobooks'},
    ]}}
    with patch.object(nav_client, '_make_request', return_value=folders_envelope):
        folders = nav_client._fetch_music_folders()
    assert folders == [
        {'title': 'Music', 'key': '1'},
        {'title': 'Audiobooks', 'key': '2'},
    ]


def _fake_request(endpoint, params=None):
    if endpoint == 'ping':
        return {'status': 'ok', 'version': '1.16.1'}
    if endpoint == 'getMusicFolders':
        return {'musicFolders': {'musicFolder': [
            {'id': 1, 'name': 'Music'},
            {'id': 2, 'name': 'Audiobooks'},
        ]}}
    return None


def _prefs(values):
    """A MusicDatabase mock whose get_preference reads from `values`."""
    db = MagicMock()
    db.get_preference.side_effect = lambda key, *a, **k: values.get(key)
    return db


def _connect_with(nav_client, fake_db):
    with patch('core.navidrome_client.config_manager.get_navidrome_config',
               return_value={'base_url': 'http://nav', 'username': 'u', 'password': 'p'}), \
         patch('database.music_database.MusicDatabase', return_value=fake_db), \
         patch.object(nav_client, '_make_request', side_effect=_fake_request):
        assert nav_client.ensure_connection() is True


def test_setup_client_restores_saved_music_folder(nav_client):
    """Regression for #789: a saved music-folder selection must survive
    _setup_client. The restore runs while still inside ensure_connection()
    (_is_connecting=True); the old code called the public get_music_folders(),
    which re-entered the guard, got [], and left music_folder_id=None — so
    every scan imported all libraries regardless of the user's selection."""
    fake_db = _prefs({'navidrome_music_folder_id': '2', 'navidrome_music_folder': 'Audiobooks'})
    _connect_with(nav_client, fake_db)
    assert nav_client.music_folder_id == '2'
    # Nothing drifted → no self-heal writes.
    fake_db.set_preference.assert_not_called()


def test_setup_client_restores_by_id_after_folder_rename(nav_client):
    """Hardening: the id is the primary key, so a folder renamed in Navidrome
    (stored name no longer matches its title) still resolves by id — and the
    stale name is healed so the settings dropdown stays correct."""
    fake_db = _prefs({'navidrome_music_folder_id': '2', 'navidrome_music_folder': 'Old Stale Name'})
    _connect_with(nav_client, fake_db)
    assert nav_client.music_folder_id == '2'
    fake_db.set_preference.assert_any_call('navidrome_music_folder', 'Audiobooks')


def test_setup_client_name_fallback_self_heals_id(nav_client):
    """Back-compat: installs saved before the id was persisted match by name,
    and the id is written back so a later rename can't break the match."""
    fake_db = _prefs({'navidrome_music_folder_id': None, 'navidrome_music_folder': 'Audiobooks'})
    _connect_with(nav_client, fake_db)
    assert nav_client.music_folder_id == '2'
    fake_db.set_preference.assert_any_call('navidrome_music_folder_id', '2')


def test_navidrome_album_exposes_cover_art_url(nav_client):
    album = NavidromeAlbum({
        'id': 'album-1',
        'name': 'Flower Boy',
        'coverArt': 'cover-123',
    }, nav_client)

    assert album.thumb == '/rest/getCoverArt?id=cover-123'


def test_navidrome_album_cover_art_falls_back_to_album_id(nav_client):
    album = NavidromeAlbum({
        'id': 'album-1',
        'name': 'Flower Boy',
    }, nav_client)

    assert album.thumb == '/rest/getCoverArt?id=album-1'