import pytest

from app.config import Settings
from app.errors import UnknownComponentError
from app.store import SessionOwnershipError
from app.dependencies import (
    resolve_route,
    get_llm_provider,
    get_tts_provider,
    get_store,
)


def test_default_route_from_settings():
    cfg = Settings()
    route = resolve_route(cfg=cfg)
    assert route.stt_provider == cfg.default_stt_provider
    assert route.llm_provider == cfg.default_llm_provider
    assert route.input_endpoint == cfg.default_input_endpoint
    assert route.language == cfg.default_language


def test_request_overrides_win():
    route = resolve_route(overrides={"llm_provider": "openrouter", "output_endpoint": "loopback"})
    assert route.llm_provider == "openrouter"
    assert route.output_endpoint == "loopback"


def test_user_prefs_session_request_precedence():
    store = get_store()
    user, _ = store.create_user("Tester")
    store.set_user_prefs(user.id, {"tts_provider": "chatterbox", "language": "en"})
    user = store.get_user(user.id)

    # Nutzer-Prefs gelten.
    route = resolve_route(user)
    assert route.tts_provider == "chatterbox"
    assert route.language == "en"

    # Session schlägt Nutzer-Prefs.
    store.update_session("s1", user.id, {"tts_provider": "piper"})
    route2 = resolve_route(user, "s1")
    assert route2.tts_provider == "piper"
    assert route2.language == "en"  # weiterhin aus den Nutzer-Prefs

    # Request schlägt Session.
    route3 = resolve_route(user, "s1", {"tts_provider": "openrouter"})
    assert route3.tts_provider == "openrouter"


def test_session_ownership_enforced_in_route():
    store = get_store()
    owner, _ = store.create_user("A")
    other, _ = store.create_user("B")
    store.update_session("shared", owner.id, {"tts_provider": "piper"})
    with pytest.raises(SessionOwnershipError):
        resolve_route(other, "shared")


def test_registry_unknown_provider_raises():
    with pytest.raises(UnknownComponentError):
        get_llm_provider("does-not-exist")


def test_registry_known_provider():
    assert type(get_tts_provider("piper")).__name__ == "PiperTTSProvider"


# ---------------------------------------------------------------------------
# voice_for_route: Stimm-/Geschlechts-Auswahl je Provider und Sprache.
# ---------------------------------------------------------------------------
from app.dependencies import voice_for_route, PIPER_VOICE_GENDERED


@pytest.mark.parametrize("lang,gender,expected", [
    ("de", "f", "de_DE-kerstin-low"),
    ("de", "m", "de_DE-thorsten-high"),
    ("en", "f", "en_US-amy-medium"),
    ("en", "m", "en_US-lessac-high"),
    ("fr", "f", "fr_FR-siwis-medium"),
    ("fr", "m", "fr_FR-tom-medium"),
    ("es", "f", "es_ES-sharvard-medium#1"),   # Multi-Speaker: #1 = weiblich
    ("es", "m", "es_ES-sharvard-medium#0"),   # Multi-Speaker: #0 = maennlich
    ("it", "f", "it_IT-paola-medium"),
    ("it", "m", "it_IT-riccardo-x_low"),
    ("ru", "f", "ru_RU-irina-medium"),
    ("ru", "m", "ru_RU-ruslan-medium"),
    ("pl", "f", "pl_PL-gosia-medium"),
    ("pl", "m", "pl_PL-darkman-medium"),
])
def test_piper_gendered_voice_exact(lang, gender, expected):
    assert voice_for_route("piper", lang, gender) == expected


@pytest.mark.parametrize("lang,expected", [
    ("ar", "ar_JO-kareem-medium"),
    ("pt", "pt_BR-faber-medium"),
    ("nl", "nl_NL-mls-medium"),
    ("zh", "zh_CN-huayan-medium"),
])
def test_piper_single_voice_languages_ignore_gender(lang, expected):
    # Diese Sprachen haben keinen Geschlechtspartner -> selbe Stimme fuer m und f.
    # Wichtig fuer NL: die m/f-Wahl greift hier folgenlos (einzig verfuegbare Stimme);
    # die Geraete-TTS darf deshalb nicht auf Server-Fallback ausweichen (s. app.js
    # deviceVoiceReady). Ohne diesen Eintrag wuerde voice_for_route None liefern und
    # den Server-Default (deutsche Stimme) nach sich ziehen.
    assert voice_for_route("piper", lang, "f") == expected
    assert voice_for_route("piper", lang, "m") == expected


def test_piper_any_prefers_female():
    # 'any' (und unbekannte Codes) bevorzugen weiblich, konsistent mit Cartesia.
    assert voice_for_route("piper", "de", "any") == "de_DE-kerstin-low"
    assert voice_for_route("piper", "fr", "any") == "fr_FR-siwis-medium"


def test_piper_unknown_language_returns_none():
    assert voice_for_route("piper", "xx", "f") is None


def test_piper_without_language_returns_none():
    assert voice_for_route("piper", None, "f") is None


def test_cartesia_passes_gender_code_through():
    # Cartesia loest die UUID selbst auf -> nur der Gender-Code wird durchgereicht.
    assert voice_for_route("cartesia", "de", "f") == "f"
    assert voice_for_route("cartesia", "de", "any") == "any"


def test_other_provider_returns_none():
    assert voice_for_route("openrouter", "de", "f") is None


def test_piper_falls_back_to_opposite_gender(monkeypatch):
    # Fehlt die angeforderte Richtung, wird die vorhandene Gegenrichtung genommen
    # (vor dem gender-agnostischen LANG_TO_PIPER_VOICE-Fallback).
    monkeypatch.delitem(PIPER_VOICE_GENDERED, ("de", "m"), raising=False)
    assert voice_for_route("piper", "de", "m") == "de_DE-kerstin-low"


def test_route_has_no_language_mode():
    # Flex-Modus wurde entfernt: die Route trägt kein language_mode mehr.
    route = resolve_route()
    assert "language_mode" not in route.as_dict()
    assert not hasattr(route, "language_mode")


def test_route_clamps_language_to_allowed():
    store = get_store()
    user, _ = store.create_user("Senior")
    store.set_user_prefs(user.id, {"allowed_languages": "en,fr", "language": "de"})
    user = store.get_user(user.id)
    # de ist nicht erlaubt -> auf erste erlaubte Sprache (en) geklemmt
    assert resolve_route(user).language == "en"


def test_route_keeps_allowed_language():
    store = get_store()
    user, _ = store.create_user("Senior2")
    store.set_user_prefs(user.id, {"allowed_languages": "en,fr", "language": "fr"})
    user = store.get_user(user.id)
    assert resolve_route(user).language == "fr"