# -*- coding: utf-8 -*-
"""
Tests fuer das Entity-System.

Testet EntityDefinition, EntityRegistry, EntityResolver,
Datum-/Zeit-/Dauer-Aufloesung und Integration mit dem Matcher.
"""

import re
from datetime import date, time, timedelta

import pytest

from trixy_core.nlp.entities import (
    EntityDefinition,
    EntityRegistry,
    EntityResolver,
    ResolvedEntity,
    _next_weekday,
    _parse_absolute_date,
    _parse_time_string,
    _format_date_tts,
    _format_time_tts,
    _format_duration_tts,
)


# ============================================================================
# Fixtures
# ============================================================================

@pytest.fixture
def registry():
    """EntityRegistry mit Testdaten."""
    r = EntityRegistry()
    r.load_from_dict({
        "datum": {
            "open": False,
            "values": [
                "heute", "morgen", "uebermorgen", "übermorgen",
                "montag", "dienstag", "mittwoch", "donnerstag",
                "freitag", "samstag", "sonntag",
                "nächste woche", "am wochenende",
            ],
            "regex": [
                r"\d{1,2}\.\d{1,2}\.",
                r"\d{1,2}\.\d{1,2}\.\d{4}",
            ],
        },
        "zeit": {
            "open": False,
            "values": ["mittag", "mitternacht", "abend", "morgens", "nachmittag"],
            "regex": [
                r"\d{1,2} uhr",
                r"\d{1,2} uhr \d{1,2}",
                r"\d{1,2}:\d{2}",
                r"halb \w+",
            ],
        },
        "dauer": {
            "open": False,
            "values": ["eine minute", "eine stunde", "eine halbe stunde"],
            "regex": [
                r"\d+ (sekunden|sekunde)",
                r"\d+ (minuten|minute)",
                r"\d+ (stunden|stunde)",
            ],
        },
        "stadt": {
            "open": True,
            "values": ["berlin", "hamburg", "münchen", "muenchen"],
        },
        "person": {
            "open": True,
            "values": [],
        },
    })
    return r


@pytest.fixture
def resolver(registry):
    """EntityResolver mit Registry."""
    return EntityResolver(registry)


# ============================================================================
# EntityDefinition
# ============================================================================

class TestEntityDefinition:
    """Tests fuer EntityDefinition."""

    def test_defaults(self):
        """Standard-Werte pruefen."""
        ed = EntityDefinition(name="test")
        assert ed.name == "test"
        assert ed.values == set()
        assert ed.multi_word_values == set()
        assert ed.open is False
        assert ed.regex_patterns == []

    def test_mit_werten(self):
        """Definition mit Werten erstellen."""
        ed = EntityDefinition(
            name="stadt",
            values={"berlin", "hamburg"},
            open=True,
        )
        assert "berlin" in ed.values
        assert ed.open is True


# ============================================================================
# EntityRegistry
# ============================================================================

class TestEntityRegistry:
    """Tests fuer EntityRegistry."""

    def test_get_existierend(self, registry):
        """Existierenden Entity-Typ abrufen."""
        entity = registry.get("datum")
        assert entity is not None
        assert entity.name == "datum"
        assert "heute" in entity.values
        assert "morgen" in entity.values

    def test_get_nicht_existierend(self, registry):
        """Nicht existierenden Entity-Typ abrufen."""
        assert registry.get("unbekannt") is None

    def test_matches_bekannter_wert(self, registry):
        """Bekannter Wert sollte matchen."""
        assert registry.matches("heute", "datum") is True
        assert registry.matches("morgen", "datum") is True
        assert registry.matches("montag", "datum") is True

    def test_matches_unbekannter_wert_strikt(self, registry):
        """Unbekannter Wert bei strikter Entity sollte nicht matchen."""
        assert registry.matches("xyz", "datum") is False
        assert registry.matches("foobar", "zeit") is False

    def test_matches_unbekannter_wert_offen(self, registry):
        """Unbekannter Wert bei offener Entity sollte matchen."""
        assert registry.matches("tokio", "stadt") is True
        assert registry.matches("xyz", "stadt") is True

    def test_matches_mehrwort(self, registry):
        """Mehrwort-Werte sollten matchen."""
        assert registry.matches("nächste woche", "datum") is True
        assert registry.matches("am wochenende", "datum") is True

    def test_matches_regex(self, registry):
        """Regex-Werte sollten matchen."""
        assert registry.matches("15.03.", "datum") is True
        assert registry.matches("1.1.2026", "datum") is True
        assert registry.matches("15 uhr", "zeit") is True
        assert registry.matches("9:30", "zeit") is True
        assert registry.matches("halb drei", "zeit") is True
        assert registry.matches("5 minuten", "dauer") is True

    def test_matches_regex_kein_match(self, registry):
        """Nicht passende Regex sollte nicht matchen."""
        assert registry.matches("xyz", "dauer") is False

    def test_matches_unbekannter_typ(self, registry):
        """Unbekannter Typ sollte alles akzeptieren."""
        assert registry.matches("whatever", "unbekannt") is True

    def test_mehrwort_match(self, registry):
        """Mehrwort-Match ab Position testen."""
        tokens = ["nächste", "woche"]
        result = registry.match_multi_word(tokens, 0, "datum")
        assert result is not None
        assert result[0] == "nächste woche"
        assert result[1] == 2

    def test_mehrwort_match_kein_treffer(self, registry):
        """Kein Mehrwort-Match."""
        tokens = ["berlin", "test"]
        result = registry.match_multi_word(tokens, 0, "datum")
        assert result is None

    def test_mehrwort_regex_match(self, registry):
        """Mehrwort-Regex-Match (z.B. '5 minuten')."""
        tokens = ["5", "minuten"]
        result = registry.match_multi_word(tokens, 0, "dauer")
        assert result is not None
        assert result[0] == "5 minuten"
        assert result[1] == 2

    def test_entity_types(self, registry):
        """entity_types sollte alle registrierten Typen listen."""
        types = registry.entity_types
        assert "datum" in types
        assert "zeit" in types
        assert "dauer" in types
        assert "stadt" in types
        assert "person" in types

    def test_load_from_dict_leer(self):
        """Leeres Dict sollte keine Fehler verursachen."""
        r = EntityRegistry()
        r.load_from_dict({})
        assert r.entity_types == []


# ============================================================================
# EntityResolver — Datum
# ============================================================================

class TestResolveDatum:
    """Tests fuer den Datum-Resolver."""

    def test_heute(self, resolver):
        """'heute' sollte heutiges Datum ergeben."""
        result = resolver.resolve("heute", "datum")
        assert isinstance(result, ResolvedEntity)
        assert result.entity_type == "datum"
        assert result.value == date.today()
        assert result.formatted["iso"] == date.today().isoformat()
        assert result.formatted["tts"] == "heute"

    def test_morgen(self, resolver):
        """'morgen' sollte morgiges Datum ergeben."""
        result = resolver.resolve("morgen", "datum")
        assert result.value == date.today() + timedelta(days=1)
        assert result.formatted["tts"] == "morgen"

    def test_uebermorgen(self, resolver):
        """'uebermorgen' sollte uebermorgen ergeben."""
        result = resolver.resolve("uebermorgen", "datum")
        assert result.value == date.today() + timedelta(days=2)
        assert result.formatted["tts"] == "uebermorgen"

    def test_uebermorgen_umlaut(self, resolver):
        """'übermorgen' mit Umlaut sollte auch funktionieren."""
        result = resolver.resolve("übermorgen", "datum")
        assert result.value == date.today() + timedelta(days=2)

    def test_wochentag(self, resolver):
        """Wochentag sollte naechstes Vorkommen ergeben."""
        result = resolver.resolve("montag", "datum")
        assert result.value.weekday() == 0  # Montag
        assert result.value > date.today()

    def test_am_wochenende(self, resolver):
        """'am wochenende' sollte naechsten Samstag ergeben."""
        result = resolver.resolve("am wochenende", "datum")
        assert result.value.weekday() == 5  # Samstag

    def test_absolutes_datum(self, resolver):
        """'15.03.' sollte korrekt geparst werden."""
        result = resolver.resolve("15.03.", "datum")
        assert result.value.day == 15
        assert result.value.month == 3

    def test_absolutes_datum_mit_jahr(self, resolver):
        """'15.03.2027' sollte korrekt geparst werden."""
        result = resolver.resolve("15.03.2027", "datum")
        assert result.value == date(2027, 3, 15)

    def test_formatted_eu(self, resolver):
        """EU-Format sollte DD.MM.YYYY sein."""
        result = resolver.resolve("heute", "datum")
        assert result.formatted["eu"] == date.today().strftime("%d.%m.%Y")

    def test_formatted_api(self, resolver):
        """API-Format sollte ISO sein."""
        result = resolver.resolve("morgen", "datum")
        expected = (date.today() + timedelta(days=1)).isoformat()
        assert result.formatted["api"] == expected

    def test_morgen_ist_today_plus_1(self, resolver):
        """'morgen' muss exakt date.today() + timedelta(days=1) sein."""
        today = date.today()
        expected = today + timedelta(days=1)
        result = resolver.resolve("morgen", "datum")
        assert result.value == expected, (
            f"'morgen' sollte {expected.isoformat()} sein, "
            f"aber ist {result.value}"
        )
        assert result.formatted["iso"] == expected.isoformat()
        assert result.formatted["api"] == expected.isoformat()

    def test_heute_ist_today(self, resolver):
        """'heute' muss exakt date.today() sein."""
        expected = date.today()
        result = resolver.resolve("heute", "datum")
        assert result.value == expected

    def test_uebermorgen_ist_today_plus_2(self, resolver):
        """'uebermorgen' muss exakt date.today() + 2 sein."""
        expected = date.today() + timedelta(days=2)
        result = resolver.resolve("uebermorgen", "datum")
        assert result.value == expected

    def test_wochentag_ist_in_zukunft_und_korrekt(self, resolver):
        """Wochentag muss in der Zukunft liegen und der richtige Wochentag sein."""
        today = date.today()
        for name, weekday_num in [
            ("montag", 0), ("dienstag", 1), ("mittwoch", 2),
            ("donnerstag", 3), ("freitag", 4), ("samstag", 5), ("sonntag", 6),
        ]:
            result = resolver.resolve(name, "datum")
            assert result.value.weekday() == weekday_num, (
                f"'{name}' sollte Wochentag {weekday_num} sein, "
                f"aber ist {result.value.weekday()}"
            )
            assert result.value > today, (
                f"'{name}' sollte nach heute ({today}) liegen"
            )
            # Maximal 7 Tage in der Zukunft
            assert (result.value - today).days <= 7

    def test_morgen_formatted_outputs(self, resolver):
        """'morgen' muss alle Formatvarianten korrekt liefern."""
        result = resolver.resolve("morgen", "datum")
        tomorrow = date.today() + timedelta(days=1)
        assert result.formatted["iso"] == tomorrow.isoformat()
        assert result.formatted["eu"] == tomorrow.strftime("%d.%m.%Y")
        assert result.formatted["tts"] == "morgen"
        assert result.formatted["api"] == tomorrow.isoformat()

    def test_unbekannter_wert(self, resolver):
        """Unbekannter Wert sollte Fallback liefern."""
        result = resolver.resolve("xyz", "datum")
        assert result.entity_type == "datum"
        assert result.value == "xyz"  # Generischer Resolver

    def test_raw_erhalten(self, resolver):
        """Rohwert sollte erhalten bleiben."""
        result = resolver.resolve("morgen", "datum")
        assert result.raw == "morgen"


# ============================================================================
# EntityResolver — Zeit
# ============================================================================

class TestResolveZeit:
    """Tests fuer den Zeit-Resolver."""

    def test_mittag(self, resolver):
        """'mittag' sollte 12:00 ergeben."""
        result = resolver.resolve("mittag", "zeit")
        assert result.value == time(12, 0)
        assert result.formatted["24h"] == "12:00"
        assert result.formatted["tts"] == "12 Uhr"

    def test_mitternacht(self, resolver):
        """'mitternacht' sollte 00:00 ergeben."""
        result = resolver.resolve("mitternacht", "zeit")
        assert result.value == time(0, 0)

    def test_uhrzeit_format(self, resolver):
        """'15 uhr' sollte korrekt geparst werden."""
        result = resolver.resolve("15 uhr", "zeit")
        assert result.value == time(15, 0)
        assert result.formatted["tts"] == "15 Uhr"

    def test_uhrzeit_mit_minuten(self, resolver):
        """'15:30' sollte korrekt geparst werden."""
        result = resolver.resolve("15:30", "zeit")
        assert result.value == time(15, 30)
        assert result.formatted["24h"] == "15:30"

    def test_uhrzeit_uhr_minuten(self, resolver):
        """'15 uhr 30' sollte korrekt geparst werden."""
        result = resolver.resolve("15 uhr 30", "zeit")
        assert result.value == time(15, 30)

    def test_halb_drei(self, resolver):
        """'halb drei' sollte 2:30 ergeben."""
        result = resolver.resolve("halb drei", "zeit")
        assert result.value == time(2, 30)

    def test_abend(self, resolver):
        """'abend' sollte 18:00 ergeben."""
        result = resolver.resolve("abend", "zeit")
        assert result.value == time(18, 0)

    def test_unbekannte_zeit(self, resolver):
        """Unbekannte Zeitangabe sollte Fallback liefern."""
        result = resolver.resolve("xyz", "zeit")
        assert result.entity_type == "zeit"
        assert result.value == "xyz"


# ============================================================================
# EntityResolver — Dauer
# ============================================================================

class TestResolveDauer:
    """Tests fuer den Dauer-Resolver."""

    def test_minuten(self, resolver):
        """'5 minuten' sollte 300 Sekunden ergeben."""
        result = resolver.resolve("5 minuten", "dauer")
        assert result.value == 300
        assert result.formatted["seconds"] == "300"
        assert result.formatted["minutes"] == "5"
        assert result.formatted["tts"] == "5 Minuten"

    def test_sekunden(self, resolver):
        """'30 sekunden' sollte 30 Sekunden ergeben."""
        result = resolver.resolve("30 sekunden", "dauer")
        assert result.value == 30
        assert result.formatted["seconds"] == "30"
        assert result.formatted["tts"] == "30 Sekunden"

    def test_stunden(self, resolver):
        """'2 stunden' sollte 7200 Sekunden ergeben."""
        result = resolver.resolve("2 stunden", "dauer")
        assert result.value == 7200
        assert result.formatted["hours"] == "2"
        assert result.formatted["tts"] == "2 Stunden"

    def test_eine_minute(self, resolver):
        """'eine minute' sollte 60 Sekunden ergeben."""
        result = resolver.resolve("eine minute", "dauer")
        assert result.value == 60

    def test_eine_halbe_stunde(self, resolver):
        """'eine halbe stunde' sollte 1800 Sekunden ergeben."""
        result = resolver.resolve("eine halbe stunde", "dauer")
        assert result.value == 1800
        assert result.formatted["minutes"] == "30"

    def test_eine_stunde(self, resolver):
        """'eine stunde' sollte 3600 Sekunden ergeben."""
        result = resolver.resolve("eine stunde", "dauer")
        assert result.value == 3600

    def test_1_sekunde(self, resolver):
        """'1 sekunde' sollte 1 Sekunde ergeben."""
        result = resolver.resolve("1 sekunde", "dauer")
        assert result.value == 1
        assert result.formatted["tts"] == "1 Sekunde"

    def test_unbekannte_dauer(self, resolver):
        """Unbekannte Dauer sollte Fallback liefern."""
        result = resolver.resolve("xyz", "dauer")
        assert result.entity_type == "dauer"
        assert result.value == "xyz"


# ============================================================================
# EntityResolver — Generisch
# ============================================================================

class TestResolveGeneric:
    """Tests fuer den generischen Resolver."""

    def test_unbekannter_entity_typ(self, resolver):
        """Unbekannter Entity-Typ sollte generisch aufgeloest werden."""
        result = resolver.resolve("test", "unbekannt")
        assert result.entity_type == "unbekannt"
        assert result.value == "test"
        assert result.formatted["raw"] == "test"

    def test_stadt(self, resolver):
        """Stadt (offene Entity, kein spezieller Resolver) → generisch."""
        result = resolver.resolve("berlin", "stadt")
        assert result.entity_type == "stadt"
        assert result.value == "berlin"

    def test_raw_wird_getrimmt(self, resolver):
        """Rohwert wird getrimmt."""
        result = resolver.resolve("  berlin  ", "stadt")
        assert result.value == "berlin"


# ============================================================================
# Hilfsfunktionen
# ============================================================================

class TestHilfsfunktionen:
    """Tests fuer interne Hilfsfunktionen."""

    def test_next_weekday(self):
        """Naechster Wochentag berechnen."""
        today = date.today()
        # Naechster Montag
        result = _next_weekday(today, 0)
        assert result.weekday() == 0
        assert result > today

    def test_parse_absolute_date_dd_mm(self):
        """Absolutes Datum DD.MM. parsen."""
        result = _parse_absolute_date("15.03.")
        assert result is not None
        assert result.day == 15
        assert result.month == 3

    def test_parse_absolute_date_dd_mm_yyyy(self):
        """Absolutes Datum DD.MM.YYYY parsen."""
        result = _parse_absolute_date("15.03.2027")
        assert result == date(2027, 3, 15)

    def test_datum_mit_monatname(self):
        """'5 mai' sollte ein Datum mit Tag 5, Monat 5 ergeben."""
        result = _parse_absolute_date("5 mai")
        assert result is not None
        assert result.day == 5
        assert result.month == 5

    def test_datum_mit_monatname_vergangenheit(self):
        """Vergangenes Datum mit Monatsname sollte naechstes Jahr ergeben."""
        today = date.today()
        # Waehle ein Datum das sicher in der Vergangenheit liegt
        past_month = today.month - 1 if today.month > 1 else 12
        past_day = 1
        result = _parse_absolute_date(f"{past_day} {_get_month_name(past_month)}")
        assert result is not None
        if past_month < today.month or (past_month == today.month and past_day < today.day):
            assert result.year == today.year + 1
        else:
            assert result.year == today.year

    def test_datum_maerz_varianten(self):
        """'maerz' und 'märz' sollten beide als Maerz erkannt werden."""
        result1 = _parse_absolute_date("1 maerz")
        result2 = _parse_absolute_date("1 märz")
        assert result1 is not None
        assert result2 is not None
        assert result1.month == 3
        assert result2.month == 3
        assert result1 == result2

    def test_parse_absolute_date_ungueltig(self):
        """Ungueltiges Datum sollte None ergeben."""
        assert _parse_absolute_date("abc") is None
        assert _parse_absolute_date("32.13.") is None

    def test_parse_time_string_hh_mm(self):
        """Zeitformat HH:MM parsen."""
        assert _parse_time_string("15:30") == (15, 30)
        assert _parse_time_string("9:00") == (9, 0)

    def test_parse_time_string_hh_uhr(self):
        """Zeitformat 'HH Uhr' parsen."""
        assert _parse_time_string("15 uhr") == (15, 0)

    def test_parse_time_string_hh_uhr_mm(self):
        """Zeitformat 'HH Uhr MM' parsen."""
        assert _parse_time_string("15 uhr 30") == (15, 30)

    def test_parse_time_string_halb(self):
        """'halb drei' → (2, 30)."""
        assert _parse_time_string("halb drei") == (2, 30)

    def test_parse_time_string_ungueltig(self):
        """Ungueltiger Zeitstring sollte None ergeben."""
        assert _parse_time_string("abc") is None

    def test_format_date_tts(self):
        """TTS-Formatierung fuer Datum."""
        today = date.today()
        assert _format_date_tts(today) == "heute"
        assert _format_date_tts(today + timedelta(days=1)) == "morgen"
        assert _format_date_tts(today + timedelta(days=2)) == "uebermorgen"

    def test_format_time_tts(self):
        """TTS-Formatierung fuer Zeit."""
        assert _format_time_tts(time(15, 0)) == "15 Uhr"
        assert _format_time_tts(time(15, 30)) == "15 Uhr 30"

    def test_format_duration_tts(self):
        """TTS-Formatierung fuer Dauer."""
        assert _format_duration_tts(30) == "30 Sekunden"
        assert _format_duration_tts(1) == "1 Sekunde"
        assert _format_duration_tts(60) == "1 Minute"
        assert _format_duration_tts(300) == "5 Minuten"
        assert _format_duration_tts(3600) == "1 Stunde"
        assert _format_duration_tts(7200) == "2 Stunden"
        assert _format_duration_tts(5400) == "1 Stunde 30 Minuten"


# ============================================================================
# Integration: Matcher + Entities
# ============================================================================

class TestMatcherIntegration:
    """Integrationstests: KeywordMatcher mit Entity-System."""

    @pytest.fixture
    def entity_matcher(self, registry):
        """Matcher mit Entity-Registry."""
        from trixy_core.nlp.keyword_matcher import KeywordIntentMatcher

        m = KeywordIntentMatcher()
        m.set_entity_registry(registry)
        return m

    def test_datum_slot_match(self, entity_matcher):
        """Pattern mit {date:datum} sollte 'morgen' matchen."""
        entity_matcher.compile_intents([{
            "name": "weather_forecast",
            "patterns": ["wetter {date:datum}"],
        }])
        result = entity_matcher.match("Wetter morgen")
        assert result is not None
        assert result.intent == "weather_forecast"
        assert "date" in result.slots
        slot = result.slots["date"]
        assert isinstance(slot, ResolvedEntity)
        assert slot.entity_type == "datum"
        assert slot.value == date.today() + timedelta(days=1)

    def test_datum_slot_strikt_ablehnung(self, entity_matcher):
        """Pattern mit {date:datum} sollte unbekannte Werte ablehnen."""
        entity_matcher.compile_intents([{
            "name": "weather_forecast",
            "patterns": ["wetter {date:datum}"],
        }])
        result = entity_matcher.match("Wetter xyz")
        assert result is None

    def test_stadt_slot_offen(self, entity_matcher):
        """Pattern mit {city:stadt} sollte beliebige Werte akzeptieren."""
        entity_matcher.compile_intents([{
            "name": "current_weather",
            "patterns": ["wetter [in] {city:stadt}"],
        }])
        result = entity_matcher.match("Wetter in Tokyo")
        assert result is not None
        assert "city" in result.slots
        slot = result.slots["city"]
        assert isinstance(slot, ResolvedEntity)
        assert slot.value == "tokyo"

    def test_stadt_slot_bekannter_wert(self, entity_matcher):
        """Bekannter Stadtwert sollte gematcht werden."""
        entity_matcher.compile_intents([{
            "name": "current_weather",
            "patterns": ["wetter [in] {city:stadt}"],
        }])
        result = entity_matcher.match("Wetter in Berlin")
        assert result is not None
        assert "city" in result.slots

    def test_dauer_slot_match(self, entity_matcher):
        """Pattern mit {duration:dauer} sollte '5 minuten' matchen."""
        entity_matcher.compile_intents([{
            "name": "set_timer",
            "patterns": ["timer {duration:dauer}"],
        }])
        result = entity_matcher.match("Timer 5 Minuten")
        assert result is not None
        assert "duration" in result.slots
        slot = result.slots["duration"]
        assert isinstance(slot, ResolvedEntity)
        assert slot.value == 300

    def test_slot_ohne_entity_typ(self, entity_matcher):
        """Slot ohne Entity-Typ sollte wie bisher als String funktionieren."""
        entity_matcher.compile_intents([{
            "name": "volume_set",
            "patterns": ["lautstaerke [auf] {level}"],
        }])
        result = entity_matcher.match("Lautstärke auf 50")
        assert result is not None
        assert "level" in result.slots
        assert isinstance(result.slots["level"], str)

    def test_pattern_mit_entity_typ_parse(self, entity_matcher):
        """Slot mit Entity-Typ sollte korrekt geparst werden."""
        from trixy_core.nlp.keyword_matcher import PatternToken
        tokens = entity_matcher._parse_pattern("{date:datum}")
        assert len(tokens) == 1
        assert tokens[0].kind == "slot"
        assert tokens[0].slot_name == "date"
        assert tokens[0].entity_type == "datum"

    def test_dauer_slot_strikt_ablehnung(self, entity_matcher):
        """Pattern mit {duration:dauer} sollte 'xyz' ablehnen."""
        entity_matcher.compile_intents([{
            "name": "set_timer",
            "patterns": ["timer {duration:dauer}"],
        }])
        result = entity_matcher.match("Timer xyz")
        assert result is None

    def test_wetter_morgen_resolved_date(self, entity_matcher):
        """'Wetter morgen' → ResolvedEntity mit date.today() + 1."""
        entity_matcher.compile_intents([{
            "name": "weather_forecast",
            "patterns": ["wetter {date:datum}"],
        }])
        result = entity_matcher.match("Wetter morgen")
        assert result is not None
        assert result.intent == "weather_forecast"
        slot = result.slots["date"]
        assert isinstance(slot, ResolvedEntity)
        tomorrow = date.today() + timedelta(days=1)
        assert slot.value == tomorrow, (
            f"'morgen' sollte {tomorrow.isoformat()} sein, "
            f"aber ist {slot.value}"
        )

    def test_wetter_montag_resolved_date(self, entity_matcher):
        """'Wetter Montag' → ResolvedEntity mit naechstem Montag."""
        entity_matcher.compile_intents([{
            "name": "weather_forecast",
            "patterns": ["wetter {date:datum}"],
        }])
        result = entity_matcher.match("Wetter Montag")
        assert result is not None
        slot = result.slots["date"]
        assert isinstance(slot, ResolvedEntity)
        assert slot.value.weekday() == 0  # Montag
        assert slot.value > date.today()

    def test_wie_wird_am_montag_das_wetter(self, entity_matcher):
        """'Wie wird am Montag das Wetter' → weather_forecast mit Montag."""
        entity_matcher.compile_intents([{
            "name": "weather_forecast",
            "patterns": [
                "wie wird {das|} [am] {date:datum} [das] wetter",
                "wie wird [das] wetter [am] {date:datum}",
            ],
        }, {
            "name": "current_weather",
            "patterns": [
                "(wie ist|wie wird) [denn] {das|} wetter [draussen|gerade|heute]",
            ],
        }])
        result = entity_matcher.match("Wie wird am Montag das Wetter")
        assert result is not None
        assert result.intent == "weather_forecast"
        slot = result.slots["date"]
        assert isinstance(slot, ResolvedEntity)
        assert slot.value.weekday() == 0  # Montag
        assert slot.value > date.today()


# ============================================================================
# Hilfsfunktionen fuer Tests
# ============================================================================

def _get_month_name(month: int) -> str:
    """Gibt den deutschen Monatsnamen (lowercase) fuer Tests zurueck."""
    names = [
        "", "januar", "februar", "maerz", "april", "mai", "juni",
        "juli", "august", "september", "oktober", "november", "dezember",
    ]
    return names[month]