# -*- coding: utf-8 -*-
"""
Tests für Satellite-Extensions.

Testet:
- Groups: SatelliteGroup, GroupManager
- Zones: Zone, ZoneManager
- LoadBalancing: Strategien und LoadBalancer
- Health: HealthScorer, HealthMetrics, Thresholds
- Failover: FailoverManager, BackupRegistry
"""

import asyncio
from datetime import datetime, timedelta
from unittest.mock import MagicMock, AsyncMock

import pytest


# ============================================================================
# Mock-Satellite für Tests
# ============================================================================

class MockSatellite:
    """Mock-Satellite für Tests."""

    def __init__(
        self,
        satellite_id: str,
        room_id: str = "default",
        is_connected: bool = True,
    ):
        self.id = satellite_id
        self.room_id = room_id
        self.is_connected = is_connected
        self.last_heartbeat = datetime.now()
        self.active_requests = 0
        self.response_time_ms = 50.0

    def __repr__(self) -> str:
        return f"MockSatellite(id={self.id!r})"


# ============================================================================
# Group Tests
# ============================================================================

class TestSatelliteGroup:
    """Tests für SatelliteGroup."""

    def test_create_group(self):
        """Test Gruppe erstellen."""
        from trixy_core.satellite.groups import SatelliteGroup, GroupType

        group = SatelliteGroup(
            group_id="test_group",
            name="Test Gruppe",
            group_type=GroupType.CUSTOM
        )

        assert group.id == "test_group"
        assert group.name == "Test Gruppe"
        assert group.group_type == GroupType.CUSTOM
        assert group.size == 0
        assert group.is_empty

    def test_add_satellite(self):
        """Test Satellite hinzufügen."""
        from trixy_core.satellite.groups import SatelliteGroup

        group = SatelliteGroup("test")
        sat = MockSatellite("sat1")

        assert group.add(sat) is True
        assert group.size == 1
        assert not group.is_empty
        assert group.contains("sat1")

        # Duplikat verhindern
        assert group.add(sat) is False
        assert group.size == 1

    def test_remove_satellite(self):
        """Test Satellite entfernen."""
        from trixy_core.satellite.groups import SatelliteGroup

        group = SatelliteGroup("test")
        sat = MockSatellite("sat1")
        group.add(sat)

        removed = group.remove("sat1")
        assert removed is sat
        assert group.size == 0

        # Nicht vorhanden
        assert group.remove("not_found") is None

    def test_max_members(self):
        """Test maximale Mitglieder."""
        from trixy_core.satellite.groups import SatelliteGroup, GroupConfig

        config = GroupConfig(max_members=2)
        group = SatelliteGroup("test", config=config)

        assert group.add(MockSatellite("sat1")) is True
        assert group.add(MockSatellite("sat2")) is True
        assert group.add(MockSatellite("sat3")) is False
        assert group.size == 2

    def test_filter_satellites(self):
        """Test Satellite-Filter."""
        from trixy_core.satellite.groups import SatelliteGroup

        group = SatelliteGroup("test")
        group.add(MockSatellite("sat1", is_connected=True))
        group.add(MockSatellite("sat2", is_connected=False))
        group.add(MockSatellite("sat3", is_connected=True))

        connected = group.filter(lambda s: s.is_connected)
        assert len(connected) == 2

        disconnected = group.filter(lambda s: not s.is_connected)
        assert len(disconnected) == 1

    def test_get_connected(self):
        """Test verbundene Satellites."""
        from trixy_core.satellite.groups import SatelliteGroup

        group = SatelliteGroup("test")
        group.add(MockSatellite("sat1", is_connected=True))
        group.add(MockSatellite("sat2", is_connected=False))

        connected = group.get_connected()
        assert len(connected) == 1
        assert connected[0].id == "sat1"

    def test_group_criteria(self):
        """Test automatische Zuordnung mit Kriterium."""
        from trixy_core.satellite.groups import SatelliteGroup

        group = SatelliteGroup(
            "room_test",
            criteria=lambda s: s.room_id == "wohnzimmer"
        )

        sat1 = MockSatellite("sat1", room_id="wohnzimmer")
        sat2 = MockSatellite("sat2", room_id="küche")

        assert group.matches(sat1) is True
        assert group.matches(sat2) is False

    def test_contains_operator(self):
        """Test __contains__ Operator."""
        from trixy_core.satellite.groups import SatelliteGroup

        group = SatelliteGroup("test")
        sat = MockSatellite("sat1")
        group.add(sat)

        assert "sat1" in group
        assert sat in group
        assert "sat2" not in group

    def test_iteration(self):
        """Test Iteration über Gruppe."""
        from trixy_core.satellite.groups import SatelliteGroup

        group = SatelliteGroup("test")
        group.add(MockSatellite("sat1"))
        group.add(MockSatellite("sat2"))

        ids = [s.id for s in group]
        assert "sat1" in ids
        assert "sat2" in ids

    def test_to_dict(self):
        """Test Serialisierung."""
        from trixy_core.satellite.groups import SatelliteGroup, GroupType

        group = SatelliteGroup("test", "Test Gruppe", GroupType.ROOM)
        group.add(MockSatellite("sat1"))

        data = group.to_dict()
        assert data["id"] == "test"
        assert data["name"] == "Test Gruppe"
        assert data["type"] == "ROOM"
        assert "sat1" in data["members"]


class TestGroupManager:
    """Tests für GroupManager."""

    def test_create_group(self):
        """Test Gruppe erstellen."""
        from trixy_core.satellite.groups import GroupManager, GroupType

        manager = GroupManager()
        group = manager.create("test", "Test Gruppe", GroupType.CUSTOM)

        assert group.id == "test"
        assert manager.count == 1
        assert "test" in manager

    def test_create_duplicate_fails(self):
        """Test Duplikat-Erstellung verhindert."""
        from trixy_core.satellite.groups import GroupManager

        manager = GroupManager()
        manager.create("test")

        with pytest.raises(ValueError):
            manager.create("test")

    def test_create_room_group(self):
        """Test Raum-Gruppe erstellen."""
        from trixy_core.satellite.groups import GroupManager, GroupType

        manager = GroupManager()
        group = manager.create_room_group("wohnzimmer", "Wohnzimmer")

        assert group.group_type == GroupType.ROOM
        assert group.id == "room:wohnzimmer"

        # Über room_id abrufen
        assert manager.get_by_room("wohnzimmer") is group

    def test_create_zone_group(self):
        """Test Zone-Gruppe erstellen."""
        from trixy_core.satellite.groups import GroupManager, GroupType

        manager = GroupManager()
        group = manager.create_zone_group(
            "erdgeschoss",
            "Erdgeschoss",
            rooms=["wohnzimmer", "küche"]
        )

        assert group.group_type == GroupType.ZONE
        assert group.id == "zone:erdgeschoss"

        # Kriterium testen
        sat1 = MockSatellite("sat1", room_id="wohnzimmer")
        sat2 = MockSatellite("sat2", room_id="bad")

        assert group.matches(sat1) is True
        assert group.matches(sat2) is False

    def test_auto_assign(self):
        """Test automatische Zuordnung."""
        from trixy_core.satellite.groups import GroupManager

        manager = GroupManager()
        manager.create_room_group("wohnzimmer")
        manager.create_room_group("küche")

        sat = MockSatellite("sat1", room_id="wohnzimmer")
        assigned = manager.auto_assign(sat)

        assert "room:wohnzimmer" in assigned
        assert "room:küche" not in assigned

    def test_get_groups_for_satellite(self):
        """Test Gruppen für Satellite abrufen."""
        from trixy_core.satellite.groups import GroupManager

        manager = GroupManager()
        g1 = manager.create("group1")
        g2 = manager.create("group2")

        sat = MockSatellite("sat1")
        g1.add(sat)
        g2.add(sat)

        groups = manager.get_groups_for_satellite("sat1")
        assert len(groups) == 2

    def test_delete_group(self):
        """Test Gruppe löschen."""
        from trixy_core.satellite.groups import GroupManager

        manager = GroupManager()
        manager.create("test")

        deleted = manager.delete("test")
        assert deleted is not None
        assert "test" not in manager

    def test_find_groups(self):
        """Test Gruppen suchen."""
        from trixy_core.satellite.groups import GroupManager, GroupType

        manager = GroupManager()
        manager.create("g1", group_type=GroupType.ROOM)
        g2 = manager.create("g2", group_type=GroupType.ZONE)
        g2.add(MockSatellite("sat1", is_connected=True))

        # Nach Typ filtern
        rooms = manager.find_groups(group_type=GroupType.ROOM)
        assert len(rooms) == 1

        # Mit verbundenen Satellites
        with_connected = manager.find_groups(has_connected=True)
        assert len(with_connected) == 1


# ============================================================================
# Zone Tests
# ============================================================================

class TestZone:
    """Tests für Zone."""

    def test_create_zone(self):
        """Test Zone erstellen."""
        from trixy_core.satellite.groups import Zone

        zone = Zone(
            zone_id="erdgeschoss",
            name="Erdgeschoss",
            rooms=["wohnzimmer", "küche"]
        )

        assert zone.id == "erdgeschoss"
        assert zone.name == "Erdgeschoss"
        assert "wohnzimmer" in zone.rooms
        assert "küche" in zone.rooms

    def test_add_remove_room(self):
        """Test Raum hinzufügen/entfernen."""
        from trixy_core.satellite.groups import Zone

        zone = Zone("test")
        zone.add_room("flur")

        assert "flur" in zone.rooms

        zone.remove_room("flur")
        assert "flur" not in zone.rooms

    def test_zone_hierarchy(self):
        """Test Zone-Hierarchie."""
        from trixy_core.satellite.groups import Zone

        parent = Zone("haus", "Gesamtes Haus")
        child = Zone("erdgeschoss", "Erdgeschoss", rooms=["wohnzimmer"])

        parent.add_child(child)

        assert child.parent is parent
        assert child in parent.children
        assert child.depth == 1
        assert parent.depth == 0
        assert parent.is_root
        assert not child.is_root

    def test_all_rooms_recursive(self):
        """Test alle Räume rekursiv."""
        from trixy_core.satellite.groups import Zone

        parent = Zone("haus", rooms=["garage"])
        child1 = Zone("eg", rooms=["wohnzimmer", "küche"])
        child2 = Zone("og", rooms=["schlafzimmer", "bad"])

        parent.add_child(child1)
        parent.add_child(child2)

        all_rooms = parent.all_rooms
        assert "garage" in all_rooms
        assert "wohnzimmer" in all_rooms
        assert "schlafzimmer" in all_rooms
        assert len(all_rooms) == 5

    def test_contains_room_recursive(self):
        """Test contains_room rekursiv."""
        from trixy_core.satellite.groups import Zone

        parent = Zone("haus")
        child = Zone("eg", rooms=["wohnzimmer"])
        parent.add_child(child)

        assert parent.contains_room("wohnzimmer", recursive=True)
        assert not parent.contains_room("wohnzimmer", recursive=False)
        assert "wohnzimmer" in parent  # __contains__ ist rekursiv

    def test_get_path(self):
        """Test Pfad zu Zone."""
        from trixy_core.satellite.groups import Zone

        root = Zone("haus")
        level1 = Zone("eg")
        level2 = Zone("wohnbereich")

        root.add_child(level1)
        level1.add_child(level2)

        path = level2.get_path()
        assert len(path) == 3
        assert path[0] is root
        assert path[2] is level2


class TestZoneManager:
    """Tests für ZoneManager."""

    def test_create_zone(self):
        """Test Zone erstellen."""
        from trixy_core.satellite.groups import ZoneManager

        manager = ZoneManager()
        zone = manager.create("test", "Test Zone", rooms=["raum1"])

        assert zone.id == "test"
        assert manager.count == 1
        assert "test" in manager

    def test_create_with_parent(self):
        """Test Zone mit Parent erstellen."""
        from trixy_core.satellite.groups import ZoneManager

        manager = ZoneManager()
        parent = manager.create("parent")
        child = manager.create("child", parent="parent")

        assert child.parent is parent
        assert child in parent.children

    def test_invalid_parent_raises(self):
        """Test ungültiger Parent wirft Fehler."""
        from trixy_core.satellite.groups import ZoneManager

        manager = ZoneManager()

        with pytest.raises(ValueError):
            manager.create("child", parent="nonexistent")

    def test_get_zone_for_room(self):
        """Test Zone für Raum finden."""
        from trixy_core.satellite.groups import ZoneManager

        manager = ZoneManager()
        zone = manager.create("eg", rooms=["wohnzimmer", "küche"])

        found = manager.get_zone_for_room("wohnzimmer")
        assert found is zone

        not_found = manager.get_zone_for_room("garage")
        assert not_found is None

    def test_move_room(self):
        """Test Raum verschieben."""
        from trixy_core.satellite.groups import ZoneManager

        manager = ZoneManager()
        z1 = manager.create("z1", rooms=["raum1"])
        z2 = manager.create("z2")

        assert manager.move_room("raum1", "z2") is True
        assert "raum1" not in z1.rooms
        assert "raum1" in z2.rooms

    def test_delete_zone(self):
        """Test Zone löschen."""
        from trixy_core.satellite.groups import ZoneManager

        manager = ZoneManager()
        manager.create("test")

        deleted = manager.delete("test")
        assert deleted is not None
        assert "test" not in manager

    def test_delete_recursive(self):
        """Test rekursives Löschen."""
        from trixy_core.satellite.groups import ZoneManager

        manager = ZoneManager()
        manager.create("parent")
        manager.create("child1", parent="parent")
        manager.create("child2", parent="parent")

        manager.delete("parent", recursive=True)

        assert manager.count == 0

    def test_get_hierarchy(self):
        """Test Hierarchie abrufen."""
        from trixy_core.satellite.groups import ZoneManager

        manager = ZoneManager()
        manager.create("root1", rooms=["r1"])
        manager.create("child", parent="root1", rooms=["r2"])
        manager.create("root2", rooms=["r3"])

        hierarchy = manager.get_hierarchy()
        assert len(hierarchy["root_zones"]) == 2


# ============================================================================
# LoadBalancing Tests
# ============================================================================

class TestLoadBalancingStrategy:
    """Tests für Load-Balancing-Strategien."""

    def test_round_robin(self):
        """Test Round-Robin-Strategie."""
        from trixy_core.satellite.loadbalancing import RoundRobinStrategy

        strategy = RoundRobinStrategy()
        satellites = [
            MockSatellite("sat1"),
            MockSatellite("sat2"),
            MockSatellite("sat3"),
        ]

        # Sollte in Reihenfolge durchgehen
        results = []
        for _ in range(6):
            result = strategy.select(satellites)
            results.append(result.satellite.id)

        # Jeder Satellite sollte 2x vorkommen
        assert results.count("sat1") == 2
        assert results.count("sat2") == 2
        assert results.count("sat3") == 2

    def test_round_robin_handles_removed_satellite(self):
        """Test Round-Robin bei entferntem Satellite."""
        from trixy_core.satellite.loadbalancing import RoundRobinStrategy

        strategy = RoundRobinStrategy()
        satellites = [MockSatellite("sat1"), MockSatellite("sat2")]

        strategy.select(satellites)  # sat1

        # Satellite entfernen
        satellites = [MockSatellite("sat2")]
        result = strategy.select(satellites)

        assert result.satellite.id == "sat2"

    def test_round_robin_empty_list(self):
        """Test Round-Robin mit leerer Liste."""
        from trixy_core.satellite.loadbalancing import RoundRobinStrategy

        strategy = RoundRobinStrategy()
        result = strategy.select([])

        assert result is None

    def test_least_connections(self):
        """Test Least-Connections-Strategie."""
        from trixy_core.satellite.loadbalancing import LeastConnectionsStrategy

        strategy = LeastConnectionsStrategy()
        satellites = [
            MockSatellite("sat1"),
            MockSatellite("sat2"),
            MockSatellite("sat3"),
        ]

        # Initial alle gleich, erstes ausgewählt
        result1 = strategy.select(satellites)
        strategy.on_request_start(result1.satellite)

        # Jetzt sollte sat2 oder sat3 gewählt werden (weniger Connections)
        result2 = strategy.select(satellites)
        assert result2.satellite.id != "sat1"

    def test_least_connections_end_request(self):
        """Test Least-Connections Connection-Tracking."""
        from trixy_core.satellite.loadbalancing import LeastConnectionsStrategy

        strategy = LeastConnectionsStrategy()
        sat = MockSatellite("sat1")

        strategy.on_request_start(sat)
        assert strategy.get_connection_count("sat1") == 1

        strategy.on_request_end(sat)
        assert strategy.get_connection_count("sat1") == 0

    def test_weighted_strategy(self):
        """Test Weighted-Strategie."""
        from trixy_core.satellite.loadbalancing import WeightedStrategy, WeightConfig

        strategy = WeightedStrategy()

        # Hohe Gewichtung für sat1
        strategy.set_weight("sat1", WeightConfig(weight=10.0))
        strategy.set_weight("sat2", WeightConfig(weight=1.0))

        satellites = [MockSatellite("sat1"), MockSatellite("sat2")]

        # sat1 sollte deutlich öfter gewählt werden
        counts = {"sat1": 0, "sat2": 0}
        for _ in range(100):
            result = strategy.select(satellites)
            counts[result.satellite.id] += 1

        # sat1 sollte ca. 90% bekommen
        assert counts["sat1"] > counts["sat2"] * 5

    def test_weighted_zero_weight(self):
        """Test Weighted mit Gewicht 0."""
        from trixy_core.satellite.loadbalancing import WeightedStrategy, WeightConfig

        strategy = WeightedStrategy()
        strategy.set_weight("sat1", WeightConfig(weight=0.0))
        strategy.set_weight("sat2", WeightConfig(weight=1.0))

        satellites = [MockSatellite("sat1"), MockSatellite("sat2")]

        # Nur sat2 sollte gewählt werden
        for _ in range(10):
            result = strategy.select(satellites)
            assert result.satellite.id == "sat2"


class TestLoadBalancer:
    """Tests für LoadBalancer."""

    def test_load_balancer_select(self):
        """Test LoadBalancer Auswahl."""
        from trixy_core.satellite.loadbalancing import (
            LoadBalancer,
            RoundRobinStrategy
        )

        balancer = LoadBalancer(RoundRobinStrategy())
        satellites = [MockSatellite("sat1"), MockSatellite("sat2")]

        result = balancer.select(satellites)
        assert result is not None
        assert result.satellite.id in ["sat1", "sat2"]

    def test_load_balancer_filters_disconnected(self):
        """Test LoadBalancer filtert nicht verbundene automatisch."""
        from trixy_core.satellite.loadbalancing import (
            LoadBalancer,
            RoundRobinStrategy
        )

        balancer = LoadBalancer(RoundRobinStrategy())
        satellites = [
            MockSatellite("sat1", is_connected=False),
            MockSatellite("sat2", is_connected=True),
        ]

        # LoadBalancer filtert disconnected automatisch
        result = balancer.select(satellites)
        assert result.satellite.id == "sat2"

    def test_load_balancer_change_strategy(self):
        """Test Strategie-Wechsel."""
        from trixy_core.satellite.loadbalancing import (
            LoadBalancer,
            RoundRobinStrategy,
            LeastConnectionsStrategy
        )

        balancer = LoadBalancer(RoundRobinStrategy())
        assert balancer.strategy.name == "round_robin"

        # Strategie über Property-Setter ändern
        balancer.strategy = LeastConnectionsStrategy()
        assert balancer.strategy.name == "least_connections"


# ============================================================================
# Health Tests
# ============================================================================

class TestHealthMetrics:
    """Tests für HealthMetrics."""

    def test_create_metrics(self):
        """Test Metriken erstellen."""
        from trixy_core.satellite.health import HealthMetrics

        metrics = HealthMetrics(
            latency_ms=50.0,
            packet_loss=0.01,
            uptime=0.99,
        )

        assert metrics.latency_ms == 50.0
        assert metrics.packet_loss == 0.01
        assert metrics.uptime == 0.99

    def test_custom_metrics(self):
        """Test benutzerdefinierte Metriken."""
        from trixy_core.satellite.health import HealthMetrics

        metrics = HealthMetrics()
        metrics.custom_metrics["audio_quality"] = 0.95

        assert metrics.custom_metrics["audio_quality"] == 0.95


class TestHealthScorer:
    """Tests für HealthScorer."""

    def test_calculate_score(self):
        """Test Score-Berechnung."""
        from trixy_core.satellite.health import HealthScorer, HealthMetrics

        scorer = HealthScorer()
        metrics = HealthMetrics(
            latency_ms=50.0,
            packet_loss=0.0,
            uptime=1.0,
            error_rate=0.0,
        )

        # Metriken zuerst speichern
        scorer.update_metrics("sat1", metrics)
        score = scorer.calculate_score("sat1")

        # Bei perfekten Werten sollte Score hoch sein
        assert score.overall > 80

    def test_health_state_mapping(self):
        """Test Health-State-Zuordnung."""
        from trixy_core.satellite.health import (
            HealthScorer,
            HealthMetrics,
            HealthState
        )

        scorer = HealthScorer()

        # Gute Metriken -> HEALTHY
        good = HealthMetrics(latency_ms=20, packet_loss=0, uptime=1.0)
        scorer.update_metrics("sat_good", good)
        score = scorer.calculate_score("sat_good")
        assert score.state == HealthState.HEALTHY

        # Mittelmäßige Metriken -> DEGRADED
        degraded = HealthMetrics(latency_ms=500, packet_loss=0.2, uptime=0.5)
        scorer.update_metrics("sat_degraded", degraded)
        score = scorer.calculate_score("sat_degraded")
        assert score.state in [HealthState.DEGRADED, HealthState.UNHEALTHY]

        # Sehr schlechte Metriken -> CRITICAL oder UNHEALTHY
        critical = HealthMetrics(
            latency_ms=1000,
            packet_loss=0.5,
            uptime=0.3,
            error_rate=0.5,
            last_heartbeat_age=120.0,
        )
        scorer.update_metrics("sat_critical", critical)
        score = scorer.calculate_score("sat_critical")
        assert score.state in [HealthState.CRITICAL, HealthState.UNHEALTHY]

    def test_custom_weights(self):
        """Test benutzerdefinierte Gewichtung."""
        from trixy_core.satellite.health import HealthScorer, HealthMetrics

        scorer = HealthScorer(weights={
            "latency": 0.8,
            "packet_loss": 0.1,
            "uptime": 0.1,
        })

        metrics = HealthMetrics(latency_ms=200, packet_loss=0.0, uptime=1.0)
        scorer.update_metrics("sat1", metrics)
        score = scorer.calculate_score("sat1")

        # Mit hoher Latenz-Gewichtung sollte Score niedriger sein
        assert score.overall < 80

    def test_score_history(self):
        """Test Score-Historie."""
        from trixy_core.satellite.health import HealthScorer, HealthMetrics

        scorer = HealthScorer(history_size=5)

        for i in range(3):
            metrics = HealthMetrics(latency_ms=50 + i * 10)
            scorer.update_metrics("sat1", metrics)
            scorer.calculate_score("sat1")

        history = scorer.get_history("sat1")
        assert len(history) == 3


class TestHealthThresholds:
    """Tests für HealthThresholds."""

    def test_default_thresholds(self):
        """Test Standard-Schwellenwerte."""
        from trixy_core.satellite.health import HealthThresholds

        thresholds = HealthThresholds()

        # Sollte Default-Configs haben
        assert thresholds.get("latency_ms") is not None
        assert thresholds.get("packet_loss") is not None

    def test_add_threshold(self):
        """Test Schwellenwert hinzufügen."""
        from trixy_core.satellite.health import (
            HealthThresholds,
            ThresholdConfig
        )

        thresholds = HealthThresholds(use_defaults=False)
        config = ThresholdConfig(
            metric_name="custom_metric",
            warning_threshold=50.0,
            error_threshold=80.0,
        )

        thresholds.add(config)
        assert thresholds.get("custom_metric") is config

    def test_check_violations(self):
        """Test Schwellenwert-Verletzung erkennen."""
        from trixy_core.satellite.health import (
            HealthThresholds,
            HealthMetrics,
            ThresholdConfig,
            ViolationSeverity
        )

        thresholds = HealthThresholds(use_defaults=False)
        thresholds.add(ThresholdConfig(
            metric_name="latency_ms",
            warning_threshold=100.0,
            error_threshold=200.0,
            critical_threshold=500.0,
        ))

        # Über Warning-Schwelle
        metrics = HealthMetrics(latency_ms=150.0)
        violations = thresholds.check("sat1", metrics)

        assert len(violations) == 1
        assert violations[0].severity == ViolationSeverity.WARNING

    def test_violation_callback(self):
        """Test Callback bei Verletzung."""
        from trixy_core.satellite.health import (
            HealthThresholds,
            HealthMetrics,
            ThresholdConfig
        )

        thresholds = HealthThresholds(use_defaults=False)
        thresholds.add(ThresholdConfig(
            metric_name="latency_ms",
            warning_threshold=100.0,
        ))

        violations_received = []

        @thresholds.on_violation
        def handler(violation):
            violations_received.append(violation)

        metrics = HealthMetrics(latency_ms=150.0)
        thresholds.check("sat1", metrics)

        assert len(violations_received) == 1

    def test_cooldown(self):
        """Test Cooldown zwischen Alarmen."""
        from trixy_core.satellite.health import (
            HealthThresholds,
            HealthMetrics,
            ThresholdConfig
        )

        thresholds = HealthThresholds(use_defaults=False)
        thresholds.add(ThresholdConfig(
            metric_name="latency_ms",
            warning_threshold=100.0,
            cooldown=300.0,  # 5 Minuten
        ))

        metrics = HealthMetrics(latency_ms=150.0)

        # Erste Prüfung: Verletzung
        v1 = thresholds.check("sat1", metrics)
        assert len(v1) == 1

        # Zweite Prüfung: Cooldown aktiv, keine Verletzung
        v2 = thresholds.check("sat1", metrics)
        assert len(v2) == 0

        # Cooldown zurücksetzen
        thresholds.clear_cooldowns("sat1")
        v3 = thresholds.check("sat1", metrics)
        assert len(v3) == 1


# ============================================================================
# Failover Tests
# ============================================================================

class TestBackupRegistry:
    """Tests für BackupRegistry."""

    def test_assign_backup(self):
        """Test Backup zuweisen."""
        from trixy_core.satellite.failover import BackupRegistry

        registry = BackupRegistry()
        assignment = registry.assign("primary1", "backup1", priority=10)

        assert assignment.primary_id == "primary1"
        assert assignment.backup_id == "backup1"
        assert assignment.priority == 10

    def test_assign_self_fails(self):
        """Test Self-Assignment verhindert."""
        from trixy_core.satellite.failover import BackupRegistry

        registry = BackupRegistry()

        with pytest.raises(ValueError):
            registry.assign("sat1", "sat1")

    def test_multiple_backups_priority(self):
        """Test mehrere Backups nach Priorität."""
        from trixy_core.satellite.failover import BackupRegistry

        registry = BackupRegistry()
        registry.assign("primary", "backup1", priority=5)
        registry.assign("primary", "backup2", priority=10)
        registry.assign("primary", "backup3", priority=1)

        backups = registry.get_backups("primary")

        # Sollte nach Priorität sortiert sein
        assert backups[0].backup_id == "backup2"  # priority=10
        assert backups[1].backup_id == "backup1"  # priority=5
        assert backups[2].backup_id == "backup3"  # priority=1

    def test_get_best_backup(self):
        """Test bestes Backup abrufen."""
        from trixy_core.satellite.failover import BackupRegistry

        def get_satellite(sat_id):
            if sat_id == "backup1":
                return MockSatellite(sat_id, is_connected=False)
            return MockSatellite(sat_id, is_connected=True)

        registry = BackupRegistry(get_satellite=get_satellite)
        registry.assign("primary", "backup1", priority=10)  # disconnected
        registry.assign("primary", "backup2", priority=5)   # connected

        best = registry.get_best_backup("primary")

        # backup1 hat höhere Priorität aber ist disconnected
        assert best.backup_id == "backup2"

    def test_unassign_backup(self):
        """Test Backup-Zuweisung entfernen."""
        from trixy_core.satellite.failover import BackupRegistry

        registry = BackupRegistry()
        registry.assign("primary", "backup1")
        registry.assign("primary", "backup2")

        removed = registry.unassign("primary", "backup1")
        assert removed == 1

        backups = registry.get_backups("primary")
        assert len(backups) == 1

    def test_unassign_all(self):
        """Test alle Backups entfernen."""
        from trixy_core.satellite.failover import BackupRegistry

        registry = BackupRegistry()
        registry.assign("primary", "backup1")
        registry.assign("primary", "backup2")

        removed = registry.unassign("primary")
        assert removed == 2
        assert len(registry.get_backups("primary")) == 0

    def test_backup_strategies(self):
        """Test Backup-Strategien."""
        from trixy_core.satellite.failover import (
            BackupRegistry,
            BackupStrategy
        )

        def get_all():
            return [
                MockSatellite("sat1", room_id="room1"),
                MockSatellite("sat2", room_id="room1"),
                MockSatellite("sat3", room_id="room2"),
            ]

        def get_sat(sat_id):
            sats = {s.id: s for s in get_all()}
            return sats.get(sat_id)

        registry = BackupRegistry(
            default_strategy=BackupStrategy.SAME_ROOM,
            get_satellite=get_sat,
            get_all_satellites=get_all,
        )

        # sat1 sucht Backup in room1
        backup = registry.get_best_backup("sat1")
        assert backup is not None
        assert backup.backup_id == "sat2"  # Im selben Raum

    def test_update_health_score(self):
        """Test Health-Score für Backup-Auswahl."""
        from trixy_core.satellite.failover import (
            BackupRegistry,
            BackupStrategy
        )

        satellites = [
            MockSatellite("sat1"),
            MockSatellite("sat2"),
            MockSatellite("sat3"),
        ]

        registry = BackupRegistry(
            default_strategy=BackupStrategy.HEALTH_BASED,
            get_satellite=lambda id: next((s for s in satellites if s.id == id), None),
            get_all_satellites=lambda: satellites,
        )

        registry.update_health_score("sat2", 90.0)
        registry.update_health_score("sat3", 50.0)

        backup = registry.get_best_backup("sat1")
        assert backup.backup_id == "sat2"  # Höherer Health-Score


class TestFailoverManager:
    """Tests für FailoverManager."""

    @pytest.fixture
    def setup_manager(self):
        """Fixture für FailoverManager Setup."""
        from trixy_core.satellite.failover import (
            FailoverManager,
            FailoverConfig,
            BackupRegistry
        )

        satellites = {
            "primary1": MockSatellite("primary1"),
            "backup1": MockSatellite("backup1"),
            "backup2": MockSatellite("backup2"),
        }

        registry = BackupRegistry(
            get_satellite=lambda id: satellites.get(id),
            get_all_satellites=lambda: list(satellites.values()),
        )
        registry.assign("primary1", "backup1", priority=10)
        registry.assign("primary1", "backup2", priority=5)

        manager = FailoverManager(
            backup_registry=registry,
            config=FailoverConfig(detection_timeout=5.0),
            get_satellite=lambda id: satellites.get(id),
        )

        return manager, satellites

    @pytest.mark.asyncio
    async def test_trigger_failover(self, setup_manager):
        """Test Failover auslösen."""
        from trixy_core.satellite.failover import FailoverState

        manager, _ = setup_manager

        event = await manager.trigger_failover(
            "primary1",
            reason="Test-Failover"
        )

        assert event is not None
        assert event.primary_id == "primary1"
        assert event.backup_id == "backup1"  # Höchste Priorität
        assert event.state == FailoverState.ACTIVE

    @pytest.mark.asyncio
    async def test_failover_no_backup_available(self, setup_manager):
        """Test Failover ohne verfügbares Backup."""
        from trixy_core.satellite.failover import FailoverState

        manager, satellites = setup_manager

        # Beide Backups disconnecten
        satellites["backup1"].is_connected = False
        satellites["backup2"].is_connected = False

        event = await manager.trigger_failover("primary1")

        assert event.state == FailoverState.FAILED
        assert "Kein Backup" in event.reason

    @pytest.mark.asyncio
    async def test_failover_callback(self, setup_manager):
        """Test Failover-Callback."""
        manager, _ = setup_manager

        events_received = []

        @manager.on_failover
        async def handler(event):
            events_received.append(event)

        await manager.trigger_failover("primary1")

        assert len(events_received) == 1

    @pytest.mark.asyncio
    async def test_recover(self, setup_manager):
        """Test Recovery nach Failover."""
        from trixy_core.satellite.failover import FailoverState

        manager, satellites = setup_manager

        # Failover auslösen
        await manager.trigger_failover("primary1")
        assert "primary1" in manager.active_failovers

        # Recovery
        success = await manager.recover("primary1")
        assert success is True
        assert "primary1" not in manager.active_failovers

    @pytest.mark.asyncio
    async def test_prevent_duplicate_failover(self, setup_manager):
        """Test verhindert doppeltes Failover."""
        manager, _ = setup_manager

        event1 = await manager.trigger_failover("primary1")
        event2 = await manager.trigger_failover("primary1")

        # Sollte das gleiche Event zurückgeben
        assert event1 is event2

    @pytest.mark.asyncio
    async def test_get_history(self, setup_manager):
        """Test Failover-Historie."""
        manager, _ = setup_manager

        await manager.trigger_failover("primary1", reason="Test 1")
        await manager.recover("primary1")

        history = manager.get_history()
        assert len(history) >= 1

    def test_get_statistics(self, setup_manager):
        """Test Statistiken."""
        manager, _ = setup_manager

        stats = manager.get_statistics()

        assert "total_failovers" in stats
        assert "successful" in stats
        assert "failed" in stats
        assert "success_rate" in stats


# ============================================================================
# Integration Tests
# ============================================================================

class TestSatelliteExtensionsIntegration:
    """Integration-Tests für alle Satellite-Extensions."""

    def test_groups_with_loadbalancing(self):
        """Test Gruppen mit Load-Balancing."""
        from trixy_core.satellite.groups import SatelliteGroup
        from trixy_core.satellite.loadbalancing import (
            LoadBalancer,
            RoundRobinStrategy
        )

        group = SatelliteGroup("test")
        group.add(MockSatellite("sat1"))
        group.add(MockSatellite("sat2"))
        group.add(MockSatellite("sat3"))

        balancer = LoadBalancer(RoundRobinStrategy())

        # Load-Balancing über Gruppe
        result = balancer.select(group.get_connected())
        assert result is not None

    def test_health_triggers_failover(self):
        """Test Health löst Failover aus."""
        from trixy_core.satellite.health import (
            HealthScorer,
            HealthMetrics,
            HealthState
        )
        from trixy_core.satellite.failover import (
            FailoverManager,
            FailoverConfig,
            BackupRegistry
        )

        # Health Score berechnen
        scorer = HealthScorer()
        bad_metrics = HealthMetrics(
            latency_ms=600,
            packet_loss=0.15,
            error_rate=0.1,
        )
        scorer.update_metrics("sat1", bad_metrics)
        score = scorer.calculate_score("sat1")

        # Bei kritischem Zustand sollte Failover möglich sein
        if score.state in [HealthState.CRITICAL, HealthState.UNHEALTHY]:
            registry = BackupRegistry()
            manager = FailoverManager(
                backup_registry=registry,
                config=FailoverConfig(health_threshold=40.0),
            )

            # Überprüfung: Score liegt unter Threshold?
            assert score.overall < manager.config.health_threshold or score.state != HealthState.HEALTHY

    def test_zone_hierarchy_with_groups(self):
        """Test Zone-Hierarchie mit Gruppen."""
        from trixy_core.satellite.groups import (
            Zone,
            ZoneManager,
            GroupManager
        )

        # Zonen erstellen
        zones = ZoneManager()
        zones.create("haus", "Gesamtes Haus")
        zones.create("eg", "Erdgeschoss", rooms=["wohnzimmer", "küche"], parent="haus")
        zones.create("og", "Obergeschoss", rooms=["schlafzimmer"], parent="haus")

        # Gruppen für Räume
        groups = GroupManager()
        groups.create_room_group("wohnzimmer")
        groups.create_room_group("küche")

        # Satellites zuweisen
        sat1 = MockSatellite("sat1", room_id="wohnzimmer")
        sat2 = MockSatellite("sat2", room_id="küche")

        groups.auto_assign(sat1)
        groups.auto_assign(sat2)

        # Zone sollte beide Räume enthalten
        eg = zones.get("eg")
        assert "wohnzimmer" in eg
        assert "küche" in eg


if __name__ == "__main__":
    pytest.main([__file__, "-v"])