# -*- coding: utf-8 -*-
"""
Tests für Network RPC Correlation.
"""

import asyncio
import pytest
from datetime import datetime, timedelta

from trixy_core.network.rpc import (
    CorrelationManager,
    CorrelationConfig,
    PendingRequest,
    RequestState,
)


class TestCorrelationConfig:
    """Tests für CorrelationConfig."""

    def test_default_config(self):
        """Testet Standard-Konfiguration."""
        config = CorrelationConfig()
        assert config.default_timeout == 30.0
        assert config.cleanup_interval == 60.0
        assert config.max_pending == 10000

    def test_custom_config(self):
        """Testet benutzerdefinierte Konfiguration."""
        config = CorrelationConfig(
            default_timeout=60.0,
            max_pending=5000,
        )
        assert config.default_timeout == 60.0
        assert config.max_pending == 5000

    def test_custom_id_generator(self):
        """Testet benutzerdefinierten ID-Generator."""
        counter = [0]

        def custom_generator():
            counter[0] += 1
            return f"custom-{counter[0]}"

        config = CorrelationConfig(id_generator=custom_generator)
        assert config.id_generator is not None


class TestPendingRequest:
    """Tests für PendingRequest."""

    def test_request_creation(self):
        """Testet Request-Erstellung."""
        request = PendingRequest[str](
            correlation_id="test-123",
            timeout=30.0,
        )
        assert request.correlation_id == "test-123"
        assert request.state == RequestState.PENDING
        assert not request.is_complete

    def test_is_complete_states(self):
        """Testet is_complete für verschiedene States."""
        request = PendingRequest[str](correlation_id="test")

        request.state = RequestState.PENDING
        assert not request.is_complete

        request.state = RequestState.COMPLETED
        assert request.is_complete

        request.state = RequestState.TIMEOUT
        assert request.is_complete

        request.state = RequestState.CANCELLED
        assert request.is_complete

        request.state = RequestState.ERROR
        assert request.is_complete

    def test_elapsed(self):
        """Testet Zeitberechnung."""
        request = PendingRequest[str](
            correlation_id="test",
            created_at=datetime.now() - timedelta(seconds=5),
        )
        assert request.elapsed_seconds >= 5

    def test_is_expired(self):
        """Testet Ablaufprüfung."""
        request = PendingRequest[str](
            correlation_id="test",
            timeout=1.0,
            created_at=datetime.now() - timedelta(seconds=2),
        )
        assert request.is_expired()

        request2 = PendingRequest[str](
            correlation_id="test",
            timeout=10.0,
        )
        assert not request2.is_expired()


class TestCorrelationManager:
    """Tests für CorrelationManager."""

    @pytest.fixture
    def config(self):
        """Erstellt Test-Konfiguration."""
        return CorrelationConfig(
            default_timeout=1.0,
            max_pending=100,
        )

    @pytest.fixture
    def manager(self, config):
        """Erstellt CorrelationManager."""
        return CorrelationManager[str](config=config)

    @pytest.mark.asyncio
    async def test_create_request(self, manager):
        """Testet Request-Erstellung."""
        cid = await manager.create_request()

        assert cid is not None
        assert len(cid) > 0
        assert manager.pending_count == 1
        assert cid in manager

    @pytest.mark.asyncio
    async def test_create_request_with_metadata(self, manager):
        """Testet Request-Erstellung mit Metadaten."""
        cid = await manager.create_request(
            timeout=60.0,
            metadata={"user": "test"},
        )

        request = manager.get(cid)
        assert request.timeout == 60.0
        assert request.metadata["user"] == "test"

    @pytest.mark.asyncio
    async def test_complete_request(self, manager):
        """Testet Request-Abschluss."""
        cid = await manager.create_request()

        # Task für wait_for_response
        async def wait_task():
            return await manager.wait_for_response(cid)

        task = asyncio.create_task(wait_task())

        # Kurz warten dann abschließen
        await asyncio.sleep(0.01)
        assert manager.complete(cid, "result")

        result = await task
        assert result == "result"

    @pytest.mark.asyncio
    async def test_wait_for_response_timeout(self, manager):
        """Testet Timeout beim Warten."""
        cid = await manager.create_request(timeout=0.1)

        with pytest.raises(TimeoutError):
            await manager.wait_for_response(cid)

        request = manager.get(cid)
        assert request.state == RequestState.TIMEOUT

    @pytest.mark.asyncio
    async def test_fail_request(self, manager):
        """Testet Request-Fehler."""
        cid = await manager.create_request()

        async def wait_task():
            return await manager.wait_for_response(cid)

        task = asyncio.create_task(wait_task())

        await asyncio.sleep(0.01)
        error = ValueError("Test error")
        assert manager.fail(cid, error)

        with pytest.raises(ValueError):
            await task

    @pytest.mark.asyncio
    async def test_cancel_request(self, manager):
        """Testet Request-Abbruch."""
        cid = await manager.create_request()

        assert manager.cancel(cid)

        request = manager.get(cid)
        assert request.state == RequestState.CANCELLED

    @pytest.mark.asyncio
    async def test_complete_unknown_request(self, manager):
        """Testet Abschluss unbekannter Request."""
        assert not manager.complete("unknown-id", "result")

    @pytest.mark.asyncio
    async def test_complete_already_complete(self, manager):
        """Testet doppelten Abschluss."""
        cid = await manager.create_request()

        # Simuliere Abschluss
        request = manager.get(cid)
        request.state = RequestState.COMPLETED

        assert not manager.complete(cid, "result")

    @pytest.mark.asyncio
    async def test_remove_request(self, manager):
        """Testet Request-Entfernung."""
        cid = await manager.create_request()
        assert manager.pending_count == 1

        removed = await manager.remove(cid)
        assert removed is not None
        assert manager.pending_count == 0

    @pytest.mark.asyncio
    async def test_has_pending(self, manager):
        """Testet Pending-Prüfung."""
        cid = await manager.create_request()

        assert manager.has_pending(cid)
        assert not manager.has_pending("unknown")

    @pytest.mark.asyncio
    async def test_cleanup_expired(self, manager):
        """Testet Cleanup abgelaufener Requests."""
        # Erstelle Request mit kurzem Timeout
        cid = await manager.create_request(timeout=0.01)

        # Warte bis abgelaufen
        await asyncio.sleep(0.05)

        removed = await manager.cleanup_expired()
        assert removed == 1
        assert manager.pending_count == 0

    @pytest.mark.asyncio
    async def test_cancel_all(self, manager):
        """Testet Abbruch aller Requests."""
        await manager.create_request()
        await manager.create_request()
        await manager.create_request()

        cancelled = await manager.cancel_all()
        assert cancelled == 3

    @pytest.mark.asyncio
    async def test_get_pending_ids(self, manager):
        """Testet Abruf aller Pending-IDs."""
        cid1 = await manager.create_request()
        cid2 = await manager.create_request()

        ids = manager.get_pending_ids()
        assert cid1 in ids
        assert cid2 in ids

    @pytest.mark.asyncio
    async def test_get_stats(self, manager):
        """Testet Statistik-Abruf."""
        await manager.create_request()
        await manager.create_request()

        stats = manager.get_stats()
        assert stats["total_pending"] == 2
        assert "states" in stats

    @pytest.mark.asyncio
    async def test_max_pending_limit(self, config):
        """Testet Maximum-Limit."""
        config.max_pending = 3
        manager = CorrelationManager[str](config=config)

        await manager.create_request()
        await manager.create_request()
        await manager.create_request()

        with pytest.raises(RuntimeError):
            await manager.create_request()

    @pytest.mark.asyncio
    async def test_unique_ids(self, manager):
        """Testet ID-Eindeutigkeit."""
        ids = set()
        for _ in range(100):
            cid = await manager.create_request()
            assert cid not in ids
            ids.add(cid)

    @pytest.mark.asyncio
    async def test_custom_id_generator(self):
        """Testet benutzerdefinierten ID-Generator."""
        counter = [0]

        def generator():
            counter[0] += 1
            return f"custom-{counter[0]}"

        config = CorrelationConfig(id_generator=generator)
        manager = CorrelationManager[str](config=config)

        cid1 = await manager.create_request()
        cid2 = await manager.create_request()

        assert cid1 == "custom-1"
        assert cid2 == "custom-2"

    @pytest.mark.asyncio
    async def test_cleanup_task(self, manager):
        """Testet Cleanup-Task."""
        await manager.start_cleanup()
        assert manager._cleanup_task is not None

        await manager.stop_cleanup()
        assert manager._cleanup_task is None

    @pytest.mark.asyncio
    async def test_len_and_contains(self, manager):
        """Testet __len__ und __contains__."""
        assert len(manager) == 0

        cid = await manager.create_request()
        assert len(manager) == 1
        assert cid in manager


class TestRequestState:
    """Tests für RequestState."""

    def test_state_values(self):
        """Testet State-Werte."""
        assert RequestState.PENDING.name == "PENDING"
        assert RequestState.COMPLETED.name == "COMPLETED"
        assert RequestState.TIMEOUT.name == "TIMEOUT"
        assert RequestState.CANCELLED.name == "CANCELLED"
        assert RequestState.ERROR.name == "ERROR"