"""Integration tests for Chat + Adaptive + Multi-Agent features (U8).

End-to-end tests that verify the new Phase 8 capabilities work together:
- Chat mode with session management
- Adaptive pipeline execution with reflection
- Multi-Agent communication via MessageBus
"""

import asyncio
import pytest
from datetime import datetime, timezone
from unittest.mock import AsyncMock, MagicMock

from agentkit.bus.memory_bus import InMemoryMessageBus
from agentkit.bus.message import AgentMessage
from agentkit.core.orchestrator import Orchestrator, OrchestratorConfig
from agentkit.core.protocol import TaskMessage, TaskStatus
from agentkit.orchestrator.pipeline_engine import PipelineEngine
from agentkit.orchestrator.pipeline_schema import (
    AdaptiveConfig,
    Pipeline,
    PipelineStage,
    StageStatus,
)
from agentkit.session.manager import SessionManager
from agentkit.session.models import MessageRole
from agentkit.session.store import InMemorySessionStore


# ── Chat + Session Integration ────────────────────────────


class TestChatSessionIntegration:
    @pytest.mark.asyncio
    async def test_session_lifecycle_with_messages(self):
        """Full session lifecycle: create → chat → pause → resume → close."""
        store = InMemorySessionStore()
        manager = SessionManager(store=store)

        # Create session
        session = await manager.create_session(agent_name="test_agent")
        assert session is not None
        session_id = session.session_id

        # Append messages
        await manager.append_message(session_id, role=MessageRole.USER, content="Hello")
        await manager.append_message(session_id, role=MessageRole.ASSISTANT, content="Hi there!")
        await manager.append_message(session_id, role=MessageRole.USER, content="How are you?")

        # Get messages
        messages = await manager.get_messages(session_id)
        assert len(messages) == 3

        # Get chat messages (for LLM consumption)
        chat_messages = await manager.get_chat_messages(session_id)
        assert len(chat_messages) == 3
        assert chat_messages[0]["role"] == "user"

        # Pause and resume
        paused = await manager.pause_session(session_id)
        assert paused.status.value == "paused"

        resumed = await manager.resume_session(session_id)
        assert resumed.status.value == "active"

        # Close
        closed = await manager.close_session(session_id)
        assert closed.status.value == "closed"

    @pytest.mark.asyncio
    async def test_closed_session_rejects_messages(self):
        """Closed sessions should not accept new messages."""
        store = InMemorySessionStore()
        manager = SessionManager(store=store)

        session = await manager.create_session(agent_name="test_agent")
        session_id = session.session_id
        await manager.close_session(session_id)

        with pytest.raises(ValueError, match="closed"):
            await manager.append_message(session_id, role=MessageRole.USER, content="test")


# ── Adaptive Pipeline Integration ─────────────────────────


class TestAdaptivePipelineIntegration:
    @pytest.mark.asyncio
    async def test_pipeline_succeeds_without_adaptive(self):
        """Pipeline should succeed normally without adaptive config."""
        engine = PipelineEngine()  # dry-run mode
        pipeline = Pipeline(
            name="test_pipeline",
            version="1.0",
            description="Test",
            stages=[
                PipelineStage(name="step1", agent="a", action="do"),
                PipelineStage(name="step2", agent="b", action="do"),
            ],
        )

        result = await engine.execute(pipeline)
        assert result.status == StageStatus.COMPLETED

    @pytest.mark.asyncio
    async def test_pipeline_adaptive_config_default_disabled(self):
        """AdaptiveConfig default should have enabled=False."""
        config = AdaptiveConfig()
        assert config.enabled is False

    @pytest.mark.asyncio
    async def test_circular_dependency_fails_gracefully(self):
        """Pipeline with circular dependency should fail gracefully."""
        engine = PipelineEngine()
        pipeline = Pipeline(
            name="circular",
            version="1.0",
            description="Circular",
            stages=[
                PipelineStage(name="a", agent="x", action="do", depends_on=["b"]),
                PipelineStage(name="b", agent="y", action="do", depends_on=["a"]),
            ],
        )

        config = AdaptiveConfig(enabled=True, max_reflections=2)
        result = await engine.execute(pipeline, adaptive_config=config)
        assert result.status == StageStatus.FAILED


# ── Multi-Agent Communication Integration ─────────────────


class TestMultiAgentCommunication:
    @pytest.mark.asyncio
    async def test_worker_publishes_progress_to_orchestrator(self):
        """Workers should publish progress messages to orchestrator via MessageBus."""
        bus = InMemoryMessageBus()

        # Create mock agent pool
        mock_agent = AsyncMock()
        mock_result = MagicMock()
        mock_result.output_data = {"analysis": "complete"}
        mock_agent.execute = AsyncMock(return_value=mock_result)

        pool = MagicMock()
        pool.get_agent = lambda name: mock_agent
        pool.list_agents = lambda: [
            {"name": "analyst", "agent_type": "worker", "description": "Analyst"},
        ]

        orch = Orchestrator(agent_pool=pool, message_bus=bus)

        # Subscribe orchestrator to receive progress
        progress: list[AgentMessage] = []
        await bus.subscribe("orchestrator", lambda msg: progress.append(msg))

        # Execute task
        task = TaskMessage(
            task_id="t1",
            agent_name="analyst",
            task_type="analyze",
            priority=0,
            input_data={"data": "test"},
            callback_url=None,
            created_at=datetime.now(timezone.utc),
            timeout_seconds=60,
        )

        result = await orch.execute(task)
        assert result.status == TaskStatus.COMPLETED

        # Verify progress was published
        await asyncio.sleep(0.2)
        assert len(progress) >= 1
        assert progress[0].topic == "task.progress"

    @pytest.mark.asyncio
    async def test_agent_to_agent_communication(self):
        """Two agents should be able to communicate via MessageBus."""
        bus = InMemoryMessageBus()

        received_by_a: list[AgentMessage] = []
        received_by_b: list[AgentMessage] = []

        async def handler_a(msg: AgentMessage):
            received_by_a.append(msg)

        async def handler_b(msg: AgentMessage):
            received_by_b.append(msg)

        await bus.subscribe("agent_a", handler_a)
        await bus.subscribe("agent_b", handler_b)

        # Agent A sends to Agent B
        await bus.publish(AgentMessage(
            sender="agent_a",
            recipient="agent_b",
            topic="task.result",
            payload={"output": "analysis complete"},
        ))

        await asyncio.sleep(0.1)
        assert len(received_by_b) == 1
        assert received_by_b[0].payload["output"] == "analysis complete"
        assert len(received_by_a) == 0  # Not addressed to A


# ── Config Integration ────────────────────────────────────


class TestConfigIntegration:
    def test_adaptive_config_serialization(self):
        """AdaptiveConfig should be serializable."""
        from agentkit.orchestrator.pipeline_schema import AdaptiveConfig

        config = AdaptiveConfig(
            enabled=True,
            max_reflections=5,
            reflection_model="deepseek/deepseek-chat",
            skip_stages=["cleanup"],
        )
        data = config.model_dump()
        assert data["enabled"] is True
        assert data["max_reflections"] == 5
        assert "cleanup" in data["skip_stages"]

    def test_orchestrator_config_serialization(self):
        """OrchestratorConfig should be a simple dataclass."""
        config = OrchestratorConfig(
            adaptive=True,
            max_iterations=5,
            quality_threshold=0.9,
        )
        assert config.adaptive is True
        assert config.max_iterations == 5
        assert config.quality_threshold == 0.9