"""
Tests for conversations domain.

Tests conversation CRUD, context building, and API endpoints.
"""
import pytest
from uuid import uuid4

from src.domains.conversations.models import Conversation, Message
from src.domains.conversations.schemas import (
    CreateConversationRequest,
    AddMessageRequest,
    ConversationResponse,
    MessageResponse,
)


class TestConversationModels:
    """Tests for conversation database models."""

    def test_conversation_creation(self):
        """Test Conversation model creation with explicit values."""
        conv = Conversation(
            user_id="test-user",
            agent_type="explore",
            working_dir=".",
            total_tokens=0,
        )
        assert conv.user_id == "test-user"
        assert conv.agent_type == "explore"
        assert conv.working_dir == "."
        assert conv.total_tokens == 0

    def test_conversation_with_values(self):
        """Test Conversation with explicit values."""
        conv = Conversation(
            user_id="test-user",
            agent_type="plan",
            working_dir="/tmp/project",
            title="Test Conversation",
        )
        assert conv.agent_type == "plan"
        assert conv.working_dir == "/tmp/project"
        assert conv.title == "Test Conversation"

    def test_message_creation(self):
        """Test Message model creation with explicit values."""
        msg = Message(
            conversation_id=uuid4(),
            role="user",
            content="Hello",
            token_count=0,
            is_summary=False,
        )
        assert msg.role == "user"
        assert msg.content == "Hello"
        assert msg.token_count == 0
        assert msg.is_summary is False

    def test_message_repr(self):
        """Test Message string representation."""
        msg = Message(
            conversation_id=uuid4(),
            role="user",
            content="This is a test message",
        )
        repr_str = repr(msg)
        assert "user" in repr_str
        assert "This is a test" in repr_str


class TestConversationSchemas:
    """Tests for Pydantic schemas."""

    def test_create_request_defaults(self):
        """Test CreateConversationRequest defaults."""
        request = CreateConversationRequest()
        assert request.agent_type == "explore"
        assert request.working_dir == "."
        assert request.title is None

    def test_create_request_custom(self):
        """Test CreateConversationRequest with values."""
        request = CreateConversationRequest(
            agent_type="task",
            working_dir="/home/user/project",
            title="My Task",
        )
        assert request.agent_type == "task"
        assert request.working_dir == "/home/user/project"
        assert request.title == "My Task"

    def test_add_message_request_valid(self):
        """Test AddMessageRequest validation."""
        request = AddMessageRequest(content="Hello, world!")
        assert request.content == "Hello, world!"

    def test_add_message_request_empty_fails(self):
        """Test that empty content fails validation."""
        with pytest.raises(ValueError):
            AddMessageRequest(content="")


class TestConversationAPI:
    """Tests for conversation API endpoints."""

    @pytest.mark.anyio
    async def test_create_conversation(self, auth_client):
        """Test creating a conversation."""
        response = await auth_client.post(
            "/conversations/",
            json={"agent_type": "explore", "working_dir": "."}
        )
        assert response.status_code == 201
        data = response.json()
        assert "id" in data
        assert data["agent_type"] == "explore"
        assert data["total_tokens"] == 0

    @pytest.mark.anyio
    async def test_create_conversation_with_title(self, auth_client):
        """Test creating a conversation with title."""
        response = await auth_client.post(
            "/conversations/",
            json={
                "agent_type": "plan",
                "working_dir": "/tmp",
                "title": "Planning Session"
            }
        )
        assert response.status_code == 201
        data = response.json()
        assert data["title"] == "Planning Session"
        assert data["agent_type"] == "plan"

    @pytest.mark.anyio
    async def test_list_conversations_empty(self, auth_client):
        """Test listing conversations when empty."""
        response = await auth_client.get("/conversations/")
        assert response.status_code == 200
        data = response.json()
        assert "conversations" in data
        assert "total" in data

    @pytest.mark.anyio
    async def test_get_conversation_not_found(self, auth_client):
        """Test getting non-existent conversation."""
        fake_id = uuid4()
        response = await auth_client.get(f"/conversations/{fake_id}")
        assert response.status_code == 404

    @pytest.mark.anyio
    async def test_delete_conversation_not_found(self, auth_client):
        """Test deleting non-existent conversation."""
        fake_id = uuid4()
        response = await auth_client.delete(f"/conversations/{fake_id}")
        assert response.status_code == 404

    @pytest.mark.anyio
    async def test_add_message_not_found(self, auth_client):
        """Test adding message to non-existent conversation."""
        fake_id = uuid4()
        response = await auth_client.post(
            f"/conversations/{fake_id}/messages",
            json={"content": "Hello"}
        )
        assert response.status_code == 404


class TestConversationService:
    """Tests for ConversationService business logic."""

    @pytest.mark.anyio
    async def test_context_prompt_no_history(self):
        """Test building context prompt with no history."""
        from src.domains.conversations.service import ConversationService
        from unittest.mock import MagicMock

        # Create mock session
        mock_session = MagicMock()
        service = ConversationService(mock_session)

        prompt = service.build_context_prompt([], "What files are here?")

        assert "<current_request>" in prompt
        assert "What files are here?" in prompt
        assert "<recent_conversation>" not in prompt
        assert "<conversation_summary>" not in prompt

    @pytest.mark.anyio
    async def test_context_prompt_with_history(self):
        """Test building context prompt with message history."""
        from src.domains.conversations.service import ConversationService
        from src.domains.conversations.models import Message
        from unittest.mock import MagicMock

        mock_session = MagicMock()
        service = ConversationService(mock_session)

        messages = [
            Message(
                conversation_id=uuid4(),
                role="user",
                content="Find Python files",
            ),
            Message(
                conversation_id=uuid4(),
                role="assistant",
                content="Found 10 Python files.",
            ),
        ]

        prompt = service.build_context_prompt(messages, "Show the largest")

        assert "<recent_conversation>" in prompt
        assert "USER: Find Python files" in prompt
        assert "ASSISTANT: Found 10 Python files" in prompt
        assert "<current_request>" in prompt
        assert "Show the largest" in prompt

    @pytest.mark.anyio
    async def test_context_prompt_with_summary(self):
        """Test building context prompt with summary message."""
        from src.domains.conversations.service import ConversationService
        from src.domains.conversations.models import Message
        from unittest.mock import MagicMock

        mock_session = MagicMock()
        service = ConversationService(mock_session)

        messages = [
            Message(
                conversation_id=uuid4(),
                role="summary",
                content="Previously discussed: project setup",
                is_summary=True,
            ),
            Message(
                conversation_id=uuid4(),
                role="user",
                content="Now what?",
            ),
        ]

        prompt = service.build_context_prompt(messages, "Continue")

        assert "<conversation_summary>" in prompt
        assert "Previously discussed: project setup" in prompt


class TestSummarization:
    """Tests for conversation summarization."""

    def test_format_messages_for_summary(self):
        """Test formatting messages for summarization."""
        from src.domains.conversations.summarize import format_messages_for_summary
        from src.domains.conversations.models import Message

        messages = [
            Message(
                conversation_id=uuid4(),
                role="user",
                content="Hello",
            ),
            Message(
                conversation_id=uuid4(),
                role="assistant",
                content="Hi there!",
            ),
        ]

        formatted = format_messages_for_summary(messages)

        assert "USER: Hello" in formatted
        assert "ASSISTANT: Hi there!" in formatted

    def test_format_messages_with_summary(self):
        """Test formatting messages that include a summary."""
        from src.domains.conversations.summarize import format_messages_for_summary
        from src.domains.conversations.models import Message

        messages = [
            Message(
                conversation_id=uuid4(),
                role="summary",
                content="Previous context summary",
                is_summary=True,
            ),
            Message(
                conversation_id=uuid4(),
                role="user",
                content="Continue",
            ),
        ]

        formatted = format_messages_for_summary(messages)

        assert "[Previous Summary]" in formatted
        assert "Previous context summary" in formatted