"""Tests for session event logging (tool calls, UI events persistence)."""

import json
import asyncio
from unittest.mock import patch, MagicMock, AsyncMock

import pytest

import reachy_mini_conversation_app.stream_api as stream_api


@pytest.fixture
def mock_conversation_logger():
    """Provide a mock ConversationLogger and wire it into stream_api."""
    mock_logger = MagicMock()
    mock_logger.log_turn = MagicMock(return_value=1)
    mock_logger.get_session = MagicMock(return_value=[])

    original_logger = stream_api._conversation_logger
    original_session_id = stream_api._current_session_id
    stream_api._conversation_logger = mock_logger
    stream_api._current_session_id = "test-session-abc"

    yield mock_logger

    stream_api._conversation_logger = original_logger
    stream_api._current_session_id = original_session_id


@pytest.fixture
def mock_broadcast():
    """Mock the broadcast to avoid needing real WebSocket connections."""
    with patch.object(stream_api.manager, "broadcast", new_callable=AsyncMock) as m:
        yield m


# ─────────────────────────────────────────────────────────────
# Tool event persistence
# ─────────────────────────────────────────────────────────────


@pytest.mark.asyncio
async def test_emit_tool_start_persists_to_conversation_log(
    mock_conversation_logger, mock_broadcast
):
    """emit_tool_start should log a 'tool' turn to the conversation log."""
    await stream_api.emit_tool_start(
        name="log_entry",
        args={"type": "headache", "intensity": 7},
        event_id="evt-001",
    )

    mock_conversation_logger.log_turn.assert_called_once()
    call_kwargs = mock_conversation_logger.log_turn.call_args
    assert call_kwargs[1]["role"] == "tool"
    assert "log_entry" in call_kwargs[1]["content"]
    assert "headache" in call_kwargs[1]["content"]
    assert call_kwargs[1]["session_id"] == "test-session-abc"


@pytest.mark.asyncio
async def test_emit_tool_result_persists_to_conversation_log(
    mock_conversation_logger, mock_broadcast
):
    """emit_tool_result should log a 'tool_result' turn."""
    await stream_api.emit_tool_result(
        name="log_entry",
        result={"status": "ok", "entry_id": 42},
        event_id="evt-001",
        status="completed",
    )

    mock_conversation_logger.log_turn.assert_called_once()
    call_kwargs = mock_conversation_logger.log_turn.call_args
    assert call_kwargs[1]["role"] == "tool_result"
    assert "log_entry" in call_kwargs[1]["content"]
    assert call_kwargs[1]["metadata"]["status"] == "completed"


@pytest.mark.asyncio
async def test_emit_tool_result_truncates_large_results(
    mock_conversation_logger, mock_broadcast
):
    """Large tool results should be truncated to avoid DB bloat."""
    big_result = {"data": "x" * 2000}

    await stream_api.emit_tool_result(
        name="big_tool",
        result=big_result,
        event_id="evt-002",
    )

    call_kwargs = mock_conversation_logger.log_turn.call_args
    content = call_kwargs[1]["content"]
    assert len(content) < 1200  # truncated from 2000+
    assert "truncated" in content


# ─────────────────────────────────────────────────────────────
# UI event persistence
# ─────────────────────────────────────────────────────────────


@pytest.mark.asyncio
async def test_emit_ui_component_persists_to_conversation_log(
    mock_conversation_logger, mock_broadcast
):
    """emit_ui_component should log a 'ui' turn."""
    await stream_api.emit_ui_component(
        component_name="HeadacheLog",
        props={"intensity": 7, "location": "frontal"},
        message_id="msg-001",
    )

    mock_conversation_logger.log_turn.assert_called_once()
    call_kwargs = mock_conversation_logger.log_turn.call_args
    assert call_kwargs[1]["role"] == "ui"
    assert "HeadacheLog" in call_kwargs[1]["content"]
    assert "frontal" in call_kwargs[1]["content"]


@pytest.mark.asyncio
async def test_emit_ui_component_truncates_large_props(
    mock_conversation_logger, mock_broadcast
):
    """Large UI props should be truncated."""
    big_props = {"data": "y" * 1000}

    await stream_api.emit_ui_component(
        component_name="BigComponent",
        props=big_props,
    )

    call_kwargs = mock_conversation_logger.log_turn.call_args
    content = call_kwargs[1]["content"]
    assert len(content) < 700  # truncated from 1000+


# ─────────────────────────────────────────────────────────────
# No-op when logger is not initialized
# ─────────────────────────────────────────────────────────────


@pytest.mark.asyncio
async def test_emit_tool_start_no_crash_without_logger(mock_broadcast):
    """Should not crash when conversation logger is not initialized."""
    original = stream_api._conversation_logger
    stream_api._conversation_logger = None
    try:
        await stream_api.emit_tool_start(
            name="test_tool",
            args={"a": 1},
            event_id="evt-999",
        )
        # Should complete without error
    finally:
        stream_api._conversation_logger = original


# ─────────────────────────────────────────────────────────────
# Session-log endpoint
# ─────────────────────────────────────────────────────────────


@pytest.mark.asyncio
async def test_session_log_endpoint_returns_turns(mock_conversation_logger):
    """GET /session-log should return turns from ConversationLogger."""
    mock_conversation_logger.get_session.return_value = [
        {"turn_index": 0, "role": "user", "content": "Hello"},
        {"turn_index": 1, "role": "tool", "content": "log_entry({})"},
        {"turn_index": 2, "role": "ui", "content": "HeadacheLog: {}"},
    ]

    result = await stream_api.session_log(session_id="test-session-abc")

    assert result["session_id"] == "test-session-abc"
    assert result["turn_count"] == 3
    assert result["turns"][1]["role"] == "tool"


@pytest.mark.asyncio
async def test_session_log_endpoint_no_logger():
    """Should return error when logger not initialized."""
    original = stream_api._conversation_logger
    stream_api._conversation_logger = None
    try:
        result = await stream_api.session_log()
        assert "error" in result
    finally:
        stream_api._conversation_logger = original