# Task 10: Modernize Hub asyncio Patterns - Report

## Summary
Successfully modernized the Hub class in `aiopulse/hub.py` with all requested changes.

## Changes Made

### 1. Deprecation Warning for `loop` Parameter
- Added `import warnings` to hub.py
- Modified `Hub.__init__` to emit `DeprecationWarning` when `loop` parameter is passed
- Warning message: "loop parameter is deprecated and will be removed in v0.6.0"

### 2. Modern asyncio Patterns
- Replaced `asyncio.get_event_loop()` with `asyncio.get_running_loop()` when no loop is provided
- Changed `self.loop.create_task()` to `asyncio.create_task()` in `async_add_job()` method (2 occurrences)
- Kept `self.loop.run_in_executor()` as it has no module-level equivalent

### 3. Bounds Checking in Response Parsers
Added bounds checking to all `response_*` methods:
- `response_hubinfo`: minimum 10 bytes
- `response_roller_updated`: minimum 10 bytes
- `response_roomlist`: minimum 12 bytes
- `response_rollerlist`: minimum 12 bytes
- `response_scenelist`: minimum 12 bytes
- `response_timerlist`: minimum 12 bytes
- `response_authinfo`: minimum 15 bytes
- `response_position`: minimum 12 bytes
- `response_rollerhealth`: minimum 12 bytes
- `response_discover`: minimum 10 bytes

All raise `InvalidResponseException` with descriptive message and response context.

### 4. Fixed Duplicate Exception Catch
- Removed duplicate `except errors.InvalidResponseException` block in `run()` method (lines 707-708 in original)
- Single catch block now handles both handshake and protocol errors

### 5. Import Modernization (ruff auto-fix)
- Moved `import functools` to stdlib section
- Replaced `typing.List` with `list`
- Replaced `typing.Optional` with `X | None` syntax
- Replaced `typing.Callable` with `collections.abc.Callable`
- Added `import aiopulse` for proper type references

## Files Modified
- `aiopulse/hub.py` - Main implementation changes
- `tests/test_hub.py` - Added 15 new tests for deprecation, bounds checking, and behavior verification
- `pyproject.toml` - Added filterwarnings for deprecation warnings in tests

## Tests
- **Baseline**: 53 tests passed before changes
- **After**: 68 tests passed (15 new tests added)
- All 201 tests in full test suite pass
- New test classes:
  - `TestHubDeprecation` (2 tests)
  - `TestHubBoundsChecking` (10 tests)
  - `TestHubAsyncAddJob::test_async_add_job_uses_asyncio_create_task`
  - `TestHubRunStop::test_run_invalid_response_disconnects`
  - `TestHubRunStop::test_run_invalid_response_no_duplicate_catch`

## Commit
- SHA: `5b9650b`
- Message: "refactor: modernize hub asyncio patterns and add bounds checking"

## Concerns
- Lock context managers were not converted because the locks are used as signaling mechanisms (acquired in one method, released in a callback). Converting to context managers would change behavior.
- The `discover()` static method still passes `loop` parameter to `Hub()` constructor, which will trigger deprecation warning. This is expected as the `discover()` method also has a deprecated `loop` parameter.