# Phase 1 Implementation Status

## ✅ Completed Features

### Core File Operations
- [x] File handle management (`AsyncFile` class)
- [x] `open()` function matching aiofiles signature
- [x] Async context manager support (`async with`)
- [x] File operations: `read()`, `write()`, `readline()`, `readlines()`, `seek()`, `tell()`, `close()`

### Extended File Operations
- [x] `read_file_bytes()` - binary file reading
- [x] `write_file_bytes()` - binary file writing
- [x] `append_file()` - append operations

### File Position and Seeking
- [x] `seek()` with SEEK_SET/SEEK_CUR/SEEK_END support
- [x] `tell()` for current position

### Directory Operations
- [x] `create_dir()`, `create_dir_all()`
- [x] `remove_dir()`, `remove_dir_all()`
- [x] `list_dir()`, `exists()`, `is_file()`, `is_dir()`

### Directory Traversal
- [x] `walk_dir()` - recursive directory walking

### File Metadata
- [x] `stat()`, `metadata()` functions
- [x] `FileMetadata` class with size, timestamps, file/dir flags

### Path Operations
- [x] `rapfiles.ospath` module (aiofiles.ospath compatible)
- [x] Path utilities: `join()`, `abspath()`, `normpath()`, etc.

### Error Handling
- [x] `map_io_error()` helper for better error mapping
- [x] `rapfiles.exceptions` module with custom exception classes
- [x] Improved error messages with context

### aiofiles Compatibility
- [x] API matching for drop-in replacement
- [x] `rapfiles.ospath` module
- [x] Compatibility tests included

### Testing
- [x] Comprehensive test suite (6 test files, 40+ test cases)
- [x] File handle tests
- [x] Directory operation tests
- [x] Metadata tests
- [x] Extended operations tests
- [x] aiofiles compatibility tests

## 📋 Implementation Statistics

- **Rust Code**: ~850 lines in `src/lib.rs`
- **Python Bindings**: ~200 lines in `rapfiles/__init__.py`
- **Test Files**: 6 files with 40+ test cases
- **New Modules**: `ospath.py`, `exceptions.py`
- **Type Stubs**: Complete `.pyi` files for IDE support

## 🚧 Pending (Requires Build & Runtime Testing)

### Build Verification
- [ ] Compile Rust extension successfully
- [ ] Verify all imports work correctly
- [ ] Check for any compilation warnings/errors

### Test Execution
- [ ] Run all pytest tests
- [ ] Verify all tests pass
- [ ] Fix any test failures
- [ ] Add edge case coverage if needed

### Performance Validation
- [ ] Run Fake Async Detector
- [ ] Verify GIL-independent behavior
- [ ] Benchmark against aiofiles
- [ ] Validate true async performance

### Integration Testing
- [ ] Test with real-world scenarios
- [ ] Verify cross-platform compatibility (Windows, macOS, Linux)
- [ ] Test with large files
- [ ] Test concurrent operations

## 📝 Next Steps

1. **Install Rust** (if not already installed)
   ```bash
   curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
   ```

2. **Build the project**
   ```bash
   cd rapfiles
   maturin develop
   ```

3. **Run tests**
   ```bash
   pytest
   ```

4. **Verify async behavior**
   ```bash
   rap-bench detect rapfiles
   ```

5. **Test compatibility**
   ```bash
   pytest test_aiofiles_compatibility.py -v
   ```

## 📦 Files Created/Modified

### Rust Implementation
- `src/lib.rs` - Core implementation (850+ lines)

### Python Bindings
- `rapfiles/__init__.py` - Main API
- `rapfiles/_rapfiles.pyi` - Type stubs
- `rapfiles/ospath.py` - Path operations
- `rapfiles/exceptions.py` - Custom exceptions

### Tests
- `test_rapfiles.py` - Basic tests
- `test_file_handles.py` - File handle tests
- `test_directories.py` - Directory tests
- `test_metadata.py` - Metadata tests
- `test_extended_operations.py` - Extended ops tests
- `test_aiofiles_compatibility.py` - Compatibility tests

### Documentation
- `BUILD_AND_TEST.md` - Build and test instructions
- `PHASE1_STATUS.md` - This file

## 🎯 Success Criteria

Phase 1 is considered complete when:
- [x] All features implemented
- [x] Comprehensive test suite created
- [ ] All tests pass
- [ ] Fake Async Detector validation passes
- [ ] Drop-in replacement compatibility verified
- [ ] Documentation complete

## 🔗 Related Files

- `docs/ROADMAP.md` - Overall project roadmap
- `docs/BUILD_AND_TEST.md` - Build and test instructions
- `.github/workflows/publish.yml` - CI/CD configuration
