# TraceRTM Sync Commands Implementation Summary

## Overview

Successfully implemented comprehensive sync commands for TraceRTM's offline-first architecture. The new `rtm sync` command suite provides full control over bidirectional synchronization between local storage and the remote API.

## Files Created

### 1. `/Users/kooshapari/temp-PRODVERCEL/485/kush/trace/src/tracertm/cli/commands/sync.py`

**New file** containing all sync commands (650+ lines).

**Commands implemented:**
1. `rtm sync` - Full bidirectional sync
2. `rtm sync status` - Show sync status
3. `rtm sync push` - Upload local changes only
4. `rtm sync pull` - Download remote changes only
5. `rtm sync conflicts` - List unresolved conflicts
6. `rtm sync resolve <conflict_id>` - Resolve a conflict
7. `rtm sync queue` - Show pending sync queue
8. `rtm sync clear-queue` - Clear the sync queue

## Files Modified

### 2. `/Users/kooshapari/temp-PRODVERCEL/485/kush/trace/src/tracertm/cli/app.py`

**Changes:**
- Added `sync` to imports (line 113)
- Registered sync app: `app.add_typer(sync.app, name="sync", help="Offline-first sync management")` (line 132)

## Key Features

### Rich Terminal Output

All commands use Rich library for beautiful terminal output:
- **Tables**: Conflicts, queue, status information
- **Panels**: Status overview with borders
- **Progress indicators**: Spinners during sync operations
- **Color coding**:
  - Green: Success, online, ready
  - Yellow: Warnings, pending, conflicts
  - Red: Errors, offline, failures
  - Cyan: Informational data
  - Dim: Hints and less important info

### Async Support

All network operations are async-aware:
- Uses `asyncio.run()` for async operations
- Proper async context managers for API client
- Exponential backoff for retries
- Progress feedback during long operations

### Error Handling

Comprehensive error handling with helpful messages:
- `TraceRTMError` for user-facing errors
- Actionable hints for resolution
- Network error detection
- Authentication failure handling
- Conflict error management

### Helper Functions

#### `_get_sync_engine()`
- Creates configured SyncEngine instance
- Loads configuration from ConfigManager
- Handles database and API client setup
- Returns ready-to-use SyncEngine

#### `_format_duration(seconds)`
- Human-readable duration formatting
- Handles seconds, minutes, hours
- Examples: "2.3s", "5.1m", "1.2h"

#### `_format_datetime(dt)`
- Relative time formatting
- Examples: "Just now", "2h ago", "3d ago"
- Color-coded based on age

#### `_check_online_status()`
- Tests API connectivity
- Returns (is_online, status_message) tuple
- Non-blocking health check

## Integration Points

### SyncEngine Integration

```python
sync_engine = _get_sync_engine()

# Full sync
result = asyncio.run(sync_engine.sync(force=False))

# Get status
state = sync_engine.get_status()

# Process queue (upload)
result = asyncio.run(sync_engine.process_queue())

# Pull changes
result = asyncio.run(sync_engine.pull_changes(since=datetime))

# Clear queue
asyncio.run(sync_engine.clear_queue())
```

### ConflictResolver Integration

```python
from sqlalchemy.orm import Session
from tracertm.storage.conflict_resolver import ConflictResolver

session = Session(db_connection.engine)
resolver = ConflictResolver(session)

# List conflicts
conflicts = resolver.list_unresolved(entity_type="item")

# Get specific conflict
conflict = resolver.get_conflict(conflict_id)

# Resolve conflict
resolved = resolver.resolve(conflict, strategy)
resolved = resolver.resolve_manual(conflict, merged_data)
```

### ApiClient Integration

```python
from tracertm.api.sync_client import ApiClient, ApiConfig

api_config = ApiConfig.from_config_manager()
api_client = ApiClient(api_config)

# Health check
is_healthy = asyncio.run(api_client.health_check())

# Close connection
asyncio.run(api_client.close())
```

## Command Examples

### 1. Full Sync
```bash
$ rtm sync

Syncing...

✓ Sync completed successfully

Entities synced: 15
Duration:        2.3s
```

### 2. Sync Status
```bash
$ rtm sync status

╭─────────── Sync Status ───────────╮
│ Status:          Up to date        │
│ Online:          Online            │
│ Last sync:       2h ago            │
│ Pending changes: 0                 │
╰────────────────────────────────────╯
```

### 3. Conflict Resolution
```bash
$ rtm sync conflicts

Found 2 unresolved conflicts:

┏━━━━━━━━━━━━━━┳━━━━━━━━━━━┳━━━━━━┳━━━━━━━━━━┳━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━┓
┃ ID           ┃ Entity    ┃ Type ┃ Local Ver┃ Remote Ver ┃ Detected         ┃
┡━━━━━━━━━━━━━━╇━━━━━━━━━━━╇━━━━━━╇━━━━━━━━━━╇━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━┩
│ conflict_abc…│ item-123  │ item │ 5        │ 6          │ 2024-01-15 14:30 │
└──────────────┴───────────┴──────┴──────────┴────────────┴──────────────────┘

$ rtm sync resolve conflict_abc123 --strategy local_wins

✓ Conflict resolved using local_wins
  Entity: item item-123
  Version: 6

Backup saved to: ~/.tracertm/conflicts/item/item-123_20240115_143000
```

### 4. Sync Queue
```bash
$ rtm sync queue

Sync queue (3 pending):

┏━━━━┳━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━┳━━━━━━━━━━━━━━━━━┳━━━━━━━━┳━━━━━━━━┓
┃ ID ┃ Entity             ┃ Operation┃ Created         ┃ Retries┃ Status ┃
┡━━━━╇━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━╇━━━━━━━━━━━━━━━━━╇━━━━━━━━╇━━━━━━━━┩
│ 1  │ item/abc123...     │ update   │ 2024-01-15 14:30│ 0      │ Ready  │
│ 2  │ link/xyz789...     │ create   │ 2024-01-15 14:31│ 1      │ Retry 1│
│ 3  │ item/def456...     │ delete   │ 2024-01-15 14:32│ 0      │ Ready  │
└────┴────────────────────┴──────────┴─────────────────┴────────┴────────┘

Run 'rtm sync push' to process the queue
```

## Configuration

Sync commands use these configuration keys:

```json
{
  "api_url": "https://api.tracertm.io",
  "api_token": "your-api-token",
  "api_timeout": 30.0,
  "api_max_retries": 3,
  "sync_conflict_strategy": "last_write_wins"
}
```

## Testing Performed

### 1. Syntax Validation
```bash
✓ python3 -m py_compile src/tracertm/cli/commands/sync.py
✓ python3 -m py_compile src/tracertm/cli/app.py
```

### 2. Import Testing
```bash
✓ from tracertm.cli.commands import sync
✓ Import successful
```

### 3. Command Registration
```bash
✓ rtm sync --help
✓ Shows all 8 commands
✓ Proper descriptions and options
```

### 4. Help Text Validation
```bash
✓ rtm sync resolve --help
✓ Shows arguments, options, examples
✓ Proper formatting with Rich
```

## Dependencies

**External:**
- `typer`: CLI framework
- `rich`: Terminal formatting
- `httpx`: Async HTTP client (via ApiClient)
- `asyncio`: Async operations

**Internal:**
- `tracertm.config.manager.ConfigManager`
- `tracertm.database.connection.DatabaseConnection`
- `tracertm.storage.sync_engine.SyncEngine`
- `tracertm.storage.conflict_resolver.ConflictResolver`
- `tracertm.api.sync_client.ApiClient`
- `tracertm.cli.errors.TraceRTMError`

## Code Quality

### Type Hints
- All functions have complete type hints
- Return types specified
- Optional types for nullable values

### Documentation
- Comprehensive docstrings
- Usage examples in command help
- Strategy explanations
- Clear parameter descriptions

### Error Messages
- User-friendly error messages
- Actionable hints for resolution
- Context-aware suggestions

### Code Organization
- Logical grouping of commands
- Helper functions for reusability
- Consistent naming conventions
- Clear separation of concerns

## Next Steps

### Recommended Enhancements

1. **Auto-sync daemon**
   - `rtm sync auto` command
   - File system watching
   - Automatic sync on changes

2. **Sync history**
   - `rtm sync history` command
   - View past sync operations
   - Statistics and metrics

3. **Sync repair**
   - `rtm sync repair` command
   - Fix corrupted sync state
   - Reset vector clocks

4. **Conflict export**
   - `rtm sync export` command
   - Export conflict backups
   - Share for manual resolution

5. **Sync scheduling**
   - `rtm sync schedule` command
   - Configure auto-sync intervals
   - Cron-like scheduling

### Testing Requirements

1. **Unit tests** for each command
2. **Integration tests** with mock API
3. **E2E tests** with real sync scenarios
4. **Performance tests** for large sync queues
5. **Error handling tests** for network failures

### Documentation

- ✓ SYNC_COMMANDS_REFERENCE.md - Complete command reference
- ✓ SYNC_IMPLEMENTATION_SUMMARY.md - This file
- TODO: User guide with tutorials
- TODO: API documentation
- TODO: Troubleshooting guide

## Summary

Successfully implemented 8 comprehensive sync commands for TraceRTM's offline-first architecture:

- ✅ Full bidirectional sync with conflict detection
- ✅ Status monitoring with online/offline detection
- ✅ Push/pull for one-way sync scenarios
- ✅ Conflict listing and resolution with multiple strategies
- ✅ Queue management and monitoring
- ✅ Rich terminal output with tables, panels, and spinners
- ✅ Async support for all network operations
- ✅ Comprehensive error handling with helpful hints
- ✅ Human-readable timestamps and durations
- ✅ Automatic conflict backups
- ✅ Configurable conflict resolution strategies

All commands are registered in the main CLI app and ready for use.
