go

Design.md

@@ -11,11 +11,11 @@
 4. Download missing activities (`garminsync download --missing`)
 
 ## Tech Stack
-**Frontend:** Python CLI (argparse)
-**Backend:** Python 3.10+ with garminexport==1.2.0
+**Frontend:** CLI (Go)
+**Backend:** Go
 **Database:** SQLite (garmin.db)
 **Hosting:** Docker container
-**Key Libraries:** garminexport, python-dotenv, sqlite3
+**Key Libraries:** garminexport (Go), viper (env vars), cobra (CLI framework), go-sqlite3
 
 ## Data Structure
 **Main data object:**
@@ -28,7 +28,7 @@ Activity:
 ```
 
 ## User Flow
-1. User launches container with credentials: `docker run -it --env-file .env garminsync`
+1. User launches container with credentials: `sudo docker run -it --env-file .env garminsync`
 2. User is presented with CLI menu of options
 3. User selects command (e.g., `garminsync download --missing`)
 4. Application executes task with progress indicators
@@ -36,50 +36,81 @@ Activity:
 
 ## File Structure
 ```
-GarminSync/
+/garminsync
+├── cmd/
+│   └── root.go (CLI entrypoint)
+│   └── list.go (activity listing commands)
+│   └── download.go (download command)
+├── internal/
+│   ├── garmin/
+│   │   ├── client.go (API integration)
+│   │   └── activity.go (activity models)
+│   └── db/
+│       ├── database.go (embedded schema)
+│       ├── sync.go (NEW: database synchronization)
+│       └── migrations.go (versioned migrations)
 ├── Dockerfile
-├── .env.example
-├── requirements.txt
-└── main.py
+├── .env
+└── README.md
 ```
 
 ## Technical Implementation Notes
-- **Single-file architecture:** All logic in main.py (CLI, DB, Garmin integration)
+- **Architecture:** Go-based implementation with Cobra CLI framework
 - **Authentication:** Credentials via GARMIN_EMAIL/GARMIN_PASSWORD env vars (never stored)
 - **File naming:** `activity_{id}_{timestamp}.fit` (e.g., activity_123456_20240807.fit)
 - **Rate limiting:** 2-second delays between API requests
-- **Database:** In-memory during auth testing, persistent garmin.db for production
-- **Docker** All docker commands require the use of sudo
+- **Database:** Embedded schema creation in Go code with versioned migrations
+- **Docker:** 
+    - All commands require sudo as specified
+    - Fully containerized build process (no host Go dependencies)
+- **Session management:** Automatic cookie handling via garminexport with file-based persistence
+- **Pagination:** Implemented for activity listing
+- **Package stability:** Always use stable, released versions of packages to ensure reproducibility
 
 ## Development Phases
-### Phase 1: Core Infrastructure
-- [X] Dockerfile with Python 3.10 base
-- [X] Environment variable handling
-- [X] garminexport client initialization
+### Phase 1: Core Infrastructure - COMPLETE
+- [x] Dockerfile creation
+- [x] Environment variable handling (viper)
+- [x] Cobra CLI framework setup
+- [x] garminexport client initialization (with session persistence)
 
-### Phase 2: Activity Listing
-- [ ] SQLite schema implementation
-- [ ] Activity listing commands
-- [ ] Database synchronization
+### Phase 2: Activity Listing - COMPLETE
+- [x] SQLite schema implementation
+- [x] Activity listing commands
+- [x] Database synchronization
+- [x] List command UI implementation
 
-### Phase 3: Download Pipeline
-- [ ] FIT file download implementation
-- [ ] Idempotent download logic
-- [ ] Database update on success
+### Phase 3: Download Pipeline - COMPLETE
+- [x] FIT file download implementation
+- [x] Idempotent download logic (with exponential backoff)
+- [x] Database update on success
+- [x] Database sync integration
 
 ### Phase 4: Polish
-- [ ] Progress indicators
-- [ ] Error handling
+- [x] Progress indicators (download command)
+- [ ] Error handling (robust error recovery)
 - [ ] README documentation
+- [x] Session timeout handling
 
 ## Critical Roadblocks
-1. **Garmin API changes:** garminexport is abandoned, switch to garmin-connect-export instead
-2. **Rate limiting:** Built-in 2-second request delays
-3. **Session management:** Automatic cookie handling via garminexport
-4. **File conflicts:** Atomic database updates during downloads
-5. **Docker permissions:** Volume-mounted /data directory for downloads
+1. **Rate limiting:** Built-in 2-second request delays (implemented)
+2. **Session management:** Automatic cookie handling via garminexport (implemented)
+3. **File conflicts:** Atomic database updates during downloads (implemented)
+4. **Docker permissions:** Volume-mounted /data directory for downloads (implemented)
+5. ~~**Database sync:** Efficient Garmin API ↔ local sync~~ (implemented)
 
 ## Current Status
-**Working on:** Phase 1 - Core Infrastructure (Docker setup, env vars)
-**Next steps:** Implement activity listing with SQLite schema
-**Known issues:** Garmin API rate limits (mitigated by 2s delays), session timeout handling
+**Working on:** Phase 4 - Final polish and error handling  
+**Next steps:**  
+1. Fix command flag parsing issue  
+2. Implement comprehensive error handling  
+3. Complete README documentation  
+4. Final testing and validation  
+
+**Known issues:** 
+- Command flag parsing issue: The `--all` flag is not being recognized by the CLI. This appears to be related to how Cobra handles flags for subcommands. The root cause is being investigated.
+
+## Recent Fixes
+- Fixed package declaration conflicts in cmd/ directory (changed from `package cmd` to `package main`)
+- Removed unnecessary import in root.go that was causing build errors
+- Verified Docker build process now completes successfully