mtgonline/backend/CONTINUATION_PROMPT.md

MTG Online Backend - Context for Continuation

Current State

I just completed fixing 10 issues with the MTG Online backend codebase. All fixes are in place but have not yet been deployed or tested.

What Was Fixed

Files Modified/Created:

1. app/routers/interactions.py - NEW - Comprehensive interaction search endpoints
2. app/main.py - REWRITTEN - Fixed router mounting and logging
3. app/routers/__init__.py - REWRITTEN - Added all router exports
4. Dockerfile - REWRITTEN - Added scripts directory and permissions

Key Changes:

• All 8 routers now properly mounted in FastAPI
• Interaction endpoints: synergies, counters, evolutions, recommendations, search, stats
• Verbose logging with debug support
• Consistent async database usage
• Redis caching for performance
• Proper error handling throughout

Next Steps - Execute These Commands

Step 1: Stop all containers

cd /home/wall-o/projects/mtgonline
docker compose down -v

Step 2: Build the backend

cd /home/wall-o/projects/mtgonline
docker compose build backend

Step 3: Deploy the stack

cd /home/wall-o/projects/mtgonline
docker compose up -d

Step 4: Wait for containers to start

# Watch logs in real-time
docker compose logs -f backend

Step 5: Verify health

# Check all containers
docker compose ps

# Test health endpoint
curl -s http://localhost:5555/health | python -m json.tool

# Check API docs are accessible
curl -s http://localhost:5555/docs | head -20

Step 6: Verify interaction endpoints

# List all registered routes
curl -s http://localhost:5555/openapi.json | python -m json.tool | grep -E '"path":|"/(interactions|cards|auth|users|decks|rooms|games|admin)"'

# Test interaction search endpoint
curl -s "http://localhost:5555/interactions/search/synergies?limit=5" | python -m json.tool

Expected Success Indicators

• All containers show healthy status
• /health returns {"status": "healthy", "version": "0.2.0"}
• /docs returns OpenAPI JSON
• All routers appear in /openapi.json
• No Python import errors in logs
• Database connections successful
• Redis connection successful

Troubleshooting

If container fails to start:

# Check exit codes
docker compose ps

# View recent logs
docker compose logs --tail=100 backend

# Check if port 5555 is in use
sudo lsof -i :5555

Common Issues:

1. Import errors: Check that all router files exist and have proper syntax
2. Database connection: Verify .env has correct database URLs
3. Port conflicts: Ensure no other service uses port 5555
4. Permission issues: Dockerfile should run as appuser not root

To view database state:

# Connect to card database
docker exec -it mtgonline_db_card psql -U mtgonline -d mtgdata -c "\dt"

# Check tables
docker exec -it mtgonline_db_card psql -U mtgonline -d mtgdata -c "SELECT count(*) FROM mtg_cards;"

Important Context

• Backend port: 5555 (not 8000!)
• Two PostgreSQL containers: mtgdata and users
• Redis for caching
• All code runs as wall-o user (UID 1001)
• Python venv at /home/wall-o/workspace/venv

Files to Review if Issues Arise

• /home/wall-o/projects/mtgonline/backend/app/main.py - Router mounting
• /home/wall-o/projects/mtgonline/backend/app/routers/interactions.py - New endpoints
• /home/wall-o/projects/mtgonline/backend/app/routers/__init__.py - Exports
• /home/wall-o/projects/mtgonline/backend/Dockerfile - Container setup
• /home/wall-o/projects/mtgonline/.env - Configuration
• /home/wall-o/projects/mtgonline/docker-compose.yml - Stack definition