# Lomda Hub (Mini-LMS)

Mini לומדות platform with locked progression, groups, Google OAuth login, achievements system, file uploads, and admin analytics.

## Features

- **Locked Progression**: Learners must complete module N before unlocking N+1
- **Google OAuth**: Sign in with Google account
- **JWT Authentication**: Access and refresh tokens for secure API access
- **Achievements System**: Earn achievements for completing courses, perfect scores, and consistent learning
- **File Uploads**: Admin can attach PDF/PPTX presentations to content modules
- **Admin Analytics**: View statistics on users, courses, enrollments, completions, and quiz attempts
- **Groups**: Restrict course access to specific user groups
- **Dark/Light Theme**: Toggle between dark and light modes

## Stack
- Frontend: React + Vite + TypeScript + React Router + MUI
- Backend: FastAPI + SQLAlchemy 2.0 + Alembic
- Database: Postgres
- Auth: JWT (access + refresh) + Google OAuth
- Dev: Docker Compose

## Quick start (Docker)

1. Create a `.env` file (see `.env.example` for reference) or set environment variables
2. `docker compose build`
3. `docker compose up -d`

Services:
- Frontend: http://localhost:5173
- Backend API: http://localhost:8000
- Backend API Docs: http://localhost:8000/docs
- Postgres: localhost:5433

Default admin credentials (seeded):
- Email: `admin@example.com`
- Password: `admin123`

## Google OAuth setup (dev)

1. Create OAuth credentials in [Google Cloud Console](https://console.cloud.google.com/).
2. Set Authorized redirect URI to `http://localhost:8000/auth/google/callback`.
3. Set the following in `.env`:
   - `GOOGLE_CLIENT_ID=your_client_id`
   - `GOOGLE_CLIENT_SECRET=your_client_secret`
   - `GOOGLE_REDIRECT_URI=http://localhost:8000/auth/google/callback`
   - `FRONTEND_URL=http://localhost:5173`

## Environment Variables

Create a `.env` file in the project root with the following variables (see `.env.example`):

```bash
# Database
DATABASE_URL=postgresql+psycopg2://postgres:postgres@db:5432/lomda

# JWT Secrets (change in production!)
JWT_SECRET_KEY=change_me_access
JWT_REFRESH_SECRET_KEY=change_me_refresh

# Frontend URL
FRONTEND_URL=http://localhost:5173

# CORS Origins (comma-separated)
CORS_ORIGINS=http://localhost:5173

# Admin Seed Credentials
ADMIN_SEED_EMAIL=admin@example.com
ADMIN_SEED_PASSWORD=admin123

# Google OAuth (optional)
GOOGLE_CLIENT_ID=
GOOGLE_CLIENT_SECRET=
GOOGLE_REDIRECT_URI=http://localhost:8000/auth/google/callback

# Upload Directory
UPLOAD_DIR=/data/uploads

# SMTP (optional, for future email features)
SMTP_HOST=
SMTP_PORT=587
SMTP_USER=
SMTP_PASSWORD=
SMTP_FROM=
```

## Local development (no Docker)

### Backend:
1. `cd backend`
2. `python -m venv .venv && .venv\Scripts\activate` (Windows) or `source .venv/bin/activate` (Linux/Mac)
3. `pip install -r requirements.txt`
4. `alembic upgrade head`
5. `python -m app.scripts.seed`
6. `uvicorn app.main:app --reload`

### Frontend:
1. `cd frontend`
2. `npm install`
3. Create `frontend/.env` with: `VITE_API_URL=http://localhost:8000`
4. `npm run dev`

## Testing Features

### Google OAuth Login
1. Ensure `GOOGLE_CLIENT_ID` and `GOOGLE_CLIENT_SECRET` are set in `.env`
2. Visit http://localhost:5173/login
3. Click "Continue with Google"
4. Complete Google sign-in flow
5. You should be redirected back to the app authenticated

### File Uploads
1. Login as admin (`admin@example.com` / `admin123`)
2. Navigate to Admin → Courses → Select a course → Modules
3. Edit a content module
4. Upload a PDF or PPTX presentation
5. Save the module
6. As a learner, enroll in the course and open that module
7. Click "View Presentation" to open the uploaded file

### Achievements
1. Login as a learner
2. Navigate to "Achievements" in the header
3. Complete courses and quizzes to earn achievements:
   - **First Course Complete**: Complete your first course
   - **Perfect Final**: Score 100% on any final exam
   - **Triple Perfect**: Score 100% on three quiz attempts in a row
   - **Fast Finisher**: Complete a course within 24 hours of enrollment
   - **Consistent Learner**: Log in on 5 different days

### Admin Analytics
1. Login as admin
2. Navigate to Admin → Analytics
3. View user and course statistics
4. Click "View Details" to see detailed information on specific users or courses

### Theme Toggle
- Click the sun/moon icon in the header to switch between light and dark themes
- Theme preference is saved in localStorage

## Database Migrations

After model changes:
1. `cd backend`
2. `alembic revision --autogenerate -m "description"`
3. `alembic upgrade head`

In Docker, migrations run automatically on container startup.

## Architecture Notes

- **Locked Progression**: On enrollment, first module is `unlocked`, rest are `locked`. Content modules mark completed when viewed. Quiz modules mark completed only if score >= pass_score.
- **Admin vs Learner**: Admins can preview courses without enrolling. Learners must enroll and follow progression rules.
- **Groups**: Courses can be restricted to specific groups. If a course has no groups, it's public (all learners can see).
- **Uploads**: Stored on disk in `UPLOAD_DIR` (/data/uploads by default). Metadata tracked in database. Only authenticated users can download.
- **Achievements**: Evaluated after module completion and quiz submission. Uses login_events table to track consistent learner achievement.

## Troubleshooting

### Google OAuth 307 Redirects
- Ensure `GOOGLE_REDIRECT_URI` matches exactly what's configured in Google Cloud Console
- Backend uses `redirect_slashes=False` to prevent automatic trailing slash redirects

### Uploads Not Working
- Ensure `UPLOAD_DIR` exists and backend has write permissions
- In Docker, uploads are stored in the `upload_data` volume

### Dark Mode Not Persisting
- Check browser localStorage for `lomda_theme` key
- Clear localStorage and try toggling theme again

## Environment
- Do not commit real secrets. Use `.env` locally and keep it in `.gitignore`.
- See `.env.example` for required values.

## License
MIT