# MarkEdit Setup Guide

This guide will help you set up and deploy MarkEdit for production or development use.

## Table of Contents

- [Prerequisites](#prerequisites)
- [GitHub OAuth Setup](#github-oauth-setup)
- [Development Setup](#development-setup)
- [Docker Deployment](#docker-deployment)
- [Production Deployment](#production-deployment)
- [Configuration Reference](#configuration-reference)
- [Troubleshooting](#troubleshooting)

## Prerequisites

### For Docker Deployment
- Docker 20.x or higher
- Docker Compose 2.x or higher
- GitHub account with OAuth app

### For Local Development
- Go 1.24 or higher
- Bun 1.x or higher (for frontend)
- Git
- GitHub account with OAuth app

## GitHub OAuth Setup

MarkEdit uses GitHub OAuth for authentication. You need to create a GitHub OAuth application:

### 1. Create OAuth Application

1. Go to [GitHub Developer Settings](https://github.com/settings/developers)
2. Click **"New OAuth App"**
3. Fill in the application details:
   - **Application name**: `MarkEdit` (or your preferred name)
   - **Homepage URL**: `http://localhost:3000` (for development)
   - **Authorization callback URL**: `http://localhost:8080/auth/github/callback`
4. Click **"Register application"**

### 2. Get Credentials

After registration, you'll see:
- **Client ID** - Copy this value
- **Client Secret** - Click "Generate a new client secret" and copy the value

> ⚠️ **Important**: Keep your Client Secret secure! Never commit it to version control.

### 3. Production URLs

For production deployment, create a separate OAuth app with production URLs:
- **Homepage URL**: `https://yourdomain.com`
- **Authorization callback URL**: `https://yourdomain.com/auth/github/callback`

## Development Setup

### 1. Clone Repository

```bash
git clone https://tangled.org/usaa.ma/markedit
cd markedit
```

### 2. Configure Environment Variables

#### Backend Configuration

Create `backend/.env`:

```bash
cd backend
cp .env.example .env
```

Edit `backend/.env`:

```bash
# GitHub OAuth
GITHUB_CLIENT_ID=your_github_oauth_client_id_here
GITHUB_CLIENT_SECRET=your_github_oauth_client_secret_here

# Session Security
SESSION_SECRET=generate-a-random-32-character-string-here

# Database
DATABASE_PATH=./data/markedit.db

# Git Cache
GIT_CACHE_DIR=./data/repos

# CORS (adjust based on your frontend URL)
CORS_ALLOWED_ORIGINS=http://localhost:4321,http://localhost:3000

# Server
PORT=8080
```

**Generate SESSION_SECRET**:
```bash
# On macOS/Linux:
openssl rand -base64 32

# Or use Go:
go run -c 'package main; import ("crypto/rand"; "encoding/base64"; "fmt"); func main() { b := make([]byte, 32); rand.Read(b); fmt.Println(base64.StdEncoding.EncodeToString(b)) }'
```

#### Frontend Configuration

Create `frontend/.env`:

```bash
cd ../frontend
echo "PUBLIC_API_URL=http://localhost:8080" > .env
```

### 3. Run Backend

```bash
cd backend

# Install dependencies
go mod download

# Create data directory
mkdir -p data

# Run server
go run cmd/server/main.go
```

Backend will start on `http://localhost:8080`

### 4. Run Frontend

In a new terminal:

```bash
cd frontend

# Install dependencies
bun install

# Start dev server
bun run dev
```

Frontend will start on `http://localhost:4321`

### 5. Access Application

1. Open browser to `http://localhost:4321`
2. Click "Sign in with GitHub"
3. Authorize the application
4. Start editing!

## Docker Deployment

Docker deployment is the recommended method for production.

### 1. Configure Environment

Create `.env` in the project root:

```bash
cp .env.example .env
```

Edit `.env`:

```bash
# GitHub OAuth (use production OAuth app)
GITHUB_CLIENT_ID=your_production_github_oauth_client_id
GITHUB_CLIENT_SECRET=your_production_github_oauth_client_secret

# Session Security
SESSION_SECRET=generate-a-secure-random-32-character-string

# Database
DATABASE_PATH=/app/data/markedit.db

# Git Cache
GIT_CACHE_DIR=/app/data/repos

# CORS (adjust for your domain)
CORS_ALLOWED_ORIGINS=https://yourdomain.com,http://localhost:3000

# Server
PORT=8080
```

### 2. Build Images

```bash
make build
```

Or manually:

```bash
docker-compose build
```

### 3. Start Services

```bash
make up
```

Or manually:

```bash
docker-compose up -d
```

### 4. Verify Deployment

Check if services are running:

```bash
make logs
```

Or:

```bash
docker-compose logs -f
```

Access the application at `http://localhost:3000`

### 5. Stop Services

```bash
make down
```

## Production Deployment

### Option 1: Docker on VPS

#### 1. Server Setup

On your VPS (Ubuntu/Debian):

```bash
# Update system
sudo apt update && sudo apt upgrade -y

# Install Docker
curl -fsSL https://get.docker.com -o get-docker.sh
sudo sh get-docker.sh

# Install Docker Compose
sudo apt install docker-compose-plugin

# Create app directory
mkdir -p ~/markedit
cd ~/markedit
```

#### 2. Deploy Application

```bash
# Clone repository
git clone https://tangled.org/usaa.ma/markedit

# Configure environment
cp .env.example .env
nano .env  # Edit with production values

# Build and start
docker-compose up -d

# Check logs
docker-compose logs -f
```

#### 3. Setup Reverse Proxy (nginx)

Install nginx:

```bash
sudo apt install nginx certbot python3-certbot-nginx
```

Create nginx config `/etc/nginx/sites-available/markedit`:

```nginx
server {
    listen 80;
    server_name yourdomain.com;

    location / {
        proxy_pass http://localhost:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}
```

Enable site and get SSL:

```bash
sudo ln -s /etc/nginx/sites-available/markedit /etc/nginx/sites-enabled/
sudo nginx -t
sudo systemctl reload nginx
sudo certbot --nginx -d yourdomain.com
```

### Option 2: Docker on Cloud Platform

#### AWS ECS / Google Cloud Run / Azure Container Instances

1. Build and push images to container registry:

```bash
# Tag images
docker tag markedit-backend:latest your-registry/markedit-backend:latest
docker tag markedit-frontend:latest your-registry/markedit-frontend:latest

# Push images
docker push your-registry/markedit-backend:latest
docker push your-registry/markedit-frontend:latest
```

2. Deploy using platform-specific tools
3. Configure environment variables in platform dashboard
4. Set up load balancer and SSL certificate

### Option 3: Manual Deployment

#### Backend

```bash
# Build binary
cd backend
go build -o markedit-server cmd/server/main.go

# Run with systemd
sudo cp markedit-server /usr/local/bin/
sudo nano /etc/systemd/system/markedit.service
```

Create systemd service:

```ini
[Unit]
Description=MarkEdit Server
After=network.target

[Service]
Type=simple
User=www-data
WorkingDirectory=/var/www/markedit
EnvironmentFile=/var/www/markedit/.env
ExecStart=/usr/local/bin/markedit-server
Restart=always

[Install]
WantedBy=multi-user.target
```

Enable and start:

```bash
sudo systemctl enable markedit
sudo systemctl start markedit
```

#### Frontend

```bash
cd frontend
bun install
bun run build

# Serve with nginx
sudo cp -r dist/* /var/www/html/
```

## Configuration Reference

### Backend Environment Variables

| Variable | Required | Default | Description |
|----------|----------|---------|-------------|
| `GITHUB_CLIENT_ID` | Yes | - | GitHub OAuth client ID |
| `GITHUB_CLIENT_SECRET` | Yes | - | GitHub OAuth client secret |
| `SESSION_SECRET` | Yes | - | 32+ character random string for session encryption |
| `DATABASE_PATH` | No | `./data/markedit.db` | Path to SQLite database file |
| `GIT_CACHE_DIR` | No | `./data/repos` | Directory for git repository cache |
| `CORS_ALLOWED_ORIGINS` | No | `http://localhost:4321` | Comma-separated allowed origins |
| `PORT` | No | `8080` | Server port |

### Frontend Environment Variables

| Variable | Required | Default | Description |
|----------|----------|---------|-------------|
| `PUBLIC_API_URL` | Yes | - | Backend API URL (e.g., `http://localhost:8080`) |

### Docker Compose Ports

| Service | Internal Port | External Port | Description |
|---------|---------------|---------------|-------------|
| Backend | 8080 | 8080 | API server |
| Frontend | 80 | 3000 | Web interface |

## Troubleshooting

### GitHub OAuth Issues

**Problem**: "OAuth callback error" or "Invalid client"

**Solution**:
1. Verify `GITHUB_CLIENT_ID` and `GITHUB_CLIENT_SECRET` are correct
2. Check callback URL in GitHub OAuth app matches your backend URL
3. Ensure callback URL format: `http://localhost:8080/auth/github/callback`

### Database Issues

**Problem**: "Unable to open database"

**Solution**:
1. Ensure data directory exists: `mkdir -p data`
2. Check file permissions: `chmod 755 data`
3. Verify `DATABASE_PATH` environment variable

### Git Operations Fail

**Problem**: "Failed to clone repository" or "Authentication failed"

**Solution**:
1. User must have granted repository access during OAuth
2. Check GitHub token has correct scopes (repo)
3. Verify `GIT_CACHE_DIR` is writable

### CORS Issues

**Problem**: "CORS policy: No 'Access-Control-Allow-Origin' header"

**Solution**:
1. Add frontend URL to `CORS_ALLOWED_ORIGINS`
2. Format: `http://localhost:4321,https://yourdomain.com`
3. Restart backend server

### Docker Build Fails

**Problem**: Build errors or dependency issues

**Solution**:
```bash
# Clean Docker cache
docker-compose down -v
docker system prune -a

# Rebuild from scratch
make build
make up
```

### Frontend Can't Connect to Backend

**Problem**: "Network error" or "Failed to fetch"

**Solution**:
1. Verify backend is running: `curl http://localhost:8080/health`
2. Check `PUBLIC_API_URL` in frontend `.env`
3. Ensure CORS is configured correctly
4. Check browser console for specific errors

### Port Already in Use

**Problem**: "Address already in use"

**Solution**:
```bash
# Find process using port
lsof -i :8080  # or :3000

# Kill process
kill -9 <PID>

# Or change port in configuration
```

## Security Best Practices

1. **Never commit secrets**: Keep `.env` files out of version control
2. **Use strong SESSION_SECRET**: Minimum 32 random characters
3. **Enable HTTPS**: Use SSL certificates in production
4. **Restrict CORS**: Only allow trusted domains
5. **Regular updates**: Keep dependencies up to date
6. **Backup database**: Regularly backup `markedit.db`
7. **Monitor logs**: Check for unauthorized access attempts

## Backup and Restore

### Backup

```bash
# Database
cp data/markedit.db backups/markedit-$(date +%Y%m%d).db

# Git cache (optional)
tar -czf backups/repos-$(date +%Y%m%d).tar.gz data/repos/
```

### Restore

```bash
# Database
cp backups/markedit-20240101.db data/markedit.db

# Restart services
docker-compose restart
```

## Support

- **Documentation**: [README.md](./README.md)
- **Issues**: [Tangled Issues](https://tangled.org/usaa.ma/markedit/issues)

## Next Steps

After setup:
1. Sign in with GitHub
2. Configure your first repository
3. Start editing markdown files
4. Create your first pull request

Happy editing! 🎉