# Nginx configuration for HabitForge

events {
    worker_connections 1024;
}

http {
    upstream backend {
        server web:8000;
    }

    # Rate limiting
    limit_req_zone $binary_remote_addr zone=api_limit:10m rate=10r/s;

    server {
        listen 80;
        server_name _;
        return 301 https://$host$request_uri;
    }

    server {
        listen 443 ssl http2;
        server_name _;

        # SSL configuration
        ssl_certificate /etc/nginx/ssl/cert.pem;
        ssl_certificate_key /etc/nginx/ssl/key.pem;
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers HIGH:!aNULL:!MD5;
        ssl_prefer_server_ciphers on;

        # Security headers
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

        # Client body size limit
        client_max_body_size 10M;

        # Static files
        location /static/ {
            alias /usr/share/nginx/html/static/;
            expires 30d;
            add_header Cache-Control "public, immutable";
        }

        # API endpoints
        location /api/ {
            limit_req zone=api_limit burst=20 nodelay;
            
            proxy_pass http://backend;
            proxy_set_header Host $host;
            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;
            
            # Timeouts
            proxy_connect_timeout 60s;
            proxy_send_timeout 60s;
            proxy_read_timeout 60s;
        }

        # Health check
        location /api/health {
            proxy_pass http://backend;
            access_log off;
        }

        # Frontend
        location / {
            root /usr/share/nginx/html;
            try_files $uri $uri/ /index.html;
        }
    }
}