# Reverse Proxy Configuration for Sibedas PBG Web
# This configuration handles SSL termination and routes traffic to the appropriate containers

# Upstream for Sibedas application
upstream sibedas_backend {
    server sibedas_app:9000;
    keepalive 32;
}

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

# HTTP to HTTPS redirect
server {
    listen 80;
    server_name _;
    
    # Redirect all HTTP traffic to HTTPS
    return 301 https://$host$request_uri;
}

# HTTPS Server for Sibedas
server {
    listen 443 ssl http2;
    server_name sibedas.yourdomain.com;  # Change this to your domain
    
    # SSL Configuration
    ssl_certificate /etc/nginx/ssl/sibedas.crt;
    ssl_certificate_key /etc/nginx/ssl/sibedas.key;
    
    # SSL Security Settings
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384;
    ssl_prefer_server_ciphers off;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    
    # Security Headers
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
    add_header X-Frame-Options DENY always;
    add_header X-Content-Type-Options nosniff always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' data:; connect-src 'self'; frame-ancestors 'none';" always;
    
    # Rate limiting
    limit_req zone=sibedas_limit burst=20 nodelay;
    
    # Client max body size
    client_max_body_size 100M;
    
    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/json
        application/javascript
        application/xml+rss
        application/atom+xml
        image/svg+xml;
    
    # Root directory
    root /var/www/public;
    index index.php index.html index.htm;
    
    # Handle Laravel routes
    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }
    
    # PHP-FPM configuration
    location ~ \.php$ {
        fastcgi_pass sibedas_backend;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
        include fastcgi_params;
        
        # FastCGI optimizations
        fastcgi_buffers 16 16k;
        fastcgi_buffer_size 32k;
        fastcgi_connect_timeout 300;
        fastcgi_send_timeout 300;
        fastcgi_read_timeout 300;
    }
    
    # Static files caching
    location ~* \.(jpg|jpeg|png|gif|ico|css|js|pdf|txt)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        access_log off;
    }
    
    # Deny access to sensitive files
    location ~ /\. {
        deny all;
    }
    
    location ~ /\.ht {
        deny all;
    }
    
    # Health check endpoint
    location /health-check {
        access_log off;
        return 200 "healthy\n";
        add_header Content-Type text/plain;
    }
    
    # Logging
    access_log /var/log/nginx/sibedas_access.log;
    error_log /var/log/nginx/sibedas_error.log;
}

# Additional server blocks for other applications can be added here
# Example:
# server {
#     listen 443 ssl http2;
#     server_name other-app.yourdomain.com;
#     
#     ssl_certificate /etc/nginx/ssl/other-app.crt;
#     ssl_certificate_key /etc/nginx/ssl/other-app.key;
#     
#     location / {
#         proxy_pass http://other_app_container:port;
#         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;
#     }
# }