# Enable Rewrite Engine
RewriteEngine On

# Redirect HTTP to HTTPS
RewriteCond %{HTTPS} !=on
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

# -----------------------
# GZIP Compression
# -----------------------
<IfModule mod_deflate.c>
    AddOutputFilterByType DEFLATE text/plain
    AddOutputFilterByType DEFLATE text/html
    AddOutputFilterByType DEFLATE text/xml
    AddOutputFilterByType DEFLATE text/css
    AddOutputFilterByType DEFLATE text/javascript
    AddOutputFilterByType DEFLATE application/javascript
    AddOutputFilterByType DEFLATE application/x-javascript
    AddOutputFilterByType DEFLATE application/json
    AddOutputFilterByType DEFLATE application/xml
    AddOutputFilterByType DEFLATE application/xhtml+xml
    AddOutputFilterByType DEFLATE application/rss+xml
    AddOutputFilterByType DEFLATE application/font-woff2
    AddOutputFilterByType DEFLATE application/font-woff
</IfModule>

# -----------------------
# Browser Caching
# -----------------------
<IfModule mod_expires.c>
    ExpiresActive On
    ExpiresDefault "access plus 1 month"

    # Images
    ExpiresByType image/jpg "access plus 1 year"
    ExpiresByType image/jpeg "access plus 1 year"
    ExpiresByType image/png "access plus 1 year"
    ExpiresByType image/gif "access plus 1 year"
    ExpiresByType image/webp "access plus 1 year"
    ExpiresByType image/svg+xml "access plus 1 year"

    # CSS & JS
    ExpiresByType text/css "access plus 1 month"
    ExpiresByType application/javascript "access plus 1 month"
    ExpiresByType text/javascript "access plus 1 month"

    # Fonts
    ExpiresByType application/font-woff2 "access plus 1 year"
    ExpiresByType application/font-woff "access plus 1 year"
</IfModule>

# -----------------------
# Keep-Alive
# -----------------------
<IfModule mod_headers.c>
    Header set Connection keep-alive
</IfModule>

# -----------------------
# Security Headers
# -----------------------
<IfModule mod_headers.c>
    # HSTS - Force HTTPS
    Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
    # XSS Protection
    Header set X-XSS-Protection "1; mode=block"
    # Clickjacking Protection
    Header set X-Frame-Options "SAMEORIGIN"
    # Content Type Sniffing Protection
    Header set X-Content-Type-Options "nosniff"
    # Referrer Policy
    Header set Referrer-Policy "strict-origin-when-cross-origin"
</IfModule>