# ============================================================================
# Full nginx.conf for Nextcloud running in Docker BEHIND an external
# SSL-terminating reverse proxy ().
#
# - This Nginx instance listens on HTTP/80.
# - It serves Nextcloud directly using PHP-FPM from the 'nextcloud:9000' container.
# - It trusts headers forwarded by the external proxy.
# - NO SSL configuration is needed here.
# ============================================================================

user www-data;
# Use 'auto' or set to the number of CPU cores available to the container
worker_processes auto;

# Standard error log and PID file paths within the container
error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    # Adjust worker_connections based on expected load
    worker_connections 1024;
}

http {
    # Include standard MIME types
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    # Custom MIME types - Enhanced for MJS support
    types {
        image/x-raw           raw;
        image/x-sony-arw      arw;
        application/javascript mjs;  # Ensure MJS has proper MIME type
    }

    # Double-check the MIME type mapping by adding it globally
    map $uri $javascript_module {
        ~\.mjs$ "application/javascript";
        default "";
    }

    # ==================================================
    # Proxy Handling & Real IP Configuration
    # ==================================================
    # Define the IP of the trusted external reverse proxy
    set_real_ip_from 192.168.0.215;
    # Specify the header containing the client's real IP
    real_ip_header X-Forwarded-For;
    # Use 'on' if the proxy might add multiple IPs (e.g., X-Forwarded-For: client, proxy1)
    # real_ip_recursive on;

    # ==================================================
    # Logging Configuration
    # ==================================================
    # Log format including the forwarded-for header.
    # If realip module works, $remote_addr will show the real client IP.
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';
    access_log /var/log/nginx/access.log main;

    # ==================================================
    # Performance & Security Defaults
    # ==================================================
    server_tokens off; # Hide nginx version
    sendfile on;       # Use efficient file transfer
    tcp_nopush on;     # Optimize packet sending
    tcp_nodelay on;    # Reduce latency for keep-alive
    keepalive_timeout 65; # Keep connections open longer

    # Helper map for cache control (retained from original)
    map $arg_v $asset_immutable {
        ""        "";
        default   ", immutable";
    }

    # ==================================================
    # Upstream PHP-FPM Definition
    # ==================================================
    # Define the Nextcloud application container running PHP-FPM
    upstream php-handler {
        # Use the Docker service name and port
        server nextcloud:9000;
    }

    # ==================================================
    # Main Server Block (Listens on HTTP/80)
    # ==================================================
    server {
        # Listen on port 80 within the container network
        listen 80;
        # listen [::]:80; # Uncomment if using IPv6 internally

        # Optional: Set server name (domain used publicly)
        # server_name cloud.example.com; # <<< Your public Nextcloud domain

        # --- Basic Settings ---
        # Set maximum allowed size for uploaded files
        client_max_body_size 512M; # Adjust as needed
        # Set timeout for reading client request body
        client_body_timeout 300s;
        # FastCGI buffer settings for PHP communication
        fastcgi_buffers 64 4K;
        client_body_buffer_size 512k; # Buffer for client request body

        # --- Gzip Compression ---
        gzip on;
        gzip_vary on;
        gzip_comp_level 4; # Balance between CPU and compression ratio
        gzip_min_length 256; # Don't compress very small files
        gzip_proxied expired no-cache no-store private no_last_modified no_etag auth; # Compress even for proxied requests
        # Define types of files to compress
        gzip_types
            application/atom+xml application/javascript application/json application/ld+json
            application/manifest+json application/rss+xml application/vnd.geo+json
            application/vnd.ms-fontobject application/wasm application/x-font-ttf
            application/x-web-app-manifest+json application/xhtml+xml application/xml
            font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest
            text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt
            text/x-component text/x-cross-domain-policy;

        # --- Security Headers ---
        # These add defense-in-depth. HSTS should be set on the external proxy (192.168.0.215).
        # add_header Strict-Transport-Security "max-age=..." always; # DO NOT set HSTS here
        add_header Referrer-Policy                      "no-referrer"       always;
        add_header X-Content-Type-Options               "nosniff"           always;
        add_header X-Frame-Options                      "SAMEORIGIN"        always;
        add_header X-Permitted-Cross-Domain-Policies    "none"              always;
        add_header X-Robots-Tag                         "noindex, nofollow" always;
        add_header X-XSS-Protection                     "1; mode=block"     always;
        # Content Security Policy (retained from original - review if suitable)
        add_header Content-Security-Policy "frame-ancestors 'self'; connect-src 'self' blob: stun.nextcloud.com:443 wss://gabenszip.com https://gabenszip.com http://gabenszip.com ws://gabenszip.com gabenszip.com:* 'unsafe-eval' 'unsafe-inline'" always;

        # Hide PHP's "X-Powered-By" header
        fastcgi_hide_header X-Powered-By;

        # --- Document Root ---
        # IMPORTANT: Adjust this path if your Nextcloud files are mounted elsewhere in this container
        root /var/www/html;
        # Define default index files
        index index.php index.html /index.php$request_uri;

        # --- Location Blocks ---

        # Deny access to sensitive files/directories
        location ~ ^/(?:build|tests|config|lib|3rdparty|templates|data)(?:$|/)  { return 404; }
        location ~ ^/(?:\.|autotest|occ|issue|indie|db_|console)                { return 404; }

        # Handle /.well-known requests for service discovery (CalDAV, CardDAV, etc.)
        location ^~ /.well-known {
            location = /.well-known/carddav { return 301 /remote.php/dav/; }
            location = /.well-known/caldav  { return 301 /remote.php/dav/; }
            # ACME challenges usually handled by external proxy, otherwise allow here if needed
            location ~ ^/\.well-known/(acme-challenge|pki-validation)/ { allow all; }
            # Let Nextcloud handle other .well-known requests via PHP
            return 301 /index.php$request_uri;
        }

        # Special handling for Microsoft DAV clients hitting the root
        location = / {
            if ($http_user_agent ~ ^DavClnt) {
                return 302 /remote.php/webdav/$is_args$args;
            }
            # If not DAV, fallback to PHP front controller
            try_files $uri $uri/ /index.php$request_uri;
        }

        # Robots.txt - allow access
        location = /robots.txt {
            allow all;
            log_not_found off;
            access_log off;
        }

        # Enhanced handling for JavaScript module files (.mjs)
        location ~* \.mjs$ {
            # Multiple methods to ensure correct Content-Type header
            types { application/javascript mjs; }
            
            # Force the correct MIME type
            default_type application/javascript;
            
            # Explicitly set Content-Type header
            add_header Content-Type application/javascript always;
            
            # Override any default Content-Type
            if ($javascript_module) {
                add_header Content-Type $javascript_module always;
            }
            
            # Try serving file directly, else pass to PHP
            try_files $uri /index.php$request_uri;
            
            # Caching headers
            add_header Cache-Control "public, max-age=15778463$asset_immutable";
            
            # Add security headers
            add_header Referrer-Policy                   "no-referrer"       always;
            add_header X-Content-Type-Options            "nosniff"           always;
            add_header X-Frame-Options                   "SAMEORIGIN"        always;
            add_header X-Permitted-Cross-Domain-Policies "none"              always;
            add_header X-Robots-Tag                      "noindex, nofollow" always;
            add_header X-XSS-Protection                  "1; mode=block"     always;
            add_header Content-Security-Policy "frame-ancestors 'self'; connect-src 'self' blob: stun.nextcloud.com:443 wss://gabenszip.com https://gabenszip.com http://gabenszip.com ws://gabenszip.com gabenszip.com:* 'unsafe-eval' 'unsafe-inline'" always;
            
            # Disable access logging for static files
            access_log off;
        }

        # Main PHP processing block
        location ~ \.php(?:$|/) {
            # Security rewrite: Prevent direct access to PHP files except known endpoints
            rewrite ^/(?!index|remote|public|cron|core\/ajax\/update|status|ocs\/v[12]|updater\/.+|ocs-provider\/.+|.+\/richdocumentscode(_arm64)?\/proxy) /index.php$request_uri;

            # Split path info for PHP (e.g., /index.php/foo/bar)
            fastcgi_split_path_info ^(.+?\.php)(/.*)$;
            set $path_info $fastcgi_path_info;

            # Try the script itself, otherwise return 404
            try_files $fastcgi_script_name =404;

            # Include standard FastCGI parameters
            include fastcgi_params;

            # --- Crucial FastCGI Parameters ---
            # Set script filename and path info
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            fastcgi_param PATH_INFO $path_info;
            
            # HTTPS handling
            fastcgi_param HTTPS off;  # Let Nextcloud config handle the protocol

            # Force protocol settings to use HTTP (not HTTPS)
            fastcgi_param HTTP_X_FORWARDED_PROTO http;
            fastcgi_param REQUEST_SCHEME http;
            
            # Pass the client's real IP address to PHP
            fastcgi_param REMOTE_ADDR $remote_addr;
            
            # Pass other useful headers from the proxy (ensure proxy sets them!)
            fastcgi_param HTTP_X_FORWARDED_FOR $http_x_forwarded_for;
            
            # Pass host header
            fastcgi_param HTTP_HOST $http_host;

            # Parameters for Nextcloud pretty URLs and header management
            fastcgi_param modHeadersAvailable true;
            fastcgi_param front_controller_active true;

            # Send request to the PHP-FPM upstream handler defined earlier
            fastcgi_pass php-handler;

            # --- Performance & Error Handling ---
            fastcgi_intercept_errors on; # Let Nginx handle PHP errors (e.g., show custom 50x page)
            fastcgi_request_buffering off; # Disable buffering for long-running scripts/uploads
            fastcgi_max_temp_file_size 0; # Prevent writing large uploads to temp files
        }

        # Serve static files (CSS, JS, images, including custom types)
        location ~* \.(?:css|js|svg|gif|ico|jpe?g|png|webp|wasm|tflite|map|ogg|flac|arw|raw)$ {
            # Try to serve file directly, else pass to PHP (e.g., for theming)
            try_files $uri /index.php$request_uri;
            # Caching headers
            add_header Cache-Control "public, max-age=15778463$asset_immutable";
            # Add security headers (can potentially be inherited)
            add_header Referrer-Policy                   "no-referrer"       always;
            add_header X-Content-Type-Options            "nosniff"           always;
            add_header X-Frame-Options                   "SAMEORIGIN"        always;
            add_header X-Permitted-Cross-Domain-Policies "none"              always;
            add_header X-Robots-Tag                      "noindex, nofollow" always;
            add_header X-XSS-Protection                  "1; mode=block"     always;
            # Disable access logging for static files
            access_log off;

            # Specific MIME type for WebAssembly if needed explicitly
            location ~ \.wasm$ {
                default_type application/wasm;
            }
        }

        # Serve font files with longer expiry
        location ~ \.(?:woff2?|ttf|eot)$ {
            # Try to serve file directly, else pass to PHP
            try_files $uri /index.php$request_uri;
            # Caching headers (fonts rarely change)
            add_header Cache-Control "public, max-age=15778463$asset_immutable";
            expires 7d; # Alternative cache control
             # Add security headers (can potentially be inherited)
            add_header Referrer-Policy                   "no-referrer"       always;
            add_header X-Content-Type-Options            "nosniff"           always;
            # Disable access logging for static files
            access_log off;
        }

        # Redirect for /remote endpoint used by some clients
        location /remote {
            return 301 /remote.php$request_uri;
        }

        # Fallback location - pass everything else to the PHP front controller
        location / {
            try_files $uri $uri/ /index.php$request_uri;
        }

    } # End server block (port 80)
} # End http block