worker_processes auto;
error_log /var/logs/nginx/error.log debug;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
    use epoll;
    multi_accept on;
}

http {
    include '/etc/nginx/mime.types';
    default_type application/octet-stream;

    keepalive_timeout 65;
    keepalive_requests 100000;
    tcp_nopush on;
    tcp_nodelay on;

    proxy_buffers 16 16k;
    proxy_buffer_size 32k;
    proxy_busy_buffers_size 64k;
    proxy_max_temp_file_size 128k;


    gzip on;
    gzip_disable "msie6";
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript image/svg+xml;

    server {
        listen 80;
        server_name YOUR_DOMAIN;

        client_max_body_size 0;

        location /.well-known/acme-challenge/ {
            root /var/www/certbot;
        }

        location / {
            return 301 https://$host$request_uri;
        }
    }

    server {
        listen 443 ssl;
        server_name YOUR_DOMAIN;
        ssl_certificate /etc/letsencrypt/live/YOUR_DOMAIN/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/YOUR_DOMAIN/privkey.pem;
        root /var/www/html;

        gzip on;
        gzip_types text/css application/javascript application/json image/svg+xml;
        gzip_comp_level 9;
        etag on;

        location /sw.js {
            add_header Cache-Control "no-cache";
            proxy_cache_bypass $http_pragma;
            proxy_cache_revalidate on;
            expires off;
            access_log off;
        }


        location /oauth2 {
            expires -1;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_set_header X-Auth-Request-Redirect $request_uri;
            proxy_pass http://localhost:4180$uri$is_args$args;
        }

        location /oauth2/callback {
            proxy_pass http://localhost:4180;
            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;
        }

        location /oauth2/sign_out {
            expires -1;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_set_header X-Auth-Request-Redirect /oauth2/sign_in;
            proxy_pass http://localhost:4180;
        }


        location /pacs/ {
            auth_request /oauth2/auth;
            proxy_http_version 1.1;
            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;

            expires 0;
            add_header Cache-Control private;

            add_header 'Access-Control-Allow-Origin' '*' always;
            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
            add_header 'Access-Control-Allow-Headers' 'Authorization, Origin, X-Requested-With, Content-Type, Accept' always;

            if ($request_method = OPTIONS) {
                add_header 'Access-Control-Allow-Origin' '*';
                add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
                add_header 'Access-Control-Allow-Headers' 'Authorization, Origin, X-Requested-With, Content-Type, Accept';
                add_header 'Access-Control-Max-Age' 1728000;
                add_header 'Content-Type' 'text/plain; charset=utf-8';
                add_header 'Content-Length' 0;
                return 204;
            }

            rewrite ^/pacs/(.*) /dcm4chee-arc/aets/DCM4CHEE/rs/$1 break;
            proxy_pass http://arc:8080;
        }

        location /pacs-admin {
            return 301 /pacs-admin/;
        }

        # Redirect /pacs-admin to /dcm4chee-arc/ui2/
        location = /pacs-admin {
            return 301 $scheme://$host/dcm4chee-arc/ui2/;
        }

        # Handle /pacs-admin/ requests
        location /pacs-admin/ {
            return 301 $scheme://$host/dcm4chee-arc/ui2/;
        }

        # Proxy pass for /dcm4chee-arc/ui2/
        location /dcm4chee-arc/ui2/ {
            error_page 401 = /oauth2/sign_in?rd=$scheme://$host$request_uri;
            auth_request /oauth2/auth?allowed_groups=pacsadmin;

            auth_request_set $user $upstream_http_x_auth_request_user;
            auth_request_set $token $upstream_http_x_auth_request_access_token;
            auth_request_set $auth_cookie $upstream_http_set_cookie;

            proxy_set_header X-User $user;
            proxy_set_header X-Access-Token $token;
            add_header Set-Cookie $auth_cookie;

            proxy_http_version 1.1;
            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;

            expires 0;
            add_header Cache-Control private;

            add_header 'Access-Control-Allow-Origin' '*' always;
            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
            add_header 'Access-Control-Allow-Headers' 'Authorization, Origin, X-Requested-With, Content-Type, Accept' always;

            if ($request_method = OPTIONS) {
                add_header 'Access-Control-Allow-Origin' '*';
                add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
                add_header 'Access-Control-Allow-Headers' 'Authorization, Origin, X-Requested-With, Content-Type, Accept';
                add_header 'Access-Control-Max-Age' 1728000;
                add_header 'Content-Type' 'text/plain; charset=utf-8';
                add_header 'Content-Length' 0;
                return 204;
            }

            proxy_pass http://arc:8080;
        }

        # Proxy pass for other /dcm4chee-arc/ requests
        location /dcm4chee-arc/ {
            proxy_pass http://arc:8080;
            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;
        }


        location /pacs {
            return 301 /pacs/;
        }


        location /ohif-viewer/ {
            expires -1;
            error_page 401 = /oauth2/sign_in?rd=$scheme://$host$request_uri;
            auth_request /oauth2/auth;

            auth_request_set $user $upstream_http_x_auth_request_user;
            auth_request_set $token $upstream_http_x_auth_request_access_token;
            auth_request_set $auth_cookie $upstream_http_set_cookie;

            proxy_set_header X-User $user;
            proxy_set_header X-Access-Token $token;
            add_header Set-Cookie $auth_cookie;

            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-Server $host;
            proxy_set_header X-Forwarded-Proto $scheme;

            index index.html;
            try_files $uri $uri/ /index.html;
        }


        location /ohif-viewer {
            return 301 /ohif-viewer/;
        }

        location = / {
            return 301 /ohif-viewer/;
        }

        location / {
            add_header Cache-Control "no-store, no-cache, must-revalidate";
            add_header 'Cross-Origin-Opener-Policy' 'same-origin' always;
            add_header 'Cross-Origin-Embedder-Policy' 'require-corp' always;
        }

        location /keycloak/ {
            proxy_pass http://keycloak:8080/;
            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;
        }

        location /keycloak {
            return 301 /keycloak/;
        }
    }
}