{ config, lib, pkgs, ... }:
let
  proxy = locations: {
    inherit locations;
    forceSSL = true;
    enableACME = true;
    http2 = true;
  };
  proxyReverse = port:
    proxy {
      "/" = {
        proxyPass = "http://192.168.1.69:${toString port}";
        extraConfig = ''
          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;

          proxy_redirect http://192.168.1.69:${
            toString port
          }/ https://your_domain.com/;
        '';
      };
    };
  proxyReverseArr = port:
    proxyReverse port // {
      extraConfig = ''
        proxy_set_header   X-Forwarded-Host $host;
        proxy_set_header   Upgrade $http_upgrade;
        proxy_set_header   Connection $http_connection;
        proxy_redirect     off;
        proxy_http_version 1.1;
      '';
    };
in {
  services = {
    nginx = {
      appendHttpConfig = ''
        # JELLYFIN
        proxy_cache_path /var/cache/nginx/jellyfin-videos levels=1:2 keys_zone=jellyfin-videos:100m inactive=1d max_size=35000m;
        proxy_cache_path /var/cache/nginx/jellyfin levels=1:2 keys_zone=jellyfin:100m max_size=15g inactive=1d use_temp_path=off;
        map $request_uri $h264Level { ~(h264-level=)(.+?)& $2; }
        map $request_uri $h264Profile { ~(h264-profile=)(.+?)& $2; }
      '';
      virtualHosts = {
        "series.${config.my.domain}" = proxyReverse 8989 // { };
        "movies.${config.my.domain}" = proxyReverseArr 7878 // { };
        "indexer.${config.my.domain}" = proxyReverseArr 9696 // { };
        "music.${config.my.domain}" = proxyReverseArr 8686 // { };
        "subs.${config.my.domain}" =
          proxyReverse config.services.bazarr.listenPort // { };
        "library.${config.my.domain}" = proxyReverse config.services.kavita.port
          // { };
        "vnfx2cojmt7dwzcfmi73.${config.my.domain}" = proxyReverse 9091 // { };
        "HSoeJdGRd2Orj0n31UGI.${config.my.domain}" = proxyReverse 3399 // { };
        "flix.${config.my.domain}" = {
          forceSSL = true;
          enableACME = true;
          http2 = true;
          serverAliases = [ "flix.rotehaare.art" ];
          extraConfig = ''
            # use a variable to store the upstream proxy
            # in this example we are using a hostname which is resolved via DNS
            # (if you aren't using DNS remove the resolver line and change the variable to point to an IP address
            resolver 192.168.1.69 valid=30;

            location = / {
              return 302 http://$host/web/;
              #return 302 https://$host/web/;
            }

            location = /web/ {
              # Proxy main Jellyfin traffic
              proxy_pass http://192.168.1.69:8096/web/index.html;
              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;
              proxy_set_header X-Forwarded-Protocol $scheme;
              proxy_set_header X-Forwarded-Host $http_host;
            }
          '';
          locations = {
            "/" = {
              proxyPass = "http://192.168.1.69:8096";
              proxyWebsockets = true;
            };
            "/socket" = {
              proxyPass = "http://192.168.1.69:8096";
              extraConfig = ''
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
              '';
            };
            "~ /Items/(.*)/Images" = {
              proxyPass = "http://192.168.1.69:8096";
              extraConfig = ''
                proxy_cache jellyfin;
                proxy_cache_revalidate on;
                proxy_cache_lock on;
              '';
            };
            "~* ^/Videos/(.*)/(?!live)" = {
              proxyPass = "http://192.168.1.69:8096";
              extraConfig = ''
                # Set size of a slice (this amount will be always requested from the backend by nginx)
                # Higher value means more latency, lower more overhead
                # This size is independent of the size clients/browsers can request
                # slice 2m;

                proxy_cache jellyfin-videos;
                proxy_cache_valid 200 206 301 302 30d;
                proxy_ignore_headers Expires Cache-Control Set-Cookie X-Accel-Expires;
                proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504;
                proxy_connect_timeout 15s;
                proxy_http_version 1.1;
                proxy_set_header Connection "";
                # Transmit slice range to the backend
                proxy_set_header Range 2m;

                # This saves bandwidth between the proxy and jellyfin, as a file is only downloaded one time instead of multiple times when multiple clients want to at the same time
                # The first client will trigger the download, the other clients will have to wait until the slice is cached
                # Esp. practical during SyncPlay
                proxy_cache_lock on;
                proxy_cache_lock_age 60s;

                proxy_cache_key "jellyvideo$uri?MediaSourceId=$arg_MediaSourceId&VideoCodec=$arg_VideoCodec&AudioCodec=$arg_AudioCodec&AudioStreamIndex=$arg_AudioStreamIndex&VideoBitrate=$arg_VideoBitrate&AudioBitrate=$arg_AudioBitrate&SubtitleMethod=$arg_SubtitleMethod&TranscodingMaxAudioChannels=$arg_TranscodingMaxAudioChannels&RequireAvc=$arg_RequireAvc&SegmentContainer=$arg_SegmentContainer&MinSegments=$arg_MinSegments&BreakOnNonKeyFrames=$arg_BreakOnNonKeyFrames&h264-profile=$h264Profile&h264-level=$h264Level&slicerange=2m";

                # add_header X-Cache-Status $upstream_cache_status; # This is only for debugging cache
              '';
            };
          };
        };
      };
    };
  };
}