{ config, pkgs, ... }:

{
  services.zammad = {
    enable = true;
    port = 3010;
    secretKeyBaseFile = config.sops.secrets.zammad-key-base.path;
    database = {
      createLocally = true;
    };
  };
  
  services.nginx.enable = true;
  services.nginx.virtualHosts."support.cloonar.com" = {
    forceSSL = true;
    enableACME = true;
    acmeRoot = null;

    extraConfig = ''
      # Virtual endpoint created by nginx to forward auth requests.
      location /authelia {
        internal;
        set $upstream_authelia http://127.0.0.1:9091/api/verify;
        proxy_pass_request_body off;
        proxy_pass $upstream_authelia;    
        proxy_set_header Content-Length "";

        # Timeout if the real server is dead
        proxy_next_upstream error timeout invalid_header http_500 http_502 http_503;

        # [REQUIRED] Needed by Authelia to check authorizations of the resource.
        # Provide either X-Original-URL and X-Forwarded-Proto or
        # X-Forwarded-Proto, X-Forwarded-Host and X-Forwarded-Uri or both.
        # Those headers will be used by Authelia to deduce the target url of the     user.
        # Basic Proxy Config
        client_body_buffer_size 128k;
        proxy_set_header Host $host;
        proxy_set_header X-Original-URL $scheme://$http_host$request_uri;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr; 
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Forwarded-Host $http_host;
        proxy_set_header X-Forwarded-Uri $request_uri;
        proxy_set_header X-Forwarded-Ssl on;
        proxy_redirect  http://  $scheme://;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_cache_bypass $cookie_session;
        proxy_no_cache $cookie_session;
        proxy_buffers 4 32k;

        # Advanced Proxy Config
        send_timeout 5m;
        proxy_read_timeout 240;
        proxy_send_timeout 240;
        proxy_connect_timeout 240;
      }
    '';

    locations."/" = {
      proxyPass = "http://127.0.0.1:3010";
      proxyWebsockets = true;
      extraConfig =
        "proxy_connect_timeout  300;" +
        "proxy_send_timeout     300;" +
        "proxy_read_timeout     300;" +
        "send_timeout           300;"
      ;
    };
    locations."/auth/sso" = {
      proxyPass = "http://127.0.0.1:3010";
      proxyWebsockets = true;

      extraConfig = ''
        # Basic Authelia Config
        # Send a subsequent request to Authelia to verify if the user is authenticated
        # and has the right permissions to access the resource.
        auth_request /authelia;
        # Set the `target_url` variable based on the request. It will be used to build the portal
        # URL with the correct redirection parameter.
        auth_request_set $target_url $scheme://$http_host$request_uri;
        # Set the X-Forwarded-User and X-Forwarded-Groups with the headers
        # returned by Authelia for the backends which can consume them.
        # This is not safe, as the backend must make sure that they come from the
        # proxy. In the future, it's gonna be safe to just use OAuth.
        auth_request_set $user $upstream_http_remote_user;
        auth_request_set $groups $upstream_http_remote_groups;
        auth_request_set $name $upstream_http_remote_name;
        auth_request_set $email $upstream_http_remote_email;
        proxy_set_header Remote-User $user;
        proxy_set_header Remote-Groups $groups;
        proxy_set_header Remote-Name $name;
        proxy_set_header Remote-Email $email;
        # If Authelia returns 401, then nginx redirects the user to the login portal.
        # If it returns 200, then the request pass through to the backend.
        # For other type of errors, nginx will handle them as usual.
        error_page 401 =302 https://auth.cloonar.com/?rd=$target_url;
      '';
    };
    locations."/ws" = {
      proxyPass = "http://127.0.0.1:6042";
      proxyWebsockets = true;
      extraConfig =
        "proxy_read_timeout     86400;" +
        "send_timeout           300;"
      ;
    };
  };

  sops.secrets = {
    zammad-db-password = {
      sopsFile = ./secrets.yaml;
      owner = "zammad";
    };
    zammad-key-base = {
      sopsFile = ./secrets.yaml;
      owner = "zammad";
    };
  };

  services.postgresqlBackup.enable = true;
  services.postgresqlBackup.databases = [ "zammad" ];
}