{ config, pkgs, inputs, lib, ... }:
let
  domain = "peninsula.industries";
  streamingPort = 55000;
  webPort = 55001;
  postgresPort = 5433;
  path = "/var/lib/mastodon/";
  mailgunSmtpSecretName = "mailgun-smtp-password";
  mailgunSmtpPasswordPath = "/run/secrets/${mailgunSmtpSecretName}";
  mastodonDbSecretName = "mastodon-db";
  mastodonDbSecretPath = "/run/secrets/${mastodonDbSecretName}";
  uid = 2049;
  gid = 3049;
  systemUserName = "mastodon";
  systemGroupName = "mastodon";
  users = {
    users."${systemUserName}" = {
      uid = uid;
      isSystemUser = true;
      isNormalUser = false;
      group = systemGroupName;
    };
    groups."${systemGroupName}" = {
      gid = gid;
      members = [ "${systemUserName}" "nginx" ];
    };
  };
  secretSettings = {
    owner = systemUserName;
    group = systemGroupName;
  };
  publicPath = "${path}/public-system/";
  package =
    inputs.nixpkgs-nixos-unstable.legacyPackages."${pkgs.system}".mastodon;
in {
  imports = [ ../nginx.nix ];

  services.nginx = {
    virtualHosts = {
      "${domain}" = {
        forceSSL = true;
        enableACME = true;
        root = "${package}/public/";

        locations."/" = { tryFiles = "$uri @proxy"; };
        locations."/system/".alias = "${publicPath}";

        locations."@proxy" = {
          proxyPass = "http://127.0.0.1:" + toString webPort;
          proxyWebsockets = true;
        };
        locations."/api/v1/streaming/" = {
          proxyPass = "http://127.0.0.1:" + toString streamingPort;
          proxyWebsockets = true;
        };
      };
    };
  };

  sops.secrets."${mailgunSmtpSecretName}" = {
    sopsFile = ./mailgun.sops.yaml;
    path = mailgunSmtpPasswordPath;
  } // secretSettings;
  sops.secrets."${mastodonDbSecretName}" = {
    sopsFile = ./mastodon-db.sops.yaml;
    path = mastodonDbSecretPath;
  } // secretSettings;

  inherit users;

  systemd.services.mastodon-make-path = {
    script = ''
      mkdir -p ${path}
      chown -R ${systemUserName}:${systemGroupName} ${path}
      mkdir -p ${publicPath}
      chmod -R o-rwx ${publicPath}
      chmod -R g-rwx ${publicPath}
      chmod -R g+X ${publicPath}
      chmod -R g+r ${publicPath}
    '';
    serviceConfig = {
      Type = "oneshot";
      ProtectSystem = "strict";
      ReadWritePaths = path;
    };
    before = [ "container@mastodon.service" ];
  };

  containers.mastodon = {
    autoStart = true;
    forwardPorts = [
      {
        containerPort = streamingPort;
        hostPort = streamingPort;
      }
      {
        containerPort = webPort;
        hostPort = webPort;
      }
    ];
    bindMounts = {
      "${path}" = {
        hostPath = "${path}";
        isReadOnly = false;
      };
      "${mailgunSmtpPasswordPath}" = {
        hostPath = "${mailgunSmtpPasswordPath}";
        isReadOnly = true;
      };
      "${mastodonDbSecretPath}" = {
        hostPath = "${mastodonDbSecretPath}";
        isReadOnly = true;
      };
    };
    config = { config, pkgs, lib, ... }: {
      system.stateVersion = "22.05";
      services.postgresql.port = postgresPort;
      users = users // {
        mutableUsers = false;
        allowNoPasswordLogin = true;
      };
      services.mastodon = {
        enable = true;
        inherit package;
        localDomain = "${domain}";
        user = systemUserName;
        group = systemGroupName;
        smtp = {
          host = "smtp.eu.mailgun.org";
          port = 465;
          authenticate = true;
          user = "postmaster@${domain}";
          fromAddress = "Peninsula Industries Mastodon <mastodon@${domain}>";
          createLocally = false;
          passwordFile = "${mailgunSmtpPasswordPath}";
        };
        extraConfig = {
          SMTP_TLS = "true";
          SMTP_ENABLE_STARTTLS_AUTO = "true";
          SINGLE_USER_MODE = "true";
          RAILS_SERVE_STATIC_FILES = "true";
        };
        inherit streamingPort;
        inherit webPort;
        configureNginx = false;
        enableUnixSocket = false;
        database = {
          port = postgresPort;
          passwordFile = mastodonDbSecretPath;
        };
      };
    };

  };
}