# TODOs before actually using this
# - change root auth to use adminpassFile
# - figure out how to enable redis caching
# - figure out how to use multiple pools (do we need this?)
# - how to enable ldap?
# - move this into a container (only reason it's not in one already is
#   to make testing easy; just run the following for a local test:
#   `nixos-container create nextcloud --config-file nextcloud.nix`
#
# Additional notes:
#  - there is a services.nextcloud.phpExtraExtensions, which may be
#    useful for this, but it's only in nixos-unstable for now
#  - there's a services.nextcloud.autoUpdateApps – do we trust nextcloud
#    enough to enable it, or will everything break if we do?

{ pkgs, ... }:
{

  environment.systemPackages = [ pkgs.htop ];

  services.nextcloud = {
    enable = true;
    
    # must be set manually; may not be incremented by more than one at
    # a time, otherwise nextcloud WILL break
    package = pkgs.nextcloud20;
    
    hostName = "10.233.2.2";
    config = {
      dbtype = "pgsql";
      dbuser = "nextcloud";
      dbhost = "/run/postgresql"; # nextcloud will add /.s.PGSQL.5432 by itself
      dbname = "nextcloud";
      # there's also a adminpassFile option, but for testing this seems
      # enough (less fiddling with getting the file into a nixos
      # container for ad-hoc setups)
      adminpass = "root";
      adminuser = "root";
    };
    
    caching.redis = true;
    
    # multiple pools may be doable using services.phpfpm.pools,
    # but i have not tried this yet. The nextcloud module defines a
    # pool "nextcloud"
    poolSettings = {
      pm = "dynamic";
      "pm.max_children" = "32";
      "pm.max_requests" = "500";
      "pm.max_spare_servers" = "4";
      "pm.min_spare_servers" = "2";
      "pm.start_servers" = "2";
    };
    
  };
  
  # TODO: this needs extra stuff in config.php, which right now can't
  # be configured using this module. Perhaps we could fork it?
  services.redis = {
    enable = true;
  };

  services.postgresql = {
    enable = true;
    ensureDatabases = [ "nextcloud" ];
    ensureUsers = [
     { # by default, postgres has unix sockets enabled, and allows a
       # system user `nextcloud` to log in without other authentication
       name = "nextcloud";
       ensurePermissions."DATABASE nextcloud" = "ALL PRIVILEGES";
     }
    ];
  };

  # ensure that postgres is running *before* running the setup
  systemd.services."nextcloud-setup" = {
    requires = ["postgresql.service"];
    after = ["postgresql.service"];
  };

  networking.firewall.allowedTCPPorts = [ 80 443 ];
}