# IPFS and IPWHL configuration
# Copyright (C) 2022  Nguyễn Gia Phong
#
# This file is part of loang configuration.
#
# Loang configuration is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Loang configuration is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with loang configuration.  If not, see <https://www.gnu.org/licenses/>.

{ config, ... }:
let inherit (config.networking) domain;
in {
  networking.firewall = {
    allowedTCPPorts = [ 4001 ];
    allowedUDPPorts = [ 4001 ];
  };

  security = {
    acme.certs.${domain} = {
      credentialsFile = builtins.toFile "knot.env" ''
        RFC2136_NAMESERVER=127.0.0.1
        RFC2136_TSIG_KEY=lego
        RFC2136_TSIG_ALGORITHM=hmac-sha256
        RFC2136_TSIG_SECRET_FILE=/var/lib/acme/knot.secret
      '';
      dnsProvider = "rfc2136";
      extraDomainNames = [
        "*.ipfs.${domain}"
        "*.ipns.${domain}"
      ];
      webroot = null;
    };

    sudo.extraRules = [
      {
        users = [ "xarvos" ];
        commands = [ "ALL" ];
        runAs = "ipfs";
      }
    ];
  };

  services = {
    kubo = {
      dataDir = "/mnt/nas/ipfs";
      enable = true;
      enableGC = true;
      settings.GateWay = {
        NoFetch = true;
        PublicGateways."${domain}" = {
          Paths =  [ "/ipfs" "/ipns" ];
          UseSubdomains = true;
        };
      };
    };

    nginx.virtualHosts = let
      ipfsGateway = "http://localhost:8080";
      ipfsProxy = {
        forceSSL = true;
        locations."/".proxyPass = ipfsGateway;
        useACMEHost = domain;
      };
    in {
      "${domain}".locations = {
        "/ipfs".proxyPass = ipfsGateway;
        "/ipns".proxyPass = ipfsGateway;
      };
      "*.ipfs.${domain}" = ipfsProxy;
      "*.ipns.${domain}" = ipfsProxy;
      "ipwhl.${domain}" = {
        enableACME = true;
        forceSSL = true;
        locations."/".proxyPass = ipfsGateway;
      };
    };
  };
}