{ config, lib, pkgs, ... }:

with lib;
let
  cfg = config.modules.desktop.apps.email;
  name = "Moritz Böhme";
  email = "mail@moritzboeh.me";
  mailDirectory = "/home/moritz/.mail";
in {
  options.modules.desktop.apps.email = {
    enable = mkEnableOption "email module";
    passwordFile = mkOption {
      default = null;
      type = types.path;
      description = "File containing the email password.";
    };
  };

  config = mkIf cfg.enable {
    # Protonbridge Setup
    environment.systemPackages = with pkgs; [ protonmail-bridge ];
    systemd.user.services.protonmail-bridge = {
      description = "Protonmail Bridge";
      enable = true;
      script =
        "${pkgs.protonmail-bridge}/bin/protonmail-bridge --log-level debug";
      path = [
        pkgs.gnome3.gnome-keyring
      ]; # HACK: https://github.com/ProtonMail/proton-bridge/issues/176
      wantedBy = [ "graphical-session.target" ];
      partOf = [ "graphical-session.target" ];
    };
    age.secrets.email = {
      file = cfg.passwordFile;
      owner = "1000";
    };

    # Email Applications
    home-manager.users.moritz = {
      home = { packages = with pkgs; [ thunderbird ]; };
      programs = {
        msmtp.enable = true;
        mbsync.enable = true;
      };

      services = {
        mbsync = {
          enable = true;
          frequency = "*:0/15";
          preExec = "${pkgs.isync}/bin/mbsync -Ha";
          postExec = "${pkgs.mu}/bin/mu index -m ${mailDirectory}";
        };
      };

      accounts.email = {
        maildirBasePath = mailDirectory;
        accounts = {
          default = {
            address = email;
            userName = email;
            flavor = "plain";
            primary = true;
            passwordCommand = "${pkgs.coreutils}/bin/cat /run/agenix/email";
            mbsync = {
              enable = true;
              create = "both";
              expunge = "both";
              patterns = [ "*" ];
            };
            realName = name;
            msmtp.enable = true;
            imap = {
              host = "127.0.0.1";
              port = 1143;
              tls = {
                enable = true;
                useStartTls = true;
                certificatesFile =
                  "/home/moritz/.config/protonmail/bridge/cert.pem";
              };
            };
            smtp = {
              host = "127.0.0.1";
              port = 1025;
              tls = {
                enable = true;
                useStartTls = true;
                certificatesFile =
                  "/home/moritz/.config/protonmail/bridge/cert.pem";
              };
            };
          };
        };
      };
    };
    networking.firewall.allowedTCPPorts = [ 33728 1025 1143 ];
  };
}