# Example: https://beb.ninja/post/email/
# Example: https://sbr.pm/configurations/mails.html
# NOTE: The passwords must exist in kwallet

# TODO: Emacs mail config

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

with lib;
with mylib.modules;

let
  cfg = config.modules.email;
in {

  options.modules.email = {
    enable = mkEnableOpt "Email";
    kmail = {
      enable = mkEnableOpt "Kmail";
      autostart = mkEnableOpt "Autostart Kmail";
    };
  };

  # TODO: Add Maildir to nextcloud sync
  config = mkIf cfg.enable {
    home.packages = with pkgs; builtins.concatLists [
      (optionals cfg.kmail.enable [ kmail ])
    ];

    home.file = mkMerge [
      (optionalAttrs cfg.kmail.autostart {
        ".config/autostart/org.kde.kmail2.desktop".source = mkIf cfg.kmail.autostart ../../config/autostart/org.kde.kmail2.desktop;
      })
    ];

    programs = {
      mbsync.enable = true; # isync package
      msmtp.enable = true;
      # Run notmuch new to index all new mail
      notmuch = {
        enable = true;
        hooks = {
          # When running notmuch new all channels will be syncronized by mbsync
          preNew = "mbsync --all";
        };
      };
    };

    # TODO: imapnotify can't parse the configuration, HM bug?
    services.imapnotify.enable = true;

    accounts.email.accounts = {
      urpost = {
        address = "tobi@urpost.de";
        userName = "tobi@urpost.de";
        realName = "Christoph Urlacher";
        signature.showSignature = "none";

        imap.host = "mail.zeus08.de";
        imap.port = 993;
        smtp.host = "mail.zeus08.de";
        smtp.port = 465;

        passwordCommand = "kwallet-query -f email -r urpost kdewallet";

        mbsync = { # Imap
          enable = true;
          create = "maildir";
        };
        msmtp.enable = true; # Smtp
        notmuch.enable = true;
        imapnotify.enable = true;
        imapnotify.onNotify =  {
          mail = "${pkgs.notmuch}/bin/notmuch new && ${pkgs.libnotify}/bin/notify-send 'New mail arrived on Urpost'";
        };

        primary = true;
      };

      hhu = {
        address = "christoph.urlacher@hhu.de";
        userName = "churl100";
        realName = "Christoph Urlacher";
        signature.showSignature = "none";

        imap.host = "mail.hhu.de";
        imap.port = 993;
        smtp.host = "mail.hhu.de";
        smtp.port = 465;

        passwordCommand = "kwallet-query -f email -r hhu kdewallet";

        mbsync = { # Imap
          enable = true;
          create = "maildir";
        };
        msmtp.enable = true; # Smtp
        notmuch.enable = true;
        imapnotify.enable = true;
        imapnotify.onNotify =  {
          mail = "${pkgs.notmuch}/bin/notmuch new && ${pkgs.libnotify}/bin/notify-send 'New mail arrived on HHU'";
        };

        primary = false;
      };

      # TODO: Setup the correct groups/patterns
      gmail = {
        address = "tobiasmustermann529@gmail.com";
        userName = "tobiasmustermann529@gmail.com";
        realName = "Christoph Urlacher";
        signature.showSignature = "none";

        flavor = "gmail.com";

        # NOTE: Uses Gmail app password
        passwordCommand = "kwallet-query -f email -r gmail kdewallet";

        mbsync = { # Imap
          enable = true;
          create = "maildir";
          patterns = ["*" "![Gmail]*" "[Gmail]/Sent Mail" "[Gmail]/Starred" "[Gmail]/All Mail"]; # Only sync inbox
        };
        msmtp.enable = true; # Smtp
        notmuch.enable = true;
        imapnotify.enable = true;
        imapnotify.onNotify =  {
          mail = "${pkgs.notmuch}/bin/notmuch new && ${pkgs.libnotify}/bin/notify-send 'New mail arrived on GMail'";
        };

        primary = false;
      };
    };
  };
}