{ pkgs, ... }:
let
  mailBaseConfig = {
      configName,
      address,
      userName ? address,
      host,
      displayName,
      extraMailboxes ? [],
      enableDefaultMailboxes ? true,
      neomuttExtraConfig ? "",
  } : let 
    defaultMailboxes = if enableDefaultMailboxes then
        /* `tree ~/Maildir/vbrandl/ -l -d -I "Archive|cur|new|tmp|certs|.notmuch" -afin --noreport | awk '{if(NR>1)print}' | tr '\n' ' '` */
        [ "Drafts" "Junk" "Sent" "Trash" ]
      else
        [];
    mailboxes = defaultMailboxes ++ extraMailboxes;
  in {
    address = address;
    userName = userName;
    realName = displayName;
    imap.host = host;
    smtp.host = host;
    passwordCommand = "${pkgs.libsecret}/bin/secret-tool lookup email ${address}";
    signature = {
      text = displayName;
      showSignature = "append";
    };
    aerc = {
      enable = true;
      extraAccounts = {
        pgp-opportunistic-encrypt = true;
        pgp-autosign = true;
      };
    };
    imapnotify = {
      enable = true;
      /* TODO: which boxes? */
      boxes = [ "Inbox" ];
      onNotify = "${pkgs.isync}/bin/mbsync ${configName}";
      onNotifyPost = "${pkgs.libnotify}/bin/notify-send -a mail '${configName}: new in %s'";
    };
    mbsync = {
      enable = true;
      /* sync changes to maildir in both directions */
      create = "both";
      expunge = "both";
      remove = "both";
    };
    msmtp.enable = true;
    neomutt = {
      enable = true;
      extraMailboxes = mailboxes;
      extraConfig = ''
      # use encrypted headers
      set crypt_protected_headers_write = yes
      '' + neomuttExtraConfig;
    };
    notmuch = {
      enable = true;
      neomutt.virtualMailboxes = [
        {
          name = "My INBOX";
          query = "tag:inbox";
        }
        {
          name = "Unread";
          query = "tag:unread";
        }
      ];
    };
  };
in {
  home.packages = with pkgs; [
    libsecret
    libnotify
    urlview
  ];
  home.file.mailcap = {
    target = ".mailcap";
    source = ./mailcap;
  };

  programs.password-store.enable = true;
  programs.aerc = {
    enable = false;
    extraConfig = builtins.readFile ./aerc/aerc.conf;
    /* { */
      /* general = { */
      /*   unsafe-accounts-conf = true; */
      /* }; */
    /* }; */
    extraBinds = builtins.readFile ./aerc/binds.conf;
  };
  services.mbsync.enable = true;
  programs.mbsync = {
    enable = true;
    package = pkgs.writeShellScriptBin "mbsync" ''
        ${pkgs.isync}/bin/mbsync $@
        ${pkgs.notmuch}/bin/notmuch new
      '';
  };
  services.imapnotify.enable = true;
  programs.notmuch = {
    enable = true;
  };

  programs.neomutt = {
    enable = true;
    sidebar.enable = true;
    extraConfig = builtins.readFile ./neomutt/neomuttrc;
    /* vimKeys = true; */
    macros = [
      { map = [ "pager" "index" ];
        key = "B";
        action = "|urlview\\n";
      }
      /*{ map = [ "pager" "index" ];
        key = "dd";
        action = ":set delete = yes\\n<clear-flag>N<delete-message>";
      }*/
    ];
    binds = [
      /* sidebar */
      { map = [ "attach" "browser" "index" ];
        key = "J";
        action = "sidebar-next";
      }
      { map = [ "attach" "browser" "index" ];
        key = "K";
        action = "sidebar-prev";
      }
      { map = [ "attach" "browser" "index" ];
        key = "O";
        action = "sidebar-open";
      }

      /* moving around */
      { map = [ "attach" "browser" "index" ];
        key = "j";
        action = "next-entry";
      }
      { map = [ "attach" "browser" "index" ];
        key = "k";
        action = "previous-entry";
      }
      { map = [ "attach" "browser" "index" ];
        key = "g";
        action = "noop";
      }
      { map = [ "attach" "browser" "index" ];
        key = "gg";
        action = "first-entry";
      }
      { map = [ "attach" "browser" "index" ];
        key = "G";
        action = "last-entry";
      }
      { map = [ "attach" "browser" "index" ];
        key = "n";
        action = "next-unread";
      }
      { map = [ "pager" ];
        key = "g";
        action = "noop";
      }
      { map = [ "pager" ];
        key = "gg";
        action = "top";
      }
      { map = [ "pager" ];
        key = "G";
        action = "bottom";
      }
      { map = [ "pager" ];
        key = "k";
        action = "previous-line";
      }
      { map = [ "pager" ];
        key = "j";
        action = "next-line";
      }

      /* deletion */
      { map = [ "pager" "index" ];
        key = "d";
        action = "noop";
      }
      { map = [ "pager" "index" ];
        key = "dd";
        action = "delete-message";
      }
      /* TODO: mark as new? */
      { map = [ "browser" "pager" "index" ];
        key = "U";
        action = "toggle-new";
      }
      { map = [ "browser" "pager" "index" ];
        key = "n";
        action = "search-next";
      }
      { map = [ "browser" "pager" "index" ];
        key = "N";
        action = "search-opposite";
      }

      /* threads */
      { map = [ "pager" "index" ];
        key = "dT";
        action = "delete-thread";
      }
      { map = [ "pager" "index" ];
        key = "dt";
        action = "delete-subthread";
      }
      { map = [ "pager" "index" ];
        key = "gt";
        action = "next-thread";
      }
      { map = [ "pager" "index" ];
        key = "gT";
        action = "previous-thread";
      }
      { map = [ "index" ];
        key = "za";
        action = "collapse-thread";
      }
      { map = [ "index" ];
        key = "zA";
        action = "collapse-all";
      }
    ];
  };
  programs.msmtp.enable = true;

  accounts.email.accounts = let
    aliases = "mail(\\+.*)?@vbrandl.net";
  in {
    vbrandl = (
        mailBaseConfig {
          configName = "vbrandl";
          address = "mail@vbrandl.net";
          host = "mail.vbrandl.net";
          displayName = "Valentin Brandl";
          extraMailboxes = [
            "Archive"
            "Banking"
            "Conversation"
            "Covid"
            "Dev"
            "Memberships"
            "Newsletter"
            "Orders"
            "Rent"
            "Social"
            "Support"
            "Travel"
            "Uni"
            "Work"
          ];

          /* #set use_from = yes */
          /* #set envelope_from = true */
          neomuttExtraConfig = ''
          # TODO: reply with tagged mail
          set reverse_name = yes
          alternates '${aliases}'
          '';
        }) // {
      primary = true;
      aliases = [ aliases ];
      gpg = {
        encryptByDefault = true;
        signByDefault = true;
        key = "1FFE431282F4B8CC0A7579167FB009175885FC76";
      };
    };

    riseup = (
        mailBaseConfig {
          configName = "riseup";
          address = "vbrandl@riseup.net";
          host = "mail.riseup.net";
          displayName = "Valentin Brandl";
          extraMailboxes = [
            "Archive"
            "Banking"
            "Contracts"
            "Conversation"
            "Dev"
            "Mailinglists"
            "Newsletter"
            "Orders"
            "Social"
            "Support"
            "Travel"
            "Uni"
          ];
        }) // {
      userName = "vbrandl";
      gpg = {
        encryptByDefault = true;
        signByDefault = true;
        key = "1FFE431282F4B8CC0A7579167FB009175885FC76";
      };
    };
  };
}