{ pkgs, ... }:

{
  tmux-sessions = pkgs.writeShellScriptBin "ts" ''
    # use tmux provided through module configuration/global installation
    # this is to ensure the right tmux version+configuration/plugins are loaded
    if ! which tmux >/dev/null 2>&1; then
      printf 'Unable to find tmux, make sure it is installed.'
      exit 1;
    fi

    SOURCES=(
      ~/Projects/
      /persist/etc/nixos/
    );

    if [[ $# -eq 1 ]]; then
      selected="$(${pkgs.coreutils-full}/bin/realpath "$1")";
      if [[ ! -d "''${selected}" ]]; then
        printf 'Not a directory: %s\n' "''${selected}";
        exit 1;
      fi
    else
      selected="$(
        ${pkgs.findutils}/bin/find "''${SOURCES[@]}" \
          -type d \
          -name ".git" \
          -mindepth 1 \
          -maxdepth 5 \
          -prune 2>/dev/null \
        | ${pkgs.gnused}/bin/sed 's;/\.git$;;' \
        | ${pkgs.fzf}/bin/fzf
      )";
    fi;

    if [[ -z "''${selected}" ]]; then
      exit 1;
    fi;

    selected_name="$(${pkgs.coreutils-full}/bin/basename "''${selected}" | ${pkgs.coreutils-full}/bin/tr . _)";

    if ! tmux has-session -t="''${selected_name}" 2> /dev/null; then
      tmux new-session -ds "''${selected_name}" -c "''${selected}";
    fi;

    if [[ -z ''${TMUX} ]] && [[ -z ''${tmux_running} ]]; then
      tmux -u attach -t="''${selected_name}";
      exit 0;
    fi;

    tmux switch-client -t "''${selected_name}";
    exit 0;
  '';
  mail-sync = pkgs.writeShellScriptBin "mail-sync" ''
    MBSYNC=$(${pkgs.procps}/bin/pgrep mbsync);
    NOTMUCH=$(${pkgs.procps}/bin/pgrep notmuch);
    if [ -f "''${HOME}/.config/pizauth.conf" ]; then
      mapfile -t PIZAUTH_ACCOUNTS < <(${pkgs.gnugrep}/bin/grep -i account < "''${HOME}/.config/pizauth.conf" | ${pkgs.gnused}/bin/sed -E 's/^[^"]*"([^"]*).*$/\1/');
    else
      PIZAUTH_ACCOUNTS=();
    fi

    if ! which mbsync; then
      printf 'Program mbsync not in path. Aborting!\n';
      exit 1;
    fi

    # Load Pizauth if it isn't running
    if [ ''${#PIZAUTH_ACCOUNTS[@]} -gt 0 ] && [ -z "$(${pkgs.sysvtools}/bin/pidof pizauth)" ]; then
      ${pkgs.pizauth}/bin/pizauth server;
      ${pkgs.libsecret}/bin/secret-tool lookup pizauth keys | ${pkgs.gnupg}/bin/gpg -ad | ${pkgs.pizauth}/bin/pizauth restore;
      sleep 5;
    fi

    if [ -n "$MBSYNC" ] || [ -n "$NOTMUCH" ]; then
        echo "Already running one instance of mbsync or notmuch. Exiting...";
        exit 1;
    fi;

    printf 'Deleting messages tagged as *deleted*\n'
    ${pkgs.notmuch}/bin/notmuch search --format=text0 --output=files tag:deleted | ${pkgs.findutils}/bin/xargs -0 --no-run-if-empty rm -v;

    if ! mbsync -a; then
      for account in "''${PIZAUTH_ACCOUNTS[@]}"; do
        printf 'Refreshing pizauth account "%s".\n' "''${account}";
        ${pkgs.pizauth}/bin/pizauth refresh "''${account}";
      done;
      exit 1;
    fi;

    ${pkgs.notmuch}/bin/notmuch new;
    exit $?;
  '';
}