{ pkgs, ... }:
{
  environment.systemPackages = with pkgs; [
    lsd
    fzf
    fishPlugins.done
    fishPlugins.fzf-fish
    fishPlugins.tide
  ];

  programs.fish = {
    enable = true;
    interactiveShellInit = ''
      # disable greeting
      set fish_greeting
      # disable command-not-found
      function fish_command_not_found
        echo "Command not found"
      end


      # tmux stuff
      function tn
        set session_name (if test (count $argv) -eq 0
                basename (pwd)
            else
                echo $argv[1]
            end)

        # Check if session exists
        tmux has-session -t "$session_name" >/dev/null 2>&1
        if test $status -eq 0
            tmux attach-session -t "$session_name"
        else
            tmux new-session -s "$session_name"
        end
      end

      # tmux completion
      function __tmux_sessions
          tmux list-sessions -F '#S' 2>/dev/null
      end

      # Remove default file argument behavior
      complete -c tn -f

      # Add our custom session name completions
      complete -c tn -a '(__tmux_sessions)' -d 'tmux session'
    '';
    shellAliases = {
      ls = "lsd --icon=never";
      l = "ls -l";
      ll = "ls -la";
      vim = "nvim";
      grep = "grep --color=auto";
    };
  };
}