{ pkgs, ... }:
{
  programs.tmux = {
    enable = true;
    package = pkgs.tmux;

    terminal = "tmux-256color";
    mouse = true;
    escapeTime = 0;

    clock24 = true;
    baseIndex= 0;

    secureSocket = true;
    aggressiveResize = true;

    historyLimit = 10000;

    prefix = "C-t";
    extraConfig = ''
      # Prevent detaching from tmux when closing a session.
      set -g detach-on-destroy off

      # Kill the current session.
      bind X kill-session

      # Splitting panes.
      unbind v
      unbind h
      unbind %
      unbind '"'
      bind v split-window -h -c "#{pane_current_path}"          # split vertically
      bind V split-window -f -h -l 72 -c "#{pane_current_path}" # split vertically, but a smaller pane
      bind h split-window -v -c "#{pane_current_path}"          # split horizontally
      bind H split-window -f -v -l 12 -c "#{pane_current_path}" # split horizontally, but a smaller pane

      # Navigating panes.
      bind ^ last-window
      bind C-h select-pane -L
      bind C-j select-pane -D
      bind C-k select-pane -U
      bind C-l select-pane -R

      # Copy mode movements.
      set-window-option -g mode-keys vi
      unbind -T copy-mode-vi Space; # Default for begin-selection
      unbind -T copy-mode-vi Enter; # Default for copy-selection
      bind -T copy-mode-vi v send-keys -X begin-selection
      bind -T copy-mode-vi y send-keys -X copy-pipe-and-cancel "xclip -in -selection clipboard"

      # Customizing status bar.
      set -g status-position bottom
      set -g status-style 'bg=#050505 fg=#C5C8C6'
      set -g status-right '#[fg=colour233,bg=colour241,bold] %m/%d #[fg=colour233,bg=colour245,bold] %H:%M '
      set -g status-right-length 50

      setw -g window-status-current-format ' #I#[fg=colour250]:#[fg=colour255]#W#[fg=colour50]#F'
      setw -g window-status-format ' #I#[fg=colour237]:#[fg=colour250]#W#[fg=colour244]#F'
    '';
  };
}