{ lib, config, pkgs, ... }:
with lib;
let
  cfg = config.modules.cli.tmux;
in
{
  options.modules.cli.tmux = {
    enable = mkEnableOption "enable Tmux";
    extraConfig = mkOption {
      type = types.lines;
      default = '''';
      description = ''
        user related Tmux options, wee be concatenated with options defined
        in the module.
      '';
    };
  };
  config = mkIf cfg.enable {
    home.file.".local/bin/create-tmux-session".source = ./files/create-tmux-session.sh;
    programs.tmux = {
      enable = true;
      aggressiveResize = true;
      baseIndex = 1;
      customPaneNavigationAndResize = false;
      escapeTime = 0;
      focusEvents = true;
      keyMode = "vi";
      mouse = true;
      prefix = "C-a";
      terminal = "tmux-256color";
      extraConfig = ''
        set -g detach-on-destroy off
        set -g display-time 1500

        bind -n -N "Select pane to the left of the active pane" M-h select-pane -L
        bind -n -N "Select pane below the active pane" M-j select-pane -D
        bind -n -N "Select pane above the active pane" M-k select-pane -U
        bind -n -N "Select pane to the right of the active pane" M-l select-pane -R

        bind -n -r -N "Resize the pane left by 5" M-H resize-pane -L 5
        bind -n -r -N "Resize the pane down by 5" M-J resize-pane -D 5
        bind -n -r -N "Resize the pane up by 5" M-K resize-pane -U 5
        bind -n -r -N "Resize the pane right by 5" M-L resize-pane -R 5
        bind -n M-n split-window -h -c "#{pane_current_path}"
        bind -n M-N split-window -v -c "#{pane_current_path}"

        # define sessions with Alt+F{1..4} for general purpose sessions
        bind -n M-F1 if 'tmux has-session -t 1' {switch-client -t 1} {display-popup -E -E 'create-tmux-session -i 1'}
        bind -n M-F2 if 'tmux has-session -t 2' {switch-client -t 2} {display-popup -E -E 'create-tmux-session -i 2'}
        bind -n M-F3 if 'tmux has-session -t 3' {switch-client -t 3} {display-popup -E -E 'create-tmux-session -i 3'}
        bind -n M-F4 if 'tmux has-session -t 4' {switch-client -t 4} {display-popup -E -E 'create-tmux-session -i 4'}

        # Alt+F10 for launching my Nix project
        bind -n M-F10 run 'create-tmux-session -n config -r nix "run:nvim ." vsplit:20'

        # change window with Alt+{1..5}
        bind -n -N "Goto window 1" M-1 select-window -T -t 1
        bind -n -N "Goto window 2" M-2 select-window -T -t 2
        bind -n -N "Goto window 3" M-3 select-window -T -t 3
        bind -n -N "Goto window 4" M-4 select-window -T -t 4
        bind -n -N "Goto window 5" M-5 select-window -T -t 5

        # Theme
        set -g status-interval 2
        setw -g automatic-rename on   # rename window to reflect current program
        set -g renumber-windows on    # renumber windows when a window is closed
        set -g set-titles on
        set -g mode-style bg=colour18,fg=colour7
        set -g set-titles-string "#T"
        set -g status-bg colour0
        set -g status-fg colour7
        set -g message-style bg=colour19,fg=colour7

        setw -g window-status-current-format '#[fg=colour18,bg=colour11] #I\
         #[bg=colour19,fg=colour7,bold] #W\
         #{?window_active,󰎂 ,}#{?window_marked_flag,󰃃 ,}#{?window_activity_flag, ,}#{?window_silence_flag,󰝟 ,}#{?window_zoomed_flag,󱀅 ,}'

        set -g pane-border-style fg=colour19
        set -g pane-active-border-style fg=colour4

        setw -g window-status-format '#[bg=color12,fg=colour19] #I\
         #[bg=colour18,fg=colour7,dim] #W\
         #{?window_last_flag, ,}#{?window_marked_flag,󰃃 ,}#{?window_activity_flag, ,}#{?window_silence_flag,󰝟 ,}#{?window_zoomed_flag,󱀅 ,}#{?window_bell_flag,#[bg=colour1]#[fg=colour15]#[none] ,}'
        setw -g window-status-bell-style bg=colour18,fg=colour7
        set -g status-left-length 100
        set -g status-left '#[bg=colour0, fg=colour6]  #S '
        set -g status-right ' '
      '' + cfg.extraConfig;
      plugins = with pkgs; [
        tmuxPlugins.tmux-fzf
      ];
    };
  };
}