# Terminal multiplexer configurations - Batteries-included developer setup
{
  inputs,
  lib,
  config,
  pkgs,
  ...
}: {
  home.packages = with pkgs; [
    # Required for some tmux plugins
    fzf
    # Optional multiplexers
    # zellij
  ];

  # Tmux configuration - Optimized for developer productivity
  programs.tmux = {
    enable = true;
    terminal = "tmux-256color";
    historyLimit = 50000; # Much larger scrollback
    baseIndex = 1; # Windows start at 1
    keyMode = "vi";
    mouse = true;
    prefix = "C-a"; # More ergonomic than C-b
    escapeTime = 0; # No delay for escape (important for vim)
    sensibleOnTop = true;
    
    plugins = with pkgs.tmuxPlugins; [
      # Core essentials
      sensible
      yank # System clipboard integration
      vim-tmux-navigator # Seamless vim/tmux pane navigation
      better-mouse-mode # Enhanced mouse support
      
      # Session persistence - survive reboots
      {
        plugin = resurrect;
        extraConfig = ''
          set -g @resurrect-strategy-nvim 'session'
          set -g @resurrect-capture-pane-contents 'on'
          set -g @resurrect-processes 'ssh nvim vim "~rails server" "~rails console"'
        '';
      }
      {
        plugin = continuum;
        extraConfig = ''
          set -g @continuum-restore 'on'
          set -g @continuum-save-interval '10'
        '';
      }
      
      # Fast copy with hints (like vimium)
      tmux-thumbs
      
      # Fuzzy session management
      {
        plugin = sessionx;
        extraConfig = ''
          set -g @sessionx-bind 'o'
          set -g @sessionx-zoxide-mode 'on'
        '';
      }
      
      # URL opening
      fzf-tmux-url
      
      # Theme - Catppuccin (mocha)
      {
        plugin = catppuccin;
        extraConfig = ''
          set -g @catppuccin_flavor 'mocha'
          set -g @catppuccin_window_status_style 'rounded'
          set -g @catppuccin_status_background 'default'
          
          # Window format
          set -g @catppuccin_window_number_position 'right'
          set -g @catppuccin_window_default_fill 'number'
          set -g @catppuccin_window_default_text '#W'
          set -g @catppuccin_window_current_fill 'number'
          set -g @catppuccin_window_current_text '#W'
          
          # Status bar modules
          set -g @catppuccin_status_modules_right 'session date_time'
          set -g @catppuccin_status_modules_left ''
          set -g @catppuccin_date_time_text '%H:%M'
        '';
      }
    ];

    extraConfig = ''
      # ============================================
      # GENERAL SETTINGS
      # ============================================
      
      # True color support
      set -ag terminal-overrides ",xterm-256color:RGB"
      set -ag terminal-overrides ",*256col*:Tc"
      
      # Undercurl support (for spell checking in nvim)
      set -as terminal-overrides ',*:Smulx=\E[4::%p1%dm'
      set -as terminal-overrides ',*:Setulc=\E[58::2::%p1%{65536}%/%d::%p1%{256}%/%{255}%&%d::%p1%{255}%&%d%;m'
      
      # Renumber windows when one is closed
      set -g renumber-windows on
      
      # Enable focus events (for vim autoread)
      set -g focus-events on
      
      # Faster command sequences
      set -s escape-time 0
      
      # Increase tmux messages display duration
      set -g display-time 4000
      
      # Status bar refresh interval
      set -g status-interval 5
      
      # Aggressive resize (useful when switching clients)
      setw -g aggressive-resize on
      
      # ============================================
      # KEY BINDINGS
      # ============================================
      
      # Split panes using | and - in current directory
      bind | split-window -h -c "#{pane_current_path}"
      bind - split-window -v -c "#{pane_current_path}"
      bind '"' split-window -v -c "#{pane_current_path}"
      bind % split-window -h -c "#{pane_current_path}"
      
      # New window in current directory
      bind c new-window -c "#{pane_current_path}"
      
      # Reload config
      bind r source-file ~/.config/tmux/tmux.conf \; display-message "Config reloaded!"

      # Quick pane switching with Alt+arrow (no prefix needed)
      bind -n M-Left select-pane -L
      bind -n M-Right select-pane -R
      bind -n M-Up select-pane -U
      bind -n M-Down select-pane -D
      
      # Quick pane switching with Alt+hjkl (vim style, no prefix)
      bind -n M-h select-pane -L
      bind -n M-l select-pane -R
      bind -n M-k select-pane -U
      bind -n M-j select-pane -D
      
      # Resize panes with prefix + HJKL
      bind -r H resize-pane -L 5
      bind -r J resize-pane -D 5
      bind -r K resize-pane -U 5
      bind -r L resize-pane -R 5
      
      # Quick window switching with Alt+number
      bind -n M-1 select-window -t 1
      bind -n M-2 select-window -t 2
      bind -n M-3 select-window -t 3
      bind -n M-4 select-window -t 4
      bind -n M-5 select-window -t 5
      bind -n M-6 select-window -t 6
      bind -n M-7 select-window -t 7
      bind -n M-8 select-window -t 8
      bind -n M-9 select-window -t 9
      
      # Switch to last window
      bind Space last-window
      
      # Switch to last session
      bind -r Tab switch-client -l
      
      # ============================================
      # COPY MODE (vi-style)
      # ============================================
      
      # Enter copy mode with prefix + v (in addition to [)
      bind v copy-mode
      
      # Vi-style selection in copy mode
      bind -T copy-mode-vi v send-keys -X begin-selection
      bind -T copy-mode-vi C-v send-keys -X rectangle-toggle
      bind -T copy-mode-vi y send-keys -X copy-selection-and-cancel
      
      # ============================================
      # POPUP WINDOWS (modern tmux feature)
      # ============================================
      
      # Quick terminal popup
      bind -n M-t display-popup -E -w 80% -h 80%
      
      # Git status popup
      bind g display-popup -E -w 80% -h 80% "lazygit || git status"
      
      # ============================================
      # SESSION MANAGEMENT
      # ============================================
      
      # Create new session
      bind S command-prompt -p "New session name:" "new-session -s '%%'"
      
      # Kill session
      bind X confirm-before -p "Kill session #S? (y/n)" kill-session
      
      # Detach other clients (claim session)
      bind D detach-client -a
    '';
  };
}