{
  config,
  lib,
  pkgs,
  userVars,
  ...
}:

{
  programs.zsh.enable = true;

  users.users."${userVars.username}".shell = pkgs.zsh;

  home-manager.users."${userVars.username}" = {
    programs.zsh = {
      enable = true;
      enableCompletion = false;
      autosuggestion.enable = true;
      syntaxHighlighting.enable = true;

      dotDir = "/home/${userVars.username}/.config/zsh";

      initContent = ''
        # -- GPG / SSH Configuration --
        export SSH_AUTH_SOCK="$(gpgconf --list-dirs agent-ssh-socket)"

        # Import Wayland environment to systemd for GUI tools (like pinentry-gnome3)
        if [ -n "$WAYLAND_DISPLAY" ]; then
          systemctl --user import-environment WAYLAND_DISPLAY DISPLAY DBUS_SESSION_BUS_ADDRESS 2>/dev/null
          dbus-update-activation-environment --systemd WAYLAND_DISPLAY DISPLAY DBUS_SESSION_BUS_ADDRESS 2>/dev/null
        fi

        # Automatically start dwl on TTY 1
        if [ -z "$DISPLAY" ] && [ -z "$WAYLAND_DISPLAY" ] && [ "$(tty)" = "/dev/tty1" ]; then
          exec dwl
        fi
      '';

      history = {
        size = 10000;
        save = 10000;
        path = "$HOME/.local/share/zsh/history";
        ignoreDups = true;
        ignoreAllDups = true;
        ignoreSpace = true;
        share = true;
        extended = true;
      };

      plugins = [
        {
          name = "fast-syntax-highlighting";
          src = pkgs.zsh-fast-syntax-highlighting.src;
        }
        {
          name = "zsh-autosuggestions";
          src = pkgs.zsh-autosuggestions.src;
        }
        {
          name = "zsh-history-substring-search";
          src = pkgs.zsh-history-substring-search.src;
        }
        {
          name = "fzf-tab";
          src = pkgs.zsh-fzf-tab.src;
        }
      ];

      shellAliases = {
        ls = "eza --group-directories-first";
        ll = "eza -l --group-directories-first --git";
        la = "eza -la --group-directories-first --git";
        lt = "eza --tree --level=2";
        cat = "bat --paging=never";
        grep = "grep --color=auto";
        gs = "git status -sb";
        gd = "git diff";
        gc = "git commit";
        gp = "git push";
        ga = "git add -A";
        gm = "git add -m";
        gl = "git log --oneline";
        cleanup = "sudo nix-collect-garbage -d";
        ".." = "cd ..";
        "..." = "cd ../..";
      };
    };

    programs.starship = {
      enable = true;
      enableZshIntegration = true;

      settings = {
        add_newline = false;
        command_timeout = 500;
        scan_timeout = 10;

        format = lib.concatStrings [
          "$directory"
          "$git_branch"
          "$git_status"
          "$nix_shell"
          "$python"
          "$c"
          "$rust"
          "$cmd_duration"
          "$jobs"
          "$line_break"
          "$character"
        ];

        character = {
          success_symbol = "[❯](bold green)";
          error_symbol = "[❯](bold red)";
          vimcmd_symbol = "[❮](bold yellow)";
        };

        directory = {
          style = "bold cyan";
          truncation_length = 3;
          truncate_to_repo = true;
          truncation_symbol = "…/";
          read_only = " 🔒";
        };

        git_branch = {
          style = "bold purple";
          format = "[$symbol$branch]($style) ";
          symbol = " ";
        };

        git_status = {
          style = "bold red";
          format = "([$all_status$ahead_behind]($style)) ";
          conflicted = "=";
          ahead = "⇡\${count}";
          behind = "⇣\${count}";
          diverged = "⇕⇡\${ahead_count}⇣\${behind_count}";
          staged = "+\${count}";
          modified = "!\${count}";
          untracked = "?\${count}";
          stashed = "\$";
        };

        nix_shell = {
          style = "bold blue";
          format = "[$symbol$state( \($name\))]($style) ";
          symbol = "❄ ";
          impure_msg = "impure";
          pure_msg = "pure";
        };

        python = {
          style = "bold yellow";
          format = "[$symbol( \($virtualenv\))]($style) ";
          symbol = " ";
          detect_extensions = [ "py" ];
          detect_files = [
            "pyproject.toml"
            "requirements.txt"
            "uv.lock"
          ];
        };

        c = {
          style = "bold dimmed white";
          format = "[$symbol($version(-$name))]($style) ";
          symbol = " ";
          detect_extensions = [
            "c"
            "h"
          ];
        };

        rust = {
          disabled = true;
        };

        cmd_duration = {
          style = "bold yellow";
          format = "[$duration]($style) ";
          min_time = 2000;
          show_notifications = false;
        };

        jobs = {
          style = "bold blue";
          symbol = "✦";
          number_threshold = 1;
        };

        aws.disabled = true;
        gcloud.disabled = true;
        docker_context.disabled = true;
        kubernetes.disabled = true;
        package.disabled = true;
        battery.disabled = true;
      };
    };

    programs.zoxide = {
      enable = true;
      enableZshIntegration = true;
    };

    programs.eza = {
      enable = true;
      enableZshIntegration = true;
      icons = "auto";
    };

    programs.bat = {
      enable = true;
      config = {
        theme = "ansi";
      };
    };

    programs.direnv = {
      enable = true;
      enableZshIntegration = true;
      nix-direnv.enable = true;
    };

    programs.fzf = {
      enable = true;
      enableBashIntegration = true;
      enableZshIntegration = true;
      defaultCommand = "fd --type f --hidden --exclude .git";
    };
  };
}