{ config, pkgs, lib, libs, ... }:
{
  programs.zsh = {
    enable = true;
    enableCompletion = false;
    dotDir = ".config/zsh";

    shellAliases = {
      fetch = "git fetch --all --jobs=4 --progress --prune";
      run = "./run";
      pull = "git pull --autostash --jobs=4 --summary origin";
      rebase = "git rebase --autostash --stat";
      update = "fetch && rebase";
    };

    initExtra = ''
      if [ -f ~/.config/zsh/.p10k.zsh ]; then
        . ~/.config/zsh/.p10k.zsh
      fi

      eval "$(zoxide init zsh)"

      # Case insensitive autocompletion.
      zstyle ":completion:*" matcher-list "" "m:{a-zA-Z}={A-Za-z}" "r:|=*" "l:|=* r:|=*"
      autoload -Uz compinit && compinit

      # No arguments: `git status`
      # With arguments: acts like `git`
      g() {
        if [[ $# -gt 0 ]]; then
          git "$@"
        else
          git status
        fi
      }

      compdef g=git

      clear-ls-all() {
        clear
        exa -al
      }
      zle -N clear-ls-all
      bindkey '^K' clear-ls-all

      clear-git-status() {
        clear
        git status -sb .
      }
      zle -N clear-git-status
      bindkey '^G' clear-git-status

      # auto-completes aliases
      # enables to define
      # - normal aliases (completed with trailing space)
      # - blank aliases (completed without space)
      # - ignored aliases (not completed)

      # ignored aliases
      typeset -a ialiases
      ialiases=()

      ialias() {
        alias $@
        args="$@"
        args=''${args%%\=*}
        ialiases+=(''${args##* })
      }

      # blank aliases
      typeset -a baliases
      baliases=()

      balias() {
        alias $@
        args="$@"
        args=''${args%%\=*}
        baliases+=(''${args##* })
      }

      expand-alias-space() {
        [[ $LBUFFER =~ "\<(''${(j:|:)baliases})\$" ]]; insertBlank=$?
        if [[ ! $LBUFFER =~ "\<(''${(j:|:)ialiases})\$" ]]; then
          zle _expand_alias
        fi

        zle self-insert

        if [[ "$insertBlank" = "0" ]]; then
          zle backward-delete-char
        fi
      }

      zle -N expand-alias-space

      bindkey " " expand-alias-space
      bindkey -M isearch " " magic-space

      setopt auto_cd
      setopt auto_pushd
      setopt pushd_ignore_dups
      setopt pushdminus
    '';

    zplug = {
      enable = true;

      plugins = [
        { name = "mollifier/cd-gitroot"; }
        { name = "romkatv/powerlevel10k"; tags = [ as:theme depth:1 ]; }
        { name = "zsh-users/zsh-autosuggestions"; }
        { name = "zsh-users/zsh-completions"; }
        { name = "zsh-users/zsh-syntax-highlighting"; }
      ];
    };
  };
}