{ pkgs, ... }:

{
  environment.systemPackages = with pkgs; [
    direnv
    zsh-completions
    nix-zsh-completions
  ];

  programs.zsh = {
    enable = true;
    histSize = 1000000;

    shellInit = ''
      # Disable new user prompt
      if [ ! -e ~/.zshrc ]; then
        touch ~/.zshrc
      fi
    '';

    promptInit = ''
      # Note that to manually override this in ~/.zshrc you should run `prompt off`
      # before setting your PS1 and etc. Otherwise this will likely to interact with
      # your ~/.zshrc configuration in unexpected ways as the default prompt sets
      # a lot of different prompt variables.
      autoload -U promptinit && promptinit && prompt default && setopt prompt_sp
    '';

    # Taken from Ulli Kehrle config:
    # https://git.hrnz.li/Ulli/nixos/src/commit/2e203b8d8d671f4e3ced0f1744a51d5c6ee19846/profiles/shell.nix#L199-L205
    interactiveShellInit = ''
      source "${pkgs.zsh-history-substring-search}/share/zsh-history-substring-search/zsh-history-substring-search.zsh"

      # Save history immediately, but only load it when the shell starts
      setopt inc_append_history

      # dircolors doesn't support alacritty:
      # https://lists.gnu.org/archive/html/bug-coreutils/2019-05/msg00029.html
      export LS_COLORS='rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=00:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.zst=01;31:*.tzst=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.cab=01;31:*.wim=01;31:*.swm=01;31:*.dwm=01;31:*.esd=01;31:*.avif=01;35:*.jpg=01;35:*.jpeg=01;35:*.mjpg=01;35:*.mjpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.webp=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.oga=00;36:*.opus=00;36:*.spx=00;36:*.xspf=00;36:*~=00;90:*#=00;90:*.bak=00;90:*.old=00;90:*.orig=00;90:*.part=00;90:*.rej=00;90:*.swp=00;90:*.tmp=00;90:*.dpkg-dist=00;90:*.dpkg-old=00;90:*.ucf-dist=00;90:*.ucf-new=00;90:*.ucf-old=00;90:*.rpmnew=00;90:*.rpmorig=00;90:*.rpmsave=00;90:';

      # From Arch Linux and GRML
      bindkey "^R" history-incremental-pattern-search-backward
      bindkey "^S" history-incremental-pattern-search-forward

      # Auto rehash for new binaries
      zstyle ':completion:*' rehash true
      # show a nice menu with the matches
      zstyle ':completion:*' menu yes select

      bindkey '^[OA' history-substring-search-up   # Up
      bindkey '^[[A' history-substring-search-up   # Up

      bindkey '^[OB' history-substring-search-down # Down
      bindkey '^[[B' history-substring-search-down # Down

      bindkey '\e[1~' beginning-of-line            # Home
      bindkey '\e[7~' beginning-of-line            # Home
      bindkey '\e[H'  beginning-of-line            # Home
      bindkey '\eOH'  beginning-of-line            # Home

      bindkey '\e[4~' end-of-line                  # End
      bindkey '\e[8~' end-of-line                  # End
      bindkey '\e[F ' end-of-line                  # End
      bindkey '\eOF'  end-of-line                  # End

      bindkey '^?'    backward-delete-char         # Backspace
      bindkey '\e[3~' delete-char                  # Del
      # bindkey '\e[3;5~' delete-char                # sometimes Del, sometimes C-Del
      bindkey '\e[2~' overwrite-mode               # Ins

      bindkey '^H'      backward-kill-word         # C-Backspace

      bindkey '5~'      kill-word                  # C-Del
      bindkey '^[[3;5~' kill-word                  # C-Del
      bindkey '^[[3^'   kill-word                  # C-Del

      bindkey "^[[1;5H" backward-kill-line         # C-Home
      bindkey "^[[7^"   backward-kill-line         # C-Home

      bindkey "^[[1;5F" kill-line                  # C-End
      bindkey "^[[8^"   kill-line                  # C-End

      bindkey '^[[1;5C' forward-word               # C-Right
      bindkey '^[0c'    forward-word               # C-Right
      bindkey '^[[5C'   forward-word               # C-Right

      bindkey '^[[1;5D' backward-word              # C-Left
      bindkey '^[0d'    backward-word              # C-Left
      bindkey '^[[5D'   backward-word              # C-Left
    '';
  };
}