# zsh as CachyOS set it up (cachyos-zsh-config: oh-my-zsh, Powerlevel10k and the
# fish-like plugins), plus git, gh and ssh.
{
  config,
  lib,
  pkgs,
  ...
}:
{
  programs.zsh = {
    enable = true;

    # Same history file and sizes as before (oh-my-zsh's defaults), so your
    # history carries over.
    history = {
      path = "${config.home.homeDirectory}/.zsh_history";
      size = 50000;
      save = 10000;
      ignoreSpace = true;
      ignoreDups = true;
    };

    oh-my-zsh = {
      enable = true;
      plugins = [
        "git"
        "fzf"
        "extract"
      ];
      extraConfig = ''
        DISABLE_MAGIC_FUNCTIONS="true"
        ENABLE_CORRECTION="true"
        COMPLETION_WAITING_DOTS="true"
      '';
    };

    syntaxHighlighting.enable = true;
    autosuggestion.enable = true;
    historySubstringSearch.enable = true;

    plugins = [
      {
        name = "powerlevel10k";
        src = pkgs.zsh-powerlevel10k;
        file = "share/zsh-powerlevel10k/powerlevel10k.zsh-theme";
      }
    ];

    shellAliases = {
      make = "make -j$(nproc)";
      ninja = "ninja -j$(nproc)";
      n = "ninja";
      c = "clear";
      please = "sudo";
      tb = "nc termbin.com 9999";
      jctl = "journalctl -p 3 -xb";

      # The pacman ones, for NixOS.
      update = "nix flake update --flake ${config.dot.repoPath} && sudo nixos-rebuild switch --flake ${config.dot.repoPath}";
      rebuild = "sudo nixos-rebuild switch --flake ${config.dot.repoPath}";
      cleanup = "sudo nix-collect-garbage --delete-older-than 14d";
    };

    initContent = lib.mkMerge [
      # Powerlevel10k instant prompt. Must stay at the very top: anything that
      # may ask for input goes above it, everything else below.
      (lib.mkOrder 500 ''
        if [[ -r "''${XDG_CACHE_HOME:-$HOME/.cache}/p10k-instant-prompt-''${(%):-%n}.zsh" ]]; then
          source "''${XDG_CACHE_HOME:-$HOME/.cache}/p10k-instant-prompt-''${(%):-%n}.zsh"
        fi
      '')
      ''
        export HISTCONTROL=ignoreboth
        export HISTORY_IGNORE="(\&|[bf]g|c|clear|history|exit|q|pwd|* --help)"

        # Bold green headings in man pages.
        export LESS_TERMCAP_md="$(tput bold 2> /dev/null; tput setaf 2 2> /dev/null)"
        export LESS_TERMCAP_me="$(tput sgr0 2> /dev/null)"

        [[ ! -f ~/.p10k.zsh ]] || source ~/.p10k.zsh
        POWERLEVEL9K_DISABLE_CONFIGURATION_WIZARD=true
      ''
    ];
  };

  programs.fzf.enable = true;

  # "command not found" suggests the package to install, like pkgfile did.
  programs.nix-index.enable = true;
  programs.nix-index.enableZshIntegration = true;

  programs.bash.enable = true;

  programs.git = {
    enable = true;
    settings.user = {
      name = "Gustaf Granström";
      email = "gustaf@granstrm.com";
    };
  };

  # Also makes git use gh for GitHub credentials, as in your old .gitconfig.
  programs.gh = {
    enable = true;
    gitCredentialHelper.enable = true;
  };

  # ~/.ssh/config. Your keys, known_hosts and authorized_keys stay where they are
  # in ~/.ssh and are not part of this repo.
  programs.ssh = {
    enable = true;
    enableDefaultConfig = false;
    settings = {
      granstrm = {
        HostName = "granstrm.com";
        User = "root";
        IdentityFile = "~/.ssh/id_ed25519";
      };
      # Media center laptop, behind the Google Wifi (10.0.0.100), which
      # forwards port 2222 to the laptop's SSH.
      tv = {
        HostName = "10.0.0.100";
        Port = 2222;
        User = "tv";
        IdentityFile = "~/.ssh/id_ed25519";
      };
    };
  };

}