# ncli/lib.nix — Shared helpers and utilities
{ pkgs, host, project, backupFiles }:

let
  backupFilesString = pkgs.lib.strings.concatStringsSep " " backupFiles;
in
{
  # --- Injected config ---
  inherit pkgs host project backupFiles backupFilesString;

  # --- Color / banner source ---
  colorsSource = "$HOME/${project}/other/colors.sh";

  # --- Backup helper ---
  handle_backups = ''
    handle_backups() {
      echo "Checking for backup files to remove..."
      found=0
      for file_path in "''${BACKUP_FILES[@]}"; do
        full_path="$HOME/$file_path"
        if [ -f "$full_path" ]; then
          echo "Removing stale backup file: $full_path"
          rm "$full_path"
          found=1
        fi
      done
      if [ "$found" -eq 0 ]; then
        echo "No stale backup files found."
      fi
    }
  '';

  # --- OOM / build error handler ---
  handle_build_error = ''
    handle_build_error() {
      local exit_code=$?
      if [ "$exit_code" -eq 137 ]; then
        echo ""
        echo -e "''${RED}╔══════════════════════════════════════════════════════════╗''${NOCOLOR}"
        echo -e "''${RED}║  BUILD KILLED — Signal 9 (SIGKILL) detected              ║''${NOCOLOR}"
        echo -e "''${RED}╚══════════════════════════════════════════════════════════╝''${NOCOLOR}"
        echo ""
        echo -e "''${YELLOW}What happened:''${NOCOLOR}"
        echo "  The build process was forcefully terminated by the OS."
        echo "  This is almost always the Linux kernel OOM killer running out"
        echo "  of RAM + swap during Nix evaluation or compilation."
        echo ""
        echo -e "''${YELLOW}Suggested fixes (try in order):''${NOCOLOR}"
        echo ""
        echo -e "  ''${GREEN}1. Reduce parallel jobs''${NOCOLOR} (lowest RAM usage):"
        echo "     sudo nixos-rebuild switch --flake . --max-jobs 1 --cores 1"
        echo ""
        echo -e "  ''${GREEN}2. Confirm OOM killer fired:''${NOCOLOR}"
        echo "     journalctl -k --since '5 minutes ago' | grep -i oom"
        echo ""
      fi
    }
  '';

  # --- Print helpers (used by dev init) ---
  print_header = ''
    print_header() {
      echo ""
      echo -e "''${BLUE}==============================================''${NOCOLOR}"
      echo -e "''${BLUE}   Nix Flake Development Environment Initializer''${NOCOLOR}"
      echo -e "''${BLUE}==============================================''${NOCOLOR}"
      echo ""
    }
  '';

  print_success = ''
    print_success() {
      echo -e "''${GREEN}[OK]''${NOCOLOR} $1"
    }
  '';

  print_error = ''
    print_error() {
      echo -e "''${RED}[ERR]''${NOCOLOR} $1"
    }
  '';

  print_info = ''
    print_info() {
      echo -e "''${YELLOW}[->]''${NOCOLOR} $1"
    }
  '';
}