#!/usr/bin/env bash

function fs::write_file() {
  local src="$1"
  local dest="$2"

  if platform::is_windows; then
    # Windows: no sudo, just overwrite (assumes elevated shell if needed)
    mv "$src" "$dest"
    return $?
  fi

  # macOS / Linux
  sudo tee "$dest" >/dev/null < "$src"
}
function fs::sed_inplace() {
  local use_sudo=false
  local suffix=""
  local expr
  local file

  # Detect sudo flag
  if [[ "$1" == "--sudo" ]]; then
    use_sudo=true
    shift
  fi

  # Detect suffix
  if [[ "$1" == .* ]]; then
    suffix="$1"
    shift
  fi

  expr="$1"
  file="$2"

  local SUDO=""
  if $use_sudo && ! platform::is_windows; then
    SUDO="sudo"
  fi

  if platform::is_macos; then
    if [[ -z "$suffix" ]]; then
      $SUDO sed -i '' "$expr" "$file"
    else
      $SUDO sed -i "$suffix" "$expr" "$file"
    fi
  else
    if [[ -z "$suffix" ]]; then
      $SUDO sed -i "$expr" "$file"
    else
      $SUDO sed -i"$suffix" "$expr" "$file"
    fi
  fi
}
function fs::replace_block() {
  local file="$1"
  local start_marker="$2"
  local end_marker="$3"
  local content="$4"

  local tmp
  tmp="$(mktemp)"

  # Remove existing block safely (no regex, no sed)
  awk -v start="$start_marker" -v end="$end_marker" '
    $0 == start {skip=1; next}
    $0 == end   {skip=0; next}
    !skip
  ' "$file" > "$tmp"

  # Only add leading newline if file has content and doesn't already end with one
  if [[ -s "$tmp" ]]; then
    local last_char
    last_char="$(tail -c1 "$tmp")"
    [[ "$last_char" != "" ]] && printf "\n" >> "$tmp"
  fi

  printf "%s\n" "$content" >> "$tmp"

  echo "$tmp"
}