#!/bin/bash
set -euo pipefail

MODULE_PATH="source/package.json"
LOCK_PATH="source/package-lock.json"
NEW_NAME=""
NEW_VERSION=""
SELF_DELETE=false

function help() {
  echo "Usage: ./init.sh --name newname [--version x.y.z] [--once]"
  echo
  echo "If any args are missing, you'll be prompted like a good squirrel."
  exit 0
}

# === CLI Args ===
while [[ $# -gt 0 ]]; do
  case "$1" in
    --name) NEW_NAME="$2"; shift ;;
    --version) NEW_VERSION="$2"; shift ;;
    --once) SELF_DELETE=true ;;
    --help) help ;;
    *) echo "❌ Unknown option: $1"; help ;;
  esac
  shift
done

# === Prompt if lazy ===
[[ -z "$NEW_NAME" ]] && {
  read -rp "📦 Enter new module name (e.g. @fluff/my-module): " NEW_NAME
  [[ -z "$NEW_NAME" ]] && {
    echo "😡 You didn't enter a name. I’m leaving."
    exit 1
  }
}

[[ -z "$NEW_VERSION" ]] && {
  read -rp "🕒 Enter version [default: 0.0.1]: " user_version
  NEW_VERSION="${user_version:-0.0.1}"
}

echo "✨ Renaming module:"
echo "   → name:    $NEW_NAME"
echo "   → version: $NEW_VERSION"

# === Safety check ===
if [[ ! -f "$MODULE_PATH" ]]; then
  echo "💥 package.json not found at $MODULE_PATH"
  exit 1
fi

# === Requires jq ===
if ! command -v jq &>/dev/null; then
  echo "🧨 'jq' not installed."

  if [[ "$(uname)" == "Darwin" ]]; then
    read -rp "🍎 Install jq via brew? (y/n): " install_jq
    if [[ "$install_jq" =~ ^[Yy]$ ]]; then
      brew install jq || { echo "💔 brew failed. Exiting."; exit 1; }
    else
      echo "🧼 Cannot proceed without jq. Goodbye."
      exit 1
    fi
  elif [[ -f /etc/debian_version ]]; then
    read -rp "🐧 Install jq via apt? (y/n): " install_jq
    if [[ "$install_jq" =~ ^[Yy]$ ]]; then
      sudo apt-get update && sudo apt-get install -y jq || { echo "💔 apt-get failed. Exiting."; exit 1; }
    else
      echo "🧼 Cannot proceed without jq. Goodbye."
      exit 1
    fi
  else
    echo "🧽 Unknown OS. Please install 'jq' manually."
    exit 1
  fi
fi

# === Apply changes to package.json ===
tmpfile=$(mktemp)
jq ".name = \"$NEW_NAME\" | .version = \"$NEW_VERSION\"" "$MODULE_PATH" > "$tmpfile"
mv "$tmpfile" "$MODULE_PATH"
echo "📦 Updated $MODULE_PATH"

# === Apply changes to package-lock.json if it exists ===
if [[ -f "$LOCK_PATH" ]]; then
  tmp_lock=$(mktemp)
  jq ".name = \"$NEW_NAME\" | .version = \"$NEW_VERSION\"" "$LOCK_PATH" > "$tmp_lock"
  mv "$tmp_lock" "$LOCK_PATH"
  echo "🔒 Updated $LOCK_PATH"
else
  echo "⚠️ No lock file at $LOCK_PATH – skipping."
fi

echo "✅ Success! Module is now '$NEW_NAME@$NEW_VERSION'"

# === Self delete ===
if [[ "$SELF_DELETE" = true ]]; then
  echo "🗑️  Self-destructing..."
  rm -- "$0"
fi