#!/bin/bash
# Add specified OpenWRT packages (from a text file) to .config without removing existing ones
# Author: Zhe Yuan
# Usage:
#   ./add-openwrt-packages.sh packages.txt
# Description:
#   - Reads package names from a text file (supports both newline or space separation)
#   - Adds missing CONFIG_PACKAGE_xxx=y entries to .config
#   - Keeps existing settings intact
#   - Reports missing packages
#   - Runs make defconfig at the end to sync dependencies

set -e
umask 022

# Check argument
if [ "$#" -ne 1 ]; then
  echo "❌ Usage: $0 <package_list.txt>"
  exit 1
fi

PKG_FILE="$1"

# Verify file exists
if [ ! -f "$PKG_FILE" ]; then
  echo "❌ Error: File not found: $PKG_FILE"
  exit 1
fi

# Verify we are in OpenWRT source root
if [ ! -d "package" ] || [ ! -f "Makefile" ]; then
  echo "❌ Error: Please run this script in the OpenWRT source root directory."
  exit 1
fi

# Ensure .config exists
if [ ! -f ".config" ]; then
  echo "⚙️  Generating initial .config..."
  make defconfig
fi

echo "📦 Reading packages from $PKG_FILE ..."

# Read all non-empty, non-comment lines, split by any whitespace
PACKAGES=$(grep -v '^[[:space:]]*$' "$PKG_FILE" | grep -v '^#' | tr '\n' ' ')

ADDED=()
MISSING=()

for pkg in $PACKAGES; do
  CONFIG_NAME="CONFIG_PACKAGE_${pkg}"

  # Skip if already enabled
  if grep -q "^${CONFIG_NAME}=y" .config; then
    echo "✅ Already enabled: $pkg"
    continue
  fi

  # Check if package exists in package/ or feeds/
  if ! find package feeds -type d -path "*/${pkg}" -mindepth 1 -maxdepth 3 2>/dev/null | grep -q .; then
    echo "⚠️  Package not found: $pkg"
    MISSING+=("$pkg")
    continue
  fi

  # Append package config
  echo "${CONFIG_NAME}=y" >> .config
  ADDED+=("$pkg")
  echo "➕ Added: $pkg"
done

# Run defconfig to sync dependencies
echo
echo "⚙️  Running make defconfig..."
make defconfig >/dev/null

echo
echo "✅ Done!"
echo "📋 Packages newly added: ${#ADDED[@]}"
[ ${#ADDED[@]} -gt 0 ] && echo "  → ${ADDED[*]}"
if [ ${#MISSING[@]} -gt 0 ]; then
  echo "⚠️  Packages not found (check feeds or spelling):"
  for m in "${MISSING[@]}"; do
    echo "   - $m"
  done
fi