#!/usr/bin/env bash
# fetch_sdk.sh - install Android SDK cmdline-tools + platform + build-tools from OFFICIAL Google source.
# Idempotent. Sets nothing permanent; prints the env vars to export.
# Only dl.google.com is used. Do NOT point this at third-party mirrors.
set -euo pipefail
SDK_ROOT="${ANDROID_SDK_ROOT:-${ANDROID_HOME:-$HOME/android-sdk}}"
PLATFORM="${ANDROID_PLATFORM_PKG:-platforms;android-34}"
BUILDTOOLS="${ANDROID_BUILDTOOLS_PKG:-build-tools;34.0.0}"
CLT_URL="${CLT_URL:-https://dl.google.com/android/repository/commandlinetools-linux-11076708_latest.zip}"

mkdir -p "$SDK_ROOT/cmdline-tools"
if [ ! -x "$SDK_ROOT/cmdline-tools/latest/bin/sdkmanager" ]; then
  echo "[*] Downloading Android command-line tools (official) ..."
  tmp="$(mktemp -d)"; curl -fL "$CLT_URL" -o "$tmp/clt.zip"
  unzip -q "$tmp/clt.zip" -d "$tmp"
  rm -rf "$SDK_ROOT/cmdline-tools/latest"; mkdir -p "$SDK_ROOT/cmdline-tools/latest"
  mv "$tmp/cmdline-tools/"* "$SDK_ROOT/cmdline-tools/latest/"
  rm -rf "$tmp"
fi
SDKM="$SDK_ROOT/cmdline-tools/latest/bin/sdkmanager"
yes | "$SDKM" --sdk_root="$SDK_ROOT" --licenses >/dev/null || true
"$SDKM" --sdk_root="$SDK_ROOT" "platform-tools" "$PLATFORM" "$BUILDTOOLS"
echo "[+] SDK ready at $SDK_ROOT"
echo "    export ANDROID_SDK_ROOT=$SDK_ROOT ANDROID_HOME=$SDK_ROOT"
echo "    export PATH=\$PATH:$SDK_ROOT/platform-tools:$SDK_ROOT/${BUILDTOOLS/;//}"