#!/bin/bash

cd "$(dirname "$0")"

clone() {
    mkdir -p $1
    pushd $1
    git init
    git config advice.detachedHead false
    git fetch --depth=1 $2 $3
    git checkout FETCH_HEAD
    popd
}

# Commit hashes and sdk versions from https://android.googlesource.com/platform/manifest/+/refs/heads/androidx-main/default.xml

downloadLinuxSDK() {
    clone ../prebuilts/fullsdk-linux/platforms/android-31 https://android.googlesource.com/platform/prebuilts/fullsdk/platforms/android-31 master
    clone ../prebuilts/fullsdk-linux/sources/android-31 https://android.googlesource.com/platform/prebuilts/fullsdk/sources/android-31 master
    clone ../prebuilts/fullsdk-linux/ndk https://android.googlesource.com/toolchain/prebuilts/ndk/r23 master
    clone ../prebuilts/fullsdk-linux/build-tools/30.0.3 https://android.googlesource.com/platform/prebuilts/fullsdk-linux/build-tools/30.0.3 master
    clone ../prebuilts/fullsdk-linux/platform-tools https://android.googlesource.com/platform/prebuilts/fullsdk-linux/platform-tools 04de8f242a1ca2ef2b945590da2aa27c2c6ee1c7
    clone ../prebuilts/fullsdk-linux/tools https://android.googlesource.com/platform/prebuilts/fullsdk-linux/tools 2d5e66a40bd1e6d43ee458efea6f1dd5d5166a59
    clone ../prebuilts/fullsdk-linux/cmake https://android.googlesource.com/platform/prebuilts/cmake/linux-x86 a8e45194d73ebaded4639e11cf4021b267b36c2a
    clone ../prebuilts/fullsdk-linux/ninja https://android.googlesource.com/platform/prebuilts/ninja/linux-x86 8a10824f74fe0e22af9bf314a837f5b70e2bb67f
}

downloadMacOsSDK() {
    clone ../prebuilts/fullsdk-darwin/platforms/android-31 https://android.googlesource.com/platform/prebuilts/fullsdk/platforms/android-31 master
    clone ../prebuilts/fullsdk-darwin/sources/android-31 https://android.googlesource.com/platform/prebuilts/fullsdk/sources/android-31 master
    clone ../prebuilts/fullsdk-darwin/ndk https://android.googlesource.com/toolchain/prebuilts/ndk-darwin/r23 master
    clone ../prebuilts/fullsdk-darwin/build-tools/30.0.3 https://android.googlesource.com/platform/prebuilts/fullsdk-darwin/build-tools/30.0.3 master
    clone ../prebuilts/fullsdk-darwin/platform-tools https://android.googlesource.com/platform/prebuilts/fullsdk-darwin/platform-tools 5d86b65de9ec1aa7dc6102bc4dfd78b7ebfa213b
    clone ../prebuilts/fullsdk-darwin/tools https://android.googlesource.com/platform/prebuilts/fullsdk-darwin/tools 204b8813ffedef10214a4afe04c843f1ee9e4fe7
    clone ../prebuilts/fullsdk-darwin/cmake https://android.googlesource.com/platform/prebuilts/cmake/darwin-x86 6d71b61804c87b3f86eca51583e2ada093fa9267
    clone ../prebuilts/fullsdk-darwin/ninja https://android.googlesource.com/platform/prebuilts/ninja/darwin-x86 f321e197944c19d273cec788b9a3e8ca94331248
}

setupNativeBuildTools() {
    mkdir -p ../prebuilts/fullsdk-$1/native-build-tools/bin/
    pushd ../prebuilts/fullsdk-$1/native-build-tools/bin/
    ln -s ../../ninja/ninja .
    ln -s ../../cmake/bin/cmake .
    popd
}

if [[ "$OSTYPE" == "linux-gnu"* ]]; then
    downloadLinuxSDK
    setupNativeBuildTools linux
elif [[ "$OSTYPE" == "darwin"* ]]; then
    downloadMacOsSDK
    setupNativeBuildTools darwin
elif [[ "$OSTYPE" == "cygwin" ]]; then
    echo "Please download Android SDK manually (https://developer.android.com/studio)"
elif [[ "$OSTYPE" == "msys" ]]; then
    echo "Please download Android SDK manually (https://developer.android.com/studio)"
elif [[ "$OSTYPE" == "win32" ]]; then
    echo "Please download Android SDK manually (https://developer.android.com/studio)"
else
    echo "Unknown OS"
fi