#!/usr/bin/env bash
# Builds tethercore for Android and drops the artifacts the Gradle app needs:
#   - libtethercore.so per ABI → app/src/main/jniLibs/<abi>/
#   - Kotlin bindings → app/src/main/java/uniffi/tethercore/
#
# Requires the Android NDK + cargo-ndk (cargo install cargo-ndk) and
# ANDROID_NDK_HOME pointing at the NDK. Outputs are git-ignored.
set -euo pipefail
cd "$(dirname "$0")"

APP="../android/app/src/main"
ABIS=(arm64-v8a x86_64)

# Optional Cargo features, e.g. TETHER_FEATURES=iroh-transport for the iroh core.
# Plain string (not an array) for macOS bash 3.2 + `set -u`.
FEATURES="${TETHER_FEATURES:-}"
FEAT_ARGS=""
[ -n "$FEATURES" ] && FEAT_ARGS="--features $FEATURES" && echo "▸ features: $FEATURES"

if ! command -v cargo-ndk >/dev/null; then
  echo "missing cargo-ndk → cargo install cargo-ndk; also install the Android NDK and set ANDROID_NDK_HOME" >&2
  exit 1
fi

echo "▸ building .so for ${ABIS[*]}…"
rustup target add aarch64-linux-android x86_64-linux-android >/dev/null 2>&1 || true
# shellcheck disable=SC2086  # intentional word-split of FEAT_ARGS
cargo ndk -t arm64-v8a -t x86_64 -o "$APP/jniLibs" build --release $FEAT_ARGS

echo "▸ generating Kotlin bindings…"
# shellcheck disable=SC2086
cargo build --release --lib $FEAT_ARGS
cargo run --release --bin uniffi-bindgen -- \
  generate --library target/release/libtethercore.dylib \
  --language kotlin --out-dir "$APP/java"

echo "✅ done — open ../android in Android Studio (or ./gradlew :app:assembleDebug)."