#!/usr/bin/env bash
# Офлайн-сборка APK arc-shot напрямую через Android build-tools (без Gradle/AGP).
# Использует только локальный SDK + android.jar. Требует: javac (JDK 17+), Android SDK.
set -euo pipefail

cd "$(dirname "$0")"

SDK="${ANDROID_SDK_ROOT:-${ANDROID_HOME:-$HOME/Library/Android/sdk}}"
BT_VER="${BT_VER:-35.0.1}"
PLATFORM="${PLATFORM:-android-34}"
MIN_SDK="${MIN_SDK:-24}"
TARGET_SDK="${TARGET_SDK:-34}"

BT="$SDK/build-tools/$BT_VER"
ANDROID_JAR="$SDK/platforms/$PLATFORM/android.jar"

[ -d "$BT" ] || { echo "build-tools $BT_VER not found at $BT"; exit 1; }
[ -f "$ANDROID_JAR" ] || { echo "android.jar not found at $ANDROID_JAR"; exit 1; }

OUT="build"
rm -rf "$OUT"
mkdir -p "$OUT/classes" "$OUT/dex"

echo "[1/6] javac"
find src/main/java -name '*.java' > "$OUT/sources.txt"
javac --release 17 -classpath "$ANDROID_JAR" -d "$OUT/classes" @"$OUT/sources.txt"

echo "[2/6] d8 -> classes.dex"
CLASSES=$(find "$OUT/classes" -name '*.class')
"$BT/d8" --min-api "$MIN_SDK" --lib "$ANDROID_JAR" --output "$OUT/dex" $CLASSES

echo "[3/6] aapt2 link"
"$BT/aapt2" link \
    -o "$OUT/app-unsigned.apk" \
    -I "$ANDROID_JAR" \
    --manifest src/main/AndroidManifest.xml \
    --min-sdk-version "$MIN_SDK" \
    --target-sdk-version "$TARGET_SDK"

echo "[4/6] add classes.dex"
cp "$OUT/dex/classes.dex" "$OUT/classes.dex"
( cd "$OUT" && zip -j -q app-unsigned.apk classes.dex )

echo "[5/6] zipalign"
"$BT/zipalign" -f -p 4 "$OUT/app-unsigned.apk" "$OUT/app-aligned.apk"

echo "[6/6] sign"
# Keystore держим ВНЕ build/ — иначе rm -rf build стирает ключ и подпись меняется
# каждую пересборку (INSTALL_FAILED_UPDATE_INCOMPATIBLE при обновлении на устройстве).
KS="debug.keystore"
if [ ! -f "$KS" ]; then
    keytool -genkeypair -keystore "$KS" -storepass android -keypass android \
        -alias androiddebugkey -keyalg RSA -keysize 2048 -validity 10000 \
        -dname "CN=Android Debug,O=Android,C=US" >/dev/null 2>&1
fi
"$BT/apksigner" sign \
    --ks "$KS" --ks-pass pass:android --ks-key-alias androiddebugkey --key-pass pass:android \
    --out "$OUT/arc-shot.apk" "$OUT/app-aligned.apk"

echo "OK -> $OUT/arc-shot.apk"
"$BT/aapt2" dump badging "$OUT/arc-shot.apk" 2>/dev/null | grep -E "package:|launchable-activity:|uses-permission: name='android.permission.(MANAGE_EXTERNAL_STORAGE|FOREGROUND_SERVICE)'" || true