#!/usr/bin/env bash
# Builds the Quest APK from a scratch, patched copy of engine/ (see
# android/engine-patches/ - engine/ itself is never modified) plus the
# Android SDL2/SDL2_mixer/fluidsynth-lite prebuilt into this image at
# /opt/prebuilt/android/*. Run via ../run-image.sh (or directly, if
# already inside this image - see the Makefile's `apk` target).
#
# Unlike build-engine.sh, this step needs network access: Gradle/AGP's
# own dependency resolution isn't prebuilt into the image (see
# build-image/Dockerfile's comment on that trade-off).
set -euo pipefail

REPO_ROOT="$(pwd)"
ANDROID_DIR="$REPO_ROOT/android"
SCRATCH_ENGINE="$REPO_ROOT/build/android-engine"

echo "== Preparing a scratch, patched copy of engine/ =="
rm -rf "$SCRATCH_ENGINE"
mkdir -p "$(dirname "$SCRATCH_ENGINE")"
cp -a "$REPO_ROOT/engine" "$SCRATCH_ENGINE"
for p in "$ANDROID_DIR"/engine-patches/*.patch; do
    patch -p1 -d "$SCRATCH_ENGINE" < "$p"
done

echo "== Wiring up prebuilt Android SDL2_mixer/fluidsynth-lite (BUNDLED mode, like the desktop build) =="
mkdir -p "$SCRATCH_ENGINE/build_ext/built_sdl_mixer" "$SCRATCH_ENGINE/build_ext/fluidsynth-lite"
cp -a /opt/prebuilt/android/sdl2_mixer/. "$SCRATCH_ENGINE/build_ext/built_sdl_mixer/"
mkdir -p "$SCRATCH_ENGINE/build_ext/fluidsynth-lite/src"
cp -a /opt/prebuilt/android/fluidsynth-lite/lib/. "$SCRATCH_ENGINE/build_ext/fluidsynth-lite/src/"
cp -a /opt/prebuilt/android/fluidsynth-lite/include/. "$SCRATCH_ENGINE/build_ext/fluidsynth-lite/include/"

echo "engineDir=$SCRATCH_ENGINE" > "$ANDROID_DIR/engine.properties"

echo "== Staging bundled assets (shaders, soundfont, get-assets text) =="
ASSETS_DIR="$ANDROID_DIR/app/src/main/assets"
rm -rf "$ASSETS_DIR"
mkdir -p "$ASSETS_DIR/shaders" "$ASSETS_DIR/res"
# GLES ports of engine/shaders/ (see android/gles-shaders/ and
# android/engine-patches/04-android-opengl-es-render.patch) - not
# engine/shaders/ itself, which is desktop-only GLSL.
cp -a "$ANDROID_DIR/gles-shaders/." "$ASSETS_DIR/shaders/"
cp "/opt/prebuilt/soundfont/default.sf2" "$ASSETS_DIR/res/soundfont.sf2"
cp "$REPO_ROOT/res/assets/GET_ASSETS_QUEST.txt" "$ASSETS_DIR/GET_ASSETS_QUEST.txt"

echo "== Staging prebuilt Android SDL2/SDL2_mixer/fluidsynth-lite .so's into jniLibs =="
JNI_LIBS_DIR="$ANDROID_DIR/app/src/main/jniLibs/arm64-v8a"
rm -rf "$ANDROID_DIR/app/src/main/jniLibs"
mkdir -p "$JNI_LIBS_DIR"
find /opt/prebuilt/android/sdl2/lib /opt/prebuilt/android/sdl2_mixer/lib /opt/prebuilt/android/fluidsynth-lite/lib \
    -name '*.so' -exec cp -a {} "$JNI_LIBS_DIR/" \;

echo "== Building the APK (gradlew assembleDebug) =="
cd "$ANDROID_DIR"
./gradlew --no-daemon assembleDebug

APK="$ANDROID_DIR/app/build/outputs/apk/debug/app-debug.apk"
[ -f "$APK" ] || { echo "BUILD FAIL: $APK not found after assembleDebug" >&2; exit 1; }

mkdir -p "$REPO_ROOT/dist"
cp "$APK" "$REPO_ROOT/dist/questshock-debug.apk"

echo "== Done =="
echo "APK: $REPO_ROOT/dist/questshock-debug.apk"