#!/usr/bin/env bash
# ============================================================
# Kordant Release AAB Builder
# ============================================================
#
# Builds a signed Android App Bundle (AAB) for Google Play.
#
# Usage:
#   ./scripts/build-release-aab.sh
#   ./scripts/build-release-aab.sh --variant=prodRelease
#   ./scripts/build-release-aab.sh --variant=devRelease
#
# Prerequisites:
#   - key.properties configured (see key.properties.template)
#   - Android SDK and build tools installed
#   - Google Services JSON file in app/ (if using Firebase)
#
# Output:
#   - app/build/outputs/bundle/prodRelease/app-prod-release.aab
#   - app/build/outputs/bundle/devRelease/app-dev-release.aab
# ============================================================

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
VARIANT="prodRelease"

# Parse arguments
for arg in "$@"; do
    case $arg in
        --variant=*)
            VARIANT="${arg#*=}"
            shift
            ;;
        --help|-h)
            echo "Usage: $0 [--variant=prodRelease|devRelease]"
            echo ""
            echo "Options:"
            echo "  --variant    Build variant (default: prodRelease)"
            echo "  --help       Show this help message"
            exit 0
            ;;
    esac
done

cd "$PROJECT_DIR"

echo "============================================"
echo "  Kordant Release AAB Builder"
echo "============================================"
echo ""
echo "Variant: $VARIANT"
echo ""

# Check for key.properties
if [ ! -f "key.properties" ]; then
    echo "ERROR: key.properties not found."
    echo ""
    echo "Create it from the template:"
    echo "  cp key.properties.template key.properties"
    echo "  # Then edit key.properties with your credentials"
    echo ""
    echo "Or generate a new keystore:"
    echo "  ./scripts/generate-release-key.sh"
    exit 1
fi

# Check for google-services.json (needed for Firebase)
if [ ! -f "app/google-services.json" ]; then
    echo "WARNING: google-services.json not found in app/"
    echo "Firebase features (FCM, Crashlytics) will not work."
    echo "Download from Firebase Console → Project Settings → Your apps"
    echo ""
fi

# Run the build
echo "Building $VARIANT..."
echo ""

./gradlew "bundle${VARIANT}" \
    --no-daemon \
    --parallel \
    --build-cache \
    -Pandroid.injected.signing.storefile="$(pwd)/kordant-release.keystore" \
    2>&1 | tail -50

BUILD_STATUS=$?

if [ $BUILD_STATUS -ne 0 ]; then
    echo ""
    echo "ERROR: Build failed with exit code $BUILD_STATUS"
    echo ""
    echo "Common issues:"
    echo "  1. key.properties has wrong credentials"
    echo "  2. Keystore file missing or corrupted"
    echo "  3. Android SDK not configured in local.properties"
    echo "  4. google-services.json missing"
    exit $BUILD_STATUS
fi

# Find the AAB
AAB_PATH="app/build/outputs/bundle/${VARIANT}/app-${VARIANT}.aab"
if [ -f "$AAB_PATH" ]; then
    AAB_SIZE=$(du -h "$AAB_PATH" | cut -f1)
    echo ""
    echo "✓ Build successful!"
    echo ""
    echo "AAB: $AAB_PATH"
    echo "Size: $AAB_SIZE"
    echo ""
    echo "Upload to Google Play Console:"
    echo "  1. Go to Play Console → Testing → Internal testing"
    echo "  2. Click 'Create new release'"
    echo "  3. Upload $AAB_PATH"
    echo ""
else
    echo ""
    echo "ERROR: AAB not found at expected path: $AAB_PATH"
    echo ""
    echo "Looking for any AAB files..."
    find app/build/outputs/bundle -name "*.aab" 2>/dev/null || echo "No AAB files found."
    exit 1
fi

# Generate bundle report
echo "Bundle contents:"
echo ""
if command -v bundletool &> /dev/null; then
    bundletool dump manifest --module-path="$AAB_PATH" --dump-mode=MERGED_MANIFEST 2>/dev/null | head -30 || true
else
    echo "(bundletool not installed — install with: sdkmanager \"bundle-tools\")"
fi

echo ""
echo "============================================"