#!/bin/bash
# Build script for Alpine Linux base image
# Supports multi-arch: ARM64 (aarch64) and x86_64

set -e

ARCH="${ARCH:-$(uname -m)}"
ALPINE_VERSION="${ALPINE_VERSION:-3.19}"
IMAGE_NAME="archipelago/alpine-base"
TAG="${ALPINE_VERSION}-${ARCH}"

echo "🔨 Building Alpine Linux base image for ${ARCH}..."

# Map architecture names
case "$ARCH" in
    aarch64|arm64)
        BUILD_ARCH="arm64"
        PLATFORM="linux/arm64"
        ;;
    x86_64|amd64)
        BUILD_ARCH="amd64"
        PLATFORM="linux/amd64"
        ;;
    *)
        echo "❌ Unsupported architecture: $ARCH"
        exit 1
        ;;
esac

# Build the image
docker buildx build \
    --platform "$PLATFORM" \
    --file image-recipe/Dockerfile.alpine-base \
    --tag "${IMAGE_NAME}:${TAG}" \
    --tag "${IMAGE_NAME}:latest-${BUILD_ARCH}" \
    --load \
    .

echo "✅ Alpine base image built successfully!"
echo "   Image: ${IMAGE_NAME}:${TAG}"
echo "   Platform: ${PLATFORM}"