#!/bin/bash
# build-cloudinit.sh — Compile the cloud-init binary as a static Linux binary
#
# Environment:
#   TARGET_ARCH  Target architecture (default: amd64, also supports: arm64)
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
CACHE_DIR="${CACHE_DIR:-$PROJECT_ROOT/build/cache}"
CLOUDINIT_SRC="$PROJECT_ROOT/cloud-init"
TARGET_ARCH="${TARGET_ARCH:-amd64}"

OUTPUT="$CACHE_DIR/kubesolo-cloudinit"

echo "==> Building cloud-init binary (linux/$TARGET_ARCH)..."

if ! command -v go >/dev/null 2>&1; then
    echo "ERROR: Go is not installed. Install Go 1.22+ to build cloud-init."
    echo "  https://go.dev/dl/"
    exit 1
fi

mkdir -p "$CACHE_DIR"

cd "$CLOUDINIT_SRC"

# Run tests first
echo "    Running tests..."
go test ./... -count=1 || {
    echo "ERROR: Tests failed. Fix tests before building."
    exit 1
}

# Build static binary
echo "    Compiling (CGO_ENABLED=0 GOOS=linux GOARCH=$TARGET_ARCH)..."
CGO_ENABLED=0 GOOS=linux GOARCH="$TARGET_ARCH" go build \
    -ldflags='-s -w' \
    -o "$OUTPUT" \
    ./cmd/

echo "    Built: $OUTPUT ($(du -h "$OUTPUT" | cut -f1))"
echo ""