#!/bin/bash
# Builds Go binaries with configurable CGO/native options
# Usage: build-go.sh <build_type> <os> <arch> <source_path>

set -euo pipefail

BUILD_TYPE=${1:-native}
OS=${2:-linux}
ARCH=${3:-amd64}
SOURCE_PATH=${4:-cmd/api-server/main.go}

LDFLAGS="-s -w -X main.BuildHash=$(git rev-parse --short HEAD) -X main.BuildTime=$(date -u +%Y%m%d.%H%M%S)"

case $BUILD_TYPE in
    pure)
        export CGO_ENABLED=0
        TAGS=""
        SUFFIX="_${OS}_${ARCH}_pure"
        ;;
    cgo)
        export CGO_ENABLED=1
        TAGS=""
        SUFFIX="_${OS}_${ARCH}_cgo"
        ;;
    native)
        export CGO_ENABLED=1
        TAGS="native_libs"
        SUFFIX="_${OS}_${ARCH}_native"
        ;;
    *)
        echo "Unknown build type: $BUILD_TYPE"
        echo "Usage: $0 <pure|cgo|native> <os> <arch> <source_path>"
        exit 1
        ;;
esac

BINARY_NAME=$(basename "$SOURCE_PATH" .go)
OUTPUT="dist/fetch_ml_${BINARY_NAME}_${OS}_${ARCH}${SUFFIX}"

mkdir -p dist

echo "Building ${BINARY_NAME} (${BUILD_TYPE}) for ${OS}/${ARCH}..."
go build -tags="$TAGS" -ldflags="$LDFLAGS" -o "$OUTPUT" "$SOURCE_PATH"
echo "✓ Built: $OUTPUT"