# Cross-platform build for Lethean blockchain binaries
# Produces Linux x86_64 and ARM64 binaries
# macOS and Windows need native build environments or cross-compilation toolchains
#
# Usage:
#   docker build -f Dockerfile.cross-build --target linux-x64 -o ./out .
#   docker build -f Dockerfile.cross-build --target linux-arm64 -o ./out .

# === Base builder ===
FROM ubuntu:24.04 AS base-builder
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update && apt-get install -y \
    build-essential cmake git python3 python3-pip \
    libboost-all-dev libssl-dev pkg-config curl \
    && pip3 install conan --break-system-packages \
    && rm -rf /var/lib/apt/lists/*
WORKDIR /build
COPY . /build/

# === Linux x86_64 ===
FROM base-builder AS linux-x64-build
ARG TESTNET=1
RUN make build CPU_CORES=$(nproc) TESTNET=${TESTNET} STATIC=1 || \
    (cd build/release && cmake --build . --parallel $(nproc))

FROM scratch AS linux-x64
COPY --from=linux-x64-build /build/build/release/src/lethean-* /

# === Linux ARM64 (cross-compile) ===
FROM base-builder AS linux-arm64-build
RUN apt-get update && apt-get install -y gcc-aarch64-linux-gnu g++-aarch64-linux-gnu
ARG TESTNET=1
# ARM64 cross-compilation requires CMAKE_TOOLCHAIN_FILE
# This is a placeholder — actual cross-compile needs Conan profile for aarch64
RUN echo "ARM64 cross-compilation requires additional setup. Use native ARM64 builder or QEMU."

FROM scratch AS linux-arm64
# Placeholder — use buildx with --platform=linux/arm64 for native ARM builds