# syntax=docker/dockerfile:1

# Windows on ARM64 cross-build environment (aarch64-w64-mingw32), isolated from
# the x86_64 Windows image and the Linux images.
#
# Toolchain: the same multi-target llvm-mingw as Dockerfile.win (clang + libc++ +
# the libc++ `std` module, MSVCRT runtime), targeting aarch64. The official SDL
# release ships no MinGW ARM64 dev package, so SDL3 comes from MSYS2's clangarm64
# repository, staged into the `<triple>/{include,lib,bin}` layout the toolchain
# expects.

FROM ubuntu:26.04 AS dev

ENV DEBIAN_FRONTEND=noninteractive

ARG APT_MIRROR=""
RUN if [ -n "$APT_MIRROR" ]; then \
        sed -i -e "s|http://archive.ubuntu.com/ubuntu|${APT_MIRROR}|g" \
               -e "s|http://security.ubuntu.com/ubuntu|${APT_MIRROR}|g" \
               -e "s|http://ports.ubuntu.com/ubuntu-ports|${APT_MIRROR}|g" \
               /etc/apt/sources.list /etc/apt/sources.list.d/*.sources 2>/dev/null || true; \
    fi

RUN --mount=type=cache,target=/var/lib/apt,sharing=locked \
    --mount=type=cache,target=/var/cache/apt,sharing=locked \
    for attempt in 1 2 3 4 5; do \
        apt-get -o Acquire::Retries=5 update && break; \
        echo "apt-get update failed (attempt $attempt), retrying"; \
        sleep 5; \
    done \
    && apt-get -o Acquire::Retries=5 install -y --no-install-recommends \
        ca-certificates \
        cmake \
        curl \
        ninja-build \
        python3 \
        xz-utils \
        zstd \
    && rm -rf /var/lib/apt/lists/*

# Pinned toolchain + SDL3 versions (override with --build-arg to bump).
ARG LLVM_MINGW_VERSION=20260908
ARG LLVM_MINGW_FLAVOR=msvcrt
# SDL3 for aarch64-w64-mingw32 from MSYS2's clangarm64 repo (name includes the
# MSYS2 package release, hence the `-1`).
ARG MSYS2_SDL3_PKG=mingw-w64-clang-aarch64-sdl3-3.4.16-1-any.pkg.tar.zst

RUN mkdir -p /opt/llvm-mingw \
    && curl -fL "https://github.com/mstorsjo/llvm-mingw/releases/download/${LLVM_MINGW_VERSION}/llvm-mingw-${LLVM_MINGW_VERSION}-${LLVM_MINGW_FLAVOR}-ubuntu-22.04-x86_64.tar.xz" \
        | tar -xJ -C /opt/llvm-mingw --strip-components=1

RUN mkdir -p /opt/sdl3-aarch64/aarch64-w64-mingw32/include /opt/sdl3-aarch64/aarch64-w64-mingw32/lib /opt/sdl3-aarch64/aarch64-w64-mingw32/bin \
    && curl -fL "https://repo.msys2.org/mingw/clangarm64/${MSYS2_SDL3_PKG}" -o /tmp/sdl3.pkg.tar.zst \
    && mkdir -p /tmp/sdl3 && tar --zstd -xf /tmp/sdl3.pkg.tar.zst -C /tmp/sdl3 \
    && cp -r /tmp/sdl3/clangarm64/include/SDL3 /opt/sdl3-aarch64/aarch64-w64-mingw32/include/ \
    && cp /tmp/sdl3/clangarm64/lib/libSDL3.dll.a /opt/sdl3-aarch64/aarch64-w64-mingw32/lib/ \
    && cp /tmp/sdl3/clangarm64/bin/SDL3.dll /opt/sdl3-aarch64/aarch64-w64-mingw32/bin/ \
    && rm -rf /tmp/sdl3 /tmp/sdl3.pkg.tar.zst

ENV OPENRA3_LLVM_MINGW_ROOT=/opt/llvm-mingw
ENV OPENRA3_SDL3_ROOT=/opt/sdl3-aarch64

WORKDIR /work
COPY . .

RUN cmake -S . -B build/windows-arm64 -G Ninja \
        -DCMAKE_TOOLCHAIN_FILE=cmake/toolchains/llvm-mingw-aarch64.cmake \
        -DCMAKE_BUILD_TYPE=Release \
    && cmake --build build/windows-arm64 -j \
    && (cd build/windows-arm64 && cpack -G ZIP)

# package target: the .exe plus the SDL3 runtime DLL.
FROM ubuntu:26.04 AS package

WORKDIR /app
COPY --from=dev /work/build/windows-arm64/bin/openra3.exe /app/
COPY --from=dev /work/build/windows-arm64/bin/SDL3.dll /app/