# syntax=docker/dockerfile:1

# Windows cross-build environment (x86_64), fully isolated from the Linux image
# in Dockerfile so the two toolchains and standard libraries never interfere.
#
# Toolchain: llvm-mingw (clang + libc++ + the libc++ `std` module, MSVCRT
# runtime) with the official SDL3 MinGW development package.

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 \
    && 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
ARG SDL3_VERSION=3.4.16

RUN mkdir -p /opt/llvm-mingw /opt/sdl3-mingw \
    && curl -fL "https://github.com/mstorsjo/llvm-mingw/releases/download/${LLVM_MINGW_VERSION}/llvm-mingw-${LLVM_MINGW_VERSION}-${LLVM_MINGW_FLAVOR}-ubuntu-22.04-x86_64.tar.xz" \
        | tar -xJ -C /opt/llvm-mingw --strip-components=1 \
    && curl -fL "https://github.com/libsdl-org/SDL/releases/download/release-${SDL3_VERSION}/SDL3-devel-${SDL3_VERSION}-mingw.tar.gz" \
        | tar -xz -C /opt/sdl3-mingw --strip-components=1

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

WORKDIR /work
COPY . .

RUN cmake -S . -B build/windows -G Ninja \
        -DCMAKE_TOOLCHAIN_FILE=cmake/toolchains/llvm-mingw-x86_64.cmake \
        -DCMAKE_BUILD_TYPE=Release \
    && cmake --build build/windows -j

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

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