# Dockerfile for cross-compiling cpuminer-opt for Windows on Linux
FROM ubuntu:22.04

ENV DEBIAN_FRONTEND=noninteractive

# Install cross-compilation tools and some dependencies
RUN apt-get update && apt-get install -y \
    build-essential \
    autotools-dev \
    automake \
    autoconf \
    pkg-config \
    libtool \
    wget \
    curl \
    git \
    unzip \
    mingw-w64 \
    mingw-w64-tools \
    && rm -rf /var/lib/apt/lists/*

# Set up cross-compilation environment
ENV HOST=x86_64-w64-mingw32
ENV CC=${HOST}-gcc
ENV CXX=${HOST}-g++
ENV AR=${HOST}-ar
ENV STRIP=${HOST}-strip
ENV RANLIB=${HOST}-ranlib
ENV PKG_CONFIG=${HOST}-pkg-config

# Create build directory
WORKDIR /build

# Build zlib for Windows
RUN wget https://github.com/madler/zlib/archive/refs/tags/v1.3.1.tar.gz -O zlib-1.3.1.tar.gz && \
    tar -xzf zlib-1.3.1.tar.gz && \
    cd zlib-1.3.1 && \
    CC=${HOST}-gcc AR=${HOST}-ar RANLIB=${HOST}-ranlib ./configure --prefix=/usr/${HOST} --static && \
    make && make install && \
    cd .. && rm -rf zlib-1.3.1*

# Build GMP for Windows
RUN wget https://gmplib.org/download/gmp/gmp-6.3.0.tar.xz && \
    tar -xf gmp-6.3.0.tar.xz && \
    cd gmp-6.3.0 && \
    ./configure --host=${HOST} --prefix=/usr/${HOST} --enable-static --disable-shared && \
    make -j$(nproc) && make install && \
    cd .. && rm -rf gmp-6.3.0*

# Build a minimal OpenSSL for Windows (or we could skip this and just use system curl)
RUN wget https://www.openssl.org/source/openssl-3.0.15.tar.gz && \
    tar -xzf openssl-3.0.15.tar.gz && \
    cd openssl-3.0.15 && \
    ./Configure mingw64 --cross-compile-prefix=${HOST}- --prefix=/usr/${HOST} no-shared && \
    make -j$(nproc) && make install_sw && \
    cd .. && rm -rf openssl-3.0.15*

# Build libcurl for Windows
RUN wget https://curl.se/download/curl-8.8.0.tar.gz && \
    tar -xzf curl-8.8.0.tar.gz && \
    cd curl-8.8.0 && \
    ./configure --host=${HOST} --prefix=/usr/${HOST} \
        --with-openssl=/usr/${HOST} \
        --with-zlib=/usr/${HOST} \
        --enable-static --disable-shared \
        --disable-ldap --disable-ldaps \
        --without-libpsl --without-nghttp2 \
        --without-brotli --without-zstd && \
    make -j$(nproc) && make install && \
    cd .. && rm -rf curl-8.8.0*

# Build jansson for Windows
RUN wget https://github.com/akheron/jansson/releases/download/v2.14/jansson-2.14.tar.gz && \
    tar -xzf jansson-2.14.tar.gz && \
    cd jansson-2.14 && \
    ./configure --host=${HOST} --prefix=/usr/${HOST} --enable-static --disable-shared && \
    make -j$(nproc) && make install && \
    cd .. && rm -rf jansson-2.14*

# Set up environment for cross-compilation
ENV PKG_CONFIG_PATH="/usr/${HOST}/lib/pkgconfig"
ENV LDFLAGS="-L/usr/${HOST}/lib"
ENV CPPFLAGS="-I/usr/${HOST}/include"

# Copy cpuminer source
COPY cpuminer /build/cpuminer

WORKDIR /build/cpuminer

# Build script
RUN echo '#!/bin/bash\n\
set -e\n\
\n\
echo "Cleaning previous builds..."\n\
make clean || true\n\
rm -f config.status\n\
\n\
echo "Running autogen..."\n\
./autogen.sh\n\
\n\
echo "Configuring for Windows cross-compile..."\n\
./configure \\\n\
    --host=${HOST} \\\n\
    --with-curl=/usr/${HOST} \\\n\
    CFLAGS="-O3 -march=x86-64 -mtune=generic -msse2 -static" \\\n\
    LDFLAGS="-L/usr/${HOST}/lib -static" \\\n\
    CPPFLAGS="-I/usr/${HOST}/include"\n\
\n\
echo "Building cpuminer..."\n\
make -j$(nproc)\n\
\n\
echo "Stripping binary..."\n\
${STRIP} cpuminer.exe\n\
\n\
echo "Build complete! cpuminer.exe created."\n\
ls -la cpuminer.exe\n\
file cpuminer.exe\n\
' > /build/build-windows.sh && chmod +x /build/build-windows.sh

CMD ["/build/build-windows.sh"]