ARG IMAGE_TAG
FROM gitea.jde.nz/public/dropshell-build-base:latest AS builder

ARG PROJECT
ARG CMAKE_BUILD_TYPE=Debug

# Set working directory
WORKDIR /app

# Create cache directories
RUN mkdir -p /ccache

# Set up ccache
ENV CCACHE_DIR=/ccache
ENV CCACHE_COMPILERCHECK=content
ENV CCACHE_MAXSIZE=2G

# Copy only build files first (for better layer caching)
#COPY CMakeLists.txt cmake_prebuild.sh ./
#COPY src/version.hpp.in src/

# Run prebuild script early (this rarely changes)
#RUN bash cmake_prebuild.sh

# Copy source files (this invalidates cache when source changes)
COPY src/ src/
COPY CMakeLists.txt ./

# Configure project (this step is cached unless CMakeLists.txt changes)
RUN --mount=type=cache,target=/ccache \
    --mount=type=cache,target=/build \
    mkdir -p /build && \
    SSL_LIB=$(find /usr/local -name "libssl.a" | head -1) && \
    CRYPTO_LIB=$(find /usr/local -name "libcrypto.a" | head -1) && \
    echo "Found SSL: $SSL_LIB, Crypto: $CRYPTO_LIB" && \
    cmake -G Ninja -S /app -B /build \
    -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} \
    -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
    -DCMAKE_C_COMPILER_LAUNCHER=ccache \
    -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=mold -static -g" \
    -DCMAKE_CXX_FLAGS="-g -fno-omit-frame-pointer" \
    -DCMAKE_C_FLAGS="-g -fno-omit-frame-pointer" \
    -DPROJECT_NAME="${PROJECT}" \
    -DCMAKE_STRIP=OFF \
    -DOPENSSL_SSL_LIBRARY="$SSL_LIB" \
    -DOPENSSL_CRYPTO_LIBRARY="$CRYPTO_LIB" \
    -DOPENSSL_INCLUDE_DIR=/usr/local/include \
    ${CMAKE_TOOLCHAIN_FILE:+-DCMAKE_TOOLCHAIN_FILE=$CMAKE_TOOLCHAIN_FILE}

# Run prebuild script
#RUN --mount=type=cache,target=/ccache \
#    --mount=type=cache,target=/build \
#    cmake --build /build --target run_prebuild_script

# Build project (ccache will help here when only some files change)
RUN --mount=type=cache,target=/ccache \
    --mount=type=cache,target=/build \
    cmake --build /build

# Copy the built executables to a regular directory for the final stage
RUN --mount=type=cache,target=/build \
    mkdir -p /output && \
    find /build -type f -executable -name "*${PROJECT}*" -exec cp {} /output/${PROJECT} \; || \
    find /build -type f -executable -exec cp {} /output/${PROJECT} \; && \
    if [ -f /build/hash_token ]; then cp /build/hash_token /output/hash_token; fi

# Final stage that only contains the binaries
FROM scratch AS project

ARG PROJECT

# Copy the actual binaries from the regular directory
COPY --from=builder /output/${PROJECT} /${PROJECT}
COPY --from=builder /output/hash_token /hash_token

