# Alpine-based MUSL static binary builder for Ginxsom
# Produces truly portable binaries with zero runtime dependencies

ARG DEBUG_BUILD=false

FROM alpine:3.19 AS builder

# Re-declare build argument in this stage
ARG DEBUG_BUILD=false

# Install build dependencies
RUN apk add --no-cache \
    build-base \
    musl-dev \
    git \
    cmake \
    pkgconfig \
    autoconf \
    automake \
    libtool \
    openssl-dev \
    openssl-libs-static \
    zlib-dev \
    zlib-static \
    curl-dev \
    curl-static \
    sqlite-dev \
    sqlite-static \
    fcgi-dev \
    fcgi \
    linux-headers \
    wget \
    bash \
    nghttp2-dev \
    nghttp2-static \
    c-ares-dev \
    c-ares-static \
    libidn2-dev \
    libidn2-static \
    libunistring-dev \
    libunistring-static \
    libpsl-dev \
    libpsl-static \
    brotli-dev \
    brotli-static

# Set working directory
WORKDIR /build

# Build libsecp256k1 static (cached layer - only rebuilds if Alpine version changes)
RUN cd /tmp && \
    git clone https://github.com/bitcoin-core/secp256k1.git && \
    cd secp256k1 && \
    ./autogen.sh && \
    ./configure --enable-static --disable-shared --prefix=/usr \
        CFLAGS="-fPIC" && \
    make -j$(nproc) && \
    make install && \
    rm -rf /tmp/secp256k1

# Copy only submodule configuration and git directory
COPY .gitmodules /build/.gitmodules
COPY .git /build/.git

# Initialize submodules (cached unless .gitmodules changes)
RUN git submodule update --init --recursive

# Copy nostr_core_lib source files (cached unless nostr_core_lib changes)
COPY nostr_core_lib /build/nostr_core_lib/

# Build nostr_core_lib with required NIPs (cached unless nostr_core_lib changes)
# Disable fortification in build.sh to prevent __*_chk symbol issues
# NIPs: 001(Basic), 006(Keys), 013(PoW), 017(DMs), 019(Bech32), 042(Auth), 044(Encryption), 059(Gift Wrap)
RUN cd nostr_core_lib && \
    chmod +x build.sh && \
    sed -i 's/CFLAGS="-Wall -Wextra -std=c99 -fPIC -O2"/CFLAGS="-U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0 -Wall -Wextra -std=c99 -fPIC -O2"/' build.sh && \
    rm -f *.o *.a 2>/dev/null || true && \
    ./build.sh --nips=1,6,13,17,19,42,44,59

# Copy web interface files for embedding
COPY api/ /build/api/
COPY scripts/embed_web_files.sh /build/scripts/

# Create src directory and embed web files into C headers
RUN mkdir -p src && \
    chmod +x scripts/embed_web_files.sh && \
    ./scripts/embed_web_files.sh

# Copy Ginxsom source files LAST (only this layer rebuilds on source changes)
COPY src/ /build/src/
COPY include/ /build/include/

# Build Ginxsom with full static linking (only rebuilds when src/ changes)
# Disable fortification to avoid __*_chk symbols that don't exist in MUSL
# Use conditional compilation flags based on DEBUG_BUILD argument
RUN if [ "$DEBUG_BUILD" = "true" ]; then \
        CFLAGS="-g -O0 -DDEBUG"; \
        STRIP_CMD=""; \
        echo "Building with DEBUG symbols enabled"; \
    else \
        CFLAGS="-O2"; \
        STRIP_CMD="strip /build/ginxsom-fcgi_static"; \
        echo "Building optimized production binary"; \
    fi && \
    gcc -static $CFLAGS -Wall -Wextra -std=gnu99 \
    -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0 \
    -I. -Iinclude -Inostr_core_lib -Inostr_core_lib/nostr_core \
    -Inostr_core_lib/cjson -Inostr_core_lib/nostr_websocket \
    src/main.c src/admin_api.c src/admin_auth.c src/admin_event.c \
    src/admin_handlers.c src/admin_interface.c src/admin_commands.c \
    src/bud04.c src/bud06.c src/bud08.c src/bud09.c \
    src/request_validator.c src/relay_client.c \
    nostr_core_lib/nostr_core/core_relay_pool.c \
    -o /build/ginxsom-fcgi_static \
    nostr_core_lib/libnostr_core_x64.a \
    -lfcgi -lsqlite3 -lsecp256k1 -lssl -lcrypto -lcurl \
    -lnghttp2 -lcares -lidn2 -lunistring -lpsl -lbrotlidec -lbrotlicommon \
    -lz -lpthread -lm -ldl && \
    eval "$STRIP_CMD"

# Verify it's truly static
RUN echo "=== Binary Information ===" && \
    file /build/ginxsom-fcgi_static && \
    ls -lh /build/ginxsom-fcgi_static && \
    echo "=== Checking for dynamic dependencies ===" && \
    (ldd /build/ginxsom-fcgi_static 2>&1 || echo "Binary is static") && \
    echo "=== Build complete ==="

# Output stage - just the binary
FROM scratch AS output
COPY --from=builder /build/ginxsom-fcgi_static /ginxsom-fcgi_static