FROM svrnty/base-distro:flutter-sdk-latest

ARG FLUTTER_VERSION=3.38.9

LABEL org.opencontainers.image.title="flutter-sdk-web"
LABEL org.opencontainers.image.description="Minimal Flutter SDK for Web/WASM CI builds"
LABEL org.opencontainers.image.version="${FLUTTER_VERSION}"

USER 0

# Download Flutter SDK and strip unnecessary files in a single layer
RUN curl -fsSL "https://storage.googleapis.com/flutter_infra_release/releases/stable/linux/flutter_linux_${FLUTTER_VERSION}-stable.tar.xz" \
      -o /tmp/flutter.tar.xz && \
    tar xf /tmp/flutter.tar.xz -C /opt && \
    rm /tmp/flutter.tar.xz && \
    rm -rf /opt/flutter/dev \
           /opt/flutter/examples \
           /opt/flutter/bin/cache/artifacts/engine/android-* \
           /opt/flutter/bin/cache/artifacts/engine/linux-* && \
    chown -R 65532:65532 /opt/flutter

# Mark git directory as safe and compact git history
RUN git config --global --add safe.directory /opt/flutter && \
    cd /opt/flutter && git gc --prune=all

USER 65532

# Configure for web-only (disable everything else)
RUN flutter config --enable-web \
    --no-enable-android \
    --no-enable-ios \
    --no-enable-linux-desktop \
    --no-enable-macos-desktop \
    --no-enable-windows-desktop

# Precache only web artifacts
RUN flutter precache --web \
    --no-android \
    --no-ios \
    --no-linux \
    --no-macos \
    --no-windows \
    --no-fuchsia \
    --no-universal

# Verify installation
RUN flutter doctor -v

WORKDIR /app