FROM debian:bookworm-slim

ARG FLUTTER_VERSION=3.38.9

LABEL org.opencontainers.image.title="gpb-flutter-sdk-linux"
LABEL org.opencontainers.image.description="Flutter SDK for Linux desktop CI builds"
LABEL org.opencontainers.image.version="${FLUTTER_VERSION}"

# Install dependencies for Flutter + Linux desktop builds
RUN apt-get update && apt-get install -y --no-install-recommends \
    curl \
    git \
    unzip \
    xz-utils \
    ca-certificates \
    clang \
    cmake \
    ninja-build \
    pkg-config \
    libgtk-3-dev \
    liblzma-dev \
    libstdc++-12-dev \
    && rm -rf /var/lib/apt/lists/*

ENV FLUTTER_HOME=/opt/flutter
ENV PATH="${FLUTTER_HOME}/bin:${FLUTTER_HOME}/bin/cache/dart-sdk/bin:${PATH}"

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

RUN git config --global --add safe.directory "${FLUTTER_HOME}"

# Configure for Linux desktop only
RUN flutter config --enable-linux-desktop \
    --no-enable-web \
    --no-enable-android \
    --no-enable-ios \
    --no-enable-macos-desktop \
    --no-enable-windows-desktop

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

RUN flutter doctor -v

WORKDIR /app