# Multi-stage build for GPUImage Swift package on Linux

FROM swift:4.2 AS builder

# Install system dependencies needed for OpenGL, GLUT, and Video4Linux
RUN apt-get update && apt-get install -y --no-install-recommends \
    libgl1-mesa-dev \
    freeglut3-dev \
    libxrandr-dev \
    libxinerama-dev \
    libxi-dev \
    libxcursor-dev \
    libv4l-dev \
    libgd-dev \
    pkg-config \
 && rm -rf /var/lib/apt/lists/*

# Copy the source into the container and build
WORKDIR /workspace
COPY . .

# Build the Swift package in release mode
RUN swift build -c release

# Runtime image
FROM debian:bullseye-slim AS runtime

# Install runtime OpenGL and Video4Linux related libraries
RUN apt-get update && apt-get install -y --no-install-recommends \
    libgl1-mesa-dri \
    libgl1-mesa-glx \
    freeglut3 \
    libv4l-0 \
    pkg-config \
 && rm -rf /var/lib/apt/lists/*

# Copy the built artifacts from the builder
COPY --from=builder /workspace/.build /workspace/.build
WORKDIR /workspace

# Default to an interactive shell so the container remains usable
CMD ["/bin/bash"]