# Multi-stage build for Rust Coder Environment
# Build context: repo root (contains models.py, problems.json, pyproject.toml, uv.lock)
ARG BASE_IMAGE=ghcr.io/meta-pytorch/openenv-base:latest
FROM ${BASE_IMAGE} AS builder

# 1. Environment Setup
USER root
WORKDIR /app

# Install build essentials for Rust (linker, etc.)
RUN apt-get update && \
    apt-get install -y --no-install-recommends git curl build-essential ca-certificates && \
    rm -rf /var/lib/apt/lists/*

# 2. Create the non-root user (Hugging Face default)
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.cargo/bin:/home/user/.local/bin:$PATH

# 3. Install Rust toolchain as 'user'
RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable
RUN rustup toolchain install stable

# 4. Copy environment code and install Python dependencies
WORKDIR $HOME/app/env
COPY --chown=user . $HOME/app/env

# Install uv (if not present) and then the virtual environment
RUN if ! command -v uv >/dev/null 2>&1; then \
        curl -LsSf https://astral.sh/uv/install.sh | sh; \
    fi

RUN --mount=type=cache,target=/home/user/.cache/uv,uid=1000,gid=1000 \
    uv sync --no-editable

# -------------------------------------------------------------
# Final Runtime Stage
# -------------------------------------------------------------
FROM ${BASE_IMAGE}

USER root
RUN apt-get update && \
    apt-get install -y --no-install-recommends curl build-essential ca-certificates && \
    rm -rf /var/lib/apt/lists/*

# Create the user again in the final stage
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH="/home/user/app/env/.venv/bin:/home/user/.cargo/bin:$PATH" \
    PYTHONPATH="/home/user/app/env:$PYTHONPATH"

# Copy Cargo/Rustup from builder and then the local code
COPY --from=builder --chown=user /home/user/.cargo /home/user/.cargo
COPY --from=builder --chown=user /home/user/.rustup /home/user/.rustup

WORKDIR $HOME/app/env
COPY --chown=user . $HOME/app/env

# Install uv and Python dependencies in the FINAL stage
RUN curl -LsSf https://astral.sh/uv/install.sh | sh
RUN uv sync --no-editable

# -------------------------------------------------------------
# Final Config
# -------------------------------------------------------------
EXPOSE 8000
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD curl -f http://localhost:8000/health || exit 1

ENV ENABLE_WEB_INTERFACE=true
CMD ["/home/user/app/env/.venv/bin/uvicorn", "server.app:app", "--host", "0.0.0.0", "--port", "8000", "--log-level", "info"]