FROM rust:1.75-slim-bullseye as builder

WORKDIR /app

# Install build dependencies
RUN apt-get update && apt-get install -y \
    pkg-config \
    libssl-dev \
    && rm -rf /var/lib/apt/lists/*

# Copy manifests
COPY Cargo.toml Cargo.lock* ./

# Create dummy source for dependency caching
RUN mkdir src && \
    echo "fn main() {}" > src/main.rs && \
    echo "pub fn dummy() {}" > src/lib.rs

# Build dependencies
RUN cargo build --release && \
    rm -rf src

# Copy actual source
COPY src ./src

# Build the actual application
RUN touch src/main.rs src/lib.rs && \
    cargo build --release

# Runtime stage
FROM debian:bullseye-slim

RUN apt-get update && apt-get install -y \
    ca-certificates \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Copy the binary
COPY --from=builder /app/target/release/memory-server /app/memory-server

# Create non-root user
RUN useradd -r -s /bin/false memoryservice
USER memoryservice

# Expose ports
EXPOSE 9091

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD echo "ping" | nc -z localhost 9091 || exit 1

# Environment defaults
ENV RUST_LOG=info
ENV MEMORY_BIND_ADDR=0.0.0.0:9091

CMD ["/app/memory-server"]