# Build stage
FROM rust:1.75-slim 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 to cache dependencies
RUN mkdir -p src && \
    echo "fn main() {}" > src/main.rs && \
    cargo build --release && \
    rm -rf src

# Copy actual source code
COPY src ./src

# Build release binary
RUN cargo build --release --bin api-gateway

# Runtime stage
FROM debian:bookworm-slim

# Install runtime dependencies
RUN apt-get update && apt-get install -y \
    ca-certificates \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Create non-root user
RUN useradd -m -u 1000 provisioning

# Copy binary from builder
COPY --from=builder /app/target/release/api-gateway /usr/local/bin/

# Switch to non-root user
USER provisioning
WORKDIR /app

# Expose port
EXPOSE 8085

# Set environment variables
ENV RUST_LOG=info
ENV SERVER_PORT=8085

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
    CMD curl -f http://localhost:8085/health || exit 1

# Run the binary
CMD ["api-gateway"]