# Use a lightweight Rust image
FROM rust:1.82-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 Cargo files
COPY Cargo.toml Cargo.lock ./

# Create a dummy main.rs to cache dependencies
RUN mkdir src && echo "fn main() {}" > src/main.rs

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

# Copy actual source code
COPY src ./src

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

# Runtime image
FROM debian:bookworm-slim

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

WORKDIR /app

# Copy the binary from builder
COPY --from=builder /app/target/release/normogen-backend /app/normogen-backend

# Expose port
EXPOSE 8080

# Run the application
CMD ["./normogen-backend"]