# Build stage
FROM rust:1.91 AS builder

WORKDIR /usr/src/pop_imap_importer

# Copy manifests first to leverage Docker layer caching
COPY Cargo.* ./

# Create dummy source files to build dependencies
RUN mkdir -p src/bin && \
    echo "fn main() {}" > src/main.rs && \
    echo "" > src/lib.rs && \
    echo "fn main() {}" > src/bin/normalize_imap.rs && \
    echo "fn main() {}" > src/bin/fetch_email.rs && \
    echo "fn main() {}" > src/bin/list_uids.rs

# Build dependencies only - this will be cached as long as Cargo.toml/Cargo.lock don't change
RUN --mount=type=cache,target=/usr/local/cargo/registry \
    cargo build --release

# Copy the actual source code
COPY src src
# Touch source files to force rebuild
RUN touch src/main.rs src/lib.rs

# Build the actual application
RUN --mount=type=cache,target=/usr/local/cargo/registry \
    ls -lh target/release && \
    cargo build --release

# Runtime stage
FROM debian:bookworm-slim

# Install CA certificates and OpenSSL runtime libraries
RUN apt-get update && \
    apt-get install -y ca-certificates libssl3 && \
    rm -rf /var/lib/apt/lists/*

# RUN apt-get update && apt-get install -y extra-runtime-dependencies && rm -rf /var/lib/apt/lists/*
COPY --from=builder /usr/src/pop_imap_importer/target/release/pop-to-imap /usr/local/bin/pop_imap_importer

CMD ["pop_imap_importer"]