# =============================================================
# Stage 1: Build rtlamr from source (Go)
# =============================================================
FROM golang:1.24-bookworm AS go-builder

RUN go install github.com/bemasher/rtlamr@latest

# =============================================================
# Stage 2: Build rtl-sdr tools from source (C)
# =============================================================
FROM debian:bookworm-slim AS sdr-builder

RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential cmake pkg-config git ca-certificates libusb-1.0-0-dev \
    && rm -rf /var/lib/apt/lists/*

RUN git clone https://github.com/osmocom/rtl-sdr.git /tmp/rtl-sdr \
    && cd /tmp/rtl-sdr \
    && mkdir build && cd build \
    && cmake .. -DINSTALL_UDEV_RULES=ON -DDETACH_KERNEL_DRIVER=ON \
    && make -j"$(nproc)" \
    && make install

# =============================================================
# Stage 3: Python runtime
# =============================================================
FROM python:3.13-slim-bookworm

LABEL maintainer="HAMeter"
LABEL description="SDR utility meter reader for Home Assistant"

# Runtime dependency for rtl-sdr
RUN apt-get update && apt-get install -y --no-install-recommends \
    libusb-1.0-0 \
    && rm -rf /var/lib/apt/lists/*

# Copy compiled binaries from builder stages
COPY --from=go-builder /go/bin/rtlamr /usr/local/bin/rtlamr
COPY --from=sdr-builder /usr/local/bin/rtl_tcp /usr/local/bin/rtl_tcp
COPY --from=sdr-builder /usr/local/lib/librtlsdr* /usr/local/lib/
RUN ldconfig

# Install Python dependencies
COPY requirements.txt /app/requirements.txt
RUN pip install --no-cache-dir -r /app/requirements.txt

# Copy application code
COPY hameter/ /app/hameter/

WORKDIR /app

# Web UI port
EXPOSE 9090

# Persistent config storage
VOLUME /data

# Docker sends SIGTERM on stop; we handle it gracefully
STOPSIGNAL SIGTERM

ENTRYPOINT ["python", "-m", "hameter"]