# Librespot (Spotify Connect) for ARM64
# Multi-stage: cross-compile Rust app on x86_64 builder, ship slim runtime.
# Audio output: PulseAudio (connect to audio-bridge via TCP localhost:4713).

FROM rust:1.85.1-bookworm AS builder

# Cross-compile toolchain for aarch64
RUN rustup target add aarch64-unknown-linux-gnu
RUN dpkg --add-architecture arm64 \
 && apt-get update \
 && apt-get install -y --no-install-recommends \
      gcc-aarch64-linux-gnu \
      libpulse-dev:arm64 \
      libasound2-dev:arm64 \
      libssl-dev:arm64 \
 && rm -rf /var/lib/apt/lists/*

# Build librespot. Pin to a known tag.
ARG LIBRESPOT_VERSION=v0.8.0
RUN git clone --depth 1 --branch ${LIBRESPOT_VERSION} \
        https://github.com/librespot-org/librespot.git /src
WORKDIR /src
ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc
RUN cargo build --release --target aarch64-unknown-linux-gnu --no-default-features --features="pulseaudio-backend"

FROM debian:bookworm-slim

RUN dpkg --add-architecture arm64 \
 && apt-get update \
 && apt-get install -y --no-install-recommends \
      ca-certificates \
      libpulse0:arm64 \
      libasound2:arm64 \
      libssl3:arm64 \
 && rm -rf /var/lib/apt/lists/*

COPY --from=builder /src/target/aarch64-unknown-linux-gnu/release/librespot /usr/local/bin/librespot

# Cache dir for Spotify credentials
VOLUME ["/var/cache/librespot"]

# PulseAudio bridge is at localhost:4713 (audio-bridge)
ENV PULSE_SERVER=tcp:127.0.0.1:4713

CMD ["librespot", \
     "--name", "Klubhaus", \
     "--backend", "pulseaudio", \
     "--device", "alsa_output.default", \
     "--bitrate", "320", \
     "--enable-audio-cache", \
     "--cache", "/var/cache/librespot"]