#!/bin/bash
# entrypoint.sh — seed first-run instance state into the config volume, then
# start the app. The image itself is code-only and stateless/rebuildable;
# everything mutable lives under $ALEMBIC_CONFIG_DIR (see docs/ARCHITECTURE.md).
set -euo pipefail

ALEMBIC_CONFIG_DIR="${ALEMBIC_CONFIG_DIR:-/config}"
PIPELINE_DIR="${PIPELINE_DIR:-/app/pipeline}"

# The container runs as uid 1000. If the mounted config folder is owned by
# root on the host (the usual result of `mkdir` as your normal user), the
# first write fails and the container would otherwise exit with a bare
# "Permission denied". Catch that here and say exactly how to fix it.
if ! mkdir -p \
  "$ALEMBIC_CONFIG_DIR/beets/data" \
  "$ALEMBIC_CONFIG_DIR/pipeline" \
  "$ALEMBIC_CONFIG_DIR/logs" 2>/dev/null; then
  echo "[entrypoint] ERROR: cannot write to $ALEMBIC_CONFIG_DIR" >&2
  echo "[entrypoint] The container runs as uid 1000 but that folder is not writable by it." >&2
  echo "[entrypoint] On the host, run: chown -R 1000:1000 <the folder mounted at /config>" >&2
  exit 1
fi

seed_if_absent() {
  local src="$1" dst="$2"
  if [[ ! -f "$dst" ]]; then
    cp "$src" "$dst"
    echo "[entrypoint] seeded $dst from $(basename "$src")"
  fi
}

seed_if_absent "$PIPELINE_DIR/beets/config.yaml.example" "$ALEMBIC_CONFIG_DIR/beets/config.yaml"
seed_if_absent "$PIPELINE_DIR/configs/artist-canonical.list.example" "$ALEMBIC_CONFIG_DIR/pipeline/artist-canonical.list"
seed_if_absent "$PIPELINE_DIR/configs/djmix-albums.txt.example" "$ALEMBIC_CONFIG_DIR/pipeline/djmix-albums.txt"
seed_if_absent "$PIPELINE_DIR/configs/genres-whitelist.txt.example" "$ALEMBIC_CONFIG_DIR/pipeline/genres-whitelist.txt"
seed_if_absent "$PIPELINE_DIR/configs/cross-album-keep.list.example" "$ALEMBIC_CONFIG_DIR/pipeline/cross-album-keep.list"

export BEETSDIR="$ALEMBIC_CONFIG_DIR/beets"

exec uvicorn app.main:app --host 0.0.0.0 --port "${ALEMBIC_PORT:-8420}"