#!/usr/bin/env bash
# Bambuddy launcher.
#
# Starts the FastAPI backend via uvicorn, mirroring the upstream Docker CMD
# (`uvicorn backend.app.main:app --loop asyncio`). PYTHONPATH points at the
# app root (@out@/share/bambuddy) which contains the `backend` package and
# the prebuilt `static/` frontend — the layout backend.app.core.config expects.
set -euo pipefail

# State locations. The NixOS module always sets these explicitly; the
# defaults keep a bare `bambuddy` invocation out of the read-only store.
export DATA_DIR="${DATA_DIR:-${XDG_DATA_HOME:-$HOME/.local/share}/bambuddy}"
export LOG_DIR="${LOG_DIR:-$DATA_DIR/logs}"
export HOME="${HOME:-$DATA_DIR}"
export MPLCONFIGDIR="${MPLCONFIGDIR:-$DATA_DIR/.cache/matplotlib}"

mkdir -p "$DATA_DIR" "$LOG_DIR" "$MPLCONFIGDIR"

export PYTHONPATH="@out@/share/bambuddy${PYTHONPATH:+:$PYTHONPATH}"

# `--loop asyncio` matches the upstream Dockerfile: uvloop has a TLS bug that
# can truncate VP FTP uploads. Override with UVICORN_LOOP=uvloop if desired.
exec "@pythonEnv@/bin/uvicorn" backend.app.main:app \
  --host "${HOST:-0.0.0.0}" \
  --port "${PORT:-8000}" \
  --loop "${UVICORN_LOOP:-asyncio}" \
  --timeout-graceful-shutdown "${UVICORN_TIMEOUT_GRACEFUL_SHUTDOWN:-5}" \
  "$@"