#!/bin/sh
# Nexus Docker entrypoint — wait for deps, sync .env with persistent volume, exec uvicorn.
set -eu

PERSIST_DIR="${NEXUS_PERSIST_DIR:-/var/lib/nexus}"
PERSIST_ENV="${PERSIST_DIR}/.env"

wait_tcp() {
  host="$1"
  port="$2"
  echo "entrypoint: waiting for ${host}:${port}..."
  until python3 -c "
import socket
s = socket.socket()
s.settimeout(2)
s.connect(('${host}', ${port}))
s.close()
" 2>/dev/null; do
    sleep 2
  done
}

wait_tcp_optional() {
  host="$1"
  port="$2"
  tries="${3:-15}"
  echo "entrypoint: waiting for external Redis ${host}:${port} (max ${tries} tries)..."
  n=0
  while [ "$n" -lt "$tries" ]; do
    if python3 -c "
import socket
s = socket.socket()
s.settimeout(2)
s.connect(('${host}', ${port}))
s.close()
" 2>/dev/null; then
      echo "entrypoint: Redis ready at ${host}:${port}"
      return 0
    fi
    n=$((n + 1))
    sleep 2
  done
  echo "entrypoint: warn — Redis not reachable at ${host}:${port}; install on host or set NEXUS_REDIS_URL"
  return 0
}

restore_persisted_env() {
  if [ -f "${PERSIST_ENV}" ]; then
    cp "${PERSIST_ENV}" /app/.env
    chmod 600 /app/.env
    echo "entrypoint: restored .env from ${PERSIST_ENV}"
  fi
}

write_env_from_environment() {
  if [ -f /app/.env ]; then
    return 0
  fi
  if [ "${NEXUS_DOCKER_WRITE_ENV:-}" != "1" ]; then
    return 0
  fi
  if [ -z "${NEXUS_SECRET_KEY:-}" ]; then
    return 0
  fi
  if [ "${NEXUS_INSTALL_WIZARD_PENDING:-}" = "1" ]; then
    echo "entrypoint: install wizard pending — skip writing /app/.env"
    return 0
  fi
  mkdir -p "${PERSIST_DIR}"
  {
    echo "# Generated by docker/entrypoint.sh — do not commit"
    env | grep '^NEXUS_' | sort
  } > /app/.env
  chmod 600 /app/.env
  cp /app/.env "${PERSIST_ENV}"
  echo "entrypoint: wrote .env from container environment"
}

persist_env_on_exit() {
  if [ -f /app/.env ]; then
    mkdir -p "${PERSIST_DIR}"
    cp /app/.env "${PERSIST_ENV}"
    chmod 600 "${PERSIST_ENV}" 2>/dev/null || true
  fi
}

trap persist_env_on_exit EXIT INT TERM

MYSQL_HOST="${MYSQL_HOST:-mysql}"
MYSQL_PORT="${MYSQL_PORT:-3306}"

wait_tcp "${MYSQL_HOST}" "${MYSQL_PORT}"

# Redis 由用户自行安装在宿主机/1Panel；安装向导阶段不阻塞启动
if [ "${NEXUS_INSTALL_WIZARD_PENDING:-0}" != "1" ] && [ "${NEXUS_SKIP_REDIS_WAIT:-0}" != "1" ]; then
  REDIS_HOST="${REDIS_HOST:-host.docker.internal}"
  REDIS_PORT="${REDIS_PORT:-6379}"
  wait_tcp_optional "${REDIS_HOST}" "${REDIS_PORT}" 15
fi

restore_persisted_env
write_env_from_environment

exec "$@"