#!/usr/bin/env bash
# OCR Worker 共用函数：同机 GPU 识别 + screen 常驻
OCR_SCREEN_NAME="${OCR_SCREEN_NAME:-ocr-worker}"
OCR_PORT="${OCR_PORT:-23567}"

ocr_worker_dir() {
  echo "${INSTALL_DIR}/deploy/ocr-worker"
}

install_ocr_worker() {
  local worker_dir
  worker_dir="$(ocr_worker_dir)"
  if [[ ! -d "${worker_dir}" ]]; then
    log_error "未找到 ${worker_dir}"
    return 1
  fi
  log_info "安装/更新 OCR Worker (PaddleOCR GPU)…"
  chmod +x "${worker_dir}"/*.sh 2>/dev/null || true
  OCR_PORT="${OCR_PORT}" bash "${worker_dir}/install.sh"
}

ocr_screen_running() {
  screen -list 2>/dev/null | grep -q "\.${OCR_SCREEN_NAME}[[:space:]]"
}

start_ocr_screen() {
  local worker_dir
  worker_dir="$(ocr_worker_dir)"
  if [[ ! -x "${worker_dir}/.venv/bin/uvicorn" ]]; then
    log_warn "OCR Worker 未安装，跳过 screen 启动"
    return 1
  fi
  if ! command -v screen >/dev/null; then
    log_error "未安装 screen，请 apt install screen"
    return 1
  fi

  log_info "启动 OCR Worker → screen 会话「${OCR_SCREEN_NAME}」(GPU 常驻, 端口 ${OCR_PORT})"
  if ocr_screen_running; then
    screen -S "${OCR_SCREEN_NAME}" -X quit 2>/dev/null || true
    sleep 1
  fi

  screen -dmS "${OCR_SCREEN_NAME}" bash -lc "
    cd '${worker_dir}' &&
    export OCR_USE_GPU=true OCR_PORT='${OCR_PORT}' OCR_HOST=0.0.0.0 &&
    exec bash run.sh
  "
  sleep 1
}

stop_ocr_screen() {
  if ocr_screen_running; then
    log_info "停止 OCR screen 会话…"
    screen -S "${OCR_SCREEN_NAME}" -X quit 2>/dev/null || true
  fi
}

wait_ocr_healthy() {
  local i
  for i in $(seq 1 90); do
    if curl -sf "http://127.0.0.1:${OCR_PORT}/health" >/dev/null 2>&1; then
      log_info "OCR 健康检查通过 — http://127.0.0.1:${OCR_PORT}/health"
      return 0
    fi
    sleep 2
  done
  log_warn "OCR 尚未就绪（模型加载可能需 1–3 分钟）"
  log_warn "查看: bash ${INSTALL_DIR}/deploy/ocr-screen.sh status"
  return 1
}

show_ocr_status() {
  echo ""
  echo "--- OCR Worker (screen: ${OCR_SCREEN_NAME}) ---"
  if ocr_screen_running; then
    echo "screen: 运行中"
    screen -list 2>/dev/null | grep "${OCR_SCREEN_NAME}" || true
  else
    echo "screen: 未运行"
  fi
  if curl -sf "http://127.0.0.1:${OCR_PORT}/health" 2>/dev/null; then
    echo ""
  else
    echo "health: 无响应 (http://127.0.0.1:${OCR_PORT}/health)"
  fi
  if command -v nvidia-smi >/dev/null; then
    nvidia-smi --query-gpu=name,memory.used,memory.total,utilization.gpu --format=csv,noheader 2>/dev/null || true
  fi
}