import {useCallback, useEffect, useRef} from 'react';
import {View} from 'react-native';

export interface ViewRect {
  x: number;
  y: number;
  width: number;
  height: number;
  timestamp: number;
}

export function useViewProbe() {
  const ref = useRef<View>(null);
  const pending = useRef(new Map<ReturnType<typeof setTimeout>, (reason: Error) => void>());
  useEffect(() => () => {
    pending.current.forEach((reject, timer) => {
      clearTimeout(timer);
      reject(new Error('测量页面已卸载'));
    });
    pending.current.clear();
  }, []);
  const measure = useCallback(() => new Promise<ViewRect>((resolve, reject) => {
    if (!ref.current) {
      reject(new Error('测量节点尚未挂载，请先打开面板'));
      return;
    }
    const timer = setTimeout(() => {
      pending.current.delete(timer);
      reject(new Error('measureInWindow 超时，未得到布局数据'));
    }, 1500);
    pending.current.set(timer, reject);
    ref.current.measureInWindow((x, y, width, height) => {
      if (!pending.current.has(timer)) return;
      clearTimeout(timer);
      pending.current.delete(timer);
      if (![x, y, width, height].every(Number.isFinite) || width <= 0 || height <= 0) {
        reject(new Error('measureInWindow 返回无效尺寸'));
        return;
      }
      resolve({x, y, width, height, timestamp: Date.now()});
    });
  }), []);
  return {ref, measure};
}