function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
function _iterableToArrayLimit(r, l) { var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (null != t) { var e, n, i, u, a = [], f = !0, o = !1; try { if (i = (t = t.call(r)).next, 0 === l) { if (Object(t) !== t) return; f = !1; } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0); } catch (r) { o = !0, n = r; } finally { try { if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return; } finally { if (o) throw n; } } return a; } }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
import { useState, useEffect, useRef } from 'react';

/**
 * 图片加载状态管理 Hook
 * @param src - 图片地址
 * @param lazy - 是否启用懒加载
 * @returns 加载状态对象
 */
export var useImageLoad = function useImageLoad(src, lazy) {
  var _useState = useState(!!src),
    _useState2 = _slicedToArray(_useState, 2),
    loading = _useState2[0],
    setLoading = _useState2[1];
  var _useState3 = useState(false),
    _useState4 = _slicedToArray(_useState3, 2),
    error = _useState4[0],
    setError = _useState4[1];
  var imgRef = useRef(null);
  var observerRef = useRef(null);
  useEffect(function () {
    // 如果没有图片地址，直接设置为非加载状态
    if (!src) {
      setLoading(false);
      setError(false);
      return;
    }

    // 重置状态
    setLoading(true);
    setError(false);

    // 如果启用懒加载且浏览器支持 IntersectionObserver
    if (lazy && 'IntersectionObserver' in window && imgRef.current) {
      observerRef.current = new IntersectionObserver(function (entries) {
        entries.forEach(function (entry) {
          if (entry.isIntersecting) {
            var _observerRef$current;
            loadImage();
            // 加载后断开观察
            (_observerRef$current = observerRef.current) === null || _observerRef$current === void 0 || _observerRef$current.disconnect();
          }
        });
      }, {
        rootMargin: '50px' // 提前 50px 开始加载
      });
      observerRef.current.observe(imgRef.current);
      return function () {
        var _observerRef$current2;
        (_observerRef$current2 = observerRef.current) === null || _observerRef$current2 === void 0 || _observerRef$current2.disconnect();
      };
    } else {
      // 不使用懒加载，直接加载
      loadImage();
    }

    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [src, lazy]);

  /**
   * 加载图片
   */
  var loadImage = function loadImage() {
    if (!src) return;
    var img = new Image();
    img.src = src;
    img.onload = function () {
      setLoading(false);
      setError(false);
    };
    img.onerror = function () {
      setLoading(false);
      setError(true);
    };
  };
  return {
    loading: loading,
    error: error,
    imgRef: imgRef
  };
};