const cacheManager = (function() {
	const STORAGE_PREFIX = 'App_cache_';
	function set(key, value) {
		const fullKey = STORAGE_PREFIX + key;
		if (typeof value === 'object' && value !== null) {
			// 如果是对象，则将其转换为字符串存储
			uni.setStorageSync(fullKey, JSON.stringify(value));
		} else {
			uni.setStorageSync(fullKey, value);
		}
	}

	// 获取缓存
	function get(key) {
		const fullKey = STORAGE_PREFIX + key;
		const value = uni.getStorageSync(fullKey);
		try {
			return JSON.parse(value);
		} catch (e) {
			return value;
		}
	}

	// 删除缓存
	function remove(key) {
		const fullKey = STORAGE_PREFIX + key;
		uni.removeStorageSync(fullKey);
	}

	//例子： cacheManager.updateObject('user', { www: undefined }); //删除
	function updateObject(key, updates) {
		let obj = get(key) || {};
		// 合并更新到对象中
		//Object.assign(obj, updates);
		 for (let [keyToUpdate, value] of Object.entries(updates)) {
		    if (value === null || value === undefined) {
		      // 如果值为 null 或 undefined，则删除属性
		      delete obj[keyToUpdate];
		    } else {
		      obj[keyToUpdate] = value;
		    }
		  }
		set(key, obj);
	}
	// 用于视频已经看完 修改状态
	function updateJieStatus(key, index,currentJieId) {
		let obj = get(key) || {};
		// console.log('obj',obj);
		// console.log('index',index);
		// console.log('currentJieId',currentJieId);
		for(let jie of obj.zhangList[index].jieList){
			if(jie.jieId ==currentJieId){
		//		console.log('jie',jie);
				jie.studyFlag = 1
				break
			}
		}
		set(key, obj);
	}
	// 获得当前jie参数
	function getCurrentJieData(key, index,currentJieId) {
		let obj = get(key) || {};
		// console.log('obj',obj);
		// console.log('index',index);
		// console.log('currentJieId',currentJieId);
		for(let jie of obj.zhangList[index].jieList){
			if(jie.jieId ==currentJieId){
				return jie
				break
			}
		}
	}
	function clearAll() {
		const keys = uni.getStorageInfoSync().keys;
		keys.forEach(key => {
			if (key.startsWith(STORAGE_PREFIX)) {
				uni.removeStorageSync(key);
			}
		});
	}

	// 增量修改对象中的数组，支持添加、更新和删除元素
	function updateArrayInObject(key, arrayPath, updateFn) {
		let obj = get(key) || {};

		// 根据arrayPath找到需要修改的数组
		const targetArray = findArrayInObject(obj, arrayPath);

		if (Array.isArray(targetArray)) {
			// 应用更新函数到目标数组上
			updateFn(targetArray);

			// 重新设置缓存
			set(key, obj);
		} else {
			console.error(`${arrayPath}不指向对象中的数组。`);
		}
	}
	//  例子
	// cacheManager.updateArrayInObject('user', 'hobbies', (hobbies) => {
	// 	hobbies.push('reading');
	// 	hobbies = 'coding';
	// 	hobbies.pop();
	// });
	// 在对象中根据路径找到数组
	function findArrayInObject(obj, path) {
		return path.split('.').reduce((acc, curr) => {
			if (acc && acc[curr] !== undefined) {
				return acc[curr];
			} else {
				return undefined;
			}
		}, obj);
	}
	return {
		set,
		get,
		remove,
		updateJieStatus,
		getCurrentJieData,
		updateObject,
		findArrayInObject,
		clearAll
	};
})();

export default cacheManager;

// 单元测试 引导大鹅提示 缓存Key
export const SHOW_UNIT_TEST_TISHI = 'SHOW_UNIT_TEST_TISHI';

// 单元测试大鹅提示缓存
export function useUnitTestTishi() {
	return {
		updateTishi:() => cacheManager.set(SHOW_UNIT_TEST_TISHI,'has'),
		getTishi: () => cacheManager.get(SHOW_UNIT_TEST_TISHI)
	}
}