import db from "../utils/db";

export default {
	createTalbe() {
		return db.executeSql(`
			CREATE TABLE IF NOT EXISTS groupUserList (
				create_time TEXT,
				delete_time TEXT,
				group_id INTEGER,
				id INTEGER,
				invite_id INTEGER,
				is_notice INTEGER,
				is_top INTEGER,
				no_speak_time INTEGER,
				role INTEGER,
				status INTEGER,
				unread INTEGER,
				userInfo TEXT,
				user_id INTEGER
			)
		`)
	},
	
	async getList({group_id}) {
		try {
			if (typeof group_id === 'undefined' || group_id === null) {
				return [];
			}
			const res = await db.selectSql(`SELECT * FROM groupUserList WHERE group_id = ${group_id}`);
			return res;
		}catch (error) {
			console.error('查询失败:', error);
			return []; // 返回空数组表示查询失败
		}
	},
	
	// 批量插入/更新数据
	async batchInsertOrUpdate(groupData) {
		if (!Array.isArray(groupData)) {
			throw new Error('数据必须为数组格式');
		}
		if (groupData.length === 0) return true;
		
		const dbInstance = await db.createDatabase();
		try {
	
			// 开启事务
			await db.executeSql('BEGIN IMMEDIATE TRANSACTION');
			
			// 2. 批量查询现有数据（基于 id）
			const ids = groupData.map(item => item.group_id).filter(group_id => group_id != null);
			if (ids.length === 0) return true;
			const existingRecords = await db.selectSql(`SELECT * FROM groupUserList WHERE group_id = ${ids[0]}`);
			// console.log('1234',existingRecords.length,existingRecords);
			// 构建批量插入语句
			const insertPromises = groupData.map(async (item,index) => {
				// 字段值预处理
				const processedItem = {
					create_time: item.create_time || '',
					delete_time: JSON.stringify(item.delete_time) || '',
					group_id: Number(item.group_id) || '',
					id: Number(item.id) || '',
					invite_id: Number(item.invite_id) || '',
					is_notice: Number(item.is_notice) || '',
					is_top: item.is_top || '',
					no_speak_time: item.no_speak_time || '',
					role: Number(item.role) || '',
					status: Number(item.status) || '',
					unread: Number(item.unread) || '',
					userInfo: item.userInfo ? JSON.stringify(item.userInfo) : '{}',
					user_id: Number(item.user_id) || ''
				};
				
				// 数据完全一致时跳过
				const existingItem = existingRecords[index]
				// console.info('123',existingItem); 
				// console.info('1234',processedItem);
				// console.info(processedItem);
				if (existingItem && this.isDataSame(existingItem, processedItem)) {
					return Promise.reject(new Error('聊天信息数据已同步并且数据没有改变'));
				}else{
					await db.executeSql(`DELETE FROM groupUserList WHERE group_id = ${item.group_id}`);
					// 提取值数组（注意顺序要与SQL语句中的字段顺序一致）
					
					const values = [
						processedItem.create_time,
						processedItem.delete_time,
						processedItem.group_id,
						processedItem.id,
						processedItem.invite_id,
						processedItem.is_notice,
						processedItem.is_top,
						processedItem.no_speak_time,
						processedItem.role,
						processedItem.status,
						processedItem.unread,
						processedItem.userInfo,
						processedItem.user_id
					];
					let value_str = "'" + values.join("','") + "'"
						
					// 构建INSERT语句
					const sql = `
						INSERT OR REPLACE INTO groupUserList (
						  create_time, delete_time, group_id, id, invite_id, is_notice, is_top, no_speak_time,
						  role, status, unread, userInfo, user_id
						) VALUES (` + value_str + `)
					`;
					return db.executeSql(sql);
				}
			});
			await Promise.all(insertPromises);
			await db.executeSql('COMMIT');
			// console.log('数据同步成功，插入/更新', groupData.length, '条记录');
			return true;
		} catch (error) {
			await db.executeSql('ROLLBACK');
			console.error('数据同步失败:', error);
			throw new Error('数据同步失败: ' + error.message);
		}
	},
	
	// 新增数据比较方法
	isDataSame(existing, current) {
	    // 排除自增字段等不需要比较的字段（根据实际表结构调整）
	    const ignoreFields = ['id','create_time','unread']; // 如果id是自增主键需要排除
	    
	    return Object.keys(current).every(key => {
	        if (ignoreFields.includes(key)) return true;
	        
	        // 处理JSON字段特殊比较
	        if (key === 'userInfo' ) {
	            return JSON.stringify(existing[key]) === JSON.stringify(current[key]);
	        }
	        
	        // 处理null值情况
	        if (existing[key] === null && current[key] === null) return true;
	        if (existing[key] === null || current[key] === null) return false;
	        
			
	        // 处理数字类型（包括可能为空字符串的情况）
	        if (typeof current[key] === 'number') {
	            return Number(existing[key]) === current[key];
	        }
	        // 默认字符串比较
	        return String(existing[key]) === String(current[key]);
	    });
	}
}