using System.Text;
using SqlSugar;

namespace DS.Module.SqlSugar;
/// <summary>
/// sqlsuagr差异帮助类
/// </summary>
public static class SqlSugarDiffUtil
{
    /// <summary>
    /// 比较两个数据对象的修改内容
    /// </summary>
    /// <param name="beforeData"></param>
    /// <param name="afterData"></param>
    /// <returns></returns>
    public static DiffLog GetDiff(List<DiffLogTableInfo> beforeData, List<DiffLogTableInfo> afterData)
    {
        string mianID = null;
        if (beforeData != null && beforeData.Count>0)
        {
            var keyCoulumn = beforeData[0].Columns.FirstOrDefault(p => p.IsPrimaryKey == true);
            if (keyCoulumn != null)
            {
                mianID = keyCoulumn.Value.ToString();
            }
        }
        else if (afterData != null && afterData.Count > 0)
        {
            var keyCoulumn = afterData[0].Columns.FirstOrDefault(p => p.IsPrimaryKey == true);
            if (keyCoulumn != null)
            {
                mianID = keyCoulumn.Value.ToString();
            }
        }
 
        StringBuilder sb = new StringBuilder();
        if (beforeData != null && afterData != null)
        {
            var befroeColumns = beforeData[0].Columns;
            var afterCloums = afterData[0].Columns;
            foreach (var item in befroeColumns)
            {
                if (IgnoreColumns.Contains(item.ColumnName))
                    continue;
                var afterItem = afterCloums.FirstOrDefault(p => p.ColumnName == item.ColumnName && !p.Value.Equals(item.Value));
                if (afterItem != null)
                {
                    sb.Append($"[字段:{item.ColumnDescription},修改前:{item.Value}，修改后:{afterItem.Value}]");
                }
            }
        }
 
        return new DiffLog { Id = mianID, DiffData = sb.ToString() };
    }
    public class DiffLog
    {
        /// <summary>
        /// 主键Id
        /// </summary>
        public string Id { get; set; }
        /// <summary>
        /// 差异数据
        /// </summary>
        public string DiffData { get; set; }
    }

    /// <summary>
    /// 忽略的字段
    /// </summary>
    private static readonly  List<string> IgnoreColumns = new List<string>()
    {
        "CreateTime",
        "CreateUserName",
        "CreateBy",
        "UpdateTime",
        "UpdateUserName",
        "UpdateBy",
        "DeleteTime",
        "DeleteUserName",
        "DeleteBy",
    };
}