using LFlow.Base.Interfaces;

namespace LFlow.Base.Utils;

public static class ObjectToWhereExp
{
    /// <summary>
    /// 将IModel对象转换为where条件
    /// </summary>
    /// <param name="model"></param>
    /// <returns></returns>
    public static string ToWhereExp(this IModel model)
    {
        var type = model.GetType();
        var properties = type.GetProperties();
        var whereExp = "  1=1 ";
        foreach (var property in properties)
        {
            var value = property.GetValue(model);
            if (value == null) continue;
            if (property.PropertyType == typeof(string))
            {
                whereExp += $" and {property.Name} like '%{value}%'";
            }
            else if (property.PropertyType == typeof(DateTime) && value is DateTime dateTime)
            {
                if (dateTime != default(DateTime))
                {
                    whereExp += $" and {property.Name} like '%{value}%'";
                }
            }
            else if (property.PropertyType.IsEnum)
            {
                var enumValue = (int)value;
                whereExp += $" and {property.Name} = '{enumValue}'";
            }
            else if (property.PropertyType == typeof(bool) && value is bool flag)
            {
                if (flag)
                {
                    whereExp += $" and {property.Name} = 1";
                }
                else
                {
                    whereExp += $" and {property.Name} = 0";
                }
            }
            else if (value != null)
            {
                whereExp += $" and {property.Name} = '{value}'";
            }
        }
        return whereExp;
    }
}