using System;
using Dpz.Core.Infrastructure.ExpressTreeQuery.ComparisonStrategy;

namespace Dpz.Core.Infrastructure.ExpressTreeQuery;

[AttributeUsage(AttributeTargets.Property, AllowMultiple = true)]
public class QueryFilterAttribute : Attribute
{
    /// <summary>
    /// 
    /// </summary>
    /// <param name="condition">请求参数需要达成的条件</param>
    public QueryFilterAttribute(FilterCondition condition)
    {
        Condition = condition;
        
        // if (!typeof(IComparisonStrategy).IsAssignableFrom(comparisonStrategyType))
        // {
        //     throw new ArgumentException($"{comparisonStrategyType.Name} must implement IComparisonStrategy");
        // }
        //
        // ComparisonStrategy = (IComparisonStrategy)Activator.CreateInstance(comparisonStrategyType)!;
    }

    /// <summary>
    /// 请求参数需要达成的条件
    /// </summary>
    public FilterCondition Condition { get; }

    /// <summary>
    /// <code>Condition == FilterCondition.EqualValue</code>
    /// 需达成条件的比较值
    /// </summary>
    public object? ConditionValue { get; set; }

    /// <summary>
    /// 比较方式
    /// 默认为 Equal
    /// </summary>
    public Comparison Comparison { get; set; } = Comparison.Equal;

    /// <summary>
    /// 需要比较的字段名称
    /// 默认为 Null
    /// 为 Null 时，获取与该属性相同的属性名称
    /// </summary>
    public string? PropertyName { get; set; }

    /// <summary>
    /// 需要比较字段的值
    /// 默认为 string "10001"
    /// 值为 "10001" 时，会忽略 PropertyValue 值
    /// </summary>
    public object? PropertyValue { get; set; } = GenerateConditionFilter.DefaultPropertyValue;

    /// <summary>
    /// 筛选结束时间 是否 +1 天
    /// </summary>
    public bool EndAddDay { get; set; }
    
    /// <summary>
    /// 是否筛选一天内的时间
    /// 只支持 <see cref="DateTime"/> 类型
    /// </summary>
    public bool FilterInDay { get; set; }

    /// <summary>
    /// 实体类型
    /// </summary>
    public Type? EntityType { get; set; }

    // /// <summary>
    // /// 比较策略类型
    // /// </summary>
    // public Type ComparisonStrategyType { get; set; }
}