namespace Admin.NET.Core.Service;

/// <summary>
/// 常量下拉框服务
/// </summary>
[ApiDescriptionSettings(Name = "常量下拉框服务", Order = 193)]
public class ConstSelectorService : IDynamicApiController, ITransient
{

    private readonly IDistributedCache _cache;
    public ConstSelectorService(IDistributedCache cache)
    {
        _cache = cache;
    }

    /// <summary>
    /// 获取所有常量下拉框列表
    /// </summary>
    /// <returns></returns>
    [HttpGet("/constSelector/allConstSelector")]
    public async Task<dynamic> GetAllConstSelector()
    {
        var key = $"{CacheConst.KeyConstSelector}AllSelector";
        var json = await _cache.GetStringAsync(key);
        if (!string.IsNullOrWhiteSpace(json))
        {
            return json.ToObject<List<SelectorDto>>();
        }
        var typeList = await GetAllTypesAsync();
        var selectData = typeList.Select(x => new SelectorDto
        {
            Name = x.CustomAttributes.ToList().FirstOrDefault()?.ConstructorArguments.ToList().FirstOrDefault().Value?.ToString() ?? x.Name,
            Code = x.Name
        }).ToList();
        await _cache.SetStringAsync(key, selectData.ToJson());
        return selectData;
    }

    /// <summary>
    /// 根据类名获取下拉框数据
    /// </summary>
    /// <param name="typeName"></param>
    /// <returns></returns>
    [HttpGet("/constSelector/constSelector")]
    public async Task<dynamic> GetConstSelector(string typeName)
    {
        var key = $"{CacheConst.KeyConstSelector}{typeName.ToUpper()}";
        var json = await _cache.GetStringAsync(key);
        if (!string.IsNullOrWhiteSpace(json))
        {
            return json.ToObject<List<SelectorDto>>();
        }
        var typeList = await GetAllTypesAsync();
        var type = typeList.FirstOrDefault(x => x.Name == typeName);

        var isEnum = type.BaseType.Name == "Enum";
        var selectData = type.GetFields()?
            .Where(isEnum, x => x.FieldType.Name == typeName)
            .Select(x => new SelectorDto
            {
                Name = x.Name,
                Code = isEnum ? (int)x.GetValue(BindingFlags.Instance) : x.GetValue(BindingFlags.Instance)
            }).ToList();
        await _cache.SetStringAsync(key, selectData.ToJson());
        return selectData;
    }

    /// <summary>
    /// 获取所有常量
    /// </summary>
    /// <returns></returns>
    private async Task<List<Type>> GetAllTypesAsync()
    {
        return await Task.Run(() =>
      {
          var typeList = AppDomain.CurrentDomain.GetAssemblies()
         .SelectMany(x => x.GetTypes())
         .Where(x => x.CustomAttributes.Any(y => y.AttributeType == typeof(EnumSelectorAttribute)))
         .ToList();
          return typeList;
      });
    }
}