using Microsoft.Extensions.DependencyModel;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using System.Threading.Tasks;
using ZhonTai.Admin.Core.Attributes;
using ZhonTai.Admin.Core.Configs;
using ZhonTai.Admin.Core.Dto;
using ZhonTai.DynamicApi;
using ZhonTai.DynamicApi.Attributes;
using ZhonTai.Admin.Core.Consts;

namespace ZhonTai.Admin.Services.Cache;

/// <summary>
/// 缓存服务
/// </summary>
[DynamicApi(Area = AdminConsts.AreaName)]
public class CacheService : BaseService, ICacheService, IDynamicApi
{
    public CacheService()
    {
    }

    /// <summary>
    /// 查询列表
    /// </summary>
    /// <returns></returns>
    public IResultOutput GetList()
    {
        var list = new List<object>();

        var appConfig = LazyGetRequiredService<AppConfig>();
        Assembly[] assemblies = DependencyContext.Default.RuntimeLibraries
            .Where(a => appConfig.AssemblyNames.Contains(a.Name) || a.Name == "ZhonTai.Admin")
            .Select(o => Assembly.Load(new AssemblyName(o.Name))).ToArray();

        foreach (Assembly assembly in assemblies)
        {
            var types = assembly.GetExportedTypes().Where(a => a.GetCustomAttribute<ScanCacheKeysAttribute>() != null);
            foreach (Type type in types)
            {
                var fields = type.GetFields(BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy);
                foreach (FieldInfo field in fields)
                {
                    var descriptionAttribute = field.GetCustomAttributes(typeof(DescriptionAttribute), false).FirstOrDefault() as DescriptionAttribute;

                    list.Add(new
                    {
                        field.Name,
                        Value = field.GetRawConstantValue().ToString(),
                        descriptionAttribute?.Description
                    });
                }
            }
        }

        return ResultOutput.Ok(list);
    }

    /// <summary>
    /// 清除缓存
    /// </summary>
    /// <param name="cacheKey">缓存键</param>
    /// <returns></returns>
    public async Task<IResultOutput> ClearAsync(string cacheKey)
    {
        Logger.LogWarning($"{User.Id}.{User.UserName}清除缓存[{cacheKey}]");
        await Cache.DelByPatternAsync(cacheKey);
        return ResultOutput.Ok();
    }
}