using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Primitives;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DOAN.ServiceCore.Middleware
{
    public class UtcToLocalMiddleware
    {
        private readonly RequestDelegate _next;

        public UtcToLocalMiddleware(RequestDelegate next)
        {
            _next = next;
        }

        public async Task InvokeAsync(HttpContext context)
        {
            // 检查是否是GET请求
            if (HttpMethods.IsGet(context.Request.Method))
            {
                var query = context.Request.Query; // 获取查询参数集合
                var queryParams = new List<KeyValuePair<string, StringValues>>();

                foreach (var queryParameter in query)
                {
                    if(queryParameter.Value.Count()>0)
                    {
                        foreach (var value in queryParameter.Value)
                        {
                            if (DateTime.TryParse(value,
                                        CultureInfo.InvariantCulture,
                                        DateTimeStyles.AssumeUniversal,
                                        out DateTime utcDate))
                            {
                                // 转换为本地时间
                                var localTime = utcDate.ToLocalTime();

                                queryParams.Add(new KeyValuePair<string, StringValues>(queryParameter.Key, new StringValues(localTime.ToString("o"))));
                            }
                            else
                            {
                                // 如果不是时间格式，则保持原样添加
                                queryParams.Add(new KeyValuePair<string, StringValues>(queryParameter.Key, new StringValues(value)));
                            }

                        }

                    }
                       
                   
                }

                // 构建新的 QueryString
                var newQueryString = string.Join("&", queryParams.Select(kv => $"{kv.Key}={Uri.EscapeDataString(kv.Value)}"));
                context.Request.QueryString = new QueryString("?" + newQueryString);
            }

            // Call the next delegate/middleware in the pipeline
            await _next(context);
        }
    }


}