using DG.Redis;
using Microsoft.EntityFrameworkCore.Query.Internal;
using Zxd.Core.Domain.Dto.Zxd.Callback;
using Zxd.Core.Shared.Helpers;

namespace Zxd.Core.WebApi.Controllers
{
    /// <summary>
    /// 回调管理
    /// </summary>
    [ApiSignatureFilterForbid]
    public class CallbackController : BaseController
    {
        private readonly IRedisManager _redisManager;

        private readonly IOrderDomain _orderDomain;

        private readonly PayCallbackConfig _payCallbackConfig;

        /// <summary>
        /// 
        /// </summary>
        /// <param name="redisManager"></param>
        /// <param name="orderDomain"></param>
        /// <param name="configuration"></param>
        public CallbackController(
            IRedisManager redisManager,
            IOrderDomain orderDomain,
            IConfiguration configuration)
        {
            _redisManager = redisManager;
            _orderDomain = orderDomain;
            _payCallbackConfig = configuration.GetSection("PayCallbackConfig").Get<PayCallbackConfig>();
        }

        /// <summary>
        /// 支付回调
        /// </summary>
        /// <param name="dto"></param>
        /// <returns></returns>
        [HttpPost("Pay")]
        [ApiResultFilterForbid]
        public async Task<string> Pay(Dictionary<string, object> dto)
        {
            var authorization = default(string);
            var timestamps = default(string);
            var json = default(string);
            var success = false;
            try
            {
                authorization = Request.Headers["authorization"].FirstOrDefault();
                if (string.IsNullOrEmpty(authorization))
                {
                    throw new ApiException("authorization必填", 1);
                }
                var parts = authorization.Split(':');
                if (parts.Length != 2)
                {
                    throw new ApiException("authorization无效", 1);
                }
                var user = parts[0];
                var sign = parts[1];
                //var secret = await _redisManager.GetAsync<string>($"ZxdCore:Secret:{user}");
                var secret = _payCallbackConfig.Secret;
                if (string.IsNullOrEmpty(secret))
                {
                    throw new ApiException("还未配置secret", 999);
                }

                timestamps = Request.Headers["timestamps"].FirstOrDefault();
                if (string.IsNullOrEmpty(timestamps))
                {
                    throw new ApiException("timestamps必填", 1);
                }
                json = GetSortedJson(dto);

                Log.Information($"Callback,{authorization},{timestamps},{json}");

                var args = new List<string> { user, json, secret, timestamps };
                args.Sort(new ASCIIComparer());
                var input = string.Join("", args);
                var signData = Shared.Helpers.SecurityHelper.GetMD5String(input);
                if (signData != sign)
                {
                    throw new ApiException("签名不正确", 2);
                }

                var req = Dict2Model<BindOrderDto>(dto);
                var invalids = ValidationHelper.Validate2<BindOrderDto>(req);
                if (!string.IsNullOrEmpty(invalids))
                {
                    throw new ApiException(invalids, 1);
                }

                await _orderDomain.BindAsync(req);
                success = true;
            }
            catch (Exception ex)
            {
                Log.Information($"CallbackError,{authorization},{timestamps},{json},{ex}");
            }
            return success ? "支付回调成功" : "支付回调失败";
        }

        private string GetSortedJson(Dictionary<string, object> dto)
        {
            var items = new List<string>();
            foreach (var p in dto.Keys)
            {
                items.Add(p);
            }

            items.Sort(new ASCIIComparer());
            var dict = new Dictionary<string, object>();
            foreach (var item in items)
            {
                var val = dto[item];
                if (val!=null && val.ToString().Length>0)
                {
                    dict[item]=val;
                }
            }

            return JsonSerializer.Serialize(dict);
        }

        private T Dict2Model<T>(Dictionary<string, object> dict) where T : class, new()
        {
            var one = new T();
            var t = typeof(T);
            var ps = t.GetProperties();
            foreach (var p in ps)
            {
                if (dict.ContainsKey(p.Name))
                {
                    var val = dict[p.Name];
                    if (val != null)
                    {
                        var val_real = ConvertHelper.GetVal(p.PropertyType, val.ToString());
                        p.SetValue(one, val_real, null);
                    }
                }
            }
            return one;
        }
    }

    public class ASCIIComparer : IComparer<string>
    {
        public int Compare(string x, string y)
        {
            var len = x.Length > y.Length ? y.Length : x.Length;
            for (var i = 0; i < len; i++)
            {
                if (x[i] < y[i])
                {
                    return -1;
                }

                if (x[i] > y[i])
                {
                    return 1;
                }
            }

            return 0;
        }
    }
}