using Backend.Models;
using BackendWorkerService.Services.Interface;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
using System.Xml;

namespace BackendWorkerService.Services.Implement
{
    class SendSMSService : ISendSMSService
    {
        private readonly ILogger<SendSMSService> logger;
        private readonly IOptions<SMSConfig> _options;

        private SMSConfig sms;

        public SendSMSService(ILogger<SendSMSService> logger, IOptions<SMSConfig> options)
        {
            this.logger = logger;
            sms = options.Value;
            sms.Encoded = Convert.ToBase64String(Encoding.GetEncoding("ISO-8859-1").GetBytes(sms.UserName + ":" + sms.Password));
        }

        public bool Send(int id, string phone, string content)
        {
            try
            {
                logger.LogError("【SendSMSService】【SMS開始寄送】[任務編號]：{0}", id);
                //設定傳送的Request
                HttpWebRequest Postrequest = (HttpWebRequest)WebRequest.Create(sms.Api);
                Postrequest.Method = "POST";
                Postrequest.Headers.Add("Authorization", "Basic " + sms.Encoded);
                Postrequest.PreAuthenticate = true;
                using (var streamWriter = new StreamWriter(Postrequest.GetRequestStream()))
                {
                    string json = string.Format("<real val=\"{0},{1}\"/>", phone, content);

                    streamWriter.Write(json);
                }

                //設定回傳的Request
                HttpWebResponse response = (HttpWebResponse)Postrequest.GetResponse();
                var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.LoadXml(responseString);
                string jsonText = JsonConvert.SerializeXmlNode(xmlDoc);
                JObject resultVal = (JObject)JsonConvert.DeserializeObject(jsonText);

                if (resultVal.ContainsKey("obj"))
                {
                    var display_split = resultVal["obj"]["@display"].ToString().Split(' ');
                    var responseStatus = display_split[display_split.Length - 1];

                    if (responseStatus == "{ok}")
                    {
                        logger.LogInformation("【SendSMSService】【SMS寄送成功】[任務編號]：{0}", id);
                        return true;
                    }
                }
                else
                {
                    logger.LogError("【SendSMSService】【SMS寄送失敗】[任務編號]：{0}", id);
                    logger.LogError("【SendSMSService】【SMS寄送失敗】[失敗內容]：{0}", resultVal);
                    return false;
                }

                return false;
            }
            catch (Exception exception)
            {
                logger.LogError("【SendSMSService】【SMS寄送失敗】[任務編號]：{0}", id);
                logger.LogError("【SendSMSService】【SMS寄送失敗】[Exception]：{0}", exception.ToString());
                throw;
                //return false;
            }
        }
    }
}