using Newtonsoft.Json;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Mail;
using System.Text;
using WebLib;

namespace 報到系統
{
    /// <summary>
    /// 三竹（MITAKE）簡訊服務提供者
    /// </summary>
    public class MITAKESMSProvider : BaseSMSProvider
    {
        private const string ApiBaseUrl = "https://message.mitake.com.tw";

        /// <summary>
        /// 驗證帳號密碼是否正確，回傳 token（如果驗證成功）或錯誤訊息（如果驗證失敗）
        /// </summary>
        /// <returns></returns>
        private static bool Authenticate(out string token)
        {
            token = string.Empty;

            var responseStr = PostJson(ApiBaseUrl + "/AuthorizationService/Token",
                new MITAKEAuthRequest()
            );
            var responseObj = JsonConvert.DeserializeObject<MITAKEAuthResponse>(responseStr);
            if (responseObj != null && !string.IsNullOrEmpty(responseObj.AccessToken))
            {
                token = responseObj.AccessToken;
                return true;
            }
            return false;
        }

        /// <summary>
        /// 發送簡訊到指定手機號碼
        /// </summary>
        public static bool SendMMS(MessageQueueItem message, out string failMessage)
        {
            failMessage = "";

            try
            {
                InitializeSecuritySettings();

                if (string.IsNullOrEmpty(message.Mobile))
                {
                    failMessage = "手機號碼不能為空";
                    return false;
                }

                if (string.IsNullOrEmpty(message.Content))
                {
                    failMessage = "簡訊內容不能為空";
                    return false;
                }

                if (!Authenticate(out string token))
                {
                    failMessage = "驗證失敗，無法取得存取權杖";
                    return false;
                }

                // 組裝簡訊發送請求
                var smsRequest = new MITAKESMSRequest
                {
                    Subject = message.Subject,
                    Content = message.Content,
                };
                smsRequest.Destinations.Add(new MITAKEDestination { To = message.Mobile });
                smsRequest.Attachments.Add(new MITAKEAttachment
                {
                    AttachType = "png",
                    AttachName = string.Format("attach_{0}.png", message.ID),
                    AttachContent = message.QRCode
                });

                // 組裝 HTTP 標頭
                var smsHeaders = new Dictionary<string, string>
                {
                    { "authorization", "bearer " + token },
                    { "content-type", "application/json" },
                    { "clientID", message.MMSAccount },
                    { "actionType", "push" }
                };

                // 發送簡訊請求
                var smsResponseStr = PostJson(ApiBaseUrl + "/msg/mms/json", smsRequest, smsHeaders, 120);
                var smsResponseObj = JsonConvert.DeserializeObject<MITAKESMSResponse>(smsResponseStr);

                // 檢查回應結果
                if (smsResponseObj == null)
                {
                    return false;
                }

                if (smsResponseObj.Messages == null || smsResponseObj.Messages.Count == 0)
                {
                    string responsePreview = smsResponseStr.Length > 400 ? smsResponseStr.Substring(0, 400) : smsResponseStr;
                    failMessage = $"簡訊發送失敗，未收到有效回應：({responsePreview})";
                    return false;
                }

                var firstMessage = smsResponseObj.Messages[0];
                if (firstMessage.Status != "0" && firstMessage.Status != "1" && firstMessage.Status != "2")
                {
                    failMessage = $"簡訊發送失敗，狀態碼：{firstMessage.Status}，說明：{firstMessage.StatusDesc}";
                    return false;
                }

                return true;
            }
            catch (Exception ex)
            {
                failMessage = ex.Message;
                return false;
            }
        }

        /// <summary>
        /// 查詢帳號餘額
        /// </summary>
        //public static bool CheckBalance(out int balance, out string errorMessage)
        //{
        //    balance = 0;
        //    errorMessage = "";

        //    try
        //    {
        //        InitializeSecuritySettings();

        //        // TODO: 實作三竹查詢餘額邏輯
        //        // GET {ApiBaseUrl}/SmQueryGet.asp
        //        //   ?username={account}
        //        //   &password={password}
        //        //   &CharsetURL=UTF-8
        //        //
        //        // 回傳格式：AccountPoint=100

        //        throw new NotImplementedException("三竹查詢餘額尚未實作");
        //    }
        //    catch (NotImplementedException)
        //    {
        //        errorMessage = "三竹查詢餘額尚未實作";
        //        return false;
        //    }
        //    catch (Exception ex)
        //    {
        //        errorMessage = ex.Message;
        //        return false;
        //    }
        //}
    }

    /// <summary>
    /// 三竹簡訊授權請求
    /// </summary>
    public class MITAKEAuthRequest
    {
        [JsonProperty("clientID")]
        public string ClientID { get; set; }

        [JsonProperty("clientSecret")]
        public string ClientSecret { get; set; }

        public MITAKEAuthRequest()
        {
            ClientID = string.Empty;
            ClientSecret = string.Empty;

            using (var conn = DAC.NewConnection())
            {
                var dac = new DAC_MMSPlatform(conn);
                MMSPlatformItem item = dac.SelectByCode(PublicVariable.CurrentMMSPlatform);

                if (item != null)
                {
                    ClientID = item.Account;
                    ClientSecret = item.Password;
                }
            }
        }
    }

    /// <summary>
    /// 三竹簡訊授權回應
    /// </summary>
    public class MITAKEAuthResponse
    {
        [JsonProperty("accessToken")]
        public string AccessToken { get; set; }

        [JsonProperty("expiresIn")]
        public int ExpiresIn { get; set; }

        [JsonProperty("tokenType")]
        public string TokenType { get; set; }
    }

    /// <summary>
    /// 三竹簡訊接收者
    /// </summary>
    public class MITAKEDestination
    {
        [JsonProperty("to")]
        public string To { get; set; }

        [JsonProperty("cID")]
        public string CID { get; set; }

        public MITAKEDestination()
        {
            CID = Guid.NewGuid().ToString().Replace("-", "");
        }
    }

    /// <summary>
    /// 三竹簡訊附件
    /// </summary>
    public class MITAKEAttachment
    {
        [JsonProperty("attachContent")]
        public string AttachContent { get; set; }

        [JsonProperty("attachType")]
        public string AttachType { get; set; }

        [JsonProperty("attachName")]
        public string AttachName { get; set; }
    }

    /// <summary>
    /// 三竹簡訊發送請求
    /// </summary>
    public class MITAKESMSRequest
    {
        [JsonProperty("subject")]
        public string Subject { get; set; }

        [JsonProperty("content")]
        public string Content { get; set; }

        [JsonProperty("orderTime")]
        public string OrderTime { get; set; }

        [JsonProperty("expireTime")]
        public string ExpireTime { get; set; }

        [JsonProperty("destinations")]
        public List<MITAKEDestination> Destinations { get; set; }

        [JsonProperty("attachments")]
        public List<MITAKEAttachment> Attachments { get; set; }


        public MITAKESMSRequest()
        {
            Subject = string.Empty;
            Content = string.Empty;
            OrderTime = PublicVariable.TaiwanNow.ToString("yyyyMMddHHmmss");
            ExpireTime = PublicVariable.TaiwanNow.AddDays(1).ToString("yyyyMMddHHmmss");
            Destinations = new List<MITAKEDestination>();
            Attachments = new List<MITAKEAttachment>();
        }
    }

    /// <summary>
    /// 三竹簡訊發送回應項目
    /// </summary>
    public class MITAKESMSResponseItem
    {
        [JsonProperty("msgID")]
        public string MsgID { get; set; }

        [JsonProperty("cID")]
        public string CID { get; set; }

        [JsonProperty("status")]
        public string Status { get; set; }

        [JsonProperty("statusDesc")]
        public string StatusDesc { get; set; }

        [JsonProperty("statusTime")]
        public string StatusTime { get; set; }

        [JsonProperty("point")]
        public string Point { get; set; }
    }

    /// <summary>
    /// 三竹簡訊發送回應
    /// </summary>
    public class MITAKESMSResponse
    {
        [JsonProperty("batchID")]
        public string BatchID { get; set; }

        [JsonProperty("messages")]
        public List<MITAKESMSResponseItem> Messages { get; set; }

        [JsonProperty("costPoints")]
        public string CostPoints { get; set; }
    }
}