using Newtonsoft.Json;
using Newtonsoft.Json.Serialization;
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
using System.Net;
using System.Text;

namespace 報到系統
{
    /// <summary>
    /// EVERY8D 簡訊服務提供者
    /// </summary>
    public class EVERY8DSMSProvider : BaseSMSProvider
    {
        // EVERY8D API 相關常數
        private static string BASE_URL = "https://new.e8d.tw/API21/HTTP";
        private static string API_URL_SEND = string.Format("{0}/SendParam.ashx", BASE_URL);
        private static string API_URL_CHECK_BALANCE = string.Format("{0}/GetCredit.ashx", BASE_URL);

        /// <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 (!IsValidMobileNumber(message.Mobile))
                {
                    failMessage = "手機號碼格式不正確";
                    return false;
                }

                var requestBody = new EVERY8DParamMMSBody
                {
                    SB = message.Subject,
                    UID = message.MMSAccount,
                    PWD = message.MMSPassword,
                    ATTACHMENT = message.QRCode
                };

                requestBody.RecipientDataList.Add(new EVERY8DRecipient
                {
                    Mobile = message.Mobile,
                    Param = message.Content,
                });

                string response = PostJson(API_URL_SEND, requestBody);

                return ParseMMSResponse(response, out failMessage);
            }
            catch (Exception ex)
            {
                failMessage = ex.Message;
                return false;
            }
        }

        /// <summary>
        /// 解析 EVERY8D API 回應
        /// </summary>
        private static bool ParseMMSResponse(string response, out string failMessage)
        {
            failMessage = "";

            try
            {
                EVERY8DMMSResponse responseObj = JsonConvert.DeserializeObject<EVERY8DMMSResponse>(response.Trim());

                if (responseObj.Result)
                    return true;

                failMessage = GetErrorMessage(responseObj.Status);
                return false;
            }
            catch
            {
                failMessage = string.Format("無法解析 API 回應：{0}", response);
                return false;
            }
        }

        /// <summary>
        /// 取得錯誤訊息
        /// </summary>
        private static string GetErrorMessage(string status)
        {
            Dictionary<string, string> errorMessages = new Dictionary<string, string>
            {
                { "-1", "參數錯誤，傳送失敗" },
                { "-2", "帳號或密碼錯誤，傳送失敗" },
                { "-3", "接收方屬於黑名單，傳送失敗" },
                { "-4", "預計發送時間超過24小時，傳送失敗" },
                { "-5", "內容長度超出限制，傳送失敗" },
                { "-8", "接收方手機號碼格式不符，傳送失敗" },
                { "-10", "接收方不支援MMS，傳送失敗" },
                { "-300", "帳號密碼不得為空" },
                { "101", "電信端回覆因收訊方手機關機、訊號不良、簡訊容量不足等異常原因，收訊失敗" },
                { "102", "電信端回覆因網路系統、設備出現異常，收訊失敗" },
                { "103", "電信端回覆因收訊方手機門號錯誤、空號或停用中，收訊失敗" },
                { "104", "因本手機門號為電信端之黑名單，故傳送失敗" },
                { "105", "電信端回覆經判斷因訊息內文含有敏感關鍵字進行阻擋，故傳送失敗" },
                { "106", "系統顯示經判斷因訊息內文含有敏感關鍵字進行阻擋，故傳送失敗" },
                { "301", "無額度(或額度不足)無法發送" },
                { "500", "表該門號為國際門號，請至帳號設定開啟國際簡訊發送功能" }
            };

            return errorMessages.ContainsKey(status) ? errorMessages[status] : string.Format("未知錯誤代碼：{0}", status);
        }

        /// <summary>
        /// 驗證帳號額度
        /// </summary>
        public static bool CheckBalance(out int balance, out string errorMessage)
        {
            balance = 0;
            errorMessage = "";

            try
            {
                InitializeSecuritySettings();

                var requestBody = new EVERY8DRequestBody();
                string response = PostForm(API_URL_CHECK_BALANCE, requestBody.ToFormData());

                if (decimal.TryParse(response, out decimal b))
                {
                    balance = (int)b;
                    return true;
                }
                errorMessage = string.Format("餘額查詢失敗: {0}", response);
                return false;
            }
            catch (Exception ex)
            {
                errorMessage = ex.Message;
                return false;
            }
        }
    }

    /// <summary>
    /// EVERY8D 簡訊接收者
    /// </summary>
    public class EVERY8DRecipient
    {
        [JsonProperty("Name")]
        public string Name { get; set; }

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

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

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

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

        public EVERY8DRecipient()
        {
            Name = string.Empty;
            Mobile = string.Empty;
            Email = string.Empty;
            SendTime = string.Empty;
            Param = string.Empty;
        }
    }

    /// <summary>
    /// EVERY8D 請求基礎類
    /// </summary>
    public class EVERY8DRequestBody
    {
        [JsonProperty("UID")]
        public string UID { get; set; }

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

        public EVERY8DRequestBody()
        {
            using (var dac = new DAC_MMSPlatform())
            {
                var platform = dac.SelectByCode(DAC_ProjectMMSAccount.EVERY8DPlatformCode);
                if (platform != null)
                {
                    UID = platform.Account;
                    PWD = platform.Password;
                }
            }
        }

        public NameValueCollection ToFormData()
        {
            var result = new NameValueCollection();
            var properties = this.GetType().GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance);

            foreach (var property in properties)
            {
                var jsonPropertyAttr = property.GetCustomAttributes(typeof(JsonPropertyAttribute), false).FirstOrDefault() as JsonPropertyAttribute;
                if (jsonPropertyAttr != null)
                {
                    var value = property.GetValue(this, null);
                    result.Add(jsonPropertyAttr.PropertyName, value?.ToString() ?? string.Empty);
                }
            }

            return result;
        }
    }

    /// <summary>
    /// EVERY8D MMS 請求
    /// </summary>
    public class EVERY8DParamMMSBody : EVERY8DRequestBody
    {
        [JsonProperty("SB")]
        public string SB { get; set; }

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

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

        [JsonProperty("RecipientDataList")]
        public List<EVERY8DRecipient> RecipientDataList { get; }

        public EVERY8DParamMMSBody()
        {
            SB = "活動通知";
            ATTACHMENT = string.Empty;
            TYPE = "png";
            RecipientDataList = new List<EVERY8DRecipient>();
        }
    }

    /// <summary>
    /// EVERY8D MMS 回應
    /// </summary>
    public class EVERY8DMMSResponse
    {
        [JsonProperty("Result")]
        public bool Result { get; set; }

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

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

    /// <summary>
    /// EVERY8D Credit 回應
    /// </summary>
    public class EVERY8DCreditResponse
    {
        [JsonProperty("Credit")]
        public decimal Credit { get; set; }

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

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