using Newtonsoft.Json;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.Net;
using System.Text;

namespace 報到系統
{
    public class BaseSMSProvider
    {
        /// <summary>
        /// 驗證手機號碼格式
        /// </summary>
        protected static bool IsValidMobileNumber(string mobile)
        {
            if (string.IsNullOrEmpty(mobile))
                return false;

            mobile = mobile.Trim();
            return System.Text.RegularExpressions.Regex.IsMatch(mobile, @"^09\d{8}$");
        }

        /// <summary>
        /// 初始化安全設定
        /// </summary>
        protected static void InitializeSecuritySettings()
        {
            ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;
            ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true;
        }

        /// <summary>
        /// 發送 JSON POST 請求
        /// </summary>
        //protected static string PostJson(string url, object jsonBody, Dictionary<string, string> headers = null, int timeoutSeconds = 60)
        //{
        //    var json = JsonConvert.SerializeObject(jsonBody);
        //    var data = Encoding.UTF8.GetBytes(json);

        //    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
        //    request.Method = "POST";
        //    request.ContentType = "application/json";
        //    request.ContentLength = data.Length;

        //    // 設定 timeout（毫秒）
        //    request.Timeout = timeoutSeconds * 1000;
        //    // 可選：設定讀取/寫入 timeout
        //    request.ReadWriteTimeout = timeoutSeconds * 1000;

        //    // 加入 headers
        //    if (headers != null)
        //    {
        //        foreach (var header in headers)
        //        {
        //            request.Headers.Add(header.Key, header.Value);
        //        }
        //    }

        //    // 寫入 request body
        //    using (var stream = request.GetRequestStream())
        //    {
        //        stream.Write(data, 0, data.Length);
        //    }

        //    // 取得 response
        //    using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
        //    using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
        //    {
        //        return reader.ReadToEnd();
        //    }
        //}

        protected static string PostJson(string url, object jsonBody, Dictionary<string, string> headers = null, int timeoutSeconds = 60)
        {
            using (WebClient client = new WebClient())
            {
                client.Encoding = Encoding.UTF8;
                client.Headers.Add("Content-Type", "application/json");
                if (headers != null)
                {
                    foreach (var header in headers)
                    {
                        client.Headers.Add(header.Key, header.Value);
                    }
                }
                return client.UploadString(url, "POST", JsonConvert.SerializeObject(jsonBody));
            }
        }

        /// <summary>
        /// 發送表單 POST 請求
        /// </summary>
        protected static string PostForm(string url, NameValueCollection formData)
        {
            using (WebClient client = new WebClient())
            {
                client.Encoding = Encoding.UTF8;
                return Encoding.UTF8.GetString(client.UploadValues(url, "POST", formData));
            }
        }

    }
}