using System;
using System.Threading.Tasks;
using MimeKit;
using Serilog;
using MailKit.Net.Smtp;
using webapi.Infractructure.Helpers;
using webapi.Infrastructure.Model;
using System.Collections.Generic;
using webapi.Infractructure.Resources;
using System.Linq;
using webapi.Infrastructure.Core;
using webapi.Application.Services;

namespace webapi.Infrastructure.Services
{
    public class EmailService: IEmailService
    {
        readonly IEmailSettings _settings;
        readonly ILogger _log;
        readonly IConfigureService _configureService;
        readonly ISPHandlerService _spHandlerService;

        public EmailService(ILogger log, IConfigureService configureService, IEmailSettings settings, ISPHandlerService handlerService) {
            _settings = settings;
            _configureService = configureService;
            _spHandlerService = handlerService;
            _log = log;
        }
        public async Task SendRegisterNewEmail(string username, string password, string email)
        {
            var letter = new Letter() { 
                Username = username, 
                Password = password 
            };
            //string emailError = string.Empty;
            var bodyBuilder = new BodyBuilder()
            {
                HtmlBody = TemplateHelper.Generate(letter, Constants.Email.TEMPLATE_REGISTER_NEW),
                //TextBody = $"Для подтверждения e-mail кликните на этой ссылке: {url}"
            };
            string subj = TaloyhtioCondoCommon.RegisterBox_EmailSubject;
            _log.Information($"SendRegisterNewEmail message sent to email: {email}, Message: \n{bodyBuilder.HtmlBody}");
            await Send(email, subj, bodyBuilder.ToMessageBody());
            _log.Information($"SendRegisterNewEmail message sent");
        }
        public async Task SendRegisterExistingEmail(string username, string email)
        {
            var letter = new Letter() { 
                Username = username 
            };
            //string emailError = string.Empty;
            var bodyBuilder = new BodyBuilder()
            {
                HtmlBody = TemplateHelper.Generate(letter, Constants.Email.TEMPLATE_REGISTER_EXISTING),
                //TextBody = $"Для подтверждения e-mail кликните на этой ссылке: {url}"
            };
            //string body = TemplateHelper.Generate(letter, Constants.Email.TEMPLATE_REGISTER_EXISTING);
            string subj = TaloyhtioCondoCommon.RegisterBox_EmailSubject;
            _log.Information($"SendRegisterExistingEmail message sent to email: {email}, Message: \n{bodyBuilder.HtmlBody}");
            await Send(email, subj, bodyBuilder.ToMessageBody());
            _log.Information($"SendRegisterExistingEmail message sent");
        }
        public async Task SendUserFlatApprovalEmail(Guid pmcId, IEnumerable<string> approverEmails, string userName, string flatTitle)
        {
            _log.Information($"pmcId: {pmcId}");
            var pmcUrl = await _spHandlerService.GetTaylohtioPMCUrl(pmcId);
            _log.Information($"pmc url: {pmcUrl}");

            var letter = new Letter()
            {
                FlatTitle = flatTitle,
                Url = pmcUrl.Trim('"') + "/_layouts/15/Taloyhtio/IDP/PendingApprovalRequest.aspx"
            };
            //string emailError = string.Empty;
            //var lang = await _spService.GetPMCLang(pmcId);
            //Thread.CurrentThread.CurrentCulture = new CultureInfo(lang);
            //Thread.CurrentThread.CurrentUICulture = new CultureInfo(lang);

            _log.Information($"Templates folder path: {System.Web.Hosting.HostingEnvironment.MapPath("~\\bin\\Templates")}");

            var bodyBuilder = new BodyBuilder()
            {
                HtmlBody = TemplateHelper.Generate(letter, Constants.Email.TEMPLATE_NOTIFY_APPROVER),
                //TextBody = $"Для подтверждения e-mail кликните на этой ссылке: {url}"
            };
            string subj = TaloyhtioCondoCommon.Approver_EmailSubject;

            foreach (var email in approverEmails)
            {
                _log.Information($"SendUserFlatApprovalEmail message sent to email: {email}, Message: \n{bodyBuilder.HtmlBody}");
                await Send(email, subj, bodyBuilder.ToMessageBody());
                _log.Information($"SendUserFlatApprovalEmail message sent");
            }
        }
        public async Task SendUserFlatApprovalRequestApprovedEmail(Guid pmcId, string email, string userName, string flatTitle)
        {
            var letter = new Letter()
            {
                FlatTitle = flatTitle
            };
            //string emailError = string.Empty;
            //var lang = await _spService.GetPMCLang(pmcId);
            //Thread.CurrentThread.CurrentCulture = new CultureInfo(lang);
            //Thread.CurrentThread.CurrentUICulture = new CultureInfo(lang);

            _log.Information($"Templates folder path: {System.Web.Hosting.HostingEnvironment.MapPath("~\\bin\\Templates")}");

            var bodyBuilder = new BodyBuilder()
            {
                HtmlBody = TemplateHelper.Generate(letter, Constants.Email.TEMPLATE_REQUEST_APPROVED),
                //TextBody = $"Для подтверждения e-mail кликните на этой ссылке: {url}"
            };
            string subj = TaloyhtioCondoCommon.RequestApproved_EmailSubject;

            _log.Information($"SendUserFlatApprovalRequestApprovedEmail message sent to email: {email}, Message: \n{bodyBuilder.HtmlBody}");
            await Send(email, subj, bodyBuilder.ToMessageBody());
            _log.Information($"SendUserFlatApprovalRequestApprovedEmail message sent ");

        }
        public async Task SendUserFlatApprovalRequestRejectedEmail(Guid pmcId, string email, string userName, string flatTitle)
        {
            var letter = new Letter()
            {
                FlatTitle = flatTitle
            };
            //string emailError = string.Empty;
            //var lang = await _spService.GetPMCLang(pmcId);
            //Thread.CurrentThread.CurrentCulture = new CultureInfo(lang);
            //Thread.CurrentThread.CurrentUICulture = new CultureInfo(lang);

            _log.Information($"Templates folder path: {System.Web.Hosting.HostingEnvironment.MapPath("~\\bin\\Templates")}");

            var bodyBuilder = new BodyBuilder()
            {
                HtmlBody = TemplateHelper.Generate(letter, Constants.Email.TEMPLATE_REQUEST_REJECTED),
            };
            string subj = TaloyhtioCondoCommon.RequestRejected_EmailSubject;

            _log.Information($"SendUserFlatApprovalRequestRejectedEmail message sent to email: {email}, Message: \n{bodyBuilder.HtmlBody}");
            await Send(email, subj, bodyBuilder.ToMessageBody());
            _log.Information($"SendUserFlatApprovalRequestRejectedEmail message sent ");
        }
        private async Task<bool> Send(string toAddressesStr, string subj, MimeEntity body, string fromAddress = null)
        {
            try
            {
                _log.Information($"Message about to send toAddressesStr: {toAddressesStr}, subj: {subj}, body: {body == null}, fromAddress: {fromAddress}");
                if (string.IsNullOrEmpty(toAddressesStr))
                {
                    _log.Warning($"Argument is null: {nameof(toAddressesStr)}");
                    return false;
                }

                var toAddresses = toAddressesStr.Split(new[] { "," }, StringSplitOptions.RemoveEmptyEntries);
                if (toAddresses.Length == 0)
                {
                    _log.Warning($"Argument is empty: {nameof(toAddresses)}");
                    return false;
                }

                await CheckSPSettings();

                //string smtpServer = SPAdministrationWebApplication.Local.OutboundMailServiceInstance.Server.Address;
                //string smtpFrom = fromAddress ?? SPAdministrationWebApplication.Local.OutboundMailSenderAddress;
                var smtpServer = _settings.SmtpServer;
                var smtpFrom = _settings.FromAddress;

                foreach (string to in toAddresses)
                {
                    var mailMessage = new MimeMessage(
                        (fromAddress ?? smtpFrom).Split(new[] { "," }, StringSplitOptions.RemoveEmptyEntries)
                            .Select(x => new MailboxAddress(x)),
                        new[] { new MailboxAddress(to) },
                        subj, body);
                    
                    //Create the SMTP client object and send the message
                    using (var emailClient = new SmtpClient())
                    {
                        _log.Warning($"Send email via : {smtpServer}:{_settings.SmtpPort}, to: {string.Join(";", mailMessage.To)}, from: {string.Join(";", mailMessage.From)}");
                        emailClient.Connect(smtpServer, _settings.SmtpPort); //, _settings.SmtpPort, true);

                        _log.Information($"Sending email body: {mailMessage.HtmlBody}");
                        await emailClient.SendAsync(mailMessage);
                        emailClient.Disconnect(true);
                    }
                }
                return true;
            }
            catch (Exception x)
            {
                _log.Error($"Error occured during sending email: {x.Message}\n{x.StackTrace}", x);
                return false;
            }
        }
        private async Task CheckSPSettings() {
            await Task.CompletedTask;
            //var spSettings = await _configureService.GetEmailSettings();
            //if (spSettings != null)
            //{
            //    _settings.SmtpServer = spSettings.SmtpServer;
            //    _settings.FromAddress = spSettings.FromAddress;
            //}
        }
    }
}