using Sozsoft.MailQueue.Domain.Entities;
using Sozsoft.MailQueue.Domain.MailGeneration;
using Sozsoft.MailQueue.Domain.Shared;
using Sozsoft.Sender.Mail;
using Volo.Abp.BackgroundWorkers;
using Volo.Abp.Domain.Repositories;
using Volo.Abp.Timing;
using Volo.Abp.Uow;

namespace Sozsoft.MailQueue.Domain;

public class MailQueueWorker : BackgroundWorkerBase
{
    public Guid TemplateId { get; set; }
    public string TemplateName { get; set; }
    public MailQueueWorkerOptions Options { get; set; }

    protected ISozsoftEmailSender ErpEmailSender { get; }
    protected IRepository<BackgroundWorker_MailQueue> Repository { get; }
    public IClock Clock { get; }
    public ILogManager LogManager { get; }
    public ITableGenerator TableGenerator { get; }
    public IMailBodyGenerator MailBodyGenerator { get; }
    public IAttachmentGenerator AttachmentGenerator { get; }

    public MailQueueWorker(
        ISozsoftEmailSender erpEmailSender,
        IRepository<BackgroundWorker_MailQueue> repository,
        IClock clock,
        ILogManager logManager,
        ITableGenerator tableGenerator,
        IMailBodyGenerator mailBodyGenerator,
        IAttachmentGenerator attachmentGenerator)
    {
        ErpEmailSender = erpEmailSender;
        Repository = repository;
        Clock = clock;
        LogManager = logManager;
        TableGenerator = tableGenerator;
        MailBodyGenerator = mailBodyGenerator;
        AttachmentGenerator = attachmentGenerator;
    }

    /// <summary>
    /// Şablonun (TemplateId) gönderilmemiş kuyruk kayıtlarını işler: her kayıt için tablo, gövde ve
    /// ekler üretilir, mail gönderilir, sonuç kayda yazılır. Akış: tablo → gövde → ekler → gönderim.
    /// </summary>
    public override async Task StartAsync(CancellationToken cancellationToken = default)
    {
        var uowManager = LazyServiceProvider.LazyGetRequiredService<IUnitOfWorkManager>();
        using var uow = uowManager.Begin();
        var jobId = $"{TemplateId}-{Clock.Now:yyyy-MM-dd-HH-mm-ss}";

        var queues = await Repository.GetListAsync(a => a.TemplateId == TemplateId && !a.SendStatus, cancellationToken: cancellationToken);
        foreach (var queue in queues)
        {
            // Her kayıt kendi UoW'sinde: bir kaydın hatası diğerlerinin gönderimini ve kaydını düşürmez.
            using var uow2 = uowManager.Begin(requiresNew: true, isTransactional: false);
            try
            {
                await ProcessQueueAsync(queue, jobId, cancellationToken);
                await uow2.CompleteAsync(cancellationToken);
            }
            catch (Exception ex)
            {
                LogManager.LogError($"Hata. Kuyruk Id: {queue.Id}. {ex}", "HATA", "KUYRUK", queue.Id, jobId);
            }
        }

        await uow.CompleteAsync(cancellationToken);
    }

    private async Task ProcessQueueAsync(BackgroundWorker_MailQueue queue, string jobId, CancellationToken cancellationToken)
    {
        var tables = await TableGenerator.GenerateAsync(queue.TableName, queue.TableParameter, queue.Id);

        var mailBody = await MailBodyGenerator.GenerateAsync(
            TemplateName,
            queue.MailParameter,
            queue.Id,
            tables,
            jobId);

        // Ekler tablo şablonlarından (IN olmayanlar: PDF, XLS, TXT) üretilir.
        var attachments = await AttachmentGenerator.GenerateAsync(tables.Values.ToList(), queue.Id, jobId);
        // IN olmayan bir tablo belirtilmiş ama hiçbiri üretilememişse hata vardır, gönderilmez.
        if (tables.Values.Any(a => a.DosyaTipi != "IN") && attachments.IsNullOrEmpty())
        {
            LogManager.LogWarning("Table attachments could not be generated", "ATTACHMENT", "KUYRUK", queue.Id, jobId);
            return;
        }

        var senderKeyValue = queue.From.Split(":");
        var sender = new KeyValuePair<string, string>(
            senderKeyValue.ElementAtOrDefault(0),
            senderKeyValue.ElementAtOrDefault(1));
        var result = await ErpEmailSender.SendEmailAsync(
            queue.To.Split(";").Select(a => a.Trim()).ToArray(),
            sender,
            null,
            mailBody,
            Options.MailSubject,
            attachments,
            true);

        if (result.Success)
        {
            queue.AwsMessageId = result.MessageId;
        }
        else
        {
            LogManager.LogWarning($"Mail could not be sent. Message: {result.ErrorMessage}", "MAILSEND", "KUYRUK", queue.Id, jobId);
            queue.AwsMessageId = result.ErrorMessage;
        }

        queue.SendStatus = result.Success;
        queue.SendTime = Clock.Now;
        await Repository.UpdateAsync(queue, cancellationToken: cancellationToken);
    }
}