using System.Text.Json;
using Amazon;
using Amazon.SQS;
using Amazon.SQS.Model;
using Kurs.Sender.Mail.AmazonSes;
using Kurs.MailQueue.Domain.Entities;
using Microsoft.Extensions.Configuration;
using Volo.Abp.Domain.Repositories;
using Volo.Abp.Domain.Services;

namespace Kurs.MailQueue.Domain.MailTracking;

public class MailTrackingManager : DomainService
{
    private readonly IRepository<BackgroundWorker_MailQueueEvents> repository;
    private readonly IConfiguration configuration;

    public MailTrackingManager(
        IRepository<BackgroundWorker_MailQueueEvents> repository,
        IConfiguration configuration
        )
    {
        this.repository = repository;
        this.configuration = configuration;
    }

    /// <summary>
    /// AWS SQS Kuyrugundaki mesajlari alip isleyerek
    /// MailQueue_Events tablosuna kaydeder
    /// </summary>
    /// <returns></returns>
    public async Task StartAsync()
    {
        var accessKey = configuration.GetValue<string>(AmazonSesEmailSettingNames.AccessKey);
        var accessKeyId = configuration.GetValue<string>(AmazonSesEmailSettingNames.AccessKeyId);
        var region = configuration.GetValue<string>(AmazonSesEmailSettingNames.Region);
        var regionEndPoint = RegionEndpoint.GetBySystemName(region);
        var client = new AmazonSQSClient(accessKeyId, accessKey, regionEndPoint);

        var queueUrl = await client.GetQueueUrlAsync("mail-delivery-tracking-queue");
        if (queueUrl.HttpStatusCode != System.Net.HttpStatusCode.OK)
        {
            throw new System.Exception(queueUrl.HttpStatusCode.ToString());
        }

        var messages = await client.ReceiveMessageAsync(new ReceiveMessageRequest
        {
            QueueUrl = queueUrl.QueueUrl,
            MaxNumberOfMessages = 10,
            //WaitTimeSeconds = 5,
        });
        if (messages.HttpStatusCode != System.Net.HttpStatusCode.OK)
        {
            throw new System.Exception(messages.HttpStatusCode.ToString());
        }

        // Event examples: https://docs.aws.amazon.com/ses/latest/dg/event-publishing-retrieving-sns-examples.html#event-publishing-retrieving-sns-bounce
        foreach (var message in messages.Messages)
        {
            using JsonDocument doc = JsonDocument.Parse(message.Body);
            JsonElement root = doc.RootElement;
            using JsonDocument doc2 = JsonDocument.Parse(root.GetProperty("Message").ToString());
            JsonElement ev = doc2.RootElement;

            var mail = ev.GetProperty("mail");
            var eventType = ev.GetProperty("eventType").ToString();

            var item = new BackgroundWorker_MailQueueEvents
            {
                AwsMessageId = mail.GetProperty("messageId").ToString(),
                Event = eventType,
                EventDate = mail.GetProperty("timestamp").GetDateTime(),
                MailAddress = string.Join(",", mail.GetProperty("destination").EnumerateArray())
            };

            switch (eventType)
            {
                case "Bounce":
                    var bounce = ev.GetProperty("bounce");
                    item.EventDate = bounce.GetProperty("timestamp").GetDateTime();
                    item.MailAddress = string.Join(",", (bounce.GetProperty("bouncedRecipients").EnumerateArray().Select(a => a.GetProperty("emailAddress").ToString()).ToList()));
                    item.ResponseDescription = bounce.ToString();
                    break;
                case "Complaint":
                    var complaint = ev.GetProperty("complaint");
                    item.EventDate = complaint.GetProperty("timestamp").GetDateTime();
                    item.MailAddress = string.Join(",", (complaint.GetProperty("complainedRecipients").EnumerateArray().Select(a => a.GetProperty("emailAddress").ToString()).ToList()));
                    item.ResponseDescription = complaint.ToString();
                    break;
                case "Delivery":
                    var delivery = ev.GetProperty("delivery");
                    item.EventDate = delivery.GetProperty("timestamp").GetDateTime();
                    item.MailAddress = string.Join(",", delivery.GetProperty("recipients").EnumerateArray());
                    item.ResponseDescription = delivery.ToString();
                    break;
                case "Reject":
                    item.ResponseDescription = ev.GetProperty("reject").ToString();
                    break;
                case "Open":
                    var open = ev.GetProperty("open");
                    item.EventDate = open.GetProperty("timestamp").GetDateTime();
                    item.ResponseDescription = open.ToString();
                    break;
                case "Click":
                    var click = ev.GetProperty("click");
                    item.EventDate = click.GetProperty("timestamp").GetDateTime();
                    item.ResponseDescription = click.ToString();
                    break;
                case "Rendering Failure":
                    item.ResponseDescription = ev.GetProperty("failure").ToString();
                    break;
                case "DeliveryDelay":
                    var deliveryDelay = ev.GetProperty("deliveryDelay");
                    item.EventDate = deliveryDelay.GetProperty("timestamp").GetDateTime();
                    item.MailAddress = string.Join(",", (deliveryDelay.GetProperty("delayedRecipients").EnumerateArray().Select(a => a.GetProperty("emailAddress").ToString()).ToList()));
                    item.ResponseDescription = deliveryDelay.ToString();
                    break;
                case "Subscription":
                    var subscription = ev.GetProperty("subscription");
                    item.EventDate = subscription.GetProperty("timestamp").GetDateTime();
                    item.ResponseDescription = subscription.ToString();
                    break;
                case "Send":
                default:
                    break;
            }

            // Mesaji DBye ekle
            await repository.InsertAsync(item, autoSave: true);

            // Mesaji kuyruktan sil
            await client.DeleteMessageAsync(queueUrl.QueueUrl, message.ReceiptHandle);
        }
    }

}