using System.Net.Mail;
using System.Text;

using FabApprovalWorkerService.Models;
using FabApprovalWorkerService.Services;

using Infineon.Monitoring.MonA;

using Quartz;

namespace FabApprovalWorkerService.Workers;

public class CAFollowUpWorker : IJob {
    private readonly ILogger<CAFollowUpWorker> _logger;
    private readonly ICorrectiveActionService _caService;
    private readonly IUserService _userService;
    private readonly ISmtpService _smtpService;
    private readonly IMonInClient _monInClient;
    private readonly string _baseUrl;

    public CAFollowUpWorker(ILogger<CAFollowUpWorker> logger,
                            ICorrectiveActionService caService,
                            IUserService userService,
                            ISmtpService smtpService,
                            IMonInClient monInClient,
                            AppSettings appSettings) {
        _logger = logger ?? throw new ArgumentNullException("ILogger not injected");
        _caService = caService ?? throw new ArgumentNullException("ICorrectiveActionService not injected");
        _userService = userService ?? throw new ArgumentNullException("IUserService not injected");
        _smtpService = smtpService ?? throw new ArgumentNullException("ISmtpService not injected");
        _monInClient = monInClient ?? throw new ArgumentNullException("IMonInClient not injected");
        _baseUrl = appSettings.BaseUrl;
    }

    public async Task Execute(IJobExecutionContext context) {
        DateTime start = DateTime.Now;
        bool isInternalError = false;
        StringBuilder errorMessage = new();
        string metricName = "CAFollowUpWorker";

        try {
            _logger.LogInformation("Attempting to create follow up approvals for CAs needing it in five days");

            IEnumerable<CorrectiveAction> followUpCAs = (await _caService.GetCorrectiveActionsWithFollowUpInFiveDays())
                                                        .ToList();
            foreach (CorrectiveAction ca in followUpCAs) {
                await _caService.CreateCorrectiveActionFollowUpApproval(ca.CANo, ca.QAID);

                string qaEmail = await _userService.GetUserEmail(ca.QAID);
                IEnumerable<MailAddress> recipients = new List<MailAddress>() {
                    new MailAddress(qaEmail)
                };

                IEnumerable<MailAddress> ccRecipients = new List<MailAddress>();

                string subject = $"Fab Approval CA Follow Up - CA# {ca.CANo} - {ca.CATitle}";

                StringBuilder bodyBuilder = new();
                bodyBuilder.Append($"Corrective Action# {ca.CANo} is ready for follow up. Please log on to Fab Approval ");
                bodyBuilder.Append("and review this item. <br/><br/>");
                bodyBuilder.Append($"{_baseUrl}/CorrectiveAction/Edit?issueID={ca.CANo} <br/><br/>");
                bodyBuilder.Append("If you have any questions or trouble, please contact a site administrator.");
                bodyBuilder.Append("<br/><br/> Thank You!");

                await _smtpService.SendEmail(recipients, ccRecipients, subject, bodyBuilder.ToString());
            }

            _logger.LogInformation("Successfully created follow up approvals for CAs needing it in five days");
        } catch (Exception ex) {
            StringBuilder errMsgBuilder = new();
            errMsgBuilder.Append("An exception occurred when attempting to create follow up approvals for ");
            errMsgBuilder.Append($"CAs needing it in five days. Exception: {ex.Message}");
            _logger.LogError(errMsgBuilder.ToString());
            isInternalError = true;
        } finally {
            DateTime end = DateTime.Now;
            double latencyInMS = (end - start).TotalMilliseconds;
            _monInClient.PostMetric(metricName + "Latency", latencyInMS);

            if (isInternalError) {
                _monInClient.PostStatus(metricName, State.Critical);
            } else {
                _monInClient.PostStatus(metricName, State.Ok);
            }
        }
    }
}