using System;
using System.Collections.Generic;
using System.Linq;
using LCU.API.Collections.CollectionsApiLib.Models;
using LCU.API.Collections.RepoApi.Domain.Extensions;
using LCU.API.Collections.RepoApi.Domain.Processing;
using LCU.API.Collections.RepoApi.Extensions;
using LCU.Shared.Collections.RepoApiLib.Models;

namespace LCU.API.Collections.RepoApi.Domain.AlertChecker
{
    public class O4rNoRepoChecker : IAlertChecker
    {
        private readonly RepoType _repoType;
        private const string O4RStatus = "O4R";
        private const string EmailDestination = "RepoManagerNoRepoCo@landmarkcu.com";

        public O4rNoRepoChecker(RepoType repoType)
        {
            _repoType = repoType;
        }

        private int GetDayCount()
        {
            switch (_repoType)
            {
                case RepoType.Voluntary: return 2;
                case RepoType.Involuntary: return 60;
                case RepoType.PreSkip: return 31;
                default: return -1;
            }
        }

        private int GetRepeatDayCount()
        {
            switch (_repoType)
            {
                case RepoType.Voluntary: return 1;
                case RepoType.Involuntary: return 30;
                default: return 0;
            }
        }

        public bool ShouldSendRepeatedAlert(int daysInStatus, int dayCount, int repeatCount)
        {
            return (
                daysInStatus > dayCount
                && (repeatCount > 0)
                && ((daysInStatus - dayCount) % repeatCount == 0)
            );
        }

        public bool IsRepoAssigned(RepoAccount repoAccount)
        {
            foreach (var collateral in repoAccount.Collaterals)
            {
                if (collateral.RepoCompanySelections?.FirstOrDefault(x => x.RepoCompanyAssignmentDate != null && x.RepoType == _repoType) != null)
                {
                    return true;
                }
            }

            return false;
        }

        public List<EventAlert> CheckForAlert(RepoAccountProcessingSlip slip)
        {
            var daysInStatus = slip.UpdatedRepoAccount.GetDaysInStatus(O4RStatus);
            if (daysInStatus > 0 && slip.UpdatedRepoAccount.Status == O4RStatus)
            {
                // In order to reduce duplicate notifications, do not create a notification if no repo is assigned. 
                // An 'action needed' item will be created for O4R No Repo if no repo is assigned. A notification is redundant.
                if (daysInStatus < GetDayCount() || !IsRepoAssigned(slip.UpdatedRepoAccount))
                {
                    return null;
                }

                if (daysInStatus == GetDayCount() || ShouldSendRepeatedAlert(daysInStatus, GetDayCount(), GetRepeatDayCount()))
                {
                    return new List<EventAlert>
                    {
                        new EventAlert()
                        {
                            RepoId = slip.UpdatedRepoAccount.RepoId,
                            AccountNo = slip.UpdatedRepoAccount.AccountNo,
                            Message = "O4R No Repo",
                            CreatedBy = "Batch",
                            DateAdded = DateTime.Now,
                            EmailRecipient = _repoType == RepoType.PreSkip
                                ? EmailDestination
                                : null,
                            EmailBody = _repoType == RepoType.PreSkip
                                ? CreateEmailBody(slip.UpdatedRepoAccount)
                                : null
                        }
                    };
                }
            }

            return null;
        }

        private string CreateEmailBody(RepoAccount repoAccount)
        {
            var message = "PreSkip has ended, please file a Skip Claim.<br/><br/>";
            var member = repoAccount.Borrowers?.First(b => b.OwnershipType == 6);
            var memberName = "Member Name: " + member?.IndividualName + "<br/>";
            var accountNo = "Account No: " + repoAccount.AccountNo + "<br/>";
            var collateral = repoAccount.Collaterals.FirstOrDefault(c => c.RepoCompanySelections?.FirstOrDefault(x => x.RepoType == _repoType) != null);
            var year = "Year: " + collateral.Year + "<br/>";
            var make = "Make: " + collateral.Make + "<br/>";
            var model = "Model: " + collateral.Model + "<br/>";
            var vin = "VIN: " + collateral.Vin + "<br/>";

            return string.Concat(message, memberName, accountNo, year, make, model, vin);
        }
    }
}