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

namespace LCU.API.Collections.RepoApi.Domain.AlertChecker
{
    public class RtcLetterNotFoundChecker : IAlertChecker
    {
        private readonly string _document;
        private readonly IEnumerable<string> _actionCodes;
        private const string O4RStatus = "O4R";
        private const string StateWisconsin = "WI";

        public RtcLetterNotFoundChecker(string document, IEnumerable<string> actionCodes)
        {
            _document = document;
            _actionCodes = actionCodes.Select(code => code.Trim().ToUpper());
        }

        public List<EventAlert> CheckForAlert(RepoAccountProcessingSlip slip)
        {
            if (slip.Member?.Address == null || slip.Member.Address.State != StateWisconsin || slip.Letters == null)
            {
                return null;
            }

            foreach (var collateral in slip.UpdatedRepoAccount.Collaterals)
            {
                if (collateral.RepoCompanySelections?.FirstOrDefault(x => x.RepoType == RepoType.Voluntary) != null)
                {
                    return null;
                }
            }

            var letters = slip.Letters;
            if (IsLetterMissing(letters) && (slip.UpdatedRepoAccount.Status.ToUpper().Trim() == O4RStatus))
            {
                return new List<EventAlert>
                {
                    new EventAlert()
                    {
                        RepoId = slip.UpdatedRepoAccount.RepoId,
                        AccountNo = slip.UpdatedRepoAccount.AccountNo,
                        Message = _document + " Not Found",
                        CreatedBy = "Batch",
                        DateAdded = DateTime.Now
                    }
                };
            }

            return null;
        }

        private bool IsLetterMissing(IEnumerable<RepoLetter> letters)
        {
            var sentLetterCodes = letters.Select(x => x.ActionCode).ToList();
            foreach (var actionCode in _actionCodes)
            {
                if (sentLetterCodes.Contains(actionCode))
                {
                    return false;
                }
            }

            return true;
        }
    }
}