using System;
using System.Collections.Generic;
using System.Linq;
using LCU.Library.Internal.MemberPreferencesApiModels.Enums;
using LCU.Library.Internal.MemberPreferencesApiModels.Models;

namespace LCU.Library.Internal.MemberPreferencesApiModels.Entities
{
    public class MemberOptInSettings : Auditable
    {
        public MemberOptInSettings()
        {
        }

        public int Id { get; set; }
        public string UserId { get; set; }
        public string EStatements { get; set; }
        public string ENotifications { get; set; }
        public string UniversalOptIn { get; set; }
        public string LegalVersion { get; set; }
        public DateTime? LegalDate { get; set; }
        public string UnifiedOptInEmail { get; set; }
        public EmailStatus? UnifiedOptInEmailStatus { get; set; }
        public DateTime? UnifiedOptInEmailFirstSent { get; set; }
        public DateTime? UnifiedOptInEmailLastSent { get; set; }
        public int UnifiedOptInEmailStatusCount { get; set; } = 0;
        public string EStatementsEmail { get; set; }
        public EmailStatus? EStatementsEmailStatus { get; set; }
        public DateTime? EStatementsEmailFirstSent { get; set; }
        public DateTime? EStatementsEmailLastSent { get; set; }
        public int EStatementsEmailStatusCount { get; set; } = 0;
        public string ENotificationsEmail { get; set; }
        public EmailStatus? ENotificationsEmailStatus { get; set; }
        public DateTime? ENotificationsEmailFirstSent { get; set; }
        public DateTime? ENotificationsEmailLastSent { get; set; }
        public int ENotificationsEmailStatusCount { get; set; } = 0;

        public void ApplyAll(IReadOnlyCollection<MemberPreference> memberPreferences)
        {
            Id = 0;
            UserId = "";
            EStatements = null;
            ENotifications = null;
            UniversalOptIn = null;
            LegalVersion = null;
            LegalDate = null;
            UnifiedOptInEmail = null;
            EStatementsEmail = null;
            ENotificationsEmail = null;

            if (memberPreferences != null && memberPreferences.Any())
            {
                UserId = memberPreferences.First().UserId;
                foreach (var memberPreference in memberPreferences)
                {
                    Apply(memberPreference);
                }
            }
        }

        public void Apply(MemberPreference memberPreference)
        {
            void ClearUnifiedOptInEmailTracking()
            {
                UnifiedOptInEmailStatus = null;
                UnifiedOptInEmailFirstSent = null;
                UnifiedOptInEmailLastSent = null;
                UnifiedOptInEmailStatusCount = 0;
            }

            void ClearENotificationEmailTracking()
            {
                ENotificationsEmailStatus = null;
                ENotificationsEmailFirstSent = null;
                ENotificationsEmailLastSent = null;
                ENotificationsEmailStatusCount = 0;
            }

            void ClearEStatementsEmailTracking()
            {
                EStatementsEmailStatus = null;
                EStatementsEmailFirstSent = null;
                EStatementsEmailLastSent = null;
                EStatementsEmailStatusCount = 0;
            }

            switch (memberPreference.Preference)
            {
                case PreferenceType.UnifiedOptIn:
                    {
                        if (!memberPreference.Value.Equals(UniversalOptIn, StringComparison.OrdinalIgnoreCase))
                        {
                            ClearUnifiedOptInEmailTracking();
                        }

                        UniversalOptIn = memberPreference.Value;
                        LegalVersion = memberPreference.LegalReference;
                        LegalDate = DateTime.Now;

                        break;
                    }
                case PreferenceType.UnifiedOptInEmail:
                    {
                        ClearUnifiedOptInEmailTracking();
                        UnifiedOptInEmail = memberPreference.Value;

                        break;
                    }
                case PreferenceType.ENotification:
                    {
                        if (!memberPreference.Value.Equals(ENotifications, StringComparison.OrdinalIgnoreCase))
                        {
                            ClearENotificationEmailTracking();
                        }

                        ENotifications = memberPreference.Value;

                        break;
                    }
                case PreferenceType.ENotificationsEmail:
                    {
                        ClearENotificationEmailTracking();
                        ENotificationsEmail = memberPreference.Value;

                        break;
                    }
                case PreferenceType.EStatements:
                    {
                        if (!memberPreference.Value.Equals(EStatements, StringComparison.OrdinalIgnoreCase))
                        {
                            ClearEStatementsEmailTracking();
                        }

                        EStatements = memberPreference.Value;

                        break;
                    }
                case PreferenceType.EStatementsEmail:
                    {
                        ClearEStatementsEmailTracking();
                        EStatementsEmail = memberPreference.Value;

                        break;
                    }
                default:
                    throw new InvalidOperationException(
                        $"Unknown preference type update: {memberPreference.Preference}");
            }
        }

        public bool IsUnifiedPaperEnrolled()
        {
            return string.Equals(UniversalOptIn, DeliveryPreference.Paper, StringComparison.InvariantCultureIgnoreCase);
        }

        public bool IsUnifiedElectronicEnrolled()
        {
            return string.Equals(UniversalOptIn, DeliveryPreference.Electronic, StringComparison.InvariantCultureIgnoreCase);
        }

        public bool HasAnyUnifiedPreference()
        {
            return !string.IsNullOrWhiteSpace(UniversalOptIn);
        }

        public bool IsOldNoticesElectronicEnrolled()
        {
            return string.Equals(ENotifications, DeliveryPreference.Electronic, StringComparison.InvariantCultureIgnoreCase);
        }

        public bool IsOldStatementsElectronicEnrolled()
        {
            return string.Equals(EStatements, DeliveryPreference.Electronic, StringComparison.InvariantCultureIgnoreCase);
        }

        public bool Compare(MemberOptInSettings other)
        {
            return other != null && other.ENotifications == ENotifications &&
                   other.EStatements == EStatements &&
                   other.UniversalOptIn == UniversalOptIn &&
                   other.UnifiedOptInEmail == UnifiedOptInEmail &&
                   other.EStatementsEmail == EStatementsEmail &&
                   other.ENotificationsEmail == ENotificationsEmail;
        }
    }
}