using System.ComponentModel.DataAnnotations;

namespace Gremlin_BlazorServer.Data.EntityClasses;

public class Account : IMetadata
    //: IEquatable<Account>
{
    //primary key:
    [Required] public uint AccountId { get; set; }

    //foreign keys:
    // [Required] public uint ParentAccountId { get; set; }
    public string? AccountTypeCode { get; set; }
    public string? SubMarketCode { get; set; }

    //navigation properties:
    public AccountType? AccountType { get; set; }
    public SubMarket? SubMarket { get; set; }
    public IList<Contact>? Contacts { get; set; }

    public IList<SalesRep>? SalesReps { get; set; }
    // public IList<CustomDescription>? CustomDescriptions { get; set; }

    //class properties:
    [Required] public string? AccountName { get; set; }
    public string Notes { get; set; } = string.Empty;
    [Required] public string? Street { get; set; }
    [Required] public uint Zip { get; set; }
    [Required] public string? City { get; set; }
    public string FloorOrBuilding { get; set; } = string.Empty;
    public float Longitude { get; set; }
    public float Latitude { get; set; }
    public string PhoneNumber { get; set; } = string.Empty;
    public string FaxNumber { get; set; } = string.Empty;
    public string Webpage { get; set; } = string.Empty;
    public string EMail { get; set; } = string.Empty;

    //Agilent-specific Properties:
    public uint SapAccountNumber { get; set; }
    public DateTime AccountCreatedInSapOn { get; set; }

    //metadata:
    public DateTime DataCreationDate { get; set; } = DateTime.Now;
    public DateTime DataModificationDate { get; set; } = DateTime.Now;
    public DateTime DataValidFrom { get; set; } = DateTime.Now;
    public DateTime DataValidUntil { get; set; } = DateTime.MaxValue;
    public string DataModificationByUser { get; set; } = "Gremlin_BlazorServer";
    public uint DataVersionNumber { get; set; }
    public string? DataVersionComment { get; set; } = string.Empty;
    public string DataStatus { get; set; } = "Active";

    //IBase
    //tbd

    public bool Equals(Account? other) {
        if (other is null) return false;
        return SapAccountNumber == other.SapAccountNumber
               && AccountName == other.AccountName
               && City == other.City
               && EMail == other.EMail
               && PhoneNumber == other.PhoneNumber
               && Street == other.Street
               && Zip == other.Zip;
    }

    public static bool operator ==(Account? account1, Account? account2) {
        if (account1 is null || account2 is null) return false;
        if (account1.SapAccountNumber == 0) return false;
        if (account2.SapAccountNumber == 0) return false;
        return account1.SapAccountNumber == account2.SapAccountNumber
               && account1.AccountName == account2.AccountName
               && account1.City == account2.City
               && account1.EMail == account2.EMail
               && account1.PhoneNumber == account2.PhoneNumber
               && account1.Street == account2.Street
               && account1.Zip == account2.Zip;
    }

    public static bool operator !=(Account? account1, Account? account2)
    {
        if (account1 is null || account2 is null) return false;
        if (account1.SapAccountNumber == 0) return false;
        if (account2.SapAccountNumber == 0) return false;
        return account1.SapAccountNumber != account2.SapAccountNumber
               && account1.AccountName != account2.AccountName
               && account1.City != account2.City
               && account1.EMail != account2.EMail
               && account1.PhoneNumber != account2.PhoneNumber
               && account1.Street != account2.Street
               && account1.Zip != account2.Zip;
        
    }

    // public override bool Equals(object? obj) {
    //     if (obj == null) return false;
    //     return obj is Account && base.Equals(obj);
    // }
    //
    // public override int GetHashCode() => $"{AccountName}:{City}:{Street}:{Zip}".GetHashCode();
    
    public List<Account> AddIfUniqueTo(List<Account> accounts) {
        if (accounts.Count > 0 && SapAccountNumber == accounts[^1].SapAccountNumber) return accounts;

        if (accounts.Any(account => SapAccountNumber == account.SapAccountNumber)) return accounts;

        accounts.Add(this);
        return accounts;
    }
}