using System;
using System.Collections.Generic;
using SQLite;

namespace Wino.Core.Domain.Entities.Shared;

/// <summary>
/// Back storage for simple name-address book.
/// These values will be inserted during MIME fetch.
/// </summary>

// TODO: This can easily evolve to Contact store, just like People app in Windows 10/11.
// Do it.
public class AccountContact : IEquatable<AccountContact>, IContactDisplayItem
{
    /// <summary>
    /// E-mail address of the contact.
    /// </summary>
    [PrimaryKey]
    public string Address { get; set; }

    /// <summary>
    /// Display name of the contact.
    /// </summary>
    public string Name { get; set; }

    /// <summary>
    /// File ID for the contact picture stored on disk.
    /// The actual file lives at {ApplicationDataFolderPath}/contacts/{ContactPictureFileId}.jpg.
    /// </summary>
    public Guid? ContactPictureFileId { get; set; }

    /// <summary>
    /// All registered accounts have their contacts registered as root.
    /// Root contacts must not be overridden by any configuration.
    /// They are created on account creation.
    /// </summary>
    public bool IsRootContact { get; set; }

    /// <summary>
    /// When true, indicates that the contact has been manually modified by the user.
    /// Contacts with this flag set to true should not be updated during synchronization.
    /// </summary>
    public bool IsOverridden { get; set; } = false;

    public string DisplayName => string.IsNullOrWhiteSpace(Name) ? Address : Name;
    AccountContact IContactDisplayItem.PreviewContact => this;

    public override bool Equals(object obj)
    {
        return Equals(obj as AccountContact);
    }

    public bool Equals(AccountContact other)
    {
        return other is not null &&
               Address == other.Address &&
               Name == other.Name;
    }

    public override int GetHashCode()
    {
        return HashCode.Combine(Address, Name);
    }

    public static bool operator ==(AccountContact left, AccountContact right)
    {
        return EqualityComparer<AccountContact>.Default.Equals(left, right);
    }

    public static bool operator !=(AccountContact left, AccountContact right)
    {
        return !(left == right);
    }
}
