using System.ComponentModel;
using ytLive.Helpers;
using ytLive.Models;
using ytLive.ViewModels;

namespace ytLive.ViewModels;
public sealed record DialogEntry(SocialService Service, string Handle, string ProfileUrl, string? FediverseSoftware = null);

/// <summary>
/// One of the six fixed dialog rows. Row 0 is always YouTube (signed-in account
/// or a sign-in prompt); rows 1-5 hold validated entries, an empty slot, or — on
/// the free tier — a locked "Premium" slot. Rows are a positional projection of
/// the dialog's working list, so deleting an entry makes the ones above advance up.
/// </summary>
public sealed class SocialSlotViewModel : ViewModelBase
{
    public int Index { get; }
    public bool IsYoutube => Index == 0;

    private SocialService _service = SocialService.Link;
    public SocialService Service
    {
        get => _service;
        set { if (SetProperty(ref _service, value)) OnPropertyChanged(nameof(LogoData)); }
    }

    public string LogoData => Service == SocialService.Fediverse
        ? SocialServiceIcons.LogoDataForFediverse(FediverseSoftware)
        : SocialServiceIcons.LogoDataFor(Service);
    public string LockedIconData => SocialServiceIcons.LockedIconData;
    public string DoNotIconData => SocialServiceIcons.DoNotIconData;

    private bool _isLocked;
    public bool IsLocked
    {
        get => _isLocked;
        set
        {
            if (SetProperty(ref _isLocked, value))
            {
                OnPropertyChanged(nameof(ShowAddButton));
                OnPropertyChanged(nameof(ShowDoNot));
                OnPropertyChanged(nameof(DisplayText));
            }
        }
    }

    private bool _isFilled;
    public bool IsFilled
    {
        get => _isFilled;
        set
        {
            if (SetProperty(ref _isFilled, value))
            {
                OnPropertyChanged(nameof(ShowEditButton));
                OnPropertyChanged(nameof(ShowDeleteButton));
                OnPropertyChanged(nameof(ShowAddButton));
                OnPropertyChanged(nameof(ShowDoNot));
                OnPropertyChanged(nameof(DisplayText));
            }
        }
    }

    private bool _isSignIn;
    public bool IsSignIn
    {
        get => _isSignIn;
        set
        {
            if (SetProperty(ref _isSignIn, value))
            {
                OnPropertyChanged(nameof(ShowSignInButton));
                OnPropertyChanged(nameof(ShowDeleteButton));
                OnPropertyChanged(nameof(ShowLogo));
                OnPropertyChanged(nameof(DisplayText));
            }
        }
    }

    private bool _isEditing;
    public bool IsEditing
    {
        get => _isEditing;
        set
        {
            if (SetProperty(ref _isEditing, value))
            {
                OnPropertyChanged(nameof(ShowEditBox));
                OnPropertyChanged(nameof(ShowDisplay));
                OnPropertyChanged(nameof(ShowEditButton));
                OnPropertyChanged(nameof(ShowDeleteButton));
                OnPropertyChanged(nameof(ShowAddButton));
                OnPropertyChanged(nameof(ShowDoNot));
            }
        }
    }

    private bool _isValidating;
    public bool IsValidating
    {
        get => _isValidating;
        set
        {
            if (SetProperty(ref _isValidating, value))
            {
                OnPropertyChanged(nameof(ShowBusy));
                OnPropertyChanged(nameof(ShowDoNot));
            }
        }
    }

    private string _handle = string.Empty;
    public string Handle
    {
        get => _handle;
        set
        {
            if (SetProperty(ref _handle, value))
                OnPropertyChanged(nameof(DisplayText));
        }
    }

    private string? _fediverseSoftware;
    public string? FediverseSoftware
    {
        get => _fediverseSoftware;
        set
        {
            if (SetProperty(ref _fediverseSoftware, value))
                OnPropertyChanged(nameof(LogoData));
        }
    }

    public string ProfileUrl { get; set; } = string.Empty;

    private string? _error;
    public string? Error
    {
        get => _error;
        set
        {
            if (SetProperty(ref _error, value))
            {
                OnPropertyChanged(nameof(HasError));
                OnPropertyChanged(nameof(ShowError));
                OnPropertyChanged(nameof(ShowDoNot));
            }
        }
    }

    private string _editText = string.Empty;
    public string EditText
    {
        get => _editText;
        set => SetProperty(ref _editText, value);
    }

    /// <summary>The last text submitted for validation (used to skip re-validating
    /// identical input — e.g. a LostFocus firing as the user clicks Cancel).</summary>
    public string? LastValidatedInput { get; set; }

    public string DisplayText =>
        IsYoutube
            ? (IsSignIn ? "Sign in to YouTube" : Handle)
            : IsLocked ? "Unlock with Premium"
            : IsFilled ? Handle
            : "No social yet";

    public bool HasError => !string.IsNullOrEmpty(Error);
    public bool ShowError => HasError;
    public bool ShowLogo => IsYoutube ? !IsSignIn : IsFilled;
    public bool ShowBusy => IsValidating;
    public bool ShowEditBox => IsEditing;
    public bool ShowDisplay => !IsEditing && !IsValidating;
    public bool ShowSignInButton => IsYoutube && IsSignIn && !IsValidating;
    public bool ShowAddButton => !IsYoutube && !IsLocked && !IsFilled && !IsEditing && !IsValidating;
    public bool ShowEditButton => !IsYoutube && IsFilled && !IsEditing && !IsValidating;
    public bool ShowDeleteButton => (IsFilled || IsYoutube) && !IsEditing && !IsValidating;
    public bool ShowDoNot => !IsYoutube && !IsLocked && (!IsFilled || HasError || IsValidating);

    public SocialSlotViewModel(int index) => Index = index;
}