using System;
using System.Collections.Generic;
using CommunityToolkit.Mvvm.Messaging;
using CommunityToolkit.WinUI;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;
using Wino.Core.Domain;
using Wino.Core.Domain.Entities.Shared;
using Wino.Core.Domain.Models.Accounts;
using Wino.Core.Domain.Models.AutoDiscovery;
using Wino.Messaging.Client.Mails;


namespace Wino.Views.ImapSetup;

public sealed partial class AdvancedImapSetupPage : Page
{
    public static readonly DependencyProperty UseSameCredentialsForSendingProperty = DependencyProperty.Register(nameof(UseSameCredentialsForSending), typeof(bool), typeof(AdvancedImapSetupPage), new PropertyMetadata(true, OnUseSameCredentialsForSendingChanged));
    public static readonly DependencyProperty ValidationErrorsProperty = DependencyProperty.Register(nameof(ValidationErrors), typeof(List<string>), typeof(AdvancedImapSetupPage), new PropertyMetadata(new List<string>()));

    public List<ImapAuthenticationMethodModel> AvailableAuthenticationMethods { get; } = new List<ImapAuthenticationMethodModel>()
    {
        new ImapAuthenticationMethodModel(Core.Domain.Enums.ImapAuthenticationMethod.Auto, Translator.ImapAuthenticationMethod_Auto),
        new ImapAuthenticationMethodModel(Core.Domain.Enums.ImapAuthenticationMethod.None, Translator.ImapAuthenticationMethod_None),
        new ImapAuthenticationMethodModel(Core.Domain.Enums.ImapAuthenticationMethod.NormalPassword, Translator.ImapAuthenticationMethod_Plain),
        new ImapAuthenticationMethodModel(Core.Domain.Enums.ImapAuthenticationMethod.EncryptedPassword, Translator.ImapAuthenticationMethod_EncryptedPassword),
        new ImapAuthenticationMethodModel(Core.Domain.Enums.ImapAuthenticationMethod.Ntlm, Translator.ImapAuthenticationMethod_Ntlm),
        new ImapAuthenticationMethodModel(Core.Domain.Enums.ImapAuthenticationMethod.CramMd5, Translator.ImapAuthenticationMethod_CramMD5),
        new ImapAuthenticationMethodModel(Core.Domain.Enums.ImapAuthenticationMethod.DigestMd5, Translator.ImapAuthenticationMethod_DigestMD5)
    };

    public List<ImapConnectionSecurityModel> AvailableConnectionSecurities { get; set; } = new List<ImapConnectionSecurityModel>()
    {
        new ImapConnectionSecurityModel(Core.Domain.Enums.ImapConnectionSecurity.Auto, Translator.ImapConnectionSecurity_Auto),
        new ImapConnectionSecurityModel(Core.Domain.Enums.ImapConnectionSecurity.SslTls, Translator.ImapConnectionSecurity_SslTls),
        new ImapConnectionSecurityModel(Core.Domain.Enums.ImapConnectionSecurity.StartTls, Translator.ImapConnectionSecurity_StartTls),
        new ImapConnectionSecurityModel(Core.Domain.Enums.ImapConnectionSecurity.None, Translator.ImapConnectionSecurity_None)
    };

    public bool UseSameCredentialsForSending
    {
        get { return (bool)GetValue(UseSameCredentialsForSendingProperty); }
        set { SetValue(UseSameCredentialsForSendingProperty, value); }
    }

    public List<string> ValidationErrors
    {
        get { return (List<string>)GetValue(ValidationErrorsProperty); }
        set { SetValue(ValidationErrorsProperty, value); }
    }

    [GeneratedDependencyProperty]
    public partial bool HasValidationErrors { get; set; }

    public AdvancedImapSetupPage()
    {
        InitializeComponent();

        NavigationCacheMode = NavigationCacheMode.Enabled;
    }

    private static void OnUseSameCredentialsForSendingChanged(DependencyObject obj, DependencyPropertyChangedEventArgs args)
    {
        if (obj is AdvancedImapSetupPage page)
        {
            page.UpdateOutgoingAuthenticationPanel();
        }
    }

    private void UpdateOutgoingAuthenticationPanel()
    {
        if (UseSameCredentialsForSending)
        {
            OutgoingUsernameBox.Text = UsernameBox.Text;
            OutgoingPasswordBox.Password = PasswordBox.Password;
        }
        else
        {
            OutgoingUsernameBox.Text = string.Empty;
            OutgoingPasswordBox.Password = string.Empty;
        }
    }

    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);

        // Don't override settings on back scenarios.
        // User is trying to try again the same configuration.

        if (e.NavigationMode == NavigationMode.Back) return;

        // Connection is succesfull but error occurred.
        // Imap and Smptp settings exists here at this point.

        if (e.Parameter is AutoDiscoverySettings preDefinedSettings && preDefinedSettings.UserMinimalSettings != null)
        {
            // TODO: Auto discovery settings adjustments.

            UsernameBox.Text = preDefinedSettings.UserMinimalSettings.Email;
            AddressBox.Text = preDefinedSettings.UserMinimalSettings.Email;
            DisplayNameBox.Text = preDefinedSettings.UserMinimalSettings.DisplayName;
            PasswordBox.Password = preDefinedSettings.UserMinimalSettings.Password;

            var serverInfo = preDefinedSettings.ToServerInformation();

            IncomingServerBox.Text = serverInfo.IncomingServer;
            IncomingServerPortBox.Text = serverInfo.IncomingServerPort;

            OutgoingPasswordBox.Password = serverInfo.OutgoingServerPassword;
            OutgoingServerPort.Text = serverInfo.OutgoingServerPort;
            OutgoingUsernameBox.Text = serverInfo.OutgoingServerUsername;

            UseSameCredentialsForSending = OutgoingUsernameBox.Text == UsernameBox.Text;
        }
        else if (e.Parameter is AutoDiscoveryMinimalSettings autoDiscoveryMinimalSettings)
        {
            // Auto discovery failed. Only minimal settings are passed.

            UsernameBox.Text = autoDiscoveryMinimalSettings.Email;
            AddressBox.Text = autoDiscoveryMinimalSettings.Email;
            DisplayNameBox.Text = autoDiscoveryMinimalSettings.DisplayName;
            PasswordBox.Password = autoDiscoveryMinimalSettings.Password;
        }
    }

    private void CancelClicked(object sender, RoutedEventArgs e) => WeakReferenceMessenger.Default.Send(new ImapSetupDismissRequested(null));

    private string GetServerWithoutPort(string server)
    {
        var splitted = server.Split(':');

        if (splitted.Length > 1)
        {
            return splitted[0];
        }

        return server;
    }

    private void SignInClicked(object sender, RoutedEventArgs e)
    {
        var errors = new List<string>();

        // Validate email and display name
        if (string.IsNullOrWhiteSpace(AddressBox.Text))
            errors.Add(Translator.IMAPAdvancedSetupDialog_ValidationEmailRequired);
        else if (!EmailValidation.EmailValidator.Validate(AddressBox.Text))
            errors.Add(Translator.IMAPAdvancedSetupDialog_ValidationEmailInvalid);

        if (string.IsNullOrWhiteSpace(DisplayNameBox.Text))
            errors.Add(Translator.IMAPAdvancedSetupDialog_ValidationDisplayNameRequired);

        // Validate incoming server details
        if (string.IsNullOrWhiteSpace(IncomingServerBox.Text))
            errors.Add(Translator.IMAPAdvancedSetupDialog_ValidationIncomingServerRequired);
        if (string.IsNullOrWhiteSpace(IncomingServerPortBox.Text))
            errors.Add(Translator.IMAPAdvancedSetupDialog_ValidationIncomingPortRequired);
        else if (!int.TryParse(IncomingServerPortBox.Text, out int inPort) || inPort <= 0 || inPort > 65535)
            errors.Add(Translator.IMAPAdvancedSetupDialog_ValidationIncomingPortInvalid);

        // Validate outgoing server details  
        if (string.IsNullOrWhiteSpace(OutgoingServerBox.Text))
            errors.Add(Translator.IMAPAdvancedSetupDialog_ValidationOutgoingServerRequired);
        if (string.IsNullOrWhiteSpace(OutgoingServerPort.Text))
            errors.Add(Translator.IMAPAdvancedSetupDialog_ValidationOutgoingPortRequired);
        else if (!int.TryParse(OutgoingServerPort.Text, out int outPort) || outPort <= 0 || outPort > 65535)
            errors.Add(Translator.IMAPAdvancedSetupDialog_ValidationOutgoingPortInvalid);

        // Validate authentication details
        if (string.IsNullOrWhiteSpace(UsernameBox.Text))
            errors.Add(Translator.IMAPAdvancedSetupDialog_ValidationUsernameRequired);
        if (string.IsNullOrWhiteSpace(PasswordBox.Password))
            errors.Add(Translator.IMAPAdvancedSetupDialog_ValidationPasswordRequired);

        // Validate outgoing credentials if not using same as incoming
        if (!UseSameCredentialsForSending)
        {
            if (string.IsNullOrWhiteSpace(OutgoingUsernameBox.Text))
                errors.Add(Translator.IMAPAdvancedSetupDialog_ValidationOutgoingUsernameRequired);
            if (string.IsNullOrWhiteSpace(OutgoingPasswordBox.Password))
                errors.Add(Translator.IMAPAdvancedSetupDialog_ValidationOutgoingPasswordRequired);
        }

        // Show validation errors if any
        HasValidationErrors = errors.Count > 0;

        if (HasValidationErrors)
        {
            ValidationErrors = errors;
            return;
        }

        var info = new CustomServerInformation()
        {
            IncomingServer = GetServerWithoutPort(IncomingServerBox.Text),
            Id = Guid.NewGuid(),

            IncomingServerPassword = PasswordBox.Password,
            IncomingServerType = Core.Domain.Enums.CustomIncomingServerType.IMAP4,
            IncomingServerUsername = UsernameBox.Text,
            IncomingAuthenticationMethod = (IncomingAuthenticationMethod.SelectedItem as ImapAuthenticationMethodModel).ImapAuthenticationMethod,
            IncomingServerSocketOption = (IncomingConnectionSecurity.SelectedItem as ImapConnectionSecurityModel).ImapConnectionSecurity,
            IncomingServerPort = IncomingServerPortBox.Text,

            OutgoingServer = GetServerWithoutPort(OutgoingServerBox.Text),
            OutgoingServerPort = OutgoingServerPort.Text,
            OutgoingServerPassword = OutgoingPasswordBox.Password,
            OutgoingAuthenticationMethod = (OutgoingAuthenticationMethod.SelectedItem as ImapAuthenticationMethodModel).ImapAuthenticationMethod,
            OutgoingServerSocketOption = (OutgoingConnectionSecurity.SelectedItem as ImapConnectionSecurityModel).ImapConnectionSecurity,
            OutgoingServerUsername = OutgoingUsernameBox.Text,

            ProxyServer = ProxyServerBox.Text,
            ProxyServerPort = ProxyServerPortBox.Text,
            Address = AddressBox.Text,
            DisplayName = DisplayNameBox.Text,
            MaxConcurrentClients = 5
        };

        if (UseSameCredentialsForSending)
        {
            info.OutgoingServerUsername = info.IncomingServerUsername;
            info.OutgoingServerPassword = info.IncomingServerPassword;
        }
        else
        {
            info.OutgoingServerUsername = OutgoingUsernameBox.Text;
            info.OutgoingServerPassword = OutgoingPasswordBox.Password;
        }

        WeakReferenceMessenger.Default.Send(new ImapSetupNavigationRequested(typeof(TestingImapConnectionPage), info));
    }

    private void IncomingServerChanged(object sender, TextChangedEventArgs e)
    {
        if (sender is TextBox senderTextBox)
        {
            var splitted = senderTextBox.Text.Split(':');

            if (splitted.Length > 1)
            {
                IncomingServerPortBox.Text = splitted[splitted.Length - 1];
            }
        }
    }

    private void OutgoingServerChanged(object sender, TextChangedEventArgs e)
    {
        if (sender is TextBox senderTextBox)
        {
            var splitted = senderTextBox.Text.Split(':');

            if (splitted.Length > 1)
            {
                OutgoingServerPort.Text = splitted[splitted.Length - 1];
            }
        }
    }

    private void IncomingUsernameChanged(object sender, TextChangedEventArgs e)
    {
        if (UseSameCredentialsForSending)
        {
            OutgoingUsernameBox.Text = UsernameBox.Text;
        }
    }

    private void IncomingPasswordChanged(object sender, RoutedEventArgs e)
    {
        if (UseSameCredentialsForSending)
        {
            OutgoingPasswordBox.Password = PasswordBox.Password;
        }
    }

    private void ValidationsGoBackClicked(object sender, RoutedEventArgs e)
    {
        ValidationErrors.Clear();
        HasValidationErrors = false;
    }
}