using System;
using System.Collections.Generic;
using Windows.System;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Wino.Core.Domain.Enums;
using Wino.Core.Domain.Interfaces;
using Wino.Core.Domain.Models.Accounts;

namespace Wino.Core.UWP.Dialogs
{
    public sealed partial class NewAccountDialog : ContentDialog
    {
        private Dictionary<SpecialImapProvider, string> helpingLinks = new Dictionary<SpecialImapProvider, string>()
        {
            { SpecialImapProvider.iCloud, "https://support.apple.com/en-us/102654" },
            { SpecialImapProvider.Yahoo, "http://help.yahoo.com/kb/SLN15241.html" },
        };

        public static readonly DependencyProperty IsProviderSelectionVisibleProperty = DependencyProperty.Register(nameof(IsProviderSelectionVisible), typeof(bool), typeof(NewAccountDialog), new PropertyMetadata(true));
        public static readonly DependencyProperty IsSpecialImapServerPartVisibleProperty = DependencyProperty.Register(nameof(IsSpecialImapServerPartVisible), typeof(bool), typeof(NewAccountDialog), new PropertyMetadata(false));
        public static readonly DependencyProperty SelectedMailProviderProperty = DependencyProperty.Register(nameof(SelectedMailProvider), typeof(ProviderDetail), typeof(NewAccountDialog), new PropertyMetadata(null, new PropertyChangedCallback(OnSelectedProviderChanged)));


        /// <summary>
        /// Gets or sets current selected mail provider in the dialog.
        /// </summary>
        public ProviderDetail SelectedMailProvider
        {
            get { return (ProviderDetail)GetValue(SelectedMailProviderProperty); }
            set { SetValue(SelectedMailProviderProperty, value); }
        }


        public bool IsProviderSelectionVisible
        {
            get { return (bool)GetValue(IsProviderSelectionVisibleProperty); }
            set { SetValue(IsProviderSelectionVisibleProperty, value); }
        }

        public bool IsSpecialImapServerPartVisible
        {
            get { return (bool)GetValue(IsSpecialImapServerPartVisibleProperty); }
            set { SetValue(IsSpecialImapServerPartVisibleProperty, value); }
        }

        // List of available mail providers for now.

        public List<IProviderDetail> Providers { get; set; }

        public AccountCreationDialogResult Result = null;

        public NewAccountDialog()
        {
            InitializeComponent();

            // AccountColorPicker.Color = Colors.Blue;
        }

        private static void OnSelectedProviderChanged(DependencyObject obj, DependencyPropertyChangedEventArgs args)
        {
            if (obj is NewAccountDialog dialog)
                dialog.Validate();
        }

        private void CancelClicked(ContentDialog sender, ContentDialogButtonClickEventArgs args)
        {
            Hide();
        }

        private void CreateClicked(ContentDialog sender, ContentDialogButtonClickEventArgs args)
        {
            if (IsSpecialImapServerPartVisible)
            {
                // Special imap detail input.

                var details = new SpecialImapProviderDetails(SpecialImapAddress.Text.Trim(), AppSpecificPassword.Password.Trim(), DisplayNameTextBox.Text.Trim(), SelectedMailProvider.SpecialImapProvider);
                Result = new AccountCreationDialogResult(SelectedMailProvider.Type, AccountNameTextbox.Text.Trim(), details);
                Hide();

                return;
            }

            Validate();

            if (IsSecondaryButtonEnabled)
            {
                if (SelectedMailProvider.SpecialImapProvider != SpecialImapProvider.None)
                {
                    // This step requires app-sepcific password login for some providers.
                    args.Cancel = true;

                    IsProviderSelectionVisible = false;
                    IsSpecialImapServerPartVisible = true;

                    Validate();
                }
                else
                {
                    Result = new AccountCreationDialogResult(SelectedMailProvider.Type, AccountNameTextbox.Text.Trim(), null);
                    Hide();
                }
            }
        }

        private void InputChanged(object sender, TextChangedEventArgs e) => Validate();
        private void SenderNameChanged(object sender, TextChangedEventArgs e) => Validate();

        private void Validate()
        {
            ValidateCreateButton();
            ValidateNames();
        }

        // Returns whether we can create account or not.
        private void ValidateCreateButton()
        {
            bool shouldEnable = SelectedMailProvider != null
                && SelectedMailProvider.IsSupported
                && !string.IsNullOrEmpty(AccountNameTextbox.Text)
                && (IsSpecialImapServerPartVisible ? (!string.IsNullOrEmpty(AppSpecificPassword.Password)
                && !string.IsNullOrEmpty(DisplayNameTextBox.Text)
                && EmailValidation.EmailValidator.Validate(SpecialImapAddress.Text)) : true);

            IsPrimaryButtonEnabled = shouldEnable;
        }

        private void ValidateNames()
        {
            AccountNameTextbox.IsEnabled = SelectedMailProvider != null;
        }

        private void DialogOpened(ContentDialog sender, ContentDialogOpenedEventArgs args) => Validate();

        private void BackClicked(object sender, RoutedEventArgs e)
        {
            IsSpecialImapServerPartVisible = false;
            IsProviderSelectionVisible = true;

            Validate();
        }

        private void ImapPasswordChanged(object sender, RoutedEventArgs e) => Validate();

        private async void AppSpecificHelpButtonClicked(object sender, RoutedEventArgs e)
        {
            var helpUrl = helpingLinks[SelectedMailProvider.SpecialImapProvider];

            await Launcher.LaunchUriAsync(new Uri(helpUrl));
        }
    }
}