using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Bit.App.Resources;
using Bit.Core.Abstractions;
using Bit.Core.Utilities;
using Xamarin.Forms;

namespace Bit.App.Pages
{
    public partial class ViewPage : BaseContentPage
    {
        private readonly IBroadcasterService _broadcasterService;
        private readonly ISyncService _syncService;
        private ViewPageViewModel _vm;

        public ViewPage(string cipherId)
        {
            InitializeComponent();
            _broadcasterService = ServiceContainer.Resolve<IBroadcasterService>("broadcasterService");
            _syncService = ServiceContainer.Resolve<ISyncService>("syncService");
            _vm = BindingContext as ViewPageViewModel;
            _vm.Page = this;
            _vm.CipherId = cipherId;
            SetActivityIndicator(_mainContent);

            if (Device.RuntimePlatform == Device.iOS)
            {
                _absLayout.Children.Remove(_fab);
                ToolbarItems.Add(_closeItem);
                ToolbarItems.Add(_editItem);
                ToolbarItems.Add(_moreItem);
            }
            else
            {
                _mainLayout.Padding = new Thickness(0, 0, 0, 75);
                ToolbarItems.Add(_attachmentsItem);
                ToolbarItems.Add(_deleteItem);
            }
        }

        public ViewPageViewModel ViewModel => _vm;

        public void UpdateCipherId(string cipherId)
        {
            _vm.CipherId = cipherId;
        }

        protected override async void OnAppearing()
        {
            base.OnAppearing();
            if (_syncService.SyncInProgress)
            {
                IsBusy = true;
            }

            _broadcasterService.Subscribe(nameof(ViewPage), async (message) =>
            {
                if (message.Command == "syncStarted")
                {
                    Device.BeginInvokeOnMainThread(() => IsBusy = true);
                }
                else if (message.Command == "syncCompleted")
                {
                    await Task.Delay(500);
                    Device.BeginInvokeOnMainThread(() =>
                    {
                        IsBusy = false;
                        if (message.Data is Dictionary<string, object> data && data.ContainsKey("successfully"))
                        {
                            var success = data["successfully"] as bool?;
                            if (success.GetValueOrDefault())
                            {
                                var task = _vm.LoadAsync(() => AdjustToolbar());
                            }
                        }
                    });
                }
                else if (message.Command == "selectSaveFileResult")
                {
                    Device.BeginInvokeOnMainThread(() =>
                    {
                        var data = message.Data as Tuple<string, string>;
                        if (data == null)
                        {
                            return;
                        }
                        _vm.SaveFileSelected(data.Item1, data.Item2);
                    });
                }
            });
            await LoadOnAppearedAsync(_scrollView, true, async () =>
            {
                var success = await _vm.LoadAsync(() => AdjustToolbar());
                if (!success)
                {
                    await Navigation.PopModalAsync();
                }
            }, _mainContent);
        }

        protected override void OnDisappearing()
        {
            base.OnDisappearing();
            IsBusy = false;
            _broadcasterService.Unsubscribe(nameof(ViewPage));
            _vm.CleanUp();
        }

        private async void PasswordHistory_Tapped(object sender, System.EventArgs e)
        {
            if (DoOnce())
            {
                await Navigation.PushModalAsync(new NavigationPage(new PasswordHistoryPage(_vm.CipherId)));
            }
        }

        private async void EditToolbarItem_Clicked(object sender, System.EventArgs e)
        {
            if (DoOnce())
            {
                if (_vm.IsDeleted)
                {
                    if (await _vm.RestoreAsync())
                    {
                        await Navigation.PopModalAsync();
                    }
                }
                else
                {
                    if (!await _vm.PromptPasswordAsync())
                    {
                        return;
                    }
                    await Navigation.PushModalAsync(new NavigationPage(new AddEditPage(_vm.CipherId)));
                }
            }
        }

        private void EditButton_Clicked(object sender, System.EventArgs e)
        {
            EditToolbarItem_Clicked(sender, e);
        }

        private async void Attachments_Clicked(object sender, System.EventArgs e)
        {
            if (DoOnce())
            {
                if (!await _vm.PromptPasswordAsync())
                {
                    return;
                }
                var page = new AttachmentsPage(_vm.CipherId);
                await Navigation.PushModalAsync(new NavigationPage(page));
            }
        }

        private async void Share_Clicked(object sender, System.EventArgs e)
        {
            if (DoOnce())
            {
                if (!await _vm.PromptPasswordAsync())
                {
                    return;
                }
                var page = new SharePage(_vm.CipherId);
                await Navigation.PushModalAsync(new NavigationPage(page));
            }
        }

        private async void Delete_Clicked(object sender, System.EventArgs e)
        {
            if (DoOnce())
            {
                if (!await _vm.PromptPasswordAsync())
                {
                    return;
                }
                if (await _vm.DeleteAsync())
                {
                    await Navigation.PopModalAsync();
                }
            }
        }

        private async void Collections_Clicked(object sender, System.EventArgs e)
        {
            if (DoOnce())
            {
                if (!await _vm.PromptPasswordAsync())
                {
                    return;
                }
                var page = new CollectionsPage(_vm.CipherId);
                await Navigation.PushModalAsync(new NavigationPage(page));
            }
        }

        private async void Clone_Clicked(object sender, System.EventArgs e)
        {
            if (DoOnce())
            {
                if (!await _vm.PromptPasswordAsync())
                {
                    return;
                }
                var page = new AddEditPage(_vm.CipherId, cloneMode: true, viewPage: this);
                await Navigation.PushModalAsync(new NavigationPage(page));
            }
        }

        private async void More_Clicked(object sender, System.EventArgs e)
        {
            if (!DoOnce())
            {
                return;
            }

            var options = new List<string> { AppResources.Attachments };
            if (_vm.Cipher.OrganizationId == null)
            {
                options.Add(AppResources.Clone);
                options.Add(AppResources.MoveToOrganization);
            }
            else
            {
                options.Add(AppResources.Collections);
            }

            var selection = await DisplayActionSheet(AppResources.Options, AppResources.Cancel,
                AppResources.Delete, options.ToArray());

            if (!await _vm.PromptPasswordAsync())
            {
                return;
            }

            if (selection == AppResources.Delete)
            {
                if (await _vm.DeleteAsync())
                {
                    await Navigation.PopModalAsync();
                }
            }
            else if (selection == AppResources.Attachments)
            {
                var page = new AttachmentsPage(_vm.CipherId);
                await Navigation.PushModalAsync(new NavigationPage(page));
            }
            else if (selection == AppResources.Collections)
            {
                var page = new CollectionsPage(_vm.CipherId);
                await Navigation.PushModalAsync(new NavigationPage(page));
            }
            else if (selection == AppResources.MoveToOrganization)
            {
                var page = new SharePage(_vm.CipherId);
                await Navigation.PushModalAsync(new NavigationPage(page));
            }
            else if (selection == AppResources.Clone)
            {
                var page = new AddEditPage(_vm.CipherId, cloneMode: true, viewPage: this);
                await Navigation.PushModalAsync(new NavigationPage(page));
            }
        }

        private async void Close_Clicked(object sender, System.EventArgs e)
        {
            if (DoOnce())
            {
                await Navigation.PopModalAsync();
            }
        }

        private void AdjustToolbar()
        {
            if (_vm.Cipher == null)
            {
                return;
            }
            _editItem.Text = _vm.Cipher.IsDeleted ? AppResources.Restore :
                AppResources.Edit;
            if (_vm.Cipher.IsDeleted)
            {
                _absLayout.Children.Remove(_fab);
            }
            if (Device.RuntimePlatform != Device.Android)
            {
                return;
            }
            if (_vm.Cipher.OrganizationId == null)
            {
                if (ToolbarItems.Contains(_collectionsItem))
                {
                    ToolbarItems.Remove(_collectionsItem);
                }
                if (!ToolbarItems.Contains(_cloneItem))
                {
                    ToolbarItems.Insert(1, _cloneItem);
                }
                if (!ToolbarItems.Contains(_shareItem))
                {
                    ToolbarItems.Insert(2, _shareItem);
                }
            }
            else
            {
                if (ToolbarItems.Contains(_cloneItem))
                {
                    ToolbarItems.Remove(_cloneItem);
                }
                if (ToolbarItems.Contains(_shareItem))
                {
                    ToolbarItems.Remove(_shareItem);
                }
                if (!ToolbarItems.Contains(_collectionsItem))
                {
                    ToolbarItems.Insert(1, _collectionsItem);
                }
            }
            if (_vm.Cipher.IsDeleted && !ToolbarItems.Contains(_editItem))
            {
                ToolbarItems.Insert(1, _editItem);
            }
        }
    }
}