@page "/media/movies"
@page "/media/movies/page/{PageNumber:int}"
@using LanguageExt.UnsafeValueAccess
@using Microsoft.AspNetCore.WebUtilities
@using Microsoft.Extensions.Primitives
@using ErsatzTV.Application.MediaCards
@using ErsatzTV.Application.MediaCollections
@using ErsatzTV.Application.MediaCollections.Commands
@using ErsatzTV.Application.Search.Queries
@using Unit = LanguageExt.Unit
@inherits MultiSelectBase<MovieList>
@inject NavigationManager _navigationManager
@inject ChannelWriter<IBackgroundServiceRequest> _channel

<MudPaper Square="true" Style="display: flex; height: 64px; left: 240px; padding: 0; position: fixed; right: 0; z-index: 100;">
    <div style="display: flex; flex-direction: row; margin-bottom: auto; margin-top: auto; width: 100%" class="ml-6 mr-6">
        @if (IsSelectMode())
        {
            <MudText Typo="Typo.h6" Color="Color.Primary">@SelectionLabel()</MudText>
            <div style="margin-left: auto">
                <MudButton Variant="Variant.Filled"
                           Color="Color.Primary"
                           StartIcon="@Icons.Material.Filled.Add"
                           OnClick="@(_ => AddSelectionToCollection())">
                    Add To Collection
                </MudButton>
                <MudButton Class="ml-3"
                           Variant="Variant.Filled"
                           Color="Color.Secondary"
                           StartIcon="@Icons.Material.Filled.Check"
                           OnClick="@(_ => ClearSelection())">
                    Clear Selection
                </MudButton>
            </div>
        }
        else
        {
            <MudText Style="margin-bottom: auto; margin-top: auto; width: 33%">@_query</MudText>
            <div style="max-width: 300px; width: 33%;">
                <MudPaper Style="align-items: center; display: flex; justify-content: center;">
                    <MudIconButton Icon="@Icons.Material.Outlined.ChevronLeft"
                                   OnClick="@PrevPage"
                                   Disabled="@(PageNumber <= 1)">
                    </MudIconButton>
                    <MudText Style="flex-grow: 1"
                             Align="Align.Center">
                        @Math.Min((PageNumber - 1) * PageSize + 1, _data.Count)-@Math.Min(_data.Count, PageNumber * PageSize) of @_data.Count
                    </MudText>
                    <MudIconButton Icon="@Icons.Material.Outlined.ChevronRight"
                                   OnClick="@NextPage" Disabled="@(PageNumber * PageSize >= _data.Count)">
                    </MudIconButton>
                </MudPaper>
            </div>
        }
    </div>
</MudPaper>
<MudContainer MaxWidth="MaxWidth.ExtraLarge" Class="pt-8" Style="margin-top: 64px">
    <MudContainer MaxWidth="MaxWidth.False" Class="media-card-grid">
        <FragmentLetterAnchor TCard="MovieCardViewModel" Cards="@_data.Cards">
            <MediaCard Data="@context"
                       Link="@($"/media/movies/{context.MovieId}")"
                       AddToCollectionClicked="@AddToCollection"
                       SelectClicked="@(e => SelectClicked(context, e))"
                       IsSelected="@IsSelected(context)"
                       IsSelectMode="@IsSelectMode()"/>
        </FragmentLetterAnchor>
    </MudContainer>
</MudContainer>
@if (_data.PageMap.IsSome)
{
    <LetterBar PageMap="@_data.PageMap.ValueUnsafe()"
               BaseUri="/media/movies"
               Query="@_query"/>
}

@code {
    private static int PageSize => 100;

    [Parameter]
    public int PageNumber { get; set; }

    private MovieCardResultsViewModel _data;
    private string _query;

    protected override Task OnParametersSetAsync()
    {
        if (PageNumber == 0)
        {
            PageNumber = 1;
        }

        string query = new Uri(_navigationManager.Uri).Query;
        if (QueryHelpers.ParseQuery(query).TryGetValue("query", out StringValues value))
        {
            _query = value;
        }
        else
        {
            _query = null;
        }

        return RefreshData();
    }

    protected override async Task RefreshData()
    {
        string searchQuery = string.IsNullOrWhiteSpace(_query) ? "type:movie" : $"type:movie AND ({_query})";
        _data = await Mediator.Send(new QuerySearchIndexMovies(searchQuery, PageNumber, PageSize));
    }

    private void PrevPage()
    {
        var uri = $"/media/movies/page/{PageNumber - 1}";
        if (!string.IsNullOrWhiteSpace(_query))
        {
            uri = QueryHelpers.AddQueryString(uri, "query", _query);
        }
        _navigationManager.NavigateTo(uri);
    }

    private void NextPage()
    {
        var uri = $"/media/movies/page/{PageNumber + 1}";
        if (!string.IsNullOrWhiteSpace(_query))
        {
            uri = QueryHelpers.AddQueryString(uri, "query", _query);
        }
        _navigationManager.NavigateTo(uri);
    }

    private void SelectClicked(MediaCardViewModel card, MouseEventArgs e)
    {
        List<MediaCardViewModel> GetSortedItems()
        {
            return _data.Cards.OrderBy(m => m.SortTitle).ToList<MediaCardViewModel>();
        }

        SelectClicked(GetSortedItems, card, e);
    }

    private async Task AddToCollection(MediaCardViewModel card)
    {
        if (card is MovieCardViewModel movie)
        {
            var parameters = new DialogParameters { { "EntityType", "movie" }, { "EntityName", movie.Title } };
            var options = new DialogOptions { CloseButton = true, MaxWidth = MaxWidth.ExtraSmall };

            IDialogReference dialog = Dialog.Show<AddToCollectionDialog>("Add To Collection", parameters, options);
            DialogResult result = await dialog.Result;
            if (!result.Cancelled && result.Data is MediaCollectionViewModel collection)
            {
                var request = new AddMovieToCollection(collection.Id, movie.MovieId);
                Either<BaseError, Unit> addResult = await Mediator.Send(request);
                addResult.Match(
                    Left: error =>
                    {
                        Snackbar.Add($"Unexpected error adding movie to collection: {error.Value}");
                        Logger.LogError("Unexpected error adding movie to collection: {Error}", error.Value);
                    },
                    Right: _ => Snackbar.Add($"Added {movie.Title} to collection {collection.Name}", Severity.Success));
            }
        }
    }

}