@page "/media/browser/images"
@using System.Net
@using ErsatzTV.Application.Images
@implements IDisposable
@inject IDialogService Dialog
@inject IMediator Mediator

<MudForm Style="max-height: 100%">
    <div class="d-flex flex-column" style="height: 100vh; overflow-x: auto">
        <MudContainer MaxWidth="MaxWidth.ExtraLarge" Class="pt-8">
            <MudText Typo="Typo.h5" Class="mb-2">Images</MudText>
            <MudDivider Class="mb-6"/>
            <MudCard>
                <MudTreeView T="ImageTreeItemViewModel" ServerData="LoadServerData" Items="@TreeItems" Hover="true" ExpandOnClick="true">
                    <ItemTemplate Context="item">
                        <MudTreeViewItem T="ImageTreeItemViewModel" Items="@item.Value!.TreeItems" Icon="@item.Value.Icon" CanExpand="@item.Value.CanExpand" Value="@item.Value">
                            <BodyContent>
                                <div style="display: flex; align-items: center; width: 100%">
                                    <div style="justify-self: start; flex: 1">
                                        <MudText>@item.Value.Text</MudText>
                                    </div>
                                    <div style="display: flex; align-items: center; justify-self: end;">
                                        <span class="d-none d-sm-flex">@item.Value.EndText</span>
                                        <MudTooltip Text="Edit Image Folder Duration" ShowOnHover="true" ShowOnClick="false" ShowOnFocus="false">
                                            <MudIconButton Icon="@Icons.Material.Filled.Edit"
                                                           OnClick="@(_ => EditImageFolderDuration(item.Value))">
                                            </MudIconButton>
                                        </MudTooltip>
                                        @{
                                            string query = GetSearchQuery(item.Value);
                                            if (!string.IsNullOrWhiteSpace(query))
                                            {
                                                <MudIconButton
                                                    Class="d-none d-sm-flex"
                                                    Icon="@Icons.Material.Filled.Search"
                                                    Href="@($"search?query={query}")"/>
                                            }
                                        }
                                    </div>
                                </div>
                            </BodyContent>
                        </MudTreeViewItem>
                    </ItemTemplate>
                </MudTreeView>
            </MudCard>
        </MudContainer>
    </div>
</MudForm>

@code {
    private CancellationTokenSource _cts;
    private List<TreeItemData<ImageTreeItemViewModel>> TreeItems { get; set; } = [];

    public void Dispose()
    {
        _cts?.Cancel();
        _cts?.Dispose();
    }

    protected override async Task OnParametersSetAsync()
    {
        _cts?.Cancel();
        _cts?.Dispose();
        _cts = new CancellationTokenSource();
        var token = _cts.Token;

        try
        {
            List<ImageFolderViewModel> imageFolders = await Mediator.Send(new GetImageFolders(Option<int>.None), token);
            TreeItems = imageFolders.Map(g => new TreeItemData<ImageTreeItemViewModel> { Value = new ImageTreeItemViewModel(g) }).ToList();
        }
        catch (OperationCanceledException)
        {
            // do nothing
        }
    }

    private async Task<IReadOnlyCollection<TreeItemData<ImageTreeItemViewModel>>> LoadServerData(ImageTreeItemViewModel parentNode)
    {
        List<ImageFolderViewModel> result = await Mediator.Send(new GetImageFolders(parentNode.LibraryFolderId), _cts.Token);
        foreach (ImageFolderViewModel imageFolder in result)
        {
            parentNode.TreeItems.Add(new TreeItemData<ImageTreeItemViewModel> { Value = new ImageTreeItemViewModel(imageFolder) });
        }

        return parentNode.TreeItems;
    }

    private static string GetSearchQuery(ImageTreeItemViewModel item)
    {
        var query = $"library_folder_id:{item.LibraryFolderId}";
        return WebUtility.UrlEncode(query);
    }

    private async Task EditImageFolderDuration(ImageTreeItemViewModel item)
    {
        var parameters = new DialogParameters { { "ImageFolderDuration", item.ImageFolderDuration } };
        var options = new DialogOptions { CloseButton = true, MaxWidth = MaxWidth.ExtraLarge };

        IDialogReference dialog = await Dialog.ShowAsync<EditImageFolderDurationDialog>("Edit Image Folder Duration", parameters, options);
        DialogResult result = await dialog.Result;
        if (result is { Canceled: false })
        {
            double? duration = await Mediator.Send(new UpdateImageFolderDuration(item.LibraryFolderId, result.Data as double?), _cts.Token);
            item.UpdateDuration(duration);
            await InvokeAsync(StateHasChanged);
        }
    }

}