@page "/list"
@using WebSharpRSS.Models
@using SharpRss.Services

@inject IDialogService _dialogService;
@inject RssService _rssService;

<div>
    @if (_isLoading)
        {
            <div class="justify-self: center">
                <MudProgressCircular Color="Color.Primary" Indeterminate="true" />
                <MudText>Loading...</MudText>
            </div>
        }
        else
        {
            <FeedItemList Items="items"/>
        }
</div>

@code {
    [Parameter]
    [SupplyParameterFromQuery(Name = "fid")]
    public string? Fid
    { 
        get => _fid;
        set
        {
            _fid = value;
            LoadItems();
        }
    }
    private string? _fid;
    [Parameter]
    [SupplyParameterFromQuery(Name = "cid")]
    public string? Cid
    {
        get => _cid;
        set
        {
            _cid = value;
            LoadItems();
        }
    }
    private string? _cid;
    HashSet<FeedItemData> items = new HashSet<FeedItemData>();
    bool _isLoading = true;
    private async void LoadItems()
    {
        _isLoading = true;
        if (Fid != null)
        {
            var fItems = await _rssService.GetFeedItemsAsync(Fid);
            items = fItems.Select(x => FeedItemData.FromModel(x)).OrderBy(x => x.PublishingDate).Reverse().ToHashSet();
        }
        else if (Cid != null)
        {
            var feeds = await _rssService.GetFeedsAsync(Cid == string.Empty ? null : Cid);
            var feedIds = feeds.Select(x => x.OriginalUrl);
            var feedItems = await _rssService.GetFeedItemsFromFeedsAsync(feedIds.ToArray());
            items = feedItems.Select(x => FeedItemData.FromModel(x)).OrderBy(x => x.PublishingDate).Reverse().ToHashSet();
        }
        _isLoading = false;
        StateHasChanged();
    }
    protected override void OnInitialized()
    {
        LoadItems();
    }
}