@page "/"
@using CodeHollow.FeedReader;
@using SharpRss.Models;
@using WebSharpRSS.Models;
@using SharpRss.Services

@inject FeedStateContainer _stateContainer;

<MudStack Spacing="2" Class="ml-2 mr-2">
    @foreach (var feedItemData in _itemDatas)
    {
        <MudItem>
            <MudCard>
                <MudCardContent>
                    <div style="justify-self: start;" class="d-flex align-center">
                        @if (feedItemData.Icon != null)
                        {
                            <MudIcon Icon="@feedItemData.Icon" Style="@($"color:{feedItemData.CategoryColorHex}")" />
                        }
                        @if (feedItemData.FaviconUrl != null)
                        {
                            <MudImage Src="@feedItemData.FaviconUrl" ObjectFit="ObjectFit.Contain" />
                        }
                        <MudText Class="d-inline pa-2 align-center">@feedItemData.FeedItem.Title</MudText>
                    </div>
                    <MudText Typo="Typo.body2">@feedItemData.FeedItem.Description</MudText>
                    <MudText Typo="Typo.overline">@feedItemData.FeedItem.PublishingDate.ToString()</MudText>
                </MudCardContent>
            </MudCard>
        </MudItem>
    }
</MudStack>

@code {
    protected override void OnInitialized()
    {
        UpdateFeeds();
        _stateContainer.StateChanged += FeedsChanged;
    }
    private void FeedsChanged()
    {
        UpdateFeeds();
        InvokeAsync(StateHasChanged);
    }
    private HashSet<FeedItemData> _itemDatas = new HashSet<FeedItemData>();
    private TreeItemData? _treeItemData;
    private void UpdateFeeds()
    {
        if (_stateContainer.TreeItem == null) return;
        _treeItemData = _stateContainer.TreeItem;
        if (_treeItemData.Feed != null)
        {
            Feed feed = _treeItemData.Feed;
            _itemDatas = feed.Items.Select(x => new FeedItemData(x) { Icon = _treeItemData.Icon, FaviconUrl = _treeItemData.FaviconUrl, CategoryColorHex = _treeItemData.CategoryModel?.HexColor }).ToHashSet();
        }
        else if (_treeItemData.Feeds != null)
        {
            HashSet<FeedItemData> items = new HashSet<FeedItemData>();
            foreach (var treeItem in _treeItemData.Feeds)
            {
                if (treeItem.Feed == null) continue;
                items.UnionWith(treeItem.Feed.Items.Select(x => new FeedItemData(x) { Icon = treeItem.Icon, FaviconUrl = treeItem.FaviconUrl, CategoryColorHex = _treeItemData.CategoryModel?.HexColor }));
                _itemDatas = items.OrderBy(x => x.FeedItem.PublishingDate).Reverse().ToHashSet();
            }
        }
    }
}