@page "/"
@using YaeBlog.Core.Models
@using YaeBlog.Core.Services

@inject BlogOptions BlogOptionsInstance
@inject EssayContentService EssayContentInstance
@inject NavigationManager NavigationManagerInstance

<div style="height: 100%">
    <div class="banner" style="background-image: url('@BlogOptionsInstance.BannerImage')">
        <div class="blog-title">
            <FluentLabel Typo="@Typography.H1" Style="color: white">
                @(BlogOptionsInstance.Author)'s Blog
            </FluentLabel>
        </div>

        <div class="scroll-down">
            <i class="scroll-down-tag"></i>
        </div>
    </div>

    <div style="height: 2rem" id="blog-content"></div>

    <div style="margin: 0 8% 0 8%">
        <FluentGrid>
            <FluentGridItem xs="12" sm="12" md="8" lg="8">
                <div>
                    @foreach (KeyValuePair<string, BlogEssay> essay in _essays)
                    {
                        <FluentCard Style="margin: 2rem 0 2rem 0">
                            <div>
                                <a href="essays/@(essay.Key)" target="_blank">
                                    <FluentLabel Typo="@Typography.H4">
                                        @(essay.Value.Title)
                                    </FluentLabel>
                                </a>

                                <div style="margin: 0.5rem 0 0.5rem 0">
                                    <a href="essays/@(essay.Key)" target="_blank" style="color: #718096;">
                                        <div class="essay-description">
                                            @(essay.Value.Description)
                                        </div>
                                    </a>
                                </div>

                                <FluentStack VerticalAlignment="@VerticalAlignment.Center"
                                             Style="margin: 1rem 0 1rem 0"
                                             HorizontalGap="4">
                                    <FluentIcon Value="@(new Icons.Regular.Size16.Calendar())"/>
                                    <span style="margin: auto 0 auto 0">
                                        @(essay.Value.PublishTime.ToString("yyyy-MM-dd HH:mm:ss"))
                                    </span>
                                    @if (essay.Value.Tags.Count != 0)
                                    {
                                        <FluentIcon Value="@(new Icons.Regular.Size16.TagMultiple())"/>
                                        @foreach (string tag in essay.Value.Tags)
                                        {
                                            <span style="margin: auto 0 auto 0">
                                                @tag
                                            </span>
                                        }
                                    }
                                </FluentStack>
                            </div>
                        </FluentCard>
                    }

                    <div class="pagination">
                        <FluentStack HorizontalAlignment="@HorizontalAlignment.Center"
                                     HorizontalGap="20">
                            @if (Page != 1)
                            {
                                <a href="/?page=@(Page - 1)#blog-content" class="pagination-item">
                                    <i class="chevron-left"></i>
                                </a>
                            }

                            @if (Page == 1)
                            {
                                <a href="/?page=1#blog-content" class="pagination-item">
                                    <span>1</span>
                                </a>
                                <a href="/?page=2#blog-content" class="pagination-item">
                                    <span>2</span>
                                </a>
                                <a href="/?page=3#blog-content" class="pagination-item">
                                    <span>3</span>
                                </a>
                            }
                            else if (Page == _pageCount)
                            {
                                <a href="/?page=@(_pageCount - 2)#blog-content" class="pagination-item">
                                    <span>@(_pageCount - 2)</span>
                                </a>
                                <a href="/?page=@(_pageCount - 1)#blog-content" class="pagination-item">
                                    <span>@(_pageCount - 1)</span>
                                </a>
                                <a href="/?page=@(_pageCount)#blog-content" class="pagination-item">
                                    <span>@(_pageCount)</span>
                                </a>
                            }
                            else
                            {
                                <a href="/?page=@(Page - 1)#blog-content" class="pagination-item">
                                    <span>@(Page - 1)</span>
                                </a>
                                <a href="/?page=@(Page)#blog-content" class="pagination-item">
                                    <span>@(Page)</span>
                                </a>
                                <a href="/?page=@(Page + 1)#blog-content" class="pagination-item">
                                    <span>@(Page + 1)</span>
                                </a>
                            }

                            @if (Page != _pageCount)
                            {
                                <a href="/?page=@(Page + 1)#blog-content" class="pagination-item">
                                    <i class="chevron-right"></i>
                                </a>
                            }
                        </FluentStack>
                    </div>
                </div>
            </FluentGridItem>
            <FluentGridItem xs="12" sm="12" md="4" lg="4">

            </FluentGridItem>
        </FluentGrid>
    </div>

    <BlogFooter/>
</div>


@code {
    [SupplyParameterFromQuery] private int? Page { get; set; }

    private readonly List<KeyValuePair<string, BlogEssay>> _essays = [];
    private int _pageCount;

    protected override void OnInitialized()
    {
        Page ??= 1;

        IEnumerable<KeyValuePair<string, BlogEssay>[]> chunks =
            EssayContentInstance.Essays
                .OrderByDescending(pair => pair.Value.PublishTime)
                .Chunk(10);

        var count = 1;
        var flag = false;
        foreach (KeyValuePair<string, BlogEssay>[] chunk in chunks)
        {
            if (Page == count)
            {
                flag = true;
                _essays.AddRange(chunk);
            }

            count += 1;
        }

        _pageCount = count - 1;

        if (flag is false)
        {
            NavigationManagerInstance.NavigateTo("NotFount");
        }
    }

}