@page "/blog/{year:int}/{month:int}/{day:int}/{slug}"
@using Humanizer
@using Markdig
@using Microsoft.AspNetCore.Mvc.TagHelpers
@using OliverBooth.Common.Data
@using OliverBooth.Common.Data.Blog
@using OliverBooth.Common.Services
@inject IBlogPostService BlogPostService
@inject MarkdownPipeline MarkdownPipeline
@model Article

@if (Model.ShowPasswordPrompt)
{
    <div class="callout" data-callout="danger">
        This post is private and can only be viewed by those with the password.
    </div>

    <form method="post">
        <div class="mb-3">
            <label for="password" class="form-label">Password</label>
            <input type="password" class="form-control" id="password" name="password" required>
        </div>
        <button type="submit" class="btn btn-primary">Submit</button>
    </form>
    return;
}

@if (Model.Post is not { } post)
{
    return;
}

@{
    ViewData["Post"] = post;
    ViewData["Title"] = post.Title;
    IBlogAuthor author = post.Author;
    DateTimeOffset published = post.Published;
}

<nav style="--bs-breadcrumb-divider: '>';" aria-label="breadcrumb">
    <ol class="breadcrumb">
        <li class="breadcrumb-item">
            <a asp-page="Index">Blog</a>
        </li>
        <li class="breadcrumb-item active" aria-current="page">@post.Title</li>
    </ol>
</nav>

@switch (post.Visibility)
{
    case Visibility.Private:
        <div class="callout" data-callout="danger">
            This post is private and can only be viewed by those with the password.
        </div>
        break;

    case Visibility.Unlisted:
        <div class="callout" data-callout="warning">
            This post is unlisted and can only be viewed by those with the link.
        </div>
        break;
}

<h1>@post.Title</h1>
<p class="text-muted">
    <img class="blog-author-icon" src="@author.AvatarUrl" alt="@author.DisplayName">
    @author.DisplayName &bull;

    <abbr data-bs-toggle="tooltip" data-bs-title="@published.ToString("dddd, d MMMM yyyy HH:mm")">
        Published @published.Humanize()
    </abbr>

    @if (post.Updated is { } updated)
    {
        <span>&bull;</span>
        <abbr data-bs-toggle="tooltip" data-bs-title="@updated.ToString("dddd, d MMMM yyyy HH:mm")">
            Updated @updated.Humanize()
        </abbr>
    }
</p>
<div class="post-tags">
    @foreach (string tag in post.Tags)
    {
        <a asp-page="Index" asp-route-tag="@tag" class="badge bg-secondary">@tag</a>
    }
</div>
<hr>

<article>
    @Html.Raw(BlogPostService.RenderPost(post))
</article>

<hr>

<div class="row">
    <div class="col-sm-12 col-md-6">
        @if (BlogPostService.GetPreviousPost(post) is { } previousPost)
        {
            <small>Previous Post</small>
            <p class="lead">
                <a asp-page="Article"
                   asp-route-year="@previousPost.Published.Year.ToString("0000")"
                   asp-route-month="@previousPost.Published.Month.ToString("00")"
                   asp-route-day="@previousPost.Published.Day.ToString("00")"
                   asp-route-slug="@previousPost.Slug">
                    @previousPost.Title
                </a>
            </p>
        }
    </div>
    <div class="col-sm-12 col-md-6" style="text-align: right;">
        @if (BlogPostService.GetNextPost(post) is { } nextPost)
        {
            <small>Next Post</small>
            <p class="lead">
                <a asp-page="Article"
                   asp-route-year="@nextPost.Published.Year.ToString("0000")"
                   asp-route-month="@nextPost.Published.Month.ToString("00")"
                   asp-route-day="@nextPost.Published.Day.ToString("00")"
                   asp-route-slug="@nextPost.Slug">
                    @nextPost.Title
                </a>
            </p>
        }
    </div>
</div>

<hr>

@if (post.EnableComments)
{
    <div class="giscus"></div>
    @section Scripts
    {
        <script src="https://giscus.app/client.js"
                data-repo="oliverbooth/oliverbooth.dev"
                data-repo-id="MDEwOlJlcG9zaXRvcnkyNDUxODEyNDI="
                data-category="Comments"
                data-category-id="DIC_kwDODp0rOs4Ce_Nj"
                data-mapping="pathname"
                data-strict="0"
                data-reactions-enabled="1"
                data-emit-metadata="0"
                data-input-position="bottom"
                data-theme="preferred_color_scheme"
                data-lang="en"
                crossorigin="anonymous"
                async>
</script>
    }

    int commentCount = BlogPostService.GetLegacyCommentCount(post);
    if (commentCount > 0)
    {
        <hr>

        var nestLevelMap = new Dictionary<ILegacyComment, int>();
        IReadOnlyList<ILegacyComment> legacyComments = BlogPostService.GetLegacyComments(post);
        var commentStack = new Stack<ILegacyComment>(legacyComments.OrderByDescending(c => c.CreatedAt));
        <p class="text-center">
            <strong>@("legacy comment".ToQuantity(commentCount))</strong>
        </p>
        <p class="text-center">
            <sub>Legacy comments are comments that were posted using a commenting system that I no longer use. This exists for posterity.</sub>
        </p>

        while (commentStack.Count > 0)
        {
            ILegacyComment comment = commentStack.Pop();
            foreach (ILegacyComment reply in BlogPostService.GetLegacyReplies(comment).OrderByDescending(c => c.CreatedAt))
            {
                if (nestLevelMap.TryGetValue(comment, out int currentLevel))
                {
                    nestLevelMap[reply] = currentLevel + 1;
                }
                else
                {
                    nestLevelMap[reply] = 1;
                }

                commentStack.Push(reply);
            }

            int padding = 0;
            if (nestLevelMap.TryGetValue(comment, out int nestLevel))
            {
                padding = 50 * nestLevel;
            }

            <div class="legacy-comment" style="margin-left: @(padding)px;">
                <img class="blog-author-icon" src="@comment.GetAvatarUrl()" alt="@comment.Author">
                @comment.Author &bull;

                <abbr class="text-muted" data-bs-toggle="tooltip" data-bs-title="@comment.CreatedAt.ToString("dddd, d MMMM yyyy HH:mm")">
                    @comment.CreatedAt.Humanize()
                </abbr>

                <div class="comment">@Html.Raw(Markdown.ToHtml(comment.Body, MarkdownPipeline))</div>
            </div>
        }
    }
}
else
{
    <p class="text-center text-muted">Comments are not enabled for this post.</p>
}