@page "/git/{Repository}/refs"
@inherits GitPage

<PageTitle>@Repository refs — git</PageTitle>

<GitBar Repository="@Repository" Reference="@Reference" Tab="refs"/>

<main class="git-main">
    @if (Refs is not { } refs)
    {
        <section class="block">
            <p class="empty">No repository called @Repository.</p>
        </section>
    }
    else
    {
        <section class="block">
            <h2 class="block-head">
                <span>branches</span>
                <span class="block-note">@refs.Branches.Count</span>
            </h2>

            @if (refs.Branches.Count == 0)
            {
                <p class="empty">No branches.</p>
            }
            else
            {
                <div class="scroll">
                    <table>
                        <thead>
                        <tr>
                            <th>name</th>
                            <th>commit</th>
                            <th class="wide">subject</th>
                            <th class="when-wide">author</th>
                            <th class="num">age</th>
                        </tr>
                        </thead>
                        <tbody>
                        @foreach (var branch in refs.Branches)
                        {
                            <tr>
                                <td><a href="@LogLink(branch.Name)">@branch.Name</a></td>
                                <td class="sha dim"><a href="@CommitLink(branch.Sha)">@Shorten(branch.Sha)</a></td>
                                <td class="wide">@branch.Tip?.Summary</td>
                                <td class="dim when-wide">@branch.Tip?.Author.Name</td>
                                <td class="num dim" title="@Exact(branch.Tip?.Committer.When)">
                                    @Age(branch.Tip?.Committer.When)
                                </td>
                            </tr>
                        }
                        </tbody>
                    </table>
                </div>
            }
        </section>

        <section class="block">
            <h2 class="block-head">
                <span>tags</span>
                <span class="block-note">@refs.Tags.Count</span>
            </h2>

            @if (refs.Tags.Count == 0)
            {
                <p class="empty">No tags.</p>
            }
            else
            {
                <div class="scroll">
                    <table>
                        <thead>
                        <tr>
                            <th>name</th>
                            <th>commit</th>
                            <th class="wide">message</th>
                            <th class="num">age</th>
                        </tr>
                        </thead>
                        <tbody>
                        @foreach (var tag in refs.Tags)
                        {
                            <tr>
                                <td><a href="@TreeLink("", tag.Name)">@tag.Name</a></td>
                                <td class="sha dim">
                                    @if (tag.Tip is { } tip)
                                    {
                                        <a href="@CommitLink(tip.Sha)">@Shorten(tip.Sha)</a>
                                    }
                                </td>
                                @* An annotated tag's own message, falling back to the subject of
                                   what it points at — which is all a lightweight tag has. *@
                                <td class="wide">@(First(tag.Message) ?? tag.Tip?.Summary)</td>
                                <td class="num dim" title="@Exact(tag.Tip?.Committer.When)">
                                    @Age(tag.Tip?.Committer.When)
                                </td>
                            </tr>
                        }
                        </tbody>
                    </table>
                </div>
            }
        </section>
    }
</main>

@code {
    private GitRefsView? Refs { get; set; }

    protected override void OnParametersSet()
    {
        Refs = Service.GetRefs(Repository);

        if (Refs is null) NotFound();
    }

    private static string Shorten(string sha) => sha.Length >= 10 ? sha[..10] : sha;

    private static string? First(string? message) =>
        message?.Split('\n', 2)[0].Trim() is { Length: > 0 } line ? line : null;
}