@page "/update/{blogPostId}"
@attribute [Authorize]
@using LinkDotNet.Blog.Domain
@using LinkDotNet.Blog.Infrastructure.Persistence
@using LinkDotNet.Blog.Web.Features.Admin.BlogPostEditor.Components
@using LinkDotNet.Blog.Web.Features.Admin.BlogPostEditor.Services
@inject IRepository<BlogPost> BlogPostRepository
@inject IBlogPostVersionService BlogPostVersionService
@inject IToastService ToastService

<PageTitle>Updating: @blogPostFromDb?.Title</PageTitle>

@if (blogPostFromDb is not null)
{
    <CreateNewBlogPost
        Title="Update Blog Post"
        BlogPost="@blogPostFromDb"
        OnBlogPostCreated="@StoreBlogPostAsync"
        OnVersionRestored="@HandleVersionRestoredAsync"
        ClearAfterCreated="false"
        BlogPostId="@BlogPostId">
    </CreateNewBlogPost>
}
else
{
    <Loading></Loading>
}

@code {
    [Parameter, EditorRequired]
    public required string BlogPostId { get; set; }

    private BlogPost? blogPostFromDb;

    protected override async Task OnParametersSetAsync()
    {
        ArgumentException.ThrowIfNullOrEmpty(BlogPostId);

        blogPostFromDb = await BlogPostRepository.GetByIdAsync(BlogPostId);
    }

    private async Task StoreBlogPostAsync(BlogPost blogPost)
    {
        ArgumentNullException.ThrowIfNull(blogPostFromDb);

        await BlogPostVersionService.SaveNewVersionAsync(blogPostFromDb, blogPost);
        ToastService.ShowSuccess($"Saved new version of \"{blogPost.Title}\"");
        blogPostFromDb = await BlogPostRepository.GetByIdAsync(BlogPostId);
    }

    private async Task HandleVersionRestoredAsync(BlogPostVersion version)
    {
        ArgumentNullException.ThrowIfNull(blogPostFromDb);

        await BlogPostVersionService.RestoreVersionAsync(blogPostFromDb, version);
        ToastService.ShowSuccess($"Restored version {version.VersionNumber}");
        blogPostFromDb = await BlogPostRepository.GetByIdAsync(BlogPostId);
        StateHasChanged();
    }
}