using Humanizer;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.EntityFrameworkCore;
using OliverBooth.Data;
using OliverBooth.Data.Blog;

namespace OliverBooth.Pages.Blog;

public class Index : PageModel
{
    private readonly IDbContextFactory<BlogContext> _dbContextFactory;

    public Index(IDbContextFactory<BlogContext> dbContextFactory)
    {
        _dbContextFactory = dbContextFactory;
    }

    public IReadOnlyCollection<BlogPost> BlogPosts { get; private set; } = ArraySegment<BlogPost>.Empty;

    public string SanitizeContent(string content)
    {
        content = content.Replace("<more>", string.Empty);

        while (content.Contains("\n\n"))
        {
            content = content.Replace("\n\n", "\n");
        }

        return Markdig.Markdown.ToHtml(content.Trim());
    }

    public string TrimContent(string content, out bool trimmed)
    {
        ReadOnlySpan<char> span = content.AsSpan();
        int moreIndex = span.IndexOf("<more>", StringComparison.Ordinal);
        trimmed = moreIndex != -1 || span.Length > 256;
        return moreIndex != -1 ? span[..moreIndex].Trim().ToString() : content.Truncate(256);
    }
    
    public Author? GetAuthor(BlogPost post)
    {
        using BlogContext context = _dbContextFactory.CreateDbContext();
        return context.Authors.FirstOrDefault(a => a.Id == post.AuthorId);
    }

    public void OnGet()
    {
        using BlogContext context = _dbContextFactory.CreateDbContext();
        BlogPosts = context.BlogPosts.ToArray();
    }
}