namespace TaxBaik.Application.Services;

using System.Text.RegularExpressions;
using TaxBaik.Domain.Entities;
using TaxBaik.Domain.Interfaces;

public class BlogService(IBlogPostRepository repository)
{
    public async Task<BlogPost?> GetBySlugAsync(string slug, CancellationToken ct = default) =>
        await repository.GetBySlugAsync(slug, ct);

    public async Task<(IEnumerable<BlogPost>, int)> GetPublishedPagedAsync(
        int page, int pageSize, int? categoryId = null, CancellationToken ct = default) =>
        await repository.GetPublishedPagedAsync(page, pageSize, categoryId, ct);

    public async Task<IEnumerable<BlogPost>> GetAllForAdminAsync(CancellationToken ct = default) =>
        await repository.GetAllForAdminAsync(ct);

    public async Task<int> CreateAsync(BlogPost post, CancellationToken ct = default)
    {
        post.Slug = GenerateSlug(post.Title);
        post.IsPublished = false;
        return await repository.CreateAsync(post, ct);
    }

    public async Task UpdateAsync(BlogPost post, CancellationToken ct = default) =>
        await repository.UpdateAsync(post, ct);

    public async Task DeleteAsync(int id, CancellationToken ct = default) =>
        await repository.DeleteAsync(id, ct);

    public async Task IncrementViewCountAsync(int id, CancellationToken ct = default) =>
        await repository.IncrementViewCountAsync(id, ct);

    private static string GenerateSlug(string title)
    {
        var slug = Regex.Replace(title.ToLowerInvariant(), @"[^\w\s-]", "");
        slug = Regex.Replace(slug, @"\s+", "-");
        slug = Regex.Replace(slug, @"-+", "-").Trim('-');
        return slug.Length > 100 ? slug[..100] : slug;
    }
}