using CMSMicroservice.Application.Common.Interfaces;
using CMSMicroservice.Domain.Enums;
using MediatR;
using Microsoft.EntityFrameworkCore;

namespace CMSMicroservice.Application.BlogPostCQ.Queries.GetBlogPost;

public class GetBlogPostQueryHandler : IRequestHandler<GetBlogPostQuery, BlogPostDto>
{
    private readonly IApplicationDbContext _context;

    public GetBlogPostQueryHandler(IApplicationDbContext context)
    {
        _context = context;
    }

    public async Task<BlogPostDto> Handle(GetBlogPostQuery request, CancellationToken cancellationToken)
    {
        var post = await _context.BlogPosts
            .Include(x => x.BlogPostCategories).ThenInclude(x => x.BlogCategory)
            .Include(x => x.BlogPostTags).ThenInclude(x => x.Tag)
            .FirstOrDefaultAsync(x => x.Id == request.Id && !x.IsDeleted, cancellationToken)
            ?? throw new KeyNotFoundException($"مقاله با شناسه {request.Id} یافت نشد");

        return new BlogPostDto
        {
            Id = post.Id,
            Title = post.Title,
            Slug = post.Slug,
            Summary = post.Summary,
            HtmlContent = post.HtmlContent,
            FeaturedImagePath = post.FeaturedImagePath,
            FeaturedImageThumbnailPath = post.FeaturedImageThumbnailPath,
            Status = post.Status,
            StatusName = GetStatusName(post.Status),
            PublishedAt = post.PublishedAt,
            ViewCount = post.ViewCount,
            AuthorUserId = post.AuthorUserId,
            IsFeatured = post.IsFeatured,
            SortOrder = post.SortOrder,
            Created = post.Created,
            LastModified = post.LastModified,
            Categories = post.BlogPostCategories.Select(c => new BlogPostCategoryDto
            {
                Id = c.BlogCategory.Id,
                Title = c.BlogCategory.Title,
                Slug = c.BlogCategory.Slug
            }).ToList(),
            Tags = post.BlogPostTags.Select(t => new BlogPostTagDto
            {
                Id = t.Tag.Id,
                Title = t.Tag.Title,
                Name = t.Tag.Name
            }).ToList()
        };
    }

    public static string GetStatusName(BlogPostStatus status) => status switch
    {
        BlogPostStatus.Draft => "پیش‌نویس",
        BlogPostStatus.Published => "منتشرشده",
        BlogPostStatus.Scheduled => "زمانبندی‌شده",
        BlogPostStatus.Archived => "آرشیو",
        _ => "نامشخص"
    };
}