using Model;
using Model.Entity;
using ORM;
using Service.Implement;
using Service.Interface;
using SqlSugar;

namespace Service.Implement
{
    public class PostService : BaseService<PostEntity>, IPostService
    {
        public PostService(SqlSugarRepository<PostEntity> repository) : base(repository)
        {
        }
        
        public async Task<Result<List<PostEntity>>> GetRecommendedPostsAsync(int count = 10)
        {
            try
            {
                var posts = await _repository.Entities
                    .Where(x => x.IsDel == 0) // 使用正确的字段名
                    .OrderBy(x => x.IsTop, OrderByType.Desc)
                    .OrderBy(x => x.PublishTime, OrderByType.Desc)
                    .Take(count)
                    .ToListAsync();
                
                return Result<List<PostEntity>>.Success(posts);
            }
            catch (Exception ex)
            {
                return Result<List<PostEntity>>.Error("获取推荐帖子失败", ex);
            }
        }

        public async Task<Result<List<PostEntity>>> SearchPostsAsync(string keyword)
        {
            try
            {
                if (string.IsNullOrWhiteSpace(keyword))
                {
                    return Result<List<PostEntity>>.Success(new List<PostEntity>());
                }

                var posts = await _repository.Entities
                    .Where(x => (x.Title.Contains(keyword) || x.Content.Contains(keyword))
                                && x.IsDel == 0) // 使用正确的字段名
                    .OrderBy(x => x.IsTop, OrderByType.Desc)
                    .OrderBy(x => x.PublishTime, OrderByType.Desc)
                    .ToListAsync();
                
                return Result<List<PostEntity>>.Success(posts);
            }
            catch (Exception ex)
            {
                return Result<List<PostEntity>>.Error("搜索帖子失败", ex);
            }
        }

        public async Task<Result<List<PostEntity>>> GetPostsByCategoryAsync(string category, int count = 10)
        {
            try
            {
                if (string.IsNullOrWhiteSpace(category))
                {
                    return Result<List<PostEntity>>.Success(new List<PostEntity>());
                }

                var posts = await _repository.Entities
                    .Where(x => x.Category == category && x.IsDel == 0) // 使用正确的字段名
                    .OrderBy(x => x.IsTop, OrderByType.Desc)
                    .OrderBy(x => x.PublishTime, OrderByType.Desc)
                    .Take(count)
                    .ToListAsync();
                
                return Result<List<PostEntity>>.Success(posts);
            }
            catch (Exception ex)
            {
                return Result<List<PostEntity>>.Error("获取分类帖子失败", ex);
            }
        }

        public async Task<Result<bool>> CreatePostAsync(PostEntity post)
        {
            try
            {
                post.PublishTime = DateTime.Now;
                var result = await _repository.InsertAsync(post);
                return Result<bool>.Success(result);
            }
            catch (Exception ex)
            {
                return Result<bool>.Error("创建帖子失败", ex);
            }
        }

        public async Task<Result<bool>> UpdatePostAsync(PostEntity post)
        {
            try
            {
                var result = await _repository.UpdateAsync(post);
                return Result<bool>.Success(result);
            }
            catch (Exception ex)
            {
                return Result<bool>.Error("更新帖子失败", ex);
            }
        }

        public async Task<Result<bool>> DeletePostAsync(long postId)
        {
            try
            {
                // 软删除：将IsDel设为1
                var post = await _repository.Entities.FirstAsync(x => x.Id == postId);
                if (post == null)
                    return Result<bool>.Error("帖子不存在");
                
                post.IsDel = 1;
                var result = await _repository.UpdateAsync(post);
                return Result<bool>.Success(result);
            }
            catch (Exception ex)
            {
                return Result<bool>.Error("删除帖子失败", ex);
            }
        }
    }
}