package logic

import (
	"context"
	"database/sql"
	"fmt"

	"git.cialloo.com/CiallooWeb/Blog/app/internal/svc"
	"git.cialloo.com/CiallooWeb/Blog/app/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
)

type CreatePostLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

// Create a new blog post
func NewCreatePostLogic(ctx context.Context, svcCtx *svc.ServiceContext) *CreatePostLogic {
	return &CreatePostLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *CreatePostLogic) CreatePost(req *types.CreatePostReq) (resp *types.CreatePostResp, err error) {
	var coverID sql.NullInt64

	// If cover image key is provided, get the file ID from files table
	if req.Cover_image_key != "" {
		query := `SELECT id FROM files WHERE file_key = $1`
		err := l.svcCtx.DB.QueryRowContext(l.ctx, query, req.Cover_image_key).Scan(&coverID.Int64)
		if err != nil {
			if err == sql.ErrNoRows {
				l.Errorf("Cover image file not found with key: %s", req.Cover_image_key)
				return nil, fmt.Errorf("cover image not found")
			}
			l.Errorf("Failed to get cover image file: %v", err)
			return nil, err
		}
		coverID.Valid = true
	}

	// Insert new post
	var postID int64
	query := `INSERT INTO posts (title, content, cover_id) VALUES ($1, $2, $3) RETURNING id`
	err = l.svcCtx.DB.QueryRowContext(l.ctx, query, req.Title, req.Content, coverID).Scan(&postID)
	if err != nil {
		l.Errorf("Failed to create post: %v", err)
		return nil, err
	}

	return &types.CreatePostResp{
		Post_id: fmt.Sprintf("%d", postID),
	}, nil
}