package storage

import (
	"context"
	"relynolli-server/internal"
	"relynolli-server/models/news"
)

type StorageArticle interface {
	GetArticles(ctx context.Context, limit, offset int64) (int, *[]news.DBArticle, error)
	RetrieveArticle(ctx context.Context, code string) (*news.DBArticle, error)
}

func NewStorageArticle() StorageArticle {
	if instance == nil {
		instance = &storage{
			db:  internal.InitDatabase().GetInstance(),
			rdb: internal.InitRedis(),
		}
	}
	return instance
}

func (s *storage) GetArticles(ctx context.Context, limit, offset int64) (int, *[]news.DBArticle, error) {
	model := new([]news.DBArticle)
	stmt := s.db.NewSelect().Model(model).Where("is_active = 1").OrderExpr("sort ASC, date DESC").Limit(int(limit)).Offset(int(offset))
	count, err := stmt.ScanAndCount(ctx)
	if err != nil {
		return 0, nil, err
	}

	return count, model, nil
}

func (s *storage) RetrieveArticle(ctx context.Context, code string) (*news.DBArticle, error) {
	model := new(news.DBArticle)
	stmt := s.db.NewSelect().Model(model).Where("code = ?", code).Where("is_active = 1")
	err := stmt.Scan(ctx)
	if err != nil {
		return nil, err
	}
	return model, nil
}