package product

import "backend/internal/model"

// BatchDeleteResult 批量删除结果 // Logan.Li
type BatchDeleteResult struct {
	Deleted    int    `json:"deleted"`
	Skipped    int    `json:"skipped"`
	Failed     int    `json:"failed"`
	SkippedIDs []uint `json:"skipped_ids,omitempty"`
}

// BatchDelete 批量删除产品：被 License 引用的跳过；未引用的连同其定价计划一并删除 // Logan.Li
func (s *ProductService) BatchDelete(ids []uint) (*BatchDeleteResult, error) {
	result := &BatchDeleteResult{}
	seen := map[uint]struct{}{}
	for _, id := range ids {
		if id == 0 {
			continue
		}
		if _, ok := seen[id]; ok {
			continue
		}
		seen[id] = struct{}{}

		var licCount int64
		s.db.Model(&model.License{}).Where("product_id = ?", id).Count(&licCount)
		if licCount > 0 {
			result.Skipped++
			result.SkippedIDs = append(result.SkippedIDs, id)
			continue
		}
		if err := s.db.Delete(&model.Product{}, id).Error; err != nil {
			result.Failed++
			continue
		}
		s.db.Where("product_id = ?", id).Delete(&model.Plan{})
		result.Deleted++
	}
	return result, nil
}