package validators

import (
	"file-system/internal/api/requests"
	"file-system/internal/common"
)

type NewFeaturesValidator struct{}

func NewNewFeaturesValidator() *NewFeaturesValidator {
	return &NewFeaturesValidator{}
}

func (v *NewFeaturesValidator) ValidateListFiles(req *requests.ListFilesRequest) error {
	if req.BucketName == "" {
		return common.NewBusinessException("Bucket name is required")
	}
	if req.MaxKeys <= 0 {
		req.MaxKeys = 10 // default
	}
	return nil
}

func (v *NewFeaturesValidator) ValidatePreview(req *requests.GetFilePreviewRequest) error {
	if req.BucketName == "" || req.ObjectKey == "" {
		return common.NewBusinessException("Bucket name and Object key are required")
	}
	return nil
}

func (v *NewFeaturesValidator) ValidateInitMultipart(req *requests.InitMultipartRequest) error {
	if req.BucketName == "" || req.ObjectKey == "" {
		return common.NewBusinessException("Bucket name and Object key are required")
	}
	return nil
}

func (v *NewFeaturesValidator) ValidateUploadPart(req *requests.UploadPartRequest) error {
	if req.BucketName == "" || req.ObjectKey == "" || req.UploadId == "" || req.PartNumber <= 0 || req.File == nil {
		return common.NewBusinessException("Missing required fields for upload part")
	}
	return nil
}

func (v *NewFeaturesValidator) ValidateCompleteMultipart(req *requests.CompleteMultipartRequest) error {
	if req.BucketName == "" || req.ObjectKey == "" || req.UploadId == "" || len(req.Parts) == 0 {
		return common.NewBusinessException("Missing required fields for completion")
	}
	return nil
}

func (v *NewFeaturesValidator) ValidateDeleteFile(req *requests.DeleteFileRequest) error {
	if req.BucketName == "" || req.ObjectKey == "" {
		return common.NewBusinessException("Bucket name and Object key are required")
	}
	return nil
}