// monorepo/cloud/backend/internal/maplefile/usecase/filemetadata/create.go
package filemetadata

import (
	"go.uber.org/zap"

	"codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/config"
	dom_file "codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/internal/domain/file"
	"codeberg.org/mapleopentech/monorepo/cloud/maplefile-backend/pkg/httperror"
)

type CreateFileMetadataUseCase interface {
	Execute(file *dom_file.File) error
}

type createFileMetadataUseCaseImpl struct {
	config *config.Configuration
	logger *zap.Logger
	repo   dom_file.FileMetadataRepository
}

func NewCreateFileMetadataUseCase(
	config *config.Configuration,
	logger *zap.Logger,
	repo dom_file.FileMetadataRepository,
) CreateFileMetadataUseCase {
	logger = logger.Named("CreateFileMetadataUseCase")
	return &createFileMetadataUseCaseImpl{config, logger, repo}
}

func (uc *createFileMetadataUseCaseImpl) Execute(file *dom_file.File) error {
	//
	// STEP 1: Validation.
	//

	e := make(map[string]string)
	if file == nil {
		e["file"] = "File is required"
	} else {
		if file.CollectionID.String() == "" {
			e["collection_id"] = "Collection ID is required"
		}
		if file.OwnerID.String() == "" {
			e["owner_id"] = "Owner ID is required"
		}
		if file.EncryptedMetadata == "" {
			e["encrypted_metadata"] = "Encrypted metadata is required"
		}
		if file.EncryptedFileKey.Ciphertext == nil || len(file.EncryptedFileKey.Ciphertext) == 0 {
			e["encrypted_file_key"] = "Encrypted file key is required"
		}
		if file.EncryptionVersion == "" {
			e["encryption_version"] = "Encryption version is required"
		}
		if file.EncryptedHash == "" {
			e["encrypted_hash"] = "Encrypted hash is required"
		}
		if file.EncryptedFileObjectKey == "" {
			e["encrypted_file_object_key"] = "Encrypted file object key is required"
		}
		if file.EncryptedFileSizeInBytes <= 0 {
			e["encrypted_file_size_in_bytes"] = "Encrypted file size must be greater than 0"
		}
		if file.State == "" {
			e["state"] = "File state is required"
		} else if file.State != dom_file.FileStatePending &&
			file.State != dom_file.FileStateActive &&
			file.State != dom_file.FileStateDeleted &&
			file.State != dom_file.FileStateArchived {
			e["state"] = "Invalid file state"
		}
	}
	if len(e) != 0 {
		uc.logger.Warn("Failed validating file metadata creation",
			zap.Any("error", e))
		return httperror.NewForBadRequest(&e)
	}

	//
	// STEP 2: Insert into database.
	//

	return uc.repo.Create(file)
}