package useCases

import (
	"RenewCMS/internal/domain/audit"
	"RenewCMS/internal/domain/image"
	"context"
)

type RenameMediaUseCase struct {
	imageRepository image.Repository
	recorder        audit.Recorder
}

func NewRenameMediaUseCase(imageRepository image.Repository, recorder audit.Recorder) *RenameMediaUseCase {
	return &RenameMediaUseCase{imageRepository, recorder}
}

func (u *RenameMediaUseCase) Rename(ctx context.Context, id uint32, stem string) (image.Image, error) {
	current, err := u.imageRepository.Get(id)
	if err != nil {
		return image.Image{}, err
	}

	event := audit.NewEvent(audit.ActionMediaRename, audit.CategoryMedia)
	event.Target = imageTarget(current)
	validStem, err := image.ValidateFilenameStem(stem)
	if err != nil {
		recordFailure(ctx, u.recorder, event, err)
		return image.Image{}, err
	}

	renamed, err := u.imageRepository.Rename(id, validStem+image.ExtensionOf(current.Filename))
	if err != nil {
		recordFailure(ctx, u.recorder, event, err)
		return image.Image{}, err
	}
	if renamed.Filename != current.Filename {
		event.Target = imageTarget(renamed)
		event.Changes = []audit.Change{audit.TextChange(audit.FieldFilename, current.Filename, renamed.Filename)}
		u.recorder.Record(ctx, event)
	}
	return renamed, nil
}