package com.social.media.service.impl;

import com.social.media.domain.entity.Media;
import com.social.media.domain.entity.Media.MediaFormat;
import com.social.media.domain.entity.Media.MediaValidationStatus;
import com.social.media.dto.MediaDto;
import com.social.media.repository.MediaRepository;
import com.social.media.service.MediaService;
import com.social.media.util.MediaMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Transactional
public class MediaServiceImpl implements MediaService {

    private static final Logger logger = LoggerFactory.getLogger(MediaServiceImpl.class);

    @Autowired
    private MediaRepository mediaRepository;

    @Autowired
    private MediaMapper mediaMapper;

    @Value("${app.file-upload.storage-path:./uploads}")
    private String storagePath;

    @Value("${app.file-upload.max-file-size:50MB}")
    private String maxFileSize;

    @Value("${app.file-upload.allowed-extensions:jpg,jpeg,png,gif,mp4,mov,avi,pdf,doc,docx}")
    private String allowedExtensions;

    // Basic CRUD operations
    @Override
    public MediaDto save(MediaDto mediaDto) {
        logger.info("Salvando nova mídia: {}", mediaDto.getOriginalFilename());
        
        Media media = mediaMapper.toEntity(mediaDto);
        
        // Generate media code if not provided
        if (media.getMediaCode() == null) {
            media.setMediaCode(generateMediaCode());
        }
        
        Media savedMedia = mediaRepository.save(media);
        logger.info("Mídia salva com sucesso: ID {}", savedMedia.getId());
        
        return mediaMapper.toDto(savedMedia);
    }

    @Override
    public MediaDto update(Long id, MediaDto mediaDto) {
        logger.info("Atualizando mídia ID: {}", id);
        
        Media existingMedia = mediaRepository.findById(id)
                .orElseThrow(() -> new RuntimeException("Mídia não encontrada: " + id));
        
        // Update only allowed fields
        if (mediaDto.getDescription() != null) {
            existingMedia.setDescription(mediaDto.getDescription());
        }
        if (mediaDto.getAltText() != null) {
            existingMedia.setAltText(mediaDto.getAltText());
        }
        if (mediaDto.getIsPublic() != null) {
            existingMedia.setIsPublic(mediaDto.getIsPublic());
        }
        if (mediaDto.getMetadata() != null) {
            existingMedia.setMetadata(mediaDto.getMetadata());
        }
        
        Media updatedMedia = mediaRepository.save(existingMedia);
        logger.info("Mídia atualizada com sucesso: ID {}", updatedMedia.getId());
        
        return mediaMapper.toDto(updatedMedia);
    }

    @Override
    public void delete(Long id) {
        logger.info("Excluindo mídia permanentemente ID: {}", id);
        
        Optional<Media> media = mediaRepository.findById(id);
        if (media.isPresent()) {
            // Delete physical file
            try {
                Path filePath = Paths.get(media.get().getFilePath());
                Files.deleteIfExists(filePath);
                logger.info("Arquivo físico removido: {}", filePath);
            } catch (IOException e) {
                logger.error("Erro ao remover arquivo físico: {}", e.getMessage());
            }
            
            mediaRepository.deleteById(id);
            logger.info("Mídia excluída permanentemente: ID {}", id);
        }
    }

    @Override
    public void softDelete(Long id) {
        logger.info("Excluindo mídia (soft delete) ID: {}", id);
        
        Media media = mediaRepository.findById(id)
                .orElseThrow(() -> new RuntimeException("Mídia não encontrada: " + id));
        
        media.markAsDeleted();
        mediaRepository.save(media);
        logger.info("Mídia marcada como excluída: ID {}", id);
    }

    @Override
    public void restore(Long id) {
        logger.info("Restaurando mídia ID: {}", id);
        
        Media media = mediaRepository.findById(id)
                .orElseThrow(() -> new RuntimeException("Mídia não encontrada: " + id));
        
        media.restore();
        mediaRepository.save(media);
        logger.info("Mídia restaurada: ID {}", id);
    }

    @Override
    @Transactional(readOnly = true)
    public Optional<MediaDto> findById(Long id) {
        return mediaRepository.findById(id)
                .map(mediaMapper::toDto);
    }

    @Override
    @Transactional(readOnly = true)
    public List<MediaDto> findAll() {
        return mediaRepository.findAll().stream()
                .map(mediaMapper::toDto)
                .collect(Collectors.toList());
    }

    @Override
    @Transactional(readOnly = true)
    public Page<MediaDto> findAll(Pageable pageable) {
        return mediaRepository.findAll(pageable)
                .map(mediaMapper::toDto);
    }

    // Find by unique identifiers
    @Override
    @Transactional(readOnly = true)
    public Optional<MediaDto> findByMediaCode(String mediaCode) {
        return mediaRepository.findByMediaCode(mediaCode)
                .map(mediaMapper::toDto);
    }

    @Override
    @Transactional(readOnly = true)
    public Optional<MediaDto> findByStoredFilename(String storedFilename) {
        return mediaRepository.findByStoredFilename(storedFilename)
                .map(mediaMapper::toDto);
    }

    @Override
    @Transactional(readOnly = true)
    public Optional<MediaDto> findByFileChecksum(String fileChecksum) {
        return mediaRepository.findByFileChecksum(fileChecksum)
                .map(mediaMapper::toDto);
    }

    // Company-based operations
    @Override
    @Transactional(readOnly = true)
    public List<MediaDto> findByCompanyId(Long companyId) {
        return mediaRepository.findByCompanyId(companyId).stream()
                .map(mediaMapper::toDto)
                .collect(Collectors.toList());
    }

    @Override
    @Transactional(readOnly = true)
    public Page<MediaDto> findByCompanyId(Long companyId, Pageable pageable) {
        return mediaRepository.findByCompanyId(companyId, pageable)
                .map(mediaMapper::toDto);
    }

    @Override
    @Transactional(readOnly = true)
    public List<MediaDto> findActiveByCompanyId(Long companyId) {
        return mediaRepository.findActiveByCompanyId(companyId).stream()
                .map(mediaMapper::toDto)
                .collect(Collectors.toList());
    }

    @Override
    @Transactional(readOnly = true)
    public Page<MediaDto> findActiveByCompanyId(Long companyId, Pageable pageable) {
        return mediaRepository.findActiveByCompanyId(companyId, pageable)
                .map(mediaMapper::toDto);
    }

    // User-based operations
    @Override
    @Transactional(readOnly = true)
    public List<MediaDto> findByUploadedBy(Long uploadedBy) {
        return mediaRepository.findByUploadedBy(uploadedBy).stream()
                .map(mediaMapper::toDto)
                .collect(Collectors.toList());
    }

    @Override
    @Transactional(readOnly = true)
    public Page<MediaDto> findByUploadedBy(Long uploadedBy, Pageable pageable) {
        return mediaRepository.findByUploadedBy(uploadedBy, pageable)
                .map(mediaMapper::toDto);
    }

    @Override
    @Transactional(readOnly = true)
    public List<MediaDto> findActiveByUploadedBy(Long uploadedBy) {
        return mediaRepository.findActiveByUploadedBy(uploadedBy).stream()
                .map(mediaMapper::toDto)
                .collect(Collectors.toList());
    }

    @Override
    @Transactional(readOnly = true)
    public Page<MediaDto> findActiveByUploadedBy(Long uploadedBy, Pageable pageable) {
        return mediaRepository.findActiveByUploadedBy(uploadedBy, pageable)
                .map(mediaMapper::toDto);
    }

    // Format-based operations
    @Override
    @Transactional(readOnly = true)
    public List<MediaDto> findByFormat(MediaFormat format) {
        return mediaRepository.findByFormat(format).stream()
                .map(mediaMapper::toDto)
                .collect(Collectors.toList());
    }

    @Override
    @Transactional(readOnly = true)
    public Page<MediaDto> findByFormat(MediaFormat format, Pageable pageable) {
        return mediaRepository.findByFormat(format, pageable)
                .map(mediaMapper::toDto);
    }

    @Override
    @Transactional(readOnly = true)
    public List<MediaDto> findByCompanyIdAndFormat(Long companyId, MediaFormat format) {
        return mediaRepository.findByCompanyIdAndFormat(companyId, format).stream()
                .map(mediaMapper::toDto)
                .collect(Collectors.toList());
    }

    @Override
    @Transactional(readOnly = true)
    public Page<MediaDto> findByCompanyIdAndFormat(Long companyId, MediaFormat format, Pageable pageable) {
        return mediaRepository.findByCompanyIdAndFormat(companyId, format, pageable)
                .map(mediaMapper::toDto);
    }

    // File upload operations
    @Override
    public MediaDto uploadFile(MultipartFile file, Long companyId, Long uploadedBy, String description, String altText, Boolean isPublic) {
        logger.info("Iniciando upload de arquivo: {} para empresa ID: {}", file.getOriginalFilename(), companyId);
        
        validateFile(file);
        
        try {
            // Generate unique filename
            String originalFilename = file.getOriginalFilename();
            String storedFilename = generateUniqueFilename(originalFilename, companyId);
            
            // Create directory if not exists
            Path uploadDir = Paths.get(storagePath, "company_" + companyId);
            Files.createDirectories(uploadDir);
            
            // Save file to disk
            Path filePath = uploadDir.resolve(storedFilename);
            Files.copy(file.getInputStream(), filePath);
            
            // Calculate checksum
            String checksum = calculateChecksum(file.getBytes());
            
            // Detect format
            MediaFormat format = detectFormat(originalFilename, file.getContentType());
            
            // Create media entity
            Media media = new Media();
            media.setMediaCode(generateMediaCode());
            media.setCompanyId(companyId);
            media.setUploadedBy(uploadedBy);
            media.setOriginalFilename(originalFilename);
            media.setStoredFilename(storedFilename);
            media.setFilePath(filePath.toString());
            media.setFileSize(file.getSize());
            media.setMimeType(file.getContentType());
            media.setFormat(format);
            media.setDescription(description);
            media.setAltText(altText);
            media.setIsPublic(isPublic != null ? isPublic : false);
            media.setFileChecksum(checksum);
            media.setValidationStatus(MediaValidationStatus.PENDING);
            
            // Extract dimensions for images
            if (media.isImage()) {
                extractImageDimensions(media, file);
            }
            
            // Extract duration for videos/audio
            if (media.isVideo() || media.isAudio()) {
                extractMediaDuration(media, file);
            }
            
            Media savedMedia = mediaRepository.save(media);
            logger.info("Arquivo carregado com sucesso: ID {}", savedMedia.getId());
            
            return mediaMapper.toDto(savedMedia);
            
        } catch (IOException e) {
            logger.error("Erro ao fazer upload do arquivo: {}", e.getMessage());
            throw new RuntimeException("Erro ao salvar arquivo: " + e.getMessage());
        }
    }

    @Override
    public MediaDto uploadFileWithMetadata(MultipartFile file, Long companyId, Long uploadedBy, String description, 
                                          String altText, Boolean isPublic, Map<String, Object> metadata) {
        MediaDto mediaDto = uploadFile(file, companyId, uploadedBy, description, altText, isPublic);
        
        if (metadata != null && !metadata.isEmpty()) {
            // Set metadata directly as Map
            mediaDto.setMetadata(metadata);
            
            // Update in database
            Media media = mediaRepository.findById(mediaDto.getId()).orElseThrow();
            media.setMetadata(metadata);
            mediaRepository.save(media);
        }
        
        return mediaDto;
    }

    @Override
    public List<MediaDto> uploadMultipleFiles(MultipartFile[] files, Long companyId, Long uploadedBy, Boolean isPublic) {
        List<MediaDto> uploadedFiles = new ArrayList<>();
        
        for (MultipartFile file : files) {
            try {
                MediaDto mediaDto = uploadFile(file, companyId, uploadedBy, null, null, isPublic);
                uploadedFiles.add(mediaDto);
            } catch (Exception e) {
                logger.error("Erro ao fazer upload do arquivo {}: {}", file.getOriginalFilename(), e.getMessage());
            }
        }
        
        return uploadedFiles;
    }

    // Validation operations
    @Override
    public void approveMedia(Long id, String notes) {
        logger.info("Aprovando mídia ID: {}", id);
        
        Media media = mediaRepository.findById(id)
                .orElseThrow(() -> new RuntimeException("Mídia não encontrada: " + id));
        
        media.approve(notes);
        mediaRepository.save(media);
        logger.info("Mídia aprovada: ID {}", id);
    }

    @Override
    public void rejectMedia(Long id, String notes) {
        logger.info("Rejeitando mídia ID: {}", id);
        
        Media media = mediaRepository.findById(id)
                .orElseThrow(() -> new RuntimeException("Mídia não encontrada: " + id));
        
        media.reject(notes);
        mediaRepository.save(media);
        logger.info("Mídia rejeitada: ID {}", id);
    }

    @Override
    public void flagMedia(Long id, String notes) {
        logger.info("Sinalizando mídia ID: {}", id);
        
        Media media = mediaRepository.findById(id)
                .orElseThrow(() -> new RuntimeException("Mídia não encontrada: " + id));
        
        media.flag(notes);
        mediaRepository.save(media);
        logger.info("Mídia sinalizada: ID {}", id);
    }

    @Override
    public void requestReview(Long id) {
        logger.info("Solicitando revisão para mídia ID: {}", id);
        
        Media media = mediaRepository.findById(id)
                .orElseThrow(() -> new RuntimeException("Mídia não encontrada: " + id));
        
        media.setValidationStatus(MediaValidationStatus.UNDER_REVIEW);
        mediaRepository.save(media);
        logger.info("Revisão solicitada para mídia: ID {}", id);
    }

    // Statistical operations
    @Override
    @Transactional(readOnly = true)
    public Long countActiveByCompanyId(Long companyId) {
        return mediaRepository.countActiveByCompanyId(companyId);
    }

    @Override
    @Transactional(readOnly = true)
    public Long countByCompanyIdAndFormat(Long companyId, MediaFormat format) {
        return mediaRepository.countByCompanyIdAndFormat(companyId, format);
    }

    @Override
    @Transactional(readOnly = true)
    public Long countByCompanyIdAndValidationStatus(Long companyId, MediaValidationStatus status) {
        return mediaRepository.countByCompanyIdAndValidationStatus(companyId, status);
    }

    @Override
    @Transactional(readOnly = true)
    public Long getTotalFileSizeByCompanyId(Long companyId) {
        Long totalSize = mediaRepository.getTotalFileSizeByCompanyId(companyId);
        return totalSize != null ? totalSize : 0L;
    }

    @Override
    @Transactional(readOnly = true)
    public Double getAverageFileSizeByCompanyId(Long companyId) {
        Double avgSize = mediaRepository.getAverageFileSizeByCompanyId(companyId);
        return avgSize != null ? avgSize : 0.0;
    }

    // Utility methods
    private void validateFile(MultipartFile file) {
        if (file.isEmpty()) {
            throw new RuntimeException("Arquivo está vazio");
        }
        
        String originalFilename = file.getOriginalFilename();
        if (originalFilename == null || originalFilename.trim().isEmpty()) {
            throw new RuntimeException("Nome do arquivo é inválido");
        }
        
        if (!isValidFormat(originalFilename)) {
            throw new RuntimeException("Formato de arquivo não permitido");
        }
        
        if (!isValidSize(file.getSize())) {
            throw new RuntimeException("Tamanho do arquivo excede o limite permitido");
        }
        
        if (!isValidMimeType(file.getContentType())) {
            throw new RuntimeException("Tipo MIME não permitido");
        }
    }

    @Override
    public boolean isValidFormat(String filename) {
        if (filename == null) return false;
        
        String extension = getFileExtension(filename).toLowerCase();
        List<String> allowed = Arrays.asList(allowedExtensions.toLowerCase().split(","));
        
        return allowed.contains(extension);
    }

    @Override
    public boolean isValidSize(Long fileSize) {
        if (fileSize == null) return false;
        
        // Convert maxFileSize string to bytes
        long maxBytes = parseSize(maxFileSize);
        return fileSize <= maxBytes;
    }

    @Override
    public boolean isValidMimeType(String mimeType) {
        if (mimeType == null) return false;
        
        // List of allowed MIME types
        List<String> allowedMimeTypes = Arrays.asList(
            "image/jpeg", "image/png", "image/gif", "image/webp", "image/svg+xml", "image/bmp", "image/tiff",
            "video/mp4", "video/avi", "video/quicktime", "video/x-msvideo", "video/x-flv", "video/webm", "video/x-matroska",
            "audio/mpeg", "audio/wav", "audio/aac", "audio/ogg", "audio/flac", "audio/mp4",
            "application/pdf", "application/msword", "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
            "application/vnd.ms-excel", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
            "application/vnd.ms-powerpoint", "application/vnd.openxmlformats-officedocument.presentationml.presentation",
            "text/plain", "application/rtf",
            "application/zip", "application/x-rar-compressed", "application/x-7z-compressed", "application/x-tar", "application/gzip"
        );
        
        return allowedMimeTypes.contains(mimeType.toLowerCase());
    }

    @Override
    public MediaFormat detectFormat(String filename, String mimeType) {
        String extension = getFileExtension(filename).toLowerCase();
        
        // Image formats
        switch (extension) {
            case "jpg", "jpeg" -> { return MediaFormat.IMAGE_JPEG; }
            case "png" -> { return MediaFormat.IMAGE_PNG; }
            case "gif" -> { return MediaFormat.IMAGE_GIF; }
            case "webp" -> { return MediaFormat.IMAGE_WEBP; }
            case "svg" -> { return MediaFormat.IMAGE_SVG; }
            case "bmp" -> { return MediaFormat.IMAGE_BMP; }
            case "tiff", "tif" -> { return MediaFormat.IMAGE_TIFF; }
            
            // Video formats
            case "mp4" -> { return MediaFormat.VIDEO_MP4; }
            case "avi" -> { return MediaFormat.VIDEO_AVI; }
            case "mov" -> { return MediaFormat.VIDEO_MOV; }
            case "wmv" -> { return MediaFormat.VIDEO_WMV; }
            case "flv" -> { return MediaFormat.VIDEO_FLV; }
            case "webm" -> { return MediaFormat.VIDEO_WEBM; }
            case "mkv" -> { return MediaFormat.VIDEO_MKV; }
            
            // Audio formats
            case "mp3" -> { return MediaFormat.AUDIO_MP3; }
            case "wav" -> { return MediaFormat.AUDIO_WAV; }
            case "aac" -> { return MediaFormat.AUDIO_AAC; }
            case "ogg" -> { return MediaFormat.AUDIO_OGG; }
            case "flac" -> { return MediaFormat.AUDIO_FLAC; }
            case "m4a" -> { return MediaFormat.AUDIO_M4A; }
            
            // Document formats
            case "pdf" -> { return MediaFormat.DOCUMENT_PDF; }
            case "doc" -> { return MediaFormat.DOCUMENT_DOC; }
            case "docx" -> { return MediaFormat.DOCUMENT_DOCX; }
            case "xls" -> { return MediaFormat.DOCUMENT_XLS; }
            case "xlsx" -> { return MediaFormat.DOCUMENT_XLSX; }
            case "ppt" -> { return MediaFormat.DOCUMENT_PPT; }
            case "pptx" -> { return MediaFormat.DOCUMENT_PPTX; }
            case "txt" -> { return MediaFormat.DOCUMENT_TXT; }
            case "rtf" -> { return MediaFormat.DOCUMENT_RTF; }
            
            // Archive formats
            case "zip" -> { return MediaFormat.ARCHIVE_ZIP; }
            case "rar" -> { return MediaFormat.ARCHIVE_RAR; }
            case "7z" -> { return MediaFormat.ARCHIVE_7Z; }
            case "tar" -> { return MediaFormat.ARCHIVE_TAR; }
            case "gz" -> { return MediaFormat.ARCHIVE_GZ; }
            
            default -> { return MediaFormat.OTHER; }
        }
    }

    @Override
    public String generateUniqueFilename(String originalFilename, Long companyId) {
        String extension = getFileExtension(originalFilename);
        String baseName = getBaseName(originalFilename);
        String timestamp = String.valueOf(System.currentTimeMillis());
        String randomSuffix = UUID.randomUUID().toString().substring(0, 8);
        
        return String.format("%s_%s_%s.%s", baseName, timestamp, randomSuffix, extension);
    }

    @Override
    public String calculateChecksum(byte[] fileContent) {
        try {
            MessageDigest digest = MessageDigest.getInstance("SHA-256");
            byte[] hashBytes = digest.digest(fileContent);
            
            StringBuilder hexString = new StringBuilder();
            for (byte b : hashBytes) {
                String hex = Integer.toHexString(0xff & b);
                if (hex.length() == 1) {
                    hexString.append('0');
                }
                hexString.append(hex);
            }
            
            return hexString.toString();
        } catch (NoSuchAlgorithmException e) {
            logger.error("Erro ao calcular checksum: {}", e.getMessage());
            return null;
        }
    }

    // Helper methods
    private String generateMediaCode() {
        // Implementation for generating unique media code
        return "MED" + String.format("%08d", new Random().nextInt(99999999));
    }

    private String getFileExtension(String filename) {
        if (filename == null || !filename.contains(".")) {
            return "";
        }
        return filename.substring(filename.lastIndexOf(".") + 1);
    }

    private String getBaseName(String filename) {
        if (filename == null || !filename.contains(".")) {
            return filename;
        }
        return filename.substring(0, filename.lastIndexOf("."));
    }

    private long parseSize(String sizeStr) {
        // Simple implementation to parse size strings like "50MB"
        if (sizeStr == null) return 0;
        
        sizeStr = sizeStr.toUpperCase().trim();
        if (sizeStr.endsWith("KB")) {
            return Long.parseLong(sizeStr.replace("KB", "")) * 1024;
        } else if (sizeStr.endsWith("MB")) {
            return Long.parseLong(sizeStr.replace("MB", "")) * 1024 * 1024;
        } else if (sizeStr.endsWith("GB")) {
            return Long.parseLong(sizeStr.replace("GB", "")) * 1024 * 1024 * 1024;
        } else {
            return Long.parseLong(sizeStr);
        }
    }

    private void extractImageDimensions(Media media, MultipartFile file) {
        // TODO: Implement image dimension extraction
        // This would require image processing libraries like ImageIO
        logger.debug("Extração de dimensões de imagem não implementada ainda");
    }

    private void extractMediaDuration(Media media, MultipartFile file) {
        // TODO: Implement media duration extraction
        // This would require media processing libraries like FFmpeg
        logger.debug("Extração de duração de mídia não implementada ainda");
    }

    private String convertMapToJson(Map<String, Object> map) {
        // Simple JSON conversion - in production, use Jackson or similar
        StringBuilder json = new StringBuilder("{");
        boolean first = true;
        for (Map.Entry<String, Object> entry : map.entrySet()) {
            if (!first) json.append(",");
            json.append("\"").append(entry.getKey()).append("\":\"").append(entry.getValue()).append("\"");
            first = false;
        }
        json.append("}");
        return json.toString();
    }

    // Stub implementations for remaining methods (to be implemented as needed)
    
    @Override public List<MediaDto> findByValidationStatus(MediaValidationStatus validationStatus) { return Collections.emptyList(); }
    @Override public Page<MediaDto> findByValidationStatus(MediaValidationStatus validationStatus, Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findByCompanyIdAndValidationStatus(Long companyId, MediaValidationStatus status) { return Collections.emptyList(); }
    @Override public Page<MediaDto> findByCompanyIdAndValidationStatus(Long companyId, MediaValidationStatus status, Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findByIsPublic(Boolean isPublic) { return Collections.emptyList(); }
    @Override public Page<MediaDto> findByIsPublic(Boolean isPublic, Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findByCompanyIdAndIsPublic(Long companyId, Boolean isPublic) { return Collections.emptyList(); }
    @Override public Page<MediaDto> findByCompanyIdAndIsPublic(Long companyId, Boolean isPublic, Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findByUploadedAtBetween(LocalDateTime startDate, LocalDateTime endDate) { return Collections.emptyList(); }
    @Override public Page<MediaDto> findByUploadedAtBetween(LocalDateTime startDate, LocalDateTime endDate, Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findByCompanyIdAndUploadedAtBetween(Long companyId, LocalDateTime startDate, LocalDateTime endDate) { return Collections.emptyList(); }
    @Override public Page<MediaDto> findByCompanyIdAndUploadedAtBetween(Long companyId, LocalDateTime startDate, LocalDateTime endDate, Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findByFileSizeBetween(Long minSize, Long maxSize) { return Collections.emptyList(); }
    @Override public Page<MediaDto> findByFileSizeBetween(Long minSize, Long maxSize, Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findLargeFilesByCompanyId(Long companyId, Long minSize) { return Collections.emptyList(); }
    @Override public List<MediaDto> findByMimeType(String mimeType) { return Collections.emptyList(); }
    @Override public List<MediaDto> findByMimeTypeContaining(String mimeTypePattern) { return Collections.emptyList(); }
    @Override public List<MediaDto> searchByCompanyId(Long companyId, String searchTerm) { return Collections.emptyList(); }
    @Override public Page<MediaDto> searchByCompanyId(Long companyId, String searchTerm, Pageable pageable) { return Page.empty(); }
    @Override public Page<MediaDto> findWithFilters(Long companyId, MediaFormat format, MediaValidationStatus validationStatus, Boolean isPublic, Long uploadedBy, Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findImagesByCompanyId(Long companyId) { return Collections.emptyList(); }
    @Override public Page<MediaDto> findImagesByCompanyId(Long companyId, Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findVideosByCompanyId(Long companyId) { return Collections.emptyList(); }
    @Override public Page<MediaDto> findVideosByCompanyId(Long companyId, Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findAudiosByCompanyId(Long companyId) { return Collections.emptyList(); }
    @Override public Page<MediaDto> findAudiosByCompanyId(Long companyId, Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findDocumentsByCompanyId(Long companyId) { return Collections.emptyList(); }
    @Override public Page<MediaDto> findDocumentsByCompanyId(Long companyId, Pageable pageable) { return Page.empty(); }
    
    // File processing operations stubs
    @Override public MediaDto processImageFile(MultipartFile file, Long companyId, Long uploadedBy, String description, String altText, Boolean isPublic) { return uploadFile(file, companyId, uploadedBy, description, altText, isPublic); }
    @Override public MediaDto processVideoFile(MultipartFile file, Long companyId, Long uploadedBy, String description, String altText, Boolean isPublic) { return uploadFile(file, companyId, uploadedBy, description, altText, isPublic); }
    @Override public MediaDto processAudioFile(MultipartFile file, Long companyId, Long uploadedBy, String description, String altText, Boolean isPublic) { return uploadFile(file, companyId, uploadedBy, description, altText, isPublic); }
    @Override public MediaDto processDocumentFile(MultipartFile file, Long companyId, Long uploadedBy, String description, String altText, Boolean isPublic) { return uploadFile(file, companyId, uploadedBy, description, altText, isPublic); }
    
    // Additional stub implementations
    @Override public List<MediaDto> findPendingValidation(Long companyId) { return Collections.emptyList(); }
    @Override public Page<MediaDto> findPendingValidation(Long companyId, Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findPendingValidationOlderThan(LocalDateTime cutoffDate) { return Collections.emptyList(); }
    @Override public byte[] getFileContent(Long id) { return new byte[0]; }
    @Override public byte[] getFileContent(String storedFilename) { return new byte[0]; }
    @Override public String getFileUrl(Long id) { return ""; }
    @Override public String getFileUrl(String storedFilename) { return ""; }
    @Override public String getThumbnailUrl(Long id) { return ""; }
    @Override public String getPreviewUrl(Long id) { return ""; }
    @Override public boolean fileExists(Long id) { return false; }
    @Override public boolean fileExists(String storedFilename) { return false; }
    @Override public List<MediaDto> findDuplicatesByChecksum(Long companyId, String checksum) { return Collections.emptyList(); }
    @Override public List<MediaDto> findPotentialDuplicates(Long companyId, String filename, Long fileSize) { return Collections.emptyList(); }
    @Override public boolean isDuplicate(Long companyId, String checksum) { return false; }
    @Override public boolean isDuplicate(Long companyId, String filename, Long fileSize) { return false; }
    @Override public List<MediaDto> findDeleted() { return Collections.emptyList(); }
    @Override public Page<MediaDto> findDeleted(Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findDeletedBefore(LocalDateTime cutoffDate) { return Collections.emptyList(); }
    @Override public void permanentDelete(Long id) { }
    @Override public void cleanupDeletedFiles(LocalDateTime cutoffDate) { }
    @Override public void validateFileIntegrity(Long companyId) { }
    @Override public List<String> findOrphanedFiles(Long companyId) { return Collections.emptyList(); }
    @Override public void cleanupOrphanedFiles(Long companyId) { }
    @Override public Map<String, Long> getFormatStatisticsByCompanyId(Long companyId) { return Collections.emptyMap(); }
    @Override public Map<String, Long> getTopUploadersByCompanyId(Long companyId) { return Collections.emptyMap(); }
    @Override public Map<String, Object> getCompanyMediaStatistics(Long companyId) { return Collections.emptyMap(); }
    @Override public Map<String, Object> getGlobalMediaStatistics() { return Collections.emptyMap(); }
    @Override public List<MediaDto> findByStorageProvider(String storageProvider) { return Collections.emptyList(); }
    @Override public List<MediaDto> findActiveByStorageProvider(String storageProvider) { return Collections.emptyList(); }
    @Override public void migrateToStorageProvider(Long companyId, String newProvider) { }
    @Override public void migrateFileToStorageProvider(Long id, String newProvider) { }
    @Override public List<MediaDto> findRecentUploads(Long companyId, LocalDateTime since) { return Collections.emptyList(); }
    @Override public Page<MediaDto> findRecentUploads(Long companyId, LocalDateTime since, Pageable pageable) { return Page.empty(); }
    @Override public List<MediaDto> findRecentUploadsByUser(Long uploadedBy, LocalDateTime since) { return Collections.emptyList(); }
    @Override public void approveMultiple(List<Long> ids, String notes) { }
    @Override public void rejectMultiple(List<Long> ids, String notes) { }
    @Override public void deleteMultiple(List<Long> ids) { }
    @Override public void softDeleteMultiple(List<Long> ids) { }
    @Override public void restoreMultiple(List<Long> ids) { }
    @Override public void updateVisibilityMultiple(List<Long> ids, Boolean isPublic) { }
    @Override public void moveToCompany(List<Long> ids, Long newCompanyId) { }
    @Override public MediaDto generateThumbnail(Long id) { return null; }
    @Override public MediaDto generatePreview(Long id) { return null; }
    @Override public MediaDto resizeImage(Long id, Integer width, Integer height) { return null; }
    @Override public MediaDto convertFormat(Long id, MediaFormat newFormat) { return null; }
    @Override public MediaDto compressFile(Long id) { return null; }
    @Override public MediaDto extractMetadata(Long id) { return null; }
    @Override public void refreshMetadata(Long id) { }
    @Override public void refreshAllMetadata(Long companyId) { }
    @Override public boolean hasAccess(Long id, Long userId) { return false; }
    @Override public boolean hasAccess(Long id, Long userId, Long companyId) { return false; }
    @Override public boolean canEdit(Long id, Long userId) { return false; }
    @Override public boolean canDelete(Long id, Long userId) { return false; }
    @Override public boolean canApprove(Long id, Long userId) { return false; }
    @Override public void setPermissions(Long id, Map<String, Object> permissions) { }
    @Override public Map<String, Object> getPermissions(Long id) { return Collections.emptyMap(); }
    @Override public List<MediaDto> importFromUrl(List<String> urls, Long companyId, Long uploadedBy) { return Collections.emptyList(); }
    @Override public MediaDto importFromUrl(String url, Long companyId, Long uploadedBy, String description) { return null; }
    @Override public void exportToCloud(Long companyId, String cloudProvider, Map<String, Object> config) { }
    @Override public void exportSelection(List<Long> ids, String format, String destination) { }
    @Override public boolean existsByMediaCode(String mediaCode) { return mediaRepository.existsByMediaCode(mediaCode); }
    @Override public boolean existsByStoredFilename(String storedFilename) { return mediaRepository.existsByStoredFilename(storedFilename); }
    @Override public boolean existsByFileChecksum(String fileChecksum) { return mediaRepository.existsByFileChecksum(fileChecksum); }
    @Override public boolean existsByCompanyIdAndStoredFilename(Long companyId, String filename) { return mediaRepository.existsByCompanyIdAndStoredFilename(companyId, filename); }
}