package com.mattrixwv.raidbuilder.service;


import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import java.util.UUID;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.multipart.MultipartFile;

import com.mattrixwv.raidbuilder.entity.GameClass;
import com.mattrixwv.raidbuilder.repository.class_group_game_class_xref.ClassGroupGameClassXrefRepository;
import com.mattrixwv.raidbuilder.repository.game_class.GameClassRepository;

import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;


@Slf4j
@Service
@Transactional(rollbackFor = Exception.class)
@RequiredArgsConstructor
public class GameClassService{
	private final GameClassRepository gameClassRepository;
	private final ClassGroupGameClassXrefRepository cggcXrefRepository;
	//Values
	@Value("${uploadFileDirectory}")
	private String uploadFileDirectory;


	//Write
	public GameClass createGameClass(GameClass gameClass, MultipartFile file){
		if(file != null){
			String fileName = UUID.randomUUID().toString() + "--" + file.getOriginalFilename();
			Path filePath = Paths.get(uploadFileDirectory + "/gameClassIcons").resolve(fileName);

			try{
				//file.transferTo(filePath);
				Files.copy(file.getInputStream(), filePath);
				gameClass.setGameClassIcon(fileName);
			}
			catch(Exception error){
				log.error("Error uploading file: " + error.getMessage(), error);
				throw new RuntimeException("Error uploading file: " + error.getMessage(), error);
			}
		}

		return gameClassRepository.save(gameClass);
	}

	public GameClass updateGameClass(GameClass gameClass, MultipartFile file){
		GameClass existingGameClass = gameClassRepository.findById(gameClass.getGameClassId()).orElse(null);

		//Delete the old file if one exists
		if((existingGameClass != null) && (existingGameClass.getGameClassIcon() != null) && (gameClass.getGameClassIcon() == null)){
			log.debug("Deleting old file: {}", existingGameClass.getGameClassIcon());
			File existingFile = new File(uploadFileDirectory + "/gameClassIcons/" + existingGameClass.getGameClassIcon());
			if(existingFile.exists()){
				existingFile.delete();
			}
		}

		if(file != null){
			//Upload the new file
			String fileName = UUID.randomUUID().toString() + "--" + file.getOriginalFilename();
			Path filePath = Paths.get(uploadFileDirectory + "/gameClassIcons").resolve(fileName);
			try{
				//file.transferTo(filePath);
				Files.copy(file.getInputStream(), filePath);
				gameClass.setGameClassIcon(fileName);
			}
			catch(Exception error){
				log.error("Error uploading file: " + error.getMessage(), error);
				throw new RuntimeException("Error uploading file: " + error.getMessage(), error);
			}
		}

		return gameClassRepository.save(gameClass);
	}

	public void deleteById(UUID gameClassId){
		GameClass gameClass = gameClassRepository.findById(gameClassId).orElse(null);
		if(gameClass != null){
			if(gameClass.getGameClassIcon() != null){
				File existingFile = new File(uploadFileDirectory + "/gameClassIcons/" + gameClass.getGameClassIcon());
				if(existingFile.exists()){
					existingFile.delete();
				}
			}
		}

		cggcXrefRepository.deleteAllByGameClassId(gameClassId);

		gameClassRepository.deleteById(gameClassId);
	}

	public void deleteByGameId(UUID gameId){
		List<GameClass> gameClasses = gameClassRepository.findAllByGameId(gameId);
		for(GameClass gameClass : gameClasses){
			if(gameClass.getGameClassIcon() != null){
				File existingFile = new File(uploadFileDirectory + "/gameClassIcons/" + gameClass.getGameClassIcon());
				if(existingFile.exists()){
					existingFile.delete();
				}
			}
		}

		cggcXrefRepository.deleteAllByGameClassIdIn(gameClasses.stream().map(GameClass::getGameClassId).toList());

		gameClassRepository.deleteByGameId(gameId);
	}


	//Read
	public GameClass getById(UUID gameClassId){
		return gameClassRepository.findById(gameClassId).orElse(null);
	}

	public List<GameClass> getByGameId(UUID gameId, int page, int pageSize){
		return gameClassRepository.findAllByGameId(gameId, PageRequest.of(page, pageSize, Sort.by("gameClassName").ascending()));
	}

	public List<GameClass> getByGameId(UUID gameId, int page, int pageSize, String searchTerm){
		return gameClassRepository.findAllByGameIdAndGameClassNameContainingIgnoreCase(gameId, searchTerm, PageRequest.of(page, pageSize, Sort.by("gameClassName").ascending()));
	}

	public List<GameClass> getByClassGroupId(UUID classGroupId){
		return gameClassRepository.findAllByClassGroupId(classGroupId);
	}

	public long countByGameId(UUID gameId){
		return gameClassRepository.countByGameId(gameId);
	}

	public long countByGameId(UUID gameId, String searchTerm){
		return gameClassRepository.countByGameIdAndGameClassNameContainingIgnoreCase(gameId, searchTerm);
	}
}