package server.controller;

import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FilenameFilter;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletResponse;

import org.apache.tomcat.util.http.fileupload.FileUtils;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.json.JSONException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.InputStreamResource;
import org.springframework.core.io.Resource;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import server.compiler.java.JavaCompiler;
import server.generator.Generator;
import server.generator.java.JavaGenerator;
import server.parser.Parser;
import server.project.ParsedProgram;
import server.utility.Compressor;

@RestController
public class RequestHandlerController {
	@Autowired
	@Qualifier("javagenerator")
	private Generator generator;
	@Autowired
	@Qualifier("javacompiler")
	private server.compiler.Compiler compiler;
	
	@Value("${upload.location}")
	private String uploadFolder;
	
	@RequestMapping(value = "/generate", consumes = "application/json", produces = "application/zip")
	public ResponseEntity<?> HandleGeneratorRequest(HttpEntity<String> httpEntity) {
		String IdReq = UUID.randomUUID().toString();
		String json = httpEntity.getBody();
		//Lista per la memorizzazione degli errori
		List<String> errors = new ArrayList<String>();
		String folderPath = uploadFolder+IdReq;//System.getProperty("catalina.base") + "/webapps/Uploads/" + IdReq;
		createDirectory(folderPath);
		
		Parser parser = new Parser();
		ParsedProgram parsedProgram = null;
		
		try{parsedProgram = parser.createParsedProgram(json);}
		catch(JSONException exception){
			errors.add(exception.getMessage());
		}
		List<String> parserErrors = parser.getErrors();
		if(!parserErrors.isEmpty()){
			errors.addAll(parserErrors);
		}
		else{
			try{
				generator.generate(folderPath, parsedProgram);
			    errors.addAll(compiler.compile(folderPath));
			}
			catch(IOException exception){errors.add(exception.getMessage());}
			Compressor compressor = new Compressor();
			try{ compressor.zip(folderPath);}
			catch(IOException exception){errors.add(exception.getMessage());}
		}
		byte[] ba = null;

		try {
			ba = Files.readAllBytes(Paths.get(folderPath + "/projectzip.zip"));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			// e.printStackTrace();
			errors.add(e.getMessage());
		}
		
		// It should return a Request object containing the zip just created.
		// This will be implemented later.
		if(errors.size()>0){
			return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(errors.toString());
		}
		else{
			return ResponseEntity.ok(ba);
		}
	}
	
	private void createDirectory(String pathFolder){
		File folder = new File(pathFolder);
		if(folder.exists()){
			try {
				System.err.println("sto pulendo la cartella");
				FileUtils.cleanDirectory(folder);
			} catch (IOException e) {
				//e.printStackTrace();
			}
		}
		else{
			boolean isDirectoryCreated = folder.mkdir();
			if (!isDirectoryCreated) {
				try {
					FileUtils.forceDelete(folder);
				} catch (IOException e) {
					e.printStackTrace();
				}
				folder.mkdir();
			}
		}
	}
}
	

@@ -477,47 +477,8 @@
 m;%0A%0A
-import javax.servlet.http.HttpServlet;%0A
 impo

Revert "fix import"