package com.ntlab.irisserver.models;

import org.springframework.stereotype.Component;

import java.io.*;
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.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import org.apache.catalina.core.ApplicationContext;
import com.ntlab.irisserver.utils.Base64Decode;
import org.apache.catalina.core.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.beans.BeansException;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Response;


@Component
public class KeywordManager {
    private static KeywordManager theInstance = null;
    String[] keywords = {"0"};
            /*= {"りんご",
    "ごりら","らっぱ","ぱんつ","つみき",};*/

    private List<String> FileRead(String path) {
        List<String> ss = new ArrayList<String>();

        try {
            BufferedReader buffReader =
                    new BufferedReader(new FileReader(path));
            String s;

            while ((s = buffReader.readLine()) != null) {
                ss.add(s);
            }
            buffReader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return ss;

    }
    
    public static KeywordManager getInstance() {
        if(theInstance == null) {
            theInstance = new KeywordManager();
        }
        return theInstance;
    }

    public String[] getKeywords(String path){
        var response = Response.status(Response.Status.NO_CONTENT);

        if(path == null){
            response.status(400).entity("パスがありません");
            throw new WebApplicationException(response.build());
        } else if(FileRead(path).size() == 0){
            response.status(400).entity(path+"に対応したファイルがありません");
            throw new WebApplicationException(response.build());
        } else {
            keywords = FileRead(path).toArray(new String[FileRead(path).size()]);
        }
        return keywords;
    }
}