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package eu.unicore.uas.json;

import java.io.File;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.apache.commons.io.FileUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import eu.unicore.client.Job;

/**
 * Helper to convert a UNICORE job description in JSON to JSDL form 
 * 
 * @author schuller
 */
public class Builder {

	protected final List sweeps;

	protected final JSONObject json;

	protected final Setrequirements=new HashSet<>();

	protected boolean initialised;

	protected boolean isSweepJob=false;

	protected String preferredProtocol = "BFT";

	/**
	 * reads a JSON string from the supplied File
	 * and creates the builder from it
	 * 
	 * @param jsonFile
	 * @throws Exception
	 */
	public Builder(File jsonFile)throws Exception{
		this(FileUtils.readFileToString(jsonFile, "UTF-8"));
	}

	/**
	 * Creates the builder from the supplied JSON string
	 * 
	 * @param jsonString
	 * @throws IllegalArgumentException on JSON parsing errors
	 */
	public Builder(String jsonString) {
		sweeps = new ArrayList<>();
		try{
			json=JSONUtil.read(jsonString);
			isSweepJob = json.optBoolean("isSweepJob", false);
		}catch(JSONException ex){
			String message=JSONUtil.makeParseErrorMessage(jsonString, ex);
			throw new IllegalArgumentException(message);
		}
	}

	/**
	 * Creates an empty builder. All content has to be set via the API
	 * @throws Exception
	 */
	public Builder()throws Exception{
		this("{}");
		json.put("Output",".");
	}

	public JSONObject getJSON() {
		return json;
	}

	public String[] getTags(){
		JSONArray tags = json.optJSONArray("Tags");
		if(tags==null)tags = json.optJSONArray("tags");
		if(tags!=null){
			String[] ret = new String[tags.length()];
			for(int i=0;igetRequirements(){
		build();
		return requirements;
	}

	@Override
	public String toString(){
		return json.toString(2);
	}

	public boolean isSweepJob(){
		return isSweepJob;
	}

}