package jcgp.backend.parsers;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.util.Scanner;

import jcgp.backend.resources.ModifiableResources;

public abstract class ParameterParser {

	public static void parseParameters(File file, ModifiableResources resources) {
		
		FileReader fr;
		try {
			fr = new FileReader(file);
		} catch (FileNotFoundException e) {
			resources.println("[Parser] Error: could not find " + file.getAbsolutePath() + ".");
			return;
		}
		
		Scanner in = new Scanner(fr);
		resources.println("[Parser] Parsing file: " + file.getAbsolutePath() + "...");
		
		while (in.hasNextLine()) {
			String[] splitString = in.nextLine().split("( |\t)+");
			
			switch (splitString[1]) {
			case "population_size":
				resources.setPopulationSize(Integer.parseInt(splitString[0]));
				resources.println("[Parser] Population size is now " + resources.populationSize() + ".");
				break;
				
			case "num_generations":
				resources.setGenerations(Integer.parseInt(splitString[0]));
				resources.println("[Parser] Total generations is now " + resources.generations() + ".");
				break;
				
			case "num_runs_total":
				resources.setRuns(Integer.parseInt(splitString[0]));
				resources.println("[Parser] Total runs is now " + resources.runs() + ".");
				break;
				
			case "num_rows":
				resources.setRows(Integer.parseInt(splitString[0]));
				resources.println("[Parser] Row number is now " + resources.rows() + ".");
				break;
				
			case "num_cols":
				resources.setColumns(Integer.parseInt(splitString[0]));
				resources.println("[Parser] Column number is now " + resources.columns() + ".");
				break;

			case "levels_back":
				resources.setLevelsBack(Integer.parseInt(splitString[0]));
				resources.println("[Parser] Levels back is now " + resources.levelsBack() + ".");
				break;
			
			case "report_interval":
				resources.setReportInterval(Integer.parseInt(splitString[0]));
				resources.println("[Parser] Report interval is now " + resources.levelsBack() + ".");
				break;
			
			case "global_seed":
				resources.setSeed(Integer.parseInt(splitString[0]));
				resources.println("[Parser] Seed is now " + resources.seed() + ".");
				break;
				
			default:
				break;
			}
		}
		
		in.close();
		resources.println("[Parser] Finished parsing parameters.");
	}
}