//************* Evaporate.java

package mainpkg;

public class Evaporate {

    public static void main(String[] args) {
        new StatusGenerator(2565, 3535, 20).generateAndPrint();
    }
}

// ***************** StatusGenerator.java


package mainpkg;

import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.util.Random;

public class StatusGenerator {

    private int minWeight;
    private int maxWeight;
    private int alertPercentage;
    private int weightRange;
    private int itemsToGenerate = 2160; // 90 days x 24 hours
    private int weekdayDelta = 20;
    private int weekendDelta = 5;
    private PrintWriter writer;

    public StatusGenerator(int minWeight, int maxWeight, int alertPercentage) {
        this.minWeight = minWeight;
        this.maxWeight = maxWeight;
        this.weightRange = maxWeight - minWeight;
        this.alertPercentage = alertPercentage;
    }

    public void generateAndPrint() {
        try {
            writer = new PrintWriter("C:\\UTN\\gas.txt", "UTF-8");  //FIXME ojo que esto está hardcodeado
        } catch (FileNotFoundException | UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        int currentValue = this.generateInitialValue();
        for (int rows = 0; rows < itemsToGenerate; rows++) {
            doPrint(currentValue);
            boolean isWeekend = rows % 168 < 120;
            currentValue = currentValue - new Random().nextInt(isWeekend ? weekendDelta : weekdayDelta) - 1;
            if (this.shouldRecharge(currentValue)) {
                currentValue = maxWeight;
            }
        }

        writer.close();
    }

    private boolean shouldRecharge(int currentValue) {
        if (currentValue <= minWeight + weekdayDelta) return true;
        if (isLow(currentValue) && new Random().nextInt(50) == 1) return true;
        return false;
    }

    private boolean isLow(int currentValue) {
        return currentValue - minWeight < weightRange * alertPercentage / 100;
    }

    private int generateInitialValue() {
        return new Random().nextInt(weightRange) + minWeight;
    }

    private void doPrint(int value) {
        writer.print(value + "\n");
    }

}