package io.gitlab.jfronny.inceptum.util;

import io.gitlab.jfronny.inceptum.Inceptum;
import io.gitlab.jfronny.inceptum.model.OSType;

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class ProcessUtils {
    public static boolean isProcessAlive(String pid) {
        return isProcessIdRunning(pid, OSCheck.OS == OSType.WINDOWS
                ? "cmd /c tasklist /FI \"PID eq " + pid + "\""
                : "ps -p " + pid);
    }


    private static boolean isProcessIdRunning(String pid, String command) {
        try {
            Runtime rt = Runtime.getRuntime();
            Process pr = rt.exec(command);

            InputStreamReader isReader = new InputStreamReader(pr.getInputStream());
            BufferedReader bReader = new BufferedReader(isReader);
            String strLine;
            while ((strLine= bReader.readLine()) != null) {
                if (strLine.contains(" " + pid + " ")) {
                    return true;
                }
            }
            return false;
        } catch (Exception e) {
            Inceptum.LOGGER.error("Could not get process state", e);
            return true;
        }
    }
}