import foundation.pEp.jniadapter.*;
import java.util.Vector;
import java.net.URL;
import java.net.URLClassLoader;
import java.lang.Thread;
import java.lang.InterruptedException;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;


/*
This test is trying to reproduce the problem described in JNI-88
https://pep.foundation/jira/browse/JNI-88

During the start up of the (banking-)connector we can see this behavior:
```
java: throw_pEp_exception.cc:268: jint pEp::JNIAdapter::throw_pEp_Exception(JNIEnv*, PEP_STATUS): Assertion `ex' failed.

Aborted (core dumped)
```
We try to set OwnId simultaneously from two threads(with two different engine instances). There is also high load on the system (pEp-unreleted).

Tuning tracing on in pgp_sequoia.c reveals this:
```
15:02 < jonas> cert_find: (339945131124ECCBD16D46104F470C66E44B21E4, 0)
15:02 < jonas> key_load: -> PEP_KEY_NOT_FOUND
15:02 < jonas> cert_find: Looking up 339945131124ECCBD16D46104F470C66E44B21E4: PEP_KEY_NOT_FOUND
15:02 < jonas> cert_find: (339945131124ECCBD16D46104F470C66E44B21E4, 0) -> PEP_KEY_NOT_FOUND
15:02 < jonas> cert_save: Saving certificate: database is locked: PEP_UNKNOWN_ERROR
15:02 < jonas> cert_save: (339945131124ECCBD16D46104F470C66E44B21E4) -> PEP_UNKNOWN_ERROR
15:02 < jonas> pgp_generate_keypair: saving TSK: PEP_CANNOT_CREATE_KEY
15:02 < jonas> pgp_generate_keypair: -> PEP_CANNOT_CREATE_KEY
15:02 < jonas> cert_save: (1863F66D52A7E79B69DBFCD84EB613332303DE33) -> PEP_STATUS_OK

[11:14] <       dietz> | Schreib' Dir einfach was, das aus ein paar threads zyklisch myself() ruft (für jeweils neue Identitäten).
[11:14] <       dietz> | Sollte nach wenigen Sekunden krachen.
[11:15] <       dietz> | Wobei fdik in #dev meinte, wir dürfen myself() nicht parallel rufen. Scherzkeks.
[11:15] <       dietz> | Spätestens beim plugin *müssen* wir aus zwei Prozessen auf die DB lesen und schreiben.
*/

class TestThread extends Thread {
    private String threadName;
    private int numIter = 1000000000;
    private Engine e;
    private Identity i1;

    TestThread( String name) {
        threadName = name;
        try {
            e = new Engine();
            i1 = new Identity();
            i1.user_id = "pEp_own_userId";
            i1.me = true;
            i1.username = "tTest User";
            i1.address = "hulu@hu.hu";
        }
        catch (pEpException ex) {
            System.out.println(threadName + ": cannot load");
            System.exit(0);
            return;
        }
        System.out.println(threadName + ": Engine loaded");
    }

    private void testMyself() {
        System.out.print("testMyself: -> ");
        i1 = e.myself(i1);
        System.out.println(i1.fpr);
    }

    private void testMyselfWithName(String name) {
        System.out.print("testMyselfWithName: " + name + " -> ");
        Identity i2 = new Identity();
        i2.me = true;
        i2.user_id = name;
        i2.username = name;
        i2.address = name + "@test.org";
        i2 = e.myself(i2);
        System.out.println("FPR: " + i2.fpr);
    }

    public void run() {
        try {
            for(int i = 0; i < numIter; i++) {
//                testMyself();
                testMyselfWithName(threadName + Integer.toString(i));
//                Thread.sleep(0);
            }
        } catch (Exception e) {
            System.out.println("Exception in Thread " + threadName);
            System.out.println(e.toString());
            System.exit(0);
        }
    }
}

class JNI_88 {
    public static void main(String[] args) {
        int numThreads = 2;
        Vector<Thread> vecT = new Vector<Thread>();
        System.out.println("Creating num threads: " + numThreads);

        for(int i=0; i < numThreads; i++) {
            String tName = "Thread-" + String.valueOf(i);
            System.out.println("Creating Thread: " + tName);
            vecT.add(new TestThread(tName));
        }

        System.out.println("num threads created: " + vecT.size());

        for(Thread t : vecT) {
            System.out.println("Starting Thread: " + t.getName());
            t.start();
        }
    }
}