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// Copyright (C) 2019 The Qt Company

package com.googlesource.gerrit.plugins.qtcodereview;

import static com.google.common.truth.Truth.assertThat;
import static com.google.gerrit.extensions.client.ListChangesOption.CURRENT_COMMIT;
import static com.google.gerrit.extensions.client.ListChangesOption.CURRENT_REVISION;
import static com.google.gerrit.extensions.client.ListChangesOption.DETAILED_LABELS;

import com.google.common.collect.Lists;
import com.google.gerrit.acceptance.LightweightPluginDaemonTest;
import com.google.gerrit.acceptance.PushOneCommit;
import com.google.gerrit.acceptance.RestResponse;
import com.google.gerrit.acceptance.TestAccount;
import com.google.gerrit.acceptance.TestPlugin;
import com.google.gerrit.acceptance.UseSsh;
import com.google.gerrit.extensions.common.ApprovalInfo;
import com.google.gerrit.extensions.common.ChangeInfo;
import com.google.gerrit.reviewdb.client.Change;

import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;

import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.LogManager;
import org.apache.log4j.PatternLayout;

import java.util.List;

import org.junit.Before;
import org.junit.Test;


@TestPlugin(
    name = "gerrit-plugin-qt-workflow",
    sysModule = "com.googlesource.gerrit.plugins.qtcodereview.QtModule",
    sshModule = "com.googlesource.gerrit.plugins.qtcodereview.QtSshModule"
)

@UseSsh
public class QtCodeReviewIT extends LightweightPluginDaemonTest {

    protected static final String R_HEADS = "refs/heads/";
    protected static final String R_STAGING = "refs/staging/";
    protected static final String R_PUSH = "refs/for/";

    protected static final String CONTENT_DATA = "hereisjustsomecontentforthecommits";

    @Before
    public void ReduceLogging() throws Exception {
        LogManager.resetConfiguration();

        final PatternLayout layout = new PatternLayout();
        layout.setConversionPattern("%-5p %c %x: %m%n");

        final ConsoleAppender dst = new ConsoleAppender();
        dst.setLayout(layout);
        dst.setTarget("System.err");
        dst.setThreshold(Level.INFO);
        dst.activateOptions();

        final Logger root = LogManager.getRootLogger();
        root.removeAllAppenders();
        root.addAppender(dst);
    }

    @Test
    public void pingSSHTest() throws Exception {
        assertThat(adminSshSession.exec("gerrit-plugin-qt-workflow ping")).contains("Pong");
        assertThat(adminSshSession.getError()).isNull();
    }


// Helper functions

    protected void QtDefer(PushOneCommit.Result c) throws Exception {
        RestResponse response = call_REST_API_Defer(c.getChangeId());
        response.assertOK();
        Change change = c.getChange().change();
        assertThat(change.getStatus()).isEqualTo(Change.Status.DEFERRED);
    }

    protected RestResponse call_REST_API_Defer(String changeId) throws Exception {
        String url = "/changes/"+changeId+"/gerrit-plugin-qt-workflow~defer";
        RestResponse response = userRestSession.post(url);
        return response;
    }

    protected void QtStage(PushOneCommit.Result c) throws Exception {
        RestResponse response = call_REST_API_Stage(c.getChangeId(), c.getCommit().getName());
        response.assertOK();
        Change change = c.getChange().change();
        assertThat(change.getStatus()).isEqualTo(Change.Status.STAGED);
        resetEvents();
    }

    protected RestResponse call_REST_API_Stage(String changeId, String revisionId) throws Exception {
        String url = "/changes/" + changeId + "/revisions/" + revisionId + "/gerrit-plugin-qt-workflow~stage";
        RestResponse response = userRestSession.post(url);
        return response;
    }

    protected PushOneCommit.Result pushCommit(String branch,
                                              String message,
                                              String file,
                                              String content)
                                              throws Exception {
        String pushRef = R_PUSH + branch;
        PushOneCommit.Result c = createUserChange(pushRef, message, file, content);
        Change change = c.getChange().change();
        assertThat(change.getStatus()).isEqualTo(Change.Status.NEW);
        return c;
    }

    protected PushOneCommit.Result amendCommit(String changeId) throws Exception {
        String branch = "master";
        String pushRef = R_PUSH + branch;
        PushOneCommit push = pushFactory.create(db,
                                                user.getIdent(),
                                                testRepo,
                                                PushOneCommit.SUBJECT,
                                                PushOneCommit.FILE_NAME,
                                                CONTENT_DATA,
                                                changeId);
        return push.to(pushRef);
    }

    protected PushOneCommit.Result createUserChange(String ref, String message, String file, String content) throws Exception {
        PushOneCommit push = pushFactory.create(db, user.getIdent(), testRepo, message, file, content);
        PushOneCommit.Result result = push.to(ref);
        result.assertOkStatus();
        return result;
    }

    protected void assertCherryPick(RevCommit head, RevCommit source, String cherrypickSHA) {
        assertThat(head.getName()).isEqualTo(cherrypickSHA);
        assertThat(head).isNotEqualTo(source);
        assertThat(cherrypickSHA).isNotEqualTo(source.getName());
        assertThat(head.getShortMessage()).isEqualTo(source.getShortMessage());
        assertThat(head.getFooterLines("Change-Id")).isEqualTo(source.getFooterLines("Change-Id"));
        assertThat(head.getParentCount()).isEqualTo(1);
    }

    protected void assertApproval(String changeId, TestAccount user) throws Exception {
        ChangeInfo c = gApi.changes().id(changeId).get(DETAILED_LABELS, CURRENT_REVISION, CURRENT_COMMIT);

        String label = "Code-Review";
        int expectedVote = 2;
        Integer vote = 0;
        if (c.labels.get(label) != null && c.labels.get(label).all != null) {
            for (ApprovalInfo approval : c.labels.get(label).all) {
                if (approval._accountId == user.id.get()) {
                    vote = approval.value;
                    break;
                }
            }
        }

        String name = "label = " + label;
        assertThat(vote).named(name).isEqualTo(expectedVote);
    }

    protected void assertRefUpdatedEvents(String refName, RevCommit ... expected) throws Exception {
        eventRecorder.assertRefUpdatedEvents(project.get(), refName, expected);
    }

    protected void resetEvents() {
        closeEventRecorder();
        startEventRecorder();
    }

    protected String getBranchNameFromRef(String refStr) {
        if (refStr.startsWith(R_HEADS)) {
            return refStr.substring(R_HEADS.length());
        } else {
            return refStr;
        }
    }

    protected String getCurrentPatchSHA(PushOneCommit.Result c) throws Exception {
        return c.getChange().currentPatchSet().getRevision().get();
    }

    protected List<RevCommit> getRemoteLog(String ref) throws Exception {
      try (Repository repo = repoManager.openRepository(project);
          RevWalk rw = new RevWalk(repo)) {
        rw.markStart(rw.parseCommit(repo.exactRef(ref).getObjectId()));
        return Lists.newArrayList(rw);
      }
    }

}