package TestingSystem.DVM;
import Common.Constants;
import Common.Global;
import Common.Utils.Utils;
import GlobalData.RemoteFile.RemoteFile;
import GlobalData.Tasks.TaskState;
import TestingSystem.Common.TasksPackageState;
import TestingSystem.DVM.DVMTasks.DVMCompilationTask;
import TestingSystem.DVM.DVMTasks.DVMRunTask;
import Visual_DVM_2021.Passes.All.UnzipFolderPass;
import javafx.util.Pair;
import org.apache.commons.io.FileUtils;

import java.io.File;
import java.nio.file.Paths;
import java.util.*;
public class RemoteDVMTestingPlanner extends DVMTestingPlanner {
    RemoteFile packageRemoteWorkspace = null;
    public RemoteDVMTestingPlanner(String... args) {
        super(args);
    }
    @Override
    protected boolean Connect() {
        if (user.connection == null) {
            try {
                user.connection = new UserConnection(machine, user);
                Print("Соединение c " + machine.getURL() + " " + user.login + " успешно установлено.");
                Print("Проверка инициализации..");
                user.connection.CheckUserInitialization(testingPackage.sender_address);
            } catch (Exception ex) {
                Print(ex.toString());
                user.connection = null;
                Print("Не удалось установить соединение.");
            }
        }
        return user.connection != null;
    }
    @Override
    protected void Disconnect() {
        if (user.connection != null) {
            user.connection.Disconnect();
            user.connection = null;
            Print("Соединение c " + machine.getURL() + " " + user.login + " сброшено.");
        }
    }
    //----
    @Override
    protected void TestsSynchronize() throws Exception {
        System.out.println("--");
        testingPackage.readJson();
        System.out.println("+");
        LinkedHashMap<Integer, File> tests = getTestsFromJson();
        //синхронизировать их.
        for (int test_id : tests.keySet()) {
            System.out.println("test="+test_id);
            File test = tests.get(test_id);
            RemoteFile test_dst = new RemoteFile(testingPackage.user_workspace + "/projects/" + test_id, true);
            user.connection.MKDIR(test_dst);
            user.connection.SynchronizeSubDirsR(test, test_dst);
        }
        System.out.println("++");
    }
    @Override
    protected void PackageWorkspaceCreation() throws Exception {
        System.out.println("package workspace creation");
        if (!CheckModules()) {
            return;
        }
        System.out.println("modules checked");
        //--
        testingPackage.readJson();
        //--
        LinkedHashMap<Integer, File> tests = getTestsFromJson();
        //создать папку для пакета.
        user.connection.sftpChannel.mkdir(packageRemoteWorkspace.full_name);
        //положить туда запакованные тексты задач.
        Vector<String> compilationLines = new Vector<>();
        Vector<String> runLines = new Vector<>();
        for (DVMCompilationTask compilationTask : testingPackage.package_json.compilationTasks) {
            String makefileText = generateMakefile(tests.get(compilationTask.test_id), compilationTask.language, testingPackage.drv, compilationTask.flags);
            compilationLines.addAll(compilationTask.pack(makefileText));
            for (DVMRunTask runTask : compilationTask.runTasks)
                runLines.addAll(runTask.pack(null));
        }
        RemoteFile compilationPackage = new RemoteFile(packageRemoteWorkspace, "compilationTasks");
        RemoteFile runPackage = new RemoteFile(packageRemoteWorkspace, "runTasks");
        user.connection.writeToFile(String.join("\n", compilationLines) + "\n", compilationPackage);
        user.connection.writeToFile(String.join("\n", runLines) + "\n", runPackage);
        // --
        user.connection.MKDIR(new RemoteFile(packageRemoteWorkspace, "state"));
    }
    @Override
    protected void AnalyseResults() throws Exception {
        testingPackage.readJson();
        Print("analysing results");
        Vector<DVMRunTask> runTasks = new Vector<>();
        for (DVMCompilationTask compilationTask : testingPackage.package_json.compilationTasks)
            runTasks.addAll(compilationTask.runTasks);
        //----
        getTasksInfo(testingPackage.package_json.compilationTasks, "CompilationInfo.txt");
        getTasksInfo(runTasks, "RunningInfo.txt");
        //--
        int ct_count = 0;
        int rt_count = 0;
        //--
        for (DVMCompilationTask compilationTask : testingPackage.package_json.compilationTasks) {
            compilationTask.dvm_package_id = testingPackage.id;
            ct_count++;
            File ct_workspace = Paths.get(packageLocalWorkspace.getAbsolutePath(), "results", String.valueOf(compilationTask.id)).toFile();
            if (ct_workspace.exists()) {
                for (DVMRunTask runTask : compilationTask.runTasks) {
                    runTask.dvm_package_id = testingPackage.id;
                    rt_count++;
                    runTask.compilation_state = compilationTask.state;
                    runTask.compilation_time = compilationTask.Time;
                    if (compilationTask.state == TaskState.DoneWithErrors) {
                        runTask.state = TaskState.Canceled;
                    } else {
                        File rt_workspace = Paths.get(packageLocalWorkspace.getAbsolutePath(), "results", String.valueOf(runTask.id)).toFile();
                        if (rt_workspace.exists() && runTask.state.equals(TaskState.Finished)) {
                            //анализ задачи на запуск.
                            File outFile = new File(rt_workspace, Constants.out_file);
                            File errFile = new File(rt_workspace.getAbsolutePath(), Constants.err_file);
                            //--
                            String output = FileUtils.readFileToString(outFile);
                            String errors = FileUtils.readFileToString(errFile);
                            //--
                            List<String> output_lines = Arrays.asList(output.split("\n"));
                            List<String> errors_lines = Arrays.asList(errors.split("\n"));
                            //---
                            if (Utils.isCrushed(output_lines, errors_lines)) {
                                runTask.state = TaskState.Crushed;
                            } else {
                                Pair<TaskState, Integer> results = new Pair<>(TaskState.Done, 100);
                                switch (runTask.test_type) {
                                    case Correctness:
                                        results = Utils.analyzeCorrectness(output_lines);
                                        break;
                                    case Performance:
                                        results = Utils.analyzePerformance(output_lines);
                                        break;
                                    default:
                                        break;
                                }
                                runTask.state = results.getKey();
                                runTask.progress = results.getValue();
                                runTask.CleanTime = Utils.parseCleanTime(output);
                            }
                        }
                    }
                }
            }
        }
        testingPackage.progress = 100;
        testingPackage.saveJson(); //запись обновленных результатов пакета в json!
        Print("analysis done, ct_count=" + ct_count + " rt count=" + rt_count);
    }
    @Override
    protected void PackageStart() throws Exception {
        String plannerStartCommand = String.join(" ",
                Utils.DQuotes(getPlanner()),
                Utils.DQuotes(user.workspace),
                Utils.DQuotes(packageRemoteWorkspace.full_name),
                Utils.DQuotes(testingPackage.kernels),
                Utils.DQuotes(testingPackage.drv));
        user.connection.startShellProcess(packageRemoteWorkspace, "planner_output",
                "ulimit -s unlimited", plannerStartCommand);
        //---
        RemoteFile PID = new RemoteFile(packageRemoteWorkspace, "PID");
        while (!user.connection.Exists(PID)) {
            Print("PID not found");
            Utils.sleep(1000);
        }
        testingPackage.PID = user.connection.readFromFile(PID).replace("\n", "").replace("\r", "");
        //---
        System.out.println("PID=" + Utils.Brackets(testingPackage.PID));
        RemoteFile STARTED = new RemoteFile(packageRemoteWorkspace, "STARTED");
        while (!user.connection.Exists(STARTED)) {
            Print("waiting for package start...");
            Utils.sleep(1000);
        }
    }
    @Override
    protected boolean CheckNextState() throws Exception {
        boolean progress_changed = false;
        boolean state_changed = false;
        RemoteFile progress = new RemoteFile(packageRemoteWorkspace, "progress");
        if (user.connection.Exists(progress)) {
            String s = user.connection.readFromFile(progress);
            int current_progress = Integer.parseInt(s);
            if (current_progress != testingPackage.progress) {
                Print("progress changed: " + current_progress);
                testingPackage.progress = current_progress;
                progress_changed = true;
            }
        }
        RemoteFile stateDir = new RemoteFile(packageRemoteWorkspace, "state");
        //состояния пакета могут меняться только по возрастанию. ищем, появилось ли такое.
        Vector<TasksPackageState> higherStates = testingPackage.state.getHigherStates();
        Collections.reverse(higherStates); //берем в обратном порядке, чтобы быстрее найти высшее.
        for (TasksPackageState state : higherStates) {
            RemoteFile file = new RemoteFile(stateDir, state.toString());
            if (user.connection.Exists(file)) {
                Print("found new state: " + file.name);
                testingPackage.state = state;
                state_changed = true;
                break;
            }
        }
        //--
        user.connection.iterations++;
        if (user.connection.iterations == 100) {
            Disconnect();
        }
        //--
        return progress_changed || state_changed;
    }
    @Override
    protected void DownloadResults() throws Exception {
        Utils.CheckDirectory(packageLocalWorkspace);
        RemoteFile remote_results_archive = new RemoteFile(packageRemoteWorkspace, "results.zip");
        File results_archive = new File(packageLocalWorkspace, "results.zip");
        user.connection.performScript(packageRemoteWorkspace, "zip -r " + Utils.DQuotes("results.zip") + " " + Utils.DQuotes("results"));
        //---
        if (user.connection.Exists(remote_results_archive)) {
            user.connection.getSingleFile(remote_results_archive.full_name, results_archive.getAbsolutePath());
            UnzipFolderPass unzipFolderPass = new UnzipFolderPass();
            unzipFolderPass.Do(results_archive.getAbsolutePath(), packageLocalWorkspace.getAbsolutePath(), false);
        }
        //---
        if (Global.properties.eraseTestingWorkspaces && user.connection.Exists(packageRemoteWorkspace))
            user.connection.RMDIR(packageRemoteWorkspace.full_name);
    }
    @Override
    protected void MachineConnectionError() {
        Finalize("Количество безуспешных попыток соединения с машиной " + machine.getURL() + " превысило 10");
    }
    @Override
    protected void Kill() throws Exception {
        if (!testingPackage.PID.isEmpty()) {
            user.connection.Command("kill -9 " + testingPackage.PID);
        }
    }
    @Override
    protected void InitSessionCredentials() {
        packageRemoteWorkspace = new RemoteFile(user.workspace + "/tests", String.valueOf(testingPackage.id), true);
        packageLocalWorkspace = new File(Global.DVMPackagesDirectory, String.valueOf(testingPackage.id));
    }
    @Override
    protected boolean CheckModules() throws Exception {
        String log = user.connection.CheckModulesVersion();
        if (!log.isEmpty()) {
            testingPackage.description = log;
            testingPackage.state = TasksPackageState.Aborted;
            return false;
        }
        return true;
    }
}