#include "InstanceCreationTask.h"

#include <QDebug>
#include <QFile>

#include "Application.h"
#include "InstanceTask.h"
#include "minecraft/MinecraftLoadAndCheck.h"
#include "tasks/SequentialTask.h"

bool InstanceCreationTask::abort()
{
    if (!canAbort()) {
        return false;
    }

    m_abort = true;

    return InstanceTask::abort();
}

void InstanceCreationTask::executeTask()
{
    setAbortable(true);

    if (updateInstance()) {
        emitSucceeded();
        return;
    }

    // When the user aborted in the update stage.
    if (m_abort) {
        emitAborted();
        return;
    }

    auto instance = createInstance();
    if (!instance) {
        if (m_abort) {
            return;
        }

        qWarning() << "Instance creation failed!";
        if (!m_error_message.isEmpty()) {
            qWarning() << "Reason:" << m_error_message;
            emitFailed(tr("Error while creating new instance:\n%1").arg(m_error_message));
        } else {
            emitFailed(tr("Error while creating new instance."));
        }

        return;
    }

    // If this is set, it means we're updating an instance. So, we now need to remove the
    // files scheduled to, and we'd better not let the user abort in the middle of it, since it'd
    // put the instance in an invalid state.
    if (shouldOverride()) {
        bool deleteFailed = false;

        setAbortable(false);
        setStatus(tr("Removing old conflicting files..."));
        qDebug() << "Removing old files";

        for (const QString& path : m_filesToRemove) {
            if (!QFile::exists(path)) {
                continue;
            }

            qDebug() << "Removing" << path;

            if (!QFile::remove(path)) {
                qCritical() << "Could not remove" << path;
                deleteFailed = true;
            }
        }

        if (deleteFailed) {
            emitFailed(tr("Failed to remove old conflicting files."));
            return;
        }
    }

    if (!m_abort) {
        downloadFiles(instance.get());
    }
}