#include <QMessageBox>
#include "editortrainees.h"
#include "ui_editortrainees.h"
#include "dialogeditgroup.h"
#include "dialogedittrainee.h"

EditorTrainees::EditorTrainees(DataBaseTrainees* db, bool adminMode, QWidget *parent) :
    TraineesView(db, CommonView::TypeView::control, adminMode, parent),
    ui(new Ui::EditorTrainees)
{
    ui->setupUi((QDialog*)this);

    preparationTreeWidget(ui->treeWidget);
    setNotLoggedInVisible(true);
    loadTraineesFromDB();
}

EditorTrainees::~EditorTrainees()
{
    delete ui;
}

void EditorTrainees::on_btnNewGroup_clicked()
{
    int id = dbTrainees->newGroup();
    loadTraineesFromDB();
    setCurrentGroup(id);
}

void EditorTrainees::on_btnDeleteGroup_clicked()
{
    QTreeWidgetItem *treeItemCurrent = ui->treeWidget->currentItem();

    if(treeItemCurrent != nullptr)
    {
        QTreeWidgetItem *treeItemParent = treeItemCurrent->parent();
        if(treeItemParent == nullptr)
        {//Выбрана группа
            int id_group = treeItemCurrent->text(0).toInt();

            if(dbTrainees->getListTraineesInGroup(id_group).count() > 0)
            {
                QMessageBox::critical(this, tr("Editing error!"), tr("The group is not empty.\nIt is not possible to delete a non-empty group."));
                return;
            }
            else
            {//Пустая группа
                if(int id = dbTrainees->deleteGroup(id_group))
                {//Удалено
                    loadTraineesFromDB();
                }
                else
                {
                    //Ошибка удаления
                }
            }
        }
    }
}

void EditorTrainees::on_btnNewTrainee_clicked()
{
    QTreeWidgetItem *treeItemCurrent = ui->treeWidget->currentItem();

    if(treeItemCurrent != nullptr)
    {
        QTreeWidgetItem *treeItemParent = treeItemCurrent->parent();
        if(treeItemParent == nullptr)
        {//Выбрана группа. Можно добавить Обучаемого
            int id_group = treeItemCurrent->text(0).toInt();
            if(int id = dbTrainees->newTrainee(id_group))
            {
                loadTraineesFromDB();
                setCurrentGroup(id_group);
            }
            else
            {
                //Ошибка добавления
            }
        }
    }
}

void EditorTrainees::on_btnDeleteTrainee_clicked()
{
    QTreeWidgetItem *treeItemCurrent = ui->treeWidget->currentItem();

    if(treeItemCurrent != nullptr)
    {
        QTreeWidgetItem *treeItemParent = treeItemCurrent->parent();
        if(treeItemParent != nullptr)
        {//Выбран обучаемый

            int id_trainee = treeItemCurrent->text(0).toInt();
            int id_group = treeItemParent->text(0).toInt();

            if(QMessageBox::warning(this, tr("Attention!"), tr("The deletion will be irrevocable.\nDelete anyway?"), QMessageBox::Ok, QMessageBox::Cancel) == QMessageBox::Ok)
            {
                if(int id = dbTrainees->deleteTrainee(id_trainee))
                {//Удалено
                    loadTraineesFromDB();
                    setCurrentGroup(id_group);
                }
                else
                {
                    //Ошибка удаления
                }
            }
        }
    }
}

void EditorTrainees::on_btnToOrFromArchiveTrainee_clicked()
{
    QTreeWidgetItem *treeItemCurrent = ui->treeWidget->currentItem();

    if(treeItemCurrent != nullptr)
    {
        QTreeWidgetItem *treeItemParent = treeItemCurrent->parent();
        if(treeItemParent != nullptr)
        {//Выбран обучаемый

            int id_trainee = treeItemCurrent->text(0).toInt();

            Trainee trainee = dbTrainees->getTrainee(id_trainee);

            if(trainee.getArchived())
            {//Архивный
                trainee.setArchived(false);
                if(int id = dbTrainees->editTrainee(trainee))
                {//Отредактировано
                    loadTraineesFromDB();
                    setCurrentTrainee(id);
                }
                else
                {
                    //Ошибка редактирования
                }
            }
            else
            {//Не Архивный
                trainee.setArchived(true);
                if(int id = dbTrainees->editTrainee(trainee))
                {//Отредактировано
                    if(!archiveVisible)
                        ui->btnArchive->click();

                    loadTraineesFromDB();
                    setCurrentTrainee(id);
                }
                else
                {
                    //Ошибка редактирования
                }
            }
        }
    }
}

void EditorTrainees::on_btnEdit_clicked()
{
    QTreeWidgetItem *treeItemCurrent = ui->treeWidget->currentItem();

    if(treeItemCurrent == nullptr)
        return;

    QTreeWidgetItem *treeItemParent = treeItemCurrent->parent();
    if(treeItemParent == nullptr)
    {//Выбрана группа

        int id_group = treeItemCurrent->text(0).toInt();

        DialogEditGroup dlg(this);
        dlg.setGroup(dbTrainees->getGroup(id_group));

        switch( dlg.exec() )
        {
        case QDialog::Accepted:
        {
            if(int id = dbTrainees->editGroup(dlg.getGroup()))
            {//Отредактировано
                loadTraineesFromDB();
                setCurrentGroup(id);
            }
            else
            {
                //Ошибка редактирования
            }

            break;
        }
        case QDialog::Rejected:
            break;
        default:
            break;
        }
    }
    else
    {//Выбран обучаемый

        int id_trainee = treeItemCurrent->text(0).toInt();

        DialogEditTrainee dlg(this);
        dlg.setTrainee(dbTrainees->getTrainee(id_trainee));

        switch( dlg.exec() )
        {
        case QDialog::Accepted:
            {
                if(int id = dbTrainees->editTrainee(dlg.getTrainee()))
                {//Отредактировано
                    loadTraineesFromDB();
                    setCurrentTrainee(id);
                }
                else
                {
                    //Ошибка редактирования
                }

                break;
            }
        case QDialog::Rejected:
            break;
        default:
            break;
        }
    }
}

void EditorTrainees::on_btnArchive_clicked()
{
    bool state = ui->btnArchive->isChecked();
    setArchiveVisible(state);
    loadTraineesFromDB();
}

void EditorTrainees::on_treeWidget_currentItemChanged(QTreeWidgetItem *current, QTreeWidgetItem *previous)
{
    //Определяем доступность и функционал кнопок для выбранного элемента

    if(current == nullptr)
        return;

    QTreeWidgetItem *treeItemParent = current->parent();
    if(treeItemParent == nullptr)
    {//Выбрана группа
        int id_group = current->text(0).toInt();

        if(adminMode)
        {
            ui->btnNewGroup->setEnabled(true);

            if(dbTrainees->getListTraineesInGroup(id_group).count() > 0)
            {//Группа не пуста
                ui->btnDeleteGroup->setEnabled(false);
            }
            else
            {//Группа пуста
                ui->btnDeleteGroup->setEnabled(true);
            }
        }
        else
        {
            ui->btnNewGroup->setEnabled(false);
            ui->btnDeleteGroup->setEnabled(false);
        }

        ui->btnNewTrainee->setEnabled(true);
        ui->btnDeleteTrainee->setEnabled(false);
        ui->btnToOrFromArchiveTrainee->setEnabled(false);
        ui->btnEdit->setEnabled(true);
        ui->btnArchive->setEnabled(true);

        ui->btnToOrFromArchiveTrainee->setText(tr("To archive"));
        ui->btnToOrFromArchiveTrainee->setIcon(QIcon(QStringLiteral(":/icons/traineeArchive.png")));
    }
    else
    {//Выбран обучаемый
        int id_trainee = current->text(0).toInt();

        ui->btnNewGroup->setEnabled(false);
        ui->btnDeleteGroup->setEnabled(false);
        ui->btnNewTrainee->setEnabled(false);        

        if(dbTrainees->isArchived(id_trainee))
        {//Архивный
            ui->btnDeleteTrainee->setEnabled(true);

            ui->btnToOrFromArchiveTrainee->setText(tr("From archive"));
            ui->btnToOrFromArchiveTrainee->setIcon(QIcon(QStringLiteral(":/icons/traineeFromArchive.png")));
        }
        else
        {//Не Архивный
            ui->btnDeleteTrainee->setEnabled(false);

            ui->btnToOrFromArchiveTrainee->setText(tr("To archive"));
            ui->btnToOrFromArchiveTrainee->setIcon(QIcon(QStringLiteral(":/icons/traineeArchive.png")));
        }

        ui->btnToOrFromArchiveTrainee->setEnabled(true);

        ui->btnEdit->setEnabled(true);
        ui->btnArchive->setEnabled(true);
    }
}

void EditorTrainees::setCurrentGroup(int id)
{
    for(int i = 0; i < treeWidget->topLevelItemCount(); i++)
    {
        QTreeWidgetItem * item = treeWidget->topLevelItem(i);
        if(item != nullptr)
            if(item->text(0).toInt() == id)
            {
                treeWidget->setCurrentItem(item);
                break;
            }
    }
}

void EditorTrainees::setCurrentTrainee(int id)
{
    for(int i = 0; i < treeWidget->topLevelItemCount(); i++)
    {
        QTreeWidgetItem * item = treeWidget->topLevelItem(i);
        if(item != nullptr)
        {
            for (int j = 0; j < item->childCount(); j++)
            {
                QTreeWidgetItem * itemChild = item->child(j);
                if(itemChild != nullptr)
                    if(itemChild->text(0).toInt() == id)
                    {
                        treeWidget->setCurrentItem(itemChild);
                        break;
                    }
            }//for (int j = 0; j < item->childCount(); j++)
        }
    }//for(int i = 0; i < treeWidget->topLevelItemCount(); i++)
}