#include "mainwindow.h"
#include "ui_mainwindow.h"

#include "statusbarwidget.h"
#include "verticalpreviewwidget.h"

#include <QDesktopServices>
#include <QFileSystemModel>
#include <QUrl>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
    , m_fsmodel(new QFileSystemModel)
    , m_previewWidget(new VerticalPreviewWidget)
{
    ui->setupUi(this);

    ui->cdUpButton->setIcon(qApp->style()->standardIcon(QStyle::SP_FileDialogToParent));

    m_fsmodel->setRootPath("");

    m_previewWidget->setModel(m_fsmodel);

    ui->columnView->setPreviewWidget(m_previewWidget);
    ui->columnView->setModel(m_fsmodel);
    ui->listView->setModel(m_fsmodel);
    ui->treeView->setModel(m_fsmodel);

    ui->treeTable->setModel(m_fsmodel);
    ui->treeTable->setItemsExpandable(false);
    ui->treeTable->setRootIsDecorated(false);

    ui->treeView->hideColumn(1);
    ui->treeView->hideColumn(2);
    ui->treeView->hideColumn(3);

    StatusbarWidget * sb = new StatusbarWidget();
    ui->statusbar->addPermanentWidget(sb);
    connect(sb, &StatusbarWidget::requestMode, this, [this](int mode){
        ui->stackedWidget->setCurrentIndex(mode);
    });

    connect(ui->listView, &QAbstractItemView::doubleClicked, this, &MainWindow::gotoModelIndexOrOpenFile);
    connect(ui->treeTable, &QAbstractItemView::doubleClicked, this, &MainWindow::gotoModelIndexOrOpenFile);
    connect(ui->columnView, &QAbstractItemView::clicked, this, &MainWindow::viewGotoModelIndex);
    connect(ui->columnView, &QAbstractItemView::doubleClicked, this, &MainWindow::gotoModelIndexOrOpenFile);
    connect(ui->columnView, &QColumnView::updatePreviewWidget, m_previewWidget, &VerticalPreviewWidget::updatePreviewContent);
}

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

void MainWindow::viewGotoModelIndex(const QModelIndex &index)
{
    if (!m_fsmodel->isDir(index)) {
        return;
    }

    ui->listView->setRootIndex(index);
    ui->treeTable->setRootIndex(index);

    QItemSelectionModel::SelectionFlags flags = QItemSelectionModel::Current;
    //             if (columnClicked->selectionModel()->isSelected(index))
    //                 flags |= QItemSelectionModel::Select;
    ui->columnView->selectionModel()->setCurrentIndex(index, flags);

    ui->addressEdit->setText(m_fsmodel->filePath(index));
}

void MainWindow::gotoModelIndexOrOpenFile(const QModelIndex &index)
{
    if (!m_fsmodel->isDir(index)) {
        QDesktopServices::openUrl(QUrl::fromLocalFile(m_fsmodel->filePath(index)));
    } else {
        viewGotoModelIndex(index);
    }
}

bool MainWindow::gotoUrl(const QString &path)
{
    if (!QFileInfo::exists(path)) {
        return false;
    }

    const QModelIndex &idx = m_fsmodel->index(path);
    if (idx.isValid()) {
        viewGotoModelIndex(idx);
        return true;
    }

    return false;
}

void MainWindow::on_treeView_clicked(const QModelIndex &index)
{
    if (!m_fsmodel->isDir(index)) {
        return;
    }
    ui->listView->setRootIndex(index);
    ui->treeTable->setRootIndex(index);
    ui->columnView->setRootIndex(index);
}

void MainWindow::on_cdUpButton_clicked()
{
    const QModelIndex &idx = ui->listView->rootIndex();
    if (!idx.parent().isValid()) {
        return;
    }

    viewGotoModelIndex(idx.parent());
}

void MainWindow::on_addressEdit_returnPressed()
{
    gotoUrl(ui->addressEdit->text());
}