#include <QFileDialog>

#include <properties/config.h>

#include "welcomedialog.h"
#include "ui_welcomedialog.h"
#include "recentprojectwidget.h"

namespace Ember {

WelcomeDialog::WelcomeDialog(ProjectManager* projectManager, QWidget *parent) :
    QDialog(parent),
    ui(new Ui::WelcomeDialog),
    m_projectManager(projectManager),
    m_originalPicture()
{
    ui->setupUi(this);
    m_originalPicture = QPixmap(*ui->picture->pixmap());
    setResult(Rejected);

    setupActions();
    populateProjects();
}

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

void WelcomeDialog::setupActions()
{
    connect(ui->buttonNewProject, &QCommandLinkButton::clicked, this, &WelcomeDialog::onNewProjectClicked);
    connect(ui->buttonOpenProject, &QCommandLinkButton::clicked, this, &WelcomeDialog::onOpenProjectClicked);
    connect(ui->listRecentProjects, &QListWidget::currentItemChanged, this, &WelcomeDialog::onProjectCurrentChanged);
    connect(ui->listRecentProjects, &QListWidget::itemActivated, this, &WelcomeDialog::onProjectActivated);
}

void WelcomeDialog::populateProjects()
{
    std::vector<RecentProject> projects;
    for (auto pair : m_projectManager->recentProjects())
        projects.push_back(pair.second);

    // Sort by pinned and access date
    std::sort(projects.begin(), projects.end(), [](const RecentProject& a, const RecentProject& b) -> bool
    {
        if (a.pinned == b.pinned)
            return a.access > b.access;

        return a.pinned > b.pinned;
    });

    // Add items
    for (auto& project : projects)
    {
        RecentProjectWidget* itemWidget = new RecentProjectWidget(project);
        connect(itemWidget, &RecentProjectWidget::pinToggled, this, &WelcomeDialog::onProjectPinned);
        connect(itemWidget, &RecentProjectWidget::deleted, this, &WelcomeDialog::onProjectDeleted);

        QListWidgetItem* item = new QListWidgetItem();
        item->setSizeHint(itemWidget->sizeHint());

        ui->listRecentProjects->addItem(item);
        ui->listRecentProjects->setItemWidget(item, itemWidget);
    }
}

void WelcomeDialog::resizeEvent(QResizeEvent*)
{
    QSize pictSize = ui->picture->size();
    QPixmap pictScaled = m_originalPicture.scaled(pictSize, Qt::KeepAspectRatioByExpanding, Qt::SmoothTransformation);
    ui->picture->setPixmap(pictScaled);
}

void WelcomeDialog::onNewProjectClicked()
{
    m_resultAction = NEW_PROJECT;
    accept();
}

void WelcomeDialog::onOpenProjectClicked()
{
    QString path = QFileDialog::getOpenFileName(this, tr("Open project"), "", buildFilterString());

    if (!path.isEmpty())
    {
        QByteArray str = path.toUtf8();
        m_openPath.assign(str.begin(), str.end());
        m_resultAction = OPEN_PROJECT;
        accept();
    }
}

void WelcomeDialog::onProjectPinned(const RecentProject& project, bool pinned)
{
    m_projectManager->pinRecentProject(project.path, pinned);
}

void WelcomeDialog::onProjectDeleted(const RecentProject& project)
{
    m_projectManager->deleteRecentProject(project.path);
    delete ui->listRecentProjects->takeItem(ui->listRecentProjects->currentRow());
}

void WelcomeDialog::onProjectCurrentChanged(QListWidgetItem *current, QListWidgetItem *previous)
{
    if (previous)
    {
        RecentProjectWidget* itemWidget = (RecentProjectWidget*) ui->listRecentProjects->itemWidget(previous);
        if (itemWidget)
            itemWidget->setSelected(false);
    }

    if (current)
    {
        RecentProjectWidget* itemWidget = (RecentProjectWidget*) ui->listRecentProjects->itemWidget(current);
        if (itemWidget)
            itemWidget->setSelected(true);
    }
}

void WelcomeDialog::onProjectActivated(QListWidgetItem *item)
{
    RecentProjectWidget* itemWidget = (RecentProjectWidget*) ui->listRecentProjects->itemWidget(item);
    if (itemWidget)
    {
        m_resultAction = OPEN_PROJECT;
        m_openPath = itemWidget->project().path;
        accept();
    }
}

QString WelcomeDialog::buildFilterString()
{
    static QString str;
    if (str.isEmpty())
    {
        str = QString("%1 (*%2);;%3 (*.*)").arg(
            tr("Project files"),
            EMBER_PROJECT_EXTENSION,
            tr("All files"));
    }

    return str;
}

boost::filesystem::path WelcomeDialog::openPath() const
{
    return m_openPath;
}

WelcomeDialog::ResultAction WelcomeDialog::resultAction() const
{
    return m_resultAction;
}

}