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/*
 *  nextpnr -- Next Generation Place and Route
 *
 *  Copyright (C) 2018  Miodrag Milanovic <miodrag@symbioticeda.com>
 *  Copyright (C) 2018  Serge Bazanski <q3k@symbioticeda.com>
 *
 *  Permission to use, copy, modify, and/or distribute this software for any
 *  purpose with or without fee is hereby granted, provided that the above
 *  copyright notice and this permission notice appear in all copies.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 */

#include <QAction>
#include <QCoreApplication>
#include <QFileDialog>
#include <QGridLayout>
#include <QIcon>
#include <QInputDialog>
#include <QSplitter>
#include <fstream>
#include "designwidget.h"
#include "fpgaviewwidget.h"
#include "jsonparse.h"
#include "jsonwrite.h"
#include "log.h"
#include "mainwindow.h"
#include "pythontab.h"

static void initBasenameResource() { Q_INIT_RESOURCE(base); }

NEXTPNR_NAMESPACE_BEGIN

BaseMainWindow::BaseMainWindow(std::unique_ptr<Context> context, CommandHandler *handler, QWidget *parent)
        : QMainWindow(parent), handler(handler), ctx(std::move(context)), timing_driven(false)
{
    initBasenameResource();
    qRegisterMetaType<std::string>();

    log_streams.clear();

    setObjectName("BaseMainWindow");
    resize(1024, 768);

    task = new TaskManager();

    // Create and deploy widgets on main screen
    QWidget *centralWidget = new QWidget(this);
    QGridLayout *gridLayout = new QGridLayout(centralWidget);
    gridLayout->setSpacing(6);
    gridLayout->setContentsMargins(11, 11, 11, 11);

    QSplitter *splitter_h = new QSplitter(Qt::Horizontal, centralWidget);
    QSplitter *splitter_v = new QSplitter(Qt::Vertical, splitter_h);
    splitter_h->addWidget(splitter_v);

    gridLayout->addWidget(splitter_h, 0, 0, 1, 1);

    setCentralWidget(centralWidget);

    designview = new DesignWidget();
    designview->setMinimumWidth(300);
    splitter_h->addWidget(designview);

    tabWidget = new QTabWidget();

    console = new PythonTab();
    tabWidget->addTab(console, "Console");

    centralTabWidget = new QTabWidget();
    centralTabWidget->setTabsClosable(true);

    fpgaView = new FPGAViewWidget();
    centralTabWidget->addTab(fpgaView, "Device");
    centralTabWidget->tabBar()->setTabButton(0, QTabBar::RightSide, 0);
    centralTabWidget->tabBar()->setTabButton(0, QTabBar::LeftSide, 0);

    splitter_v->addWidget(centralTabWidget);
    splitter_v->addWidget(tabWidget);

    // Connect Worker
    connect(task, &TaskManager::log, this, &BaseMainWindow::writeInfo);
    connect(task, &TaskManager::pack_finished, this, &BaseMainWindow::pack_finished);
    connect(task, &TaskManager::budget_finish, this, &BaseMainWindow::budget_finish);
    connect(task, &TaskManager::place_finished, this, &BaseMainWindow::place_finished);
    connect(task, &TaskManager::route_finished, this, &BaseMainWindow::route_finished);
    connect(task, &TaskManager::taskCanceled, this, &BaseMainWindow::taskCanceled);
    connect(task, &TaskManager::taskStarted, this, &BaseMainWindow::taskStarted);
    connect(task, &TaskManager::taskPaused, this, &BaseMainWindow::taskPaused);

    // Events for context change
    connect(this, &BaseMainWindow::contextChanged, task, &TaskManager::contextChanged);
    connect(this, &BaseMainWindow::contextChanged, console, &PythonTab::newContext);
    connect(this, &BaseMainWindow::contextChanged, fpgaView, &FPGAViewWidget::newContext);
    connect(this, &BaseMainWindow::contextChanged, designview, &DesignWidget::newContext);

    // Catch close tab events
    connect(centralTabWidget, &QTabWidget::tabCloseRequested, this, &BaseMainWindow::closeTab);

    // Propagate events from design view to device view
    connect(designview, &DesignWidget::selected, fpgaView, &FPGAViewWidget::onSelectedArchItem);
    connect(designview, &DesignWidget::zoomSelected, fpgaView, &FPGAViewWidget::zoomSelected);
    connect(designview, &DesignWidget::highlight, fpgaView, &FPGAViewWidget::onHighlightGroupChanged);
    connect(designview, &DesignWidget::hover, fpgaView, &FPGAViewWidget::onHoverItemChanged);

    // Click event on device view
    connect(fpgaView, &FPGAViewWidget::clickedBel, designview, &DesignWidget::onClickedBel);
    connect(fpgaView, &FPGAViewWidget::clickedWire, designview, &DesignWidget::onClickedWire);
    connect(fpgaView, &FPGAViewWidget::clickedPip, designview, &DesignWidget::onClickedPip);

    // Update tree event
    connect(this, &BaseMainWindow::updateTreeView, designview, &DesignWidget::updateTree);

    createMenusAndBars();
}

BaseMainWindow::~BaseMainWindow() { delete task; }

void BaseMainWindow::closeTab(int index) { delete centralTabWidget->widget(index); }

void BaseMainWindow::writeInfo(std::string text) { console->info(text); }

void BaseMainWindow::createMenusAndBars()
{
    // File menu / project toolbar actions
    QAction *actionExit = new QAction("Exit", this);
    actionExit->setIcon(QIcon(":/icons/resources/exit.png"));
    actionExit->setShortcuts(QKeySequence::Quit);
    actionExit->setStatusTip("Exit the application");
    connect(actionExit, &QAction::triggered, this, &BaseMainWindow::close);

    // Help menu actions
    QAction *actionAbout = new QAction("About", this);

    // Gile menu options
    actionNew = new QAction("New", this);
    actionNew->setIcon(QIcon(":/icons/resources/new.png"));
    actionNew->setShortcuts(QKeySequence::New);
    actionNew->setStatusTip("New project");
    connect(actionNew, &QAction::triggered, this, &BaseMainWindow::new_proj);

    actionLoadJSON = new QAction("Open JSON", this);
    actionLoadJSON->setIcon(QIcon(":/icons/resources/open_json.png"));
    actionLoadJSON->setStatusTip("Open an existing JSON file");
    actionLoadJSON->setEnabled(true);
    connect(actionLoadJSON, &QAction::triggered, this, &BaseMainWindow::open_json);

    actionSaveJSON = new QAction("Save JSON", this);
    actionSaveJSON->setIcon(QIcon(":/icons/resources/save_json.png"));
    actionSaveJSON->setStatusTip("Write to JSON file");
    actionSaveJSON->setEnabled(true);
    connect(actionSaveJSON, &QAction::triggered, this, &BaseMainWindow::save_json);

    // Design menu options
    actionPack = new QAction("Pack", this);
    actionPack->setIcon(QIcon(":/icons/resources/pack.png"));
    actionPack->setStatusTip("Pack current design");
    actionPack->setEnabled(false);
    connect(actionPack, &QAction::triggered, task, &TaskManager::pack);

    actionAssignBudget = new QAction("Assign Budget", this);
    actionAssignBudget->setIcon(QIcon(":/icons/resources/time_add.png"));
    actionAssignBudget->setStatusTip("Assign time budget for current design");
    actionAssignBudget->setEnabled(false);
    connect(actionAssignBudget, &QAction::triggered, this, &BaseMainWindow::budget);

    actionPlace = new QAction("Place", this);
    actionPlace->setIcon(QIcon(":/icons/resources/place.png"));
    actionPlace->setStatusTip("Place current design");
    actionPlace->setEnabled(false);
    connect(actionPlace, &QAction::triggered, this, &BaseMainWindow::place);

    actionRoute = new QAction("Route", this);
    actionRoute->setIcon(QIcon(":/icons/resources/route.png"));
    actionRoute->setStatusTip("Route current design");
    actionRoute->setEnabled(false);
    connect(actionRoute, &QAction::triggered, task, &TaskManager::route);

    actionExecutePy = new QAction("Execute Python", this);
    actionExecutePy->setIcon(QIcon(":/icons/resources/py.png"));
    actionExecutePy->setStatusTip("Execute Python script");
    actionExecutePy->setEnabled(true);
    connect(actionExecutePy, &QAction::triggered, this, &BaseMainWindow::execute_python);

    // Worker control toolbar actions
    actionPlay = new QAction("Play", this);
    actionPlay->setIcon(QIcon(":/icons/resources/control_play.png"));
    actionPlay->setStatusTip("Continue running task");
    actionPlay->setEnabled(false);
    connect(actionPlay, &QAction::triggered, task, &TaskManager::continue_thread);

    actionPause = new QAction("Pause", this);
    actionPause->setIcon(QIcon(":/icons/resources/control_pause.png"));
    actionPause->setStatusTip("Pause running task");
    actionPause->setEnabled(false);
    connect(actionPause, &QAction::triggered, task, &TaskManager::pause_thread);

    actionStop = new QAction("Stop", this);
    actionStop->setIcon(QIcon(":/icons/resources/control_stop.png"));
    actionStop->setStatusTip("Stop running task");
    actionStop->setEnabled(false);
    connect(actionStop, &QAction::triggered, task, &TaskManager::terminate_thread);

    // Device view control toolbar actions
    QAction *actionZoomIn = new QAction("Zoom In", this);
    actionZoomIn->setIcon(QIcon(":/icons/resources/zoom_in.png"));
    connect(actionZoomIn, &QAction::triggered, fpgaView, &FPGAViewWidget::zoomIn);

    QAction *actionZoomOut = new QAction("Zoom Out", this);
    actionZoomOut->setIcon(QIcon(":/icons/resources/zoom_out.png"));
    connect(actionZoomOut, &QAction::triggered, fpgaView, &FPGAViewWidget::zoomOut);

    QAction *actionZoomSelected = new QAction("Zoom Selected", this);
    actionZoomSelected->setIcon(QIcon(":/icons/resources/shape_handles.png"));
    connect(actionZoomSelected, &QAction::triggered, fpgaView, &FPGAViewWidget::zoomSelected);

    QAction *actionZoomOutbound = new QAction("Zoom Outbound", this);
    actionZoomOutbound->setIcon(QIcon(":/icons/resources/shape_square.png"));
    connect(actionZoomOutbound, &QAction::triggered, fpgaView, &FPGAViewWidget::zoomOutbound);

    actionDisplayBel = new QAction("Enable/Disable Bels", this);
    actionDisplayBel->setIcon(QIcon(":/icons/resources/bel.png"));
    actionDisplayBel->setCheckable(true);
    actionDisplayBel->setChecked(true);
    connect(actionDisplayBel, &QAction::triggered, this, &BaseMainWindow::enableDisableDecals);

    actionDisplayWire = new QAction("Enable/Disable Wires", this);
    actionDisplayWire->setIcon(QIcon(":/icons/resources/wire.png"));
    actionDisplayWire->setCheckable(true);
    actionDisplayWire->setChecked(true);
    connect(actionDisplayWire, &QAction::triggered, this, &BaseMainWindow::enableDisableDecals);

    actionDisplayPip = new QAction("Enable/Disable Pips", this);
    actionDisplayPip->setIcon(QIcon(":/icons/resources/pip.png"));
    actionDisplayPip->setCheckable(true);
#ifdef ARCH_ECP5
    actionDisplayPip->setChecked(false);
#else
    actionDisplayPip->setChecked(true);
#endif
    connect(actionDisplayPip, &QAction::triggered, this, &BaseMainWindow::enableDisableDecals);

    actionDisplayGroups = new QAction("Enable/Disable Groups", this);
    actionDisplayGroups->setIcon(QIcon(":/icons/resources/group.png"));
    actionDisplayGroups->setCheckable(true);
    actionDisplayGroups->setChecked(true);
    connect(actionDisplayGroups, &QAction::triggered, this, &BaseMainWindow::enableDisableDecals);

    // set initial state
    fpgaView->enableDisableDecals(actionDisplayBel->isChecked(), actionDisplayWire->isChecked(),
                                  actionDisplayPip->isChecked(), actionDisplayGroups->isChecked());

    // Add main menu
    menuBar = new QMenuBar();
    menuBar->setGeometry(QRect(0, 0, 1024, 27));
    setMenuBar(menuBar);
    QMenu *menuFile = new QMenu("&File", menuBar);
    QMenu *menuHelp = new QMenu("&Help", menuBar);
    menuDesign = new QMenu("&Design", menuBar);
    menuBar->addAction(menuFile->menuAction());
    menuBar->addAction(menuDesign->menuAction());
    menuBar->addAction(menuHelp->menuAction());

    // Add File menu actions
    menuFile->addAction(actionNew);
    menuFile->addAction(actionLoadJSON);
    menuFile->addAction(actionSaveJSON);
    menuFile->addSeparator();
    menuFile->addAction(actionExit);

    // Add Design menu actions
    menuDesign->addAction(actionPack);
    menuDesign->addAction(actionAssignBudget);
    menuDesign->addAction(actionPlace);
    menuDesign->addAction(actionRoute);
    menuDesign->addSeparator();
    menuDesign->addAction(actionExecutePy);

    // Add Help menu actions
    menuHelp->addAction(actionAbout);

    // Main action bar
    mainActionBar = new QToolBar("Main");
    addToolBar(Qt::TopToolBarArea, mainActionBar);
    mainActionBar->addAction(actionNew);
    mainActionBar->addAction(actionLoadJSON);
    mainActionBar->addAction(actionSaveJSON);
    mainActionBar->addSeparator();
    mainActionBar->addAction(actionPack);
    mainActionBar->addAction(actionAssignBudget);
    mainActionBar->addAction(actionPlace);
    mainActionBar->addAction(actionRoute);
    mainActionBar->addAction(actionExecutePy);

    // Add worker control toolbar
    QToolBar *workerControlToolBar = new QToolBar("Worker");
    addToolBar(Qt::TopToolBarArea, workerControlToolBar);
    workerControlToolBar->addAction(actionPlay);
    workerControlToolBar->addAction(actionPause);
    workerControlToolBar->addAction(actionStop);

    // Add device view control toolbar
    QToolBar *deviceViewToolBar = new QToolBar("Device");
    addToolBar(Qt::TopToolBarArea, deviceViewToolBar);
    deviceViewToolBar->addAction(actionZoomIn);
    deviceViewToolBar->addAction(actionZoomOut);
    deviceViewToolBar->addAction(actionZoomSelected);
    deviceViewToolBar->addAction(actionZoomOutbound);
    deviceViewToolBar->addSeparator();
    deviceViewToolBar->addAction(actionDisplayBel);
    deviceViewToolBar->addAction(actionDisplayWire);
    deviceViewToolBar->addAction(actionDisplayPip);
    deviceViewToolBar->addAction(actionDisplayGroups);

    // Add status bar with progress bar
    statusBar = new QStatusBar();
    progressBar = new QProgressBar(statusBar);
    progressBar->setAlignment(Qt::AlignRight);
    progressBar->setMaximumSize(180, 19);
    statusBar->addPermanentWidget(progressBar);
    progressBar->setValue(0);
    progressBar->setEnabled(false);
    setStatusBar(statusBar);
}

void BaseMainWindow::enableDisableDecals()
{
    fpgaView->enableDisableDecals(actionDisplayBel->isChecked(), actionDisplayWire->isChecked(),
                                  actionDisplayPip->isChecked(), actionDisplayGroups->isChecked());
    ctx->refreshUi();
}

void BaseMainWindow::open_json()
{
    QString fileName = QFileDialog::getOpenFileName(this, QString("Open JSON"), QString(), QString("*.json"));
    if (!fileName.isEmpty()) {
        disableActions();
        ctx = handler->load_json(fileName.toStdString());
        Q_EMIT contextChanged(ctx.get());
        Q_EMIT updateTreeView();
        log("Loading design successful.\n");
        updateActions();
    }
}

void BaseMainWindow::save_json()
{
    QString fileName = QFileDialog::getSaveFileName(this, QString("Save JSON"), QString(), QString("*.json"));
    if (!fileName.isEmpty()) {
        std::string fn = fileName.toStdString();
        std::ofstream f(fn);
        if (write_json_file(f, fn, ctx.get()))
            log("Saving JSON successful.\n");
        else
            log("Saving JSON failed.\n");
    }
}

void BaseMainWindow::pack_finished(bool status)
{
    disableActions();
    if (status) {
        log("Packing design successful.\n");
        Q_EMIT updateTreeView();
        updateActions();
    } else {
        log("Packing design failed.\n");
    }
}

void BaseMainWindow::budget_finish(bool status)
{
    disableActions();
    if (status) {
        log("Assigning timing budget successful.\n");
        updateActions();
    } else {
        log("Assigning timing budget failed.\n");
    }
}

void BaseMainWindow::place_finished(bool status)
{
    disableActions();
    if (status) {
        log("Placing design successful.\n");
        Q_EMIT updateTreeView();
        updateActions();
    } else {
        log("Placing design failed.\n");
    }
}
void BaseMainWindow::route_finished(bool status)
{
    disableActions();
    if (status) {
        log("Routing design successful.\n");
        Q_EMIT updateTreeView();
        updateActions();
    } else
        log("Routing design failed.\n");
}

void BaseMainWindow::taskCanceled()
{
    log("CANCELED\n");
    disableActions();
}

void BaseMainWindow::taskStarted()
{
    disableActions();
    actionPause->setEnabled(true);
    actionStop->setEnabled(true);
}

void BaseMainWindow::taskPaused()
{
    disableActions();
    actionPlay->setEnabled(true);
    actionStop->setEnabled(true);
}

void BaseMainWindow::budget()
{
    bool ok;
    double freq = QInputDialog::getDouble(this, "Assign timing budget", "Frequency [MHz]:", 50, 0, 250, 2, &ok);
    if (ok) {
        freq *= 1e6;
        timing_driven = true;
        Q_EMIT task->budget(freq);
    }
}

void BaseMainWindow::place() { Q_EMIT task->place(timing_driven); }

void BaseMainWindow::disableActions()
{
    actionLoadJSON->setEnabled(true);
    actionPack->setEnabled(false);
    actionAssignBudget->setEnabled(false);
    actionPlace->setEnabled(false);
    actionRoute->setEnabled(false);

    actionExecutePy->setEnabled(true);

    actionPlay->setEnabled(false);
    actionPause->setEnabled(false);
    actionStop->setEnabled(false);

    onDisableActions();
}

void BaseMainWindow::updateActions()
{
    if (ctx->settings.find(ctx->id("pack")) == ctx->settings.end())
        actionPack->setEnabled(true);
    else if (ctx->settings.find(ctx->id("place")) == ctx->settings.end()) {
        actionAssignBudget->setEnabled(true);
        actionPlace->setEnabled(true);
    } else if (ctx->settings.find(ctx->id("route")) == ctx->settings.end())
        actionRoute->setEnabled(true);

    onUpdateActions();
}

void BaseMainWindow::execute_python()
{
    QString fileName = QFileDialog::getOpenFileName(this, QString("Execute Python"), QString(), QString("*.py"));
    if (!fileName.isEmpty()) {
        console->execute_python(fileName.toStdString());
    }
}

void BaseMainWindow::notifyChangeContext() { Q_EMIT contextChanged(ctx.get()); }

NEXTPNR_NAMESPACE_END