#!/usr/bin/python3
import sys

from PyQt5 import QtCore as QC, QtWidgets as QW

from exceptions import ROMOpeningError
from widgets import TilePicker, ROMDockable


class MainWindow(QW.QMainWindow):
    def __init__(self):
        super().__init__()

        self.resize(QC.QSize(1200, 800))
        self.rom_dockables = []

        bar = self.menuBar()
        file = bar.addMenu("&File")
        open_action = file.addAction("&Open")
        quit_action = file.addAction("&Quit")
        open_action.triggered.connect(self.open_rom)
        quit_action.triggered.connect(app.quit)

        self.tile_picker = TilePicker()

        tile_picker_scroll = QW.QScrollArea(self)
        tile_picker_scroll.setWidget(self.tile_picker)

        self.setCentralWidget(tile_picker_scroll)

    def open_rom(self):
        filename, filetype = QW.QFileDialog.getOpenFileName(
            self,
            "Open ROM", "", "NES Files (*.nes)"
        )
        try:
            new_rom_dockable = ROMDockable(filename, filetype, self.tile_picker)
        except ROMOpeningError:
            pass

        try:
            last_docked = self.rom_dockables[-1]
            self.tabifyDockWidget(last_docked, new_rom_dockable)
        except IndexError:
            self.addDockWidget(QC.Qt.LeftDockWidgetArea, new_rom_dockable)

        new_rom_dockable.show()
        new_rom_dockable.raise_()
        self.rom_dockables.append(new_rom_dockable)


app = QW.QApplication(sys.argv)
window = MainWindow()
window.show()
app.exec_()