import sys
from typing import Dict, List, Optional, Sequence, Tuple, TypeAlias

from PySide6.QtWidgets import QApplication, QDialog, QHBoxLayout, QLabel, QMainWindow, QPushButton, QVBoxLayout, QWidget
from PySide6.QtCore import Slot
from PySide6.QtPdf import QPdfDocument
from PySide6.QtPdfWidgets import QPdfView
import fitz

TEST_FILENAME = "/home/luna/Documents/Resources/Praca Licencjacka/sources/2018_Torres-Benitez_Metabolomic analysis Parmotrema.pdf"

Coords: TypeAlias = Tuple[float, float]

class Selection:
    def __init__(self, bounds: Tuple[Coords, Coords], columns: Optional[Sequence[float]] = None):
        self.bounds = bounds
        self.columns = columns

class Document:
    def __init__(self, filename: str):
        self.filename = filename
        self.document = fitz.Document(filename)
        self.selections: Dict[int, List[Selection]] = {}

class SelectablePdfView(QPdfView):
    pass

class State():
    pass

class Frontend():
    def __init__(self, argv: Sequence[str]):
        self.app = QApplication(argv)
        self.window = QMainWindow()
        self.state = State()

        self.thumbnails = QWidget()
        self.pdfDocument = QPdfDocument()
        self.optionsPanel = QWidget()

        central_widget = QWidget()
        cw_layout = QHBoxLayout(central_widget)
        cw_layout.addWidget(self.thumbnails)
        cw_layout.addWidget(self.optionsPanel)
        self.window.setCentralWidget(central_widget)


    def exec(self):
        self.window.show()
        self.app.exec()

if __name__ == "__main__":
    app = Frontend(sys.argv)
    app.exec()