import pandas as pd
from PyQt6 import QtCore
from PyQt6.QtCore import Qt


class PandasModel(QtCore.QAbstractTableModel):
    def __init__(self, df: pd.DataFrame, parent=None):
        QtCore.QAbstractTableModel.__init__(self, parent)

        self._data = df
        self._horizontalHeaders = list(df.columns)

    # Overloaded functions

    def rowCount(self, parent=None):
        return len(self._data.values)

    def columnCount(self, parent=None):
        return self._data.columns.size

    def data(self, index, role=Qt.ItemDataRole.DisplayRole):
        if not index.isValid():
            return QtCore.QVariant()
        if role != Qt.ItemDataRole.DisplayRole:
            return QtCore.QVariant()

        item = self._data.iloc[index.row(), index.column()]
        return QtCore.QVariant(str(item))

    def headerData(self, section, orientation,
                   role=Qt.ItemDataRole.DisplayRole):

        if not ((orientation == Qt.Orientation.Horizontal)
                and (role == Qt.ItemDataRole.DisplayRole)):
            return super().headerData(section, orientation, role)

        return self._horizontalHeaders[section]

    # Other functions

    def get_dataframe(self):
        return self._data