# -*- coding: utf-8 -*-

# Copyright (c) 2004 - 2023 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing a dialog to preview the contents of an icon directory.
"""

import os.path

from PyQt6.QtCore import QDir, pyqtSlot
from PyQt6.QtGui import QIcon, QPalette
from PyQt6.QtWidgets import QDialog, QListWidgetItem

from .Ui_IconsPreviewDialog import Ui_IconsPreviewDialog


class IconsPreviewDialog(QDialog, Ui_IconsPreviewDialog):
    """
    Class implementing a dialog to preview the contents of an icon directory.
    """

    def __init__(self, directories, parent=None):
        """
        Constructor

        @param directories list of directories to be shown
        @type list of str
        @param parent parent widget
        @type QWidget
        """
        super().__init__(parent)
        self.setupUi(self)

        palette = self.iconView.palette()
        self.__backgroundColor = palette.color(QPalette.ColorRole.Window)
        self.__foregroundColor = palette.color(QPalette.ColorRole.WindowText)
        self.__inverted = False

        self.directoryCombo.addItems(sorted(directories))

    @pyqtSlot(str)
    def on_directoryCombo_currentTextChanged(self, dirName):
        """
        Private slot to show the icons of the selected icon directory.

        @param dirName selected icon directory
        @type str
        """
        self.iconView.clear()
        directory = QDir(dirName)
        for icon in directory.entryList(["*.svg", "*.svgz", "*.png"]):
            itm = QListWidgetItem(
                QIcon(os.path.join(dirName, icon)), icon, self.iconView
            )
            if self.__inverted:
                itm.setForeground(self.__backgroundColor)
            else:
                itm.setForeground(self.__foregroundColor)

    @pyqtSlot(bool)
    def on_invertButton_toggled(self, checked):
        """
        Private slot to show the icons on an inverted background.

        @param checked state of the button
        @type bool
        """
        self.__inverted = checked

        styleSheet = (
            f"color: {self.__backgroundColor.name()};"
            f"background-color: {self.__foregroundColor.name()}"
            if self.__inverted
            else f"color: {self.__foregroundColor.name()};"
            f"background-color: {self.__backgroundColor.name()}"
        )
        self.iconView.viewport().setStyleSheet(styleSheet)

        self.on_refreshButton_clicked()

    @pyqtSlot()
    def on_refreshButton_clicked(self):
        """
        Private slot to refresh the view.
        """
        currentDirectory = self.directoryCombo.currentText()
        self.on_directoryCombo_currentTextChanged(currentDirectory)
