#!/usr/bin/env python
# --!-- coding: utf8 --!--
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QWidget, QFrame, QPushButton, QVBoxLayout, QSizePolicy, qApp

from manuskript.ui import style


class collapsibleGroupBox2(QWidget):
    def __init__(self, parent=None, title=None):
        QWidget.__init__(self, parent)
        self.title = "Toggle" if title is None else title
        self.frame = QFrame(self)
        self.button = QPushButton(self.title, self)
        self.button.setCheckable(True)
        self.button.setChecked(True)
        self.switched = False
        self.vPolicy = None

        self.button.setStyleSheet(style.collapsibleGroupBoxButton())

        if title:
            self.setTitle(title)

    def resizeEvent(self, event):
        if not self.switched:
            self.switchLayout()
        return QWidget.resizeEvent(self, event)

    def switchLayout(self):
        self.frame.setLayout(self.layout())
        self.wLayout = QVBoxLayout(self)
        self.wLayout.setContentsMargins(0, 0, 0, 0)
        self.wLayout.setSpacing(0)
        self.wLayout.addWidget(self.button)
        self.wLayout.addWidget(self.frame)
        self.button.toggled.connect(self.setExpanded)
        self.frame.layout().setContentsMargins(0, 0, 0, 4)
        self.frame.layout().setSpacing(0)
        self.switched = True

        self.vPolicy = self.sizePolicy().verticalPolicy()
        self.parent().layout().setAlignment(Qt.AlignTop)

        self.setExpanded(self.button.isChecked())

    def setFlat(self, val):
        if val:
            self.frame.setFrameShape(QFrame.NoFrame)

    def setCheckable(self, val):
        pass

    def setTitle(self, title):
        self.title = title

        if self.button.isChecked():
            self.button.setText("▼ {}".format(self.title))
        else:
            self.button.setText("► {}".format(self.title))

    def setExpanded(self, val):
        self.frame.setVisible(val)
        if val:
            self.setSizePolicy(QSizePolicy.Preferred, self.vPolicy)
        else:
            self.setSizePolicy(QSizePolicy.Preferred, QSizePolicy.Maximum)

        self.setTitle(self.title)

    def saveState(self):
        return self.button.isChecked()

    def restoreState(self, val):
        self.button.setChecked(val)