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

# Copyright (c) 2012 - 2023 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing a dialog to browse the change lists.
"""

import os

import pysvn

from PyQt6.QtCore import Qt, pyqtSlot
from PyQt6.QtWidgets import QDialog, QDialogButtonBox, QListWidgetItem

from eric7.EricGui.EricOverrideCursor import EricOverrideCursor
from eric7.EricUtilities.EricMutexLocker import EricMutexLocker

from .SvnDialogMixin import SvnDialogMixin
from .Ui_SvnChangeListsDialog import Ui_SvnChangeListsDialog


class SvnChangeListsDialog(QDialog, SvnDialogMixin, Ui_SvnChangeListsDialog):
    """
    Class implementing a dialog to browse the change lists.
    """

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

        @param vcs reference to the vcs object
        @param parent parent widget (QWidget)
        """
        super().__init__(parent)
        self.setupUi(self)
        SvnDialogMixin.__init__(self)
        self.setWindowFlags(Qt.WindowType.Window)

        self.buttonBox.button(QDialogButtonBox.StandardButton.Close).setEnabled(False)
        self.buttonBox.button(QDialogButtonBox.StandardButton.Cancel).setDefault(True)

        self.vcs = vcs

        self.client = self.vcs.getClient()
        self.client.callback_cancel = self._clientCancelCallback
        self.client.callback_get_login = self._clientLoginCallback
        self.client.callback_ssl_server_trust_prompt = (
            self._clientSslServerTrustPromptCallback
        )

    @pyqtSlot(QListWidgetItem, QListWidgetItem)
    def on_changeLists_currentItemChanged(self, current, previous):
        """
        Private slot to handle the selection of a new item.

        @param current current item (QListWidgetItem)
        @param previous previous current item (QListWidgetItem)
        """
        self.filesList.clear()
        if current is not None:
            changelist = current.text()
            if changelist in self.changeListsDict:
                self.filesList.addItems(sorted(self.changeListsDict[changelist]))

    def start(self, path):
        """
        Public slot to populate the data.

        @param path directory name to show change lists for (string)
        """
        self.changeListsDict = {}
        self.cancelled = False

        self.filesLabel.setText(self.tr("Files (relative to {0}):").format(path))

        with EricOverrideCursor():
            try:
                with EricMutexLocker(self.vcs.vcsExecutionMutex):
                    entries = self.client.get_changelist(
                        path, depth=pysvn.depth.infinity
                    )
                for entry in entries:
                    file = entry[0]
                    changelist = entry[1]
                    if changelist not in self.changeListsDict:
                        self.changeListsDict[changelist] = []
                    filename = file.replace(path + os.sep, "")
                    if filename not in self.changeListsDict[changelist]:
                        self.changeListsDict[changelist].append(filename)
            except pysvn.ClientError as e:
                self.__showError(e.args[0])
        self.__finish()

    def __finish(self):
        """
        Private slot called when the user pressed the button.
        """
        self.changeLists.addItems(sorted(self.changeListsDict.keys()))

        self.buttonBox.button(QDialogButtonBox.StandardButton.Close).setEnabled(True)
        self.buttonBox.button(QDialogButtonBox.StandardButton.Cancel).setEnabled(False)
        self.buttonBox.button(QDialogButtonBox.StandardButton.Close).setDefault(True)

        if len(self.changeListsDict) == 0:
            self.changeLists.addItem(self.tr("No changelists found"))
            self.buttonBox.button(QDialogButtonBox.StandardButton.Close).setFocus(
                Qt.FocusReason.OtherFocusReason
            )
        else:
            self.changeLists.setCurrentRow(0)
            self.changeLists.setFocus(Qt.FocusReason.OtherFocusReason)

    def on_buttonBox_clicked(self, button):
        """
        Private slot called by a button of the button box clicked.

        @param button button that was clicked (QAbstractButton)
        """
        if button == self.buttonBox.button(QDialogButtonBox.StandardButton.Close):
            self.close()
        elif button == self.buttonBox.button(QDialogButtonBox.StandardButton.Cancel):
            self.cancelled = True
            self.__finish()
