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

# Copyright (c) 2009 - 2024 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing a dialog to manage bookmarks.
"""

from PyQt6.QtCore import QModelIndex, Qt, QUrl, pyqtSignal, pyqtSlot
from PyQt6.QtGui import QCursor, QFontMetrics
from PyQt6.QtWidgets import QApplication, QDialog, QInputDialog, QLineEdit, QMenu

from eric7.EricCore.EricTreeSortFilterProxyModel import EricTreeSortFilterProxyModel
from eric7.WebBrowser.WebBrowserWindow import WebBrowserWindow

from .Ui_BookmarksDialog import Ui_BookmarksDialog


class BookmarksDialog(QDialog, Ui_BookmarksDialog):
    """
    Class implementing a dialog to manage bookmarks.

    @signal openUrl(QUrl, str) emitted to open a URL in the current tab
    @signal newTab(QUrl, str) emitted to open a URL in a new tab
    @signal newBackgroundTab(QUrl, str) emitted to open a URL in a new
        background tab
    @signal newWindow(QUrl, str) emitted to open a URL in a new window
    """

    openUrl = pyqtSignal(QUrl, str)
    newTab = pyqtSignal(QUrl, str)
    newBackgroundTab = pyqtSignal(QUrl, str)
    newWindow = pyqtSignal(QUrl, str)

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

        @param parent reference to the parent widget
        @type QWidge
        @param manager reference to the bookmarks manager object
        @type BookmarksManager
        """
        super().__init__(parent)
        self.setupUi(self)
        self.setWindowFlags(Qt.WindowType.Window)

        self.__bookmarksManager = manager
        if self.__bookmarksManager is None:
            self.__bookmarksManager = WebBrowserWindow.bookmarksManager()

        self.__bookmarksModel = self.__bookmarksManager.bookmarksModel()
        self.__proxyModel = EricTreeSortFilterProxyModel(self)
        self.__proxyModel.setFilterKeyColumn(-1)
        self.__proxyModel.setSourceModel(self.__bookmarksModel)

        self.searchEdit.textChanged.connect(self.__proxyModel.setFilterFixedString)

        self.bookmarksTree.setModel(self.__proxyModel)
        self.bookmarksTree.setExpanded(self.__proxyModel.index(0, 0), True)
        fm = QFontMetrics(self.font())
        header = fm.horizontalAdvance("m") * 40
        self.bookmarksTree.header().resizeSection(0, header)
        self.bookmarksTree.header().setStretchLastSection(True)
        self.bookmarksTree.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu)

        self.bookmarksTree.activated.connect(self.__activated)
        self.bookmarksTree.customContextMenuRequested.connect(
            self.__customContextMenuRequested
        )

        self.removeButton.clicked.connect(self.bookmarksTree.removeSelected)
        self.addFolderButton.clicked.connect(self.__newFolder)

        self.__expandNodes(self.__bookmarksManager.bookmarks())

    def closeEvent(self, evt):
        """
        Protected method to handle the closing of the dialog.

        @param evt reference to the event object (ignored)
        @type QCloseEvent
        """
        self.__shutdown()

    def reject(self):
        """
        Public method called when the dialog is rejected.
        """
        self.__shutdown()
        super().reject()

    def __shutdown(self):
        """
        Private method to perform shutdown actions for the dialog.
        """
        if self.__saveExpandedNodes(self.bookmarksTree.rootIndex()):
            self.__bookmarksManager.changeExpanded()

    def __saveExpandedNodes(self, parent):
        """
        Private method to save the child nodes of an expanded node.

        @param parent index of the parent node
        @type QModelIndex
        @return flag indicating a change
        @rtype bool
        """
        changed = False
        for row in range(self.__proxyModel.rowCount(parent)):
            child = self.__proxyModel.index(row, 0, parent)
            sourceIndex = self.__proxyModel.mapToSource(child)
            childNode = self.__bookmarksModel.node(sourceIndex)
            wasExpanded = childNode.expanded
            if self.bookmarksTree.isExpanded(child):
                childNode.expanded = True
                changed |= self.__saveExpandedNodes(child)
            else:
                childNode.expanded = False
            changed |= wasExpanded != childNode.expanded

        return changed

    def __expandNodes(self, node):
        """
        Private method to expand all child nodes of a node.

        @param node reference to the bookmark node to expand
        @type BookmarkNode
        """
        for childNode in node.children():
            if childNode.expanded:
                idx = self.__bookmarksModel.nodeIndex(childNode)
                idx = self.__proxyModel.mapFromSource(idx)
                self.bookmarksTree.setExpanded(idx, True)
                self.__expandNodes(childNode)

    def __customContextMenuRequested(self, pos):
        """
        Private slot to handle the context menu request for the bookmarks tree.

        @param pos position the context menu was requested
        @type QPoint
        """
        from .BookmarkNode import BookmarkNodeType

        menu = QMenu()
        idx = self.bookmarksTree.indexAt(pos)
        idx = idx.sibling(idx.row(), 0)
        sourceIndex = self.__proxyModel.mapToSource(idx)
        node = self.__bookmarksModel.node(sourceIndex)
        if idx.isValid() and node.type() != BookmarkNodeType.Folder:
            menu.addAction(self.tr("&Open"), self.__openBookmarkInCurrentTab)
            menu.addAction(self.tr("Open in New &Tab"), self.__openBookmarkInNewTab)
            menu.addAction(
                self.tr("Open in New &Background Tab"),
                self.__openBookmarkInNewBackgroundTab,
            )
            menu.addAction(
                self.tr("Open in New &Window"), self.__openBookmarkInNewWindow
            )
            menu.addAction(
                self.tr("Open in New Pri&vate Window"),
                self.__openBookmarkInPrivateWindow,
            )
            menu.addSeparator()
        act = menu.addAction(self.tr("Edit &Name"), self.__editName)
        act.setEnabled(
            idx.flags() & Qt.ItemFlag.ItemIsEditable == Qt.ItemFlag.ItemIsEditable
        )
        if idx.isValid() and node.type() != BookmarkNodeType.Folder:
            menu.addAction(self.tr("Edit &Address"), self.__editAddress)
        menu.addSeparator()
        act = menu.addAction(self.tr("&Delete"), self.bookmarksTree.removeSelected)
        act.setEnabled(
            idx.flags() & Qt.ItemFlag.ItemIsDragEnabled == Qt.ItemFlag.ItemIsDragEnabled
        )
        menu.addSeparator()
        act = menu.addAction(self.tr("&Properties..."), self.__edit)
        act.setEnabled(
            idx.flags() & Qt.ItemFlag.ItemIsEditable == Qt.ItemFlag.ItemIsEditable
        )
        if idx.isValid() and node.type() == BookmarkNodeType.Folder:
            menu.addSeparator()
            menu.addAction(self.tr("New &Folder..."), self.__newFolder)
        menu.exec(QCursor.pos())

    @pyqtSlot(QModelIndex)
    def __activated(self, idx):
        """
        Private slot to handle the activation of an entry.

        @param idx reference to the entry index
        @type QModelIndex
        """
        if QApplication.keyboardModifiers() & Qt.KeyboardModifier.ControlModifier:
            self.__openBookmarkInNewTab()
        elif QApplication.keyboardModifiers() & Qt.KeyboardModifier.ShiftModifier:
            self.__openBookmarkInNewWindow()
        else:
            self.__openBookmarkInCurrentTab()

    def __openBookmarkInCurrentTab(self):
        """
        Private slot to open a bookmark in the current browser tab.
        """
        self.__openBookmark()

    def __openBookmarkInNewTab(self):
        """
        Private slot to open a bookmark in a new browser tab.
        """
        self.__openBookmark(newTab=True)

    def __openBookmarkInNewBackgroundTab(self):
        """
        Private slot to open a bookmark in a new browser tab.
        """
        self.__openBookmark(newTab=True, background=True)

    def __openBookmarkInNewWindow(self):
        """
        Private slot to open a bookmark in a new browser window.
        """
        self.__openBookmark(newWindow=True)

    def __openBookmarkInPrivateWindow(self):
        """
        Private slot to open a bookmark in a new private browser window.
        """
        self.__openBookmark(newWindow=True, privateWindow=True)

    def __openBookmark(
        self, newTab=False, newWindow=False, privateWindow=False, background=False
    ):
        """
        Private method to open a bookmark.

        @param newTab flag indicating to open the bookmark in a new tab
        @type bool
        @param newWindow flag indicating to open the bookmark in a new window
        @type bool
        @param privateWindow flag indicating to open the bookmark in a new
            private window
        @type bool
        @param background flag indicating to open the bookmark in a new
            background tab
        @type bool
        """
        from .BookmarkNode import BookmarkNodeType
        from .BookmarksModel import BookmarksModel

        idx = self.bookmarksTree.currentIndex()
        sourceIndex = self.__proxyModel.mapToSource(idx)
        node = self.__bookmarksModel.node(sourceIndex)
        if (
            not idx.parent().isValid()
            or node is None
            or node.type() == BookmarkNodeType.Folder
        ):
            return

        if newWindow:
            url = idx.sibling(idx.row(), 1).data(BookmarksModel.UrlRole)
            if privateWindow:
                WebBrowserWindow.mainWindow().newPrivateWindow(url)
            else:
                WebBrowserWindow.mainWindow().newWindow(url)
        else:
            if newTab:
                if background:
                    self.newBackgroundTab.emit(
                        idx.sibling(idx.row(), 1).data(BookmarksModel.UrlRole),
                        idx.sibling(idx.row(), 0).data(Qt.ItemDataRole.DisplayRole),
                    )
                else:
                    self.newTab.emit(
                        idx.sibling(idx.row(), 1).data(BookmarksModel.UrlRole),
                        idx.sibling(idx.row(), 0).data(Qt.ItemDataRole.DisplayRole),
                    )
            else:
                self.openUrl.emit(
                    idx.sibling(idx.row(), 1).data(BookmarksModel.UrlRole),
                    idx.sibling(idx.row(), 0).data(Qt.ItemDataRole.DisplayRole),
                )
        self.__bookmarksManager.incVisitCount(node)

    def __editName(self):
        """
        Private slot to edit the name part of a bookmark.
        """
        idx = self.bookmarksTree.currentIndex()
        idx = idx.sibling(idx.row(), 0)
        self.bookmarksTree.edit(idx)

    def __editAddress(self):
        """
        Private slot to edit the address part of a bookmark.
        """
        idx = self.bookmarksTree.currentIndex()
        idx = idx.sibling(idx.row(), 1)
        self.bookmarksTree.edit(idx)

    def __edit(self):
        """
        Private slot to edit a bookmarks properties.
        """
        from .BookmarkPropertiesDialog import BookmarkPropertiesDialog

        idx = self.bookmarksTree.currentIndex()
        sourceIndex = self.__proxyModel.mapToSource(idx)
        node = self.__bookmarksModel.node(sourceIndex)
        dlg = BookmarkPropertiesDialog(node)
        dlg.exec()

    def __newFolder(self):
        """
        Private slot to add a new bookmarks folder.
        """
        from .BookmarkNode import BookmarkNode, BookmarkNodeType

        currentIndex = self.bookmarksTree.currentIndex()
        idx = QModelIndex(currentIndex)
        sourceIndex = self.__proxyModel.mapToSource(idx)
        sourceNode = self.__bookmarksModel.node(sourceIndex)
        row = -1  # append new folder as the last item per default

        if sourceNode is not None and sourceNode.type() != BookmarkNodeType.Folder:
            # If the selected item is not a folder, add a new folder to the
            # parent folder, but directly below the selected item.
            idx = idx.parent()
            row = currentIndex.row() + 1

        if not idx.isValid():
            # Select bookmarks menu as default.
            idx = self.__proxyModel.index(1, 0)

        idx = self.__proxyModel.mapToSource(idx)
        parent = self.__bookmarksModel.node(idx)
        title, ok = QInputDialog.getText(
            self,
            self.tr("New Bookmark Folder"),
            self.tr("Enter title for new bookmark folder:"),
            QLineEdit.EchoMode.Normal,
        )

        if ok:
            if not title:
                title = self.tr("New Folder")
            node = BookmarkNode(BookmarkNodeType.Folder)
            node.title = title
            self.__bookmarksManager.addBookmark(parent, node, row)
