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

# Copyright (c) 2002 - 2023 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing a configuration dialog for the tools menu.
"""

import copy

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

from eric7 import Utilities
from eric7.EricWidgets import EricMessageBox
from eric7.EricWidgets.EricPathPicker import EricPathPickerModes
from eric7.SystemUtilities import FileSystemUtilities

from .Ui_ToolConfigurationDialog import Ui_ToolConfigurationDialog


class ToolConfigurationDialog(QDialog, Ui_ToolConfigurationDialog):
    """
    Class implementing a configuration dialog for the tools menu.
    """

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

        @param toollist list of configured tools
        @param parent parent widget (QWidget)
        """
        super().__init__(parent)
        self.setupUi(self)

        self.iconPicker.setMode(EricPathPickerModes.OPEN_FILE_MODE)
        self.iconPicker.setFilters(self.tr("Icon files (*.png)"))
        self.executablePicker.setMode(EricPathPickerModes.OPEN_FILE_MODE)

        self.redirectionModes = [
            ("no", self.tr("no redirection")),
            ("show", self.tr("show output")),
            ("insert", self.tr("insert into current editor")),
            ("replaceSelection", self.tr("replace selection of current editor")),
        ]

        self.toollist = copy.deepcopy(toollist)
        for tool in toollist:
            self.toolsList.addItem(tool["menutext"])

        for mode in self.redirectionModes:
            self.redirectCombo.addItem(mode[1])

        if len(toollist):
            self.toolsList.setCurrentRow(0)
            self.on_toolsList_currentRowChanged(0)

        t = self.argumentsEdit.whatsThis()
        if t:
            t += Utilities.getPercentReplacementHelp()
            self.argumentsEdit.setWhatsThis(t)

    def __findModeIndex(self, shortName):
        """
        Private method to find the mode index by its short name.

        @param shortName short name of the mode (string)
        @return index of the mode (integer)
        """
        for ind, mode in enumerate(self.redirectionModes):
            if mode[0] == shortName:
                return ind
        return 1  # default is "show output"

    @pyqtSlot()
    def on_newButton_clicked(self):
        """
        Private slot to clear all entry fields.
        """
        self.executablePicker.clear()
        self.menuEdit.clear()
        self.iconPicker.clear()
        self.argumentsEdit.clear()
        self.redirectCombo.setCurrentIndex(1)

    @pyqtSlot()
    def on_addButton_clicked(self):
        """
        Private slot to add a new entry.
        """
        menutext = self.menuEdit.text()
        icon = self.iconPicker.text()
        executable = self.executablePicker.text()
        arguments = self.argumentsEdit.text()
        redirect = self.redirectionModes[self.redirectCombo.currentIndex()][0]

        if not executable:
            EricMessageBox.critical(
                self,
                self.tr("Add tool entry"),
                self.tr(
                    "You have to set an executable to add to the Tools-Menu first."
                ),
            )
            return

        if not menutext:
            EricMessageBox.critical(
                self,
                self.tr("Add tool entry"),
                self.tr(
                    "You have to insert a menuentry text to add the"
                    " selected program to the Tools-Menu first."
                ),
            )
            return

        if not FileSystemUtilities.isinpath(executable):
            EricMessageBox.critical(
                self,
                self.tr("Add tool entry"),
                self.tr(
                    "The selected file could not be found or"
                    " is not an executable."
                    " Please choose an executable filename."
                ),
            )
            return

        if len(self.toolsList.findItems(menutext, Qt.MatchFlag.MatchExactly)):
            EricMessageBox.critical(
                self,
                self.tr("Add tool entry"),
                self.tr("An entry for the menu text {0} already exists.").format(
                    menutext
                ),
            )
            return

        self.toolsList.addItem(menutext)
        tool = {
            "menutext": menutext,
            "icon": icon,
            "executable": executable,
            "arguments": arguments,
            "redirect": redirect,
        }
        self.toollist.append(tool)

    @pyqtSlot()
    def on_changeButton_clicked(self):
        """
        Private slot to change an entry.
        """
        row = self.toolsList.currentRow()
        if row < 0:
            return

        menutext = self.menuEdit.text()
        icon = self.iconPicker.text()
        executable = self.executablePicker.text()
        arguments = self.argumentsEdit.text()
        redirect = self.redirectionModes[self.redirectCombo.currentIndex()][0]

        if not executable:
            EricMessageBox.critical(
                self,
                self.tr("Change tool entry"),
                self.tr(
                    "You have to set an executable to change the Tools-Menu entry."
                ),
            )
            return

        if not menutext:
            EricMessageBox.critical(
                self,
                self.tr("Change tool entry"),
                self.tr(
                    "You have to insert a menuentry text to change the"
                    " selected Tools-Menu entry."
                ),
            )
            return

        if not FileSystemUtilities.isinpath(executable):
            EricMessageBox.critical(
                self,
                self.tr("Change tool entry"),
                self.tr(
                    "The selected file could not be found or"
                    " is not an executable."
                    " Please choose an existing executable filename."
                ),
            )
            return

        self.toollist[row] = {
            "menutext": menutext,
            "icon": icon,
            "executable": executable,
            "arguments": arguments,
            "redirect": redirect,
        }
        self.toolsList.currentItem().setText(menutext)
        self.changeButton.setEnabled(False)

    @pyqtSlot()
    def on_deleteButton_clicked(self):
        """
        Private slot to delete the selected entry.
        """
        row = self.toolsList.currentRow()
        if row < 0:
            return

        del self.toollist[row]
        itm = self.toolsList.takeItem(row)
        del itm
        if row >= len(self.toollist):
            row -= 1
        self.toolsList.setCurrentRow(row)
        self.on_toolsList_currentRowChanged(row)

    @pyqtSlot()
    def on_downButton_clicked(self):
        """
        Private slot to move an entry down in the list.
        """
        curr = self.toolsList.currentRow()
        self.__swap(curr, curr + 1)
        self.toolsList.clear()
        for tool in self.toollist:
            self.toolsList.addItem(tool["menutext"])
        self.toolsList.setCurrentRow(curr + 1)
        if curr + 1 == len(self.toollist):
            self.downButton.setEnabled(False)
        self.upButton.setEnabled(True)

    @pyqtSlot()
    def on_upButton_clicked(self):
        """
        Private slot to move an entry up in the list.
        """
        curr = self.toolsList.currentRow()
        self.__swap(curr - 1, curr)
        self.toolsList.clear()
        for tool in self.toollist:
            self.toolsList.addItem(tool["menutext"])
        self.toolsList.setCurrentRow(curr - 1)
        if curr - 1 == 0:
            self.upButton.setEnabled(False)
        self.downButton.setEnabled(True)

    @pyqtSlot()
    def on_separatorButton_clicked(self):
        """
        Private slot to add a menu separator.
        """
        self.toolsList.addItem("--")
        tool = {
            "menutext": "--",
            "icon": "",
            "executable": "",
            "arguments": "",
            "redirect": "no",
        }
        self.toollist.append(tool)

    @pyqtSlot(str)
    def on_executablePicker_pathSelected(self, path):
        """
        Private slot to check the executable after it has been selected.

        @param path path of the executable
        @type str
        """
        if path and not FileSystemUtilities.isinpath(path):
            EricMessageBox.critical(
                self,
                self.tr("Select executable"),
                self.tr(
                    "The selected file is not an executable."
                    " Please choose an executable filename."
                ),
            )

    def on_toolsList_currentRowChanged(self, row):
        """
        Private slot to set the lineedits depending on the selected entry.

        @param row the row of the selected entry (integer)
        """
        if row >= 0 and row < len(self.toollist):
            if self.toollist[row]["menutext"] == "--":
                self.executablePicker.clear()
                self.menuEdit.clear()
                self.iconPicker.clear()
                self.argumentsEdit.clear()
                self.redirectCombo.setCurrentIndex(0)
            else:
                tool = self.toollist[row]
                self.menuEdit.setText(tool["menutext"])
                self.iconPicker.setText(tool["icon"])
                self.executablePicker.setText(tool["executable"])
                self.argumentsEdit.setText(tool["arguments"])
                self.redirectCombo.setCurrentIndex(
                    self.__findModeIndex(tool["redirect"])
                )

            self.changeButton.setEnabled(False)
            self.deleteButton.setEnabled(True)

            if row != 0:
                self.upButton.setEnabled(True)
            else:
                self.upButton.setEnabled(False)

            if row + 1 != len(self.toollist):
                self.downButton.setEnabled(True)
            else:
                self.downButton.setEnabled(False)
        else:
            self.executablePicker.clear()
            self.menuEdit.clear()
            self.iconPicker.clear()
            self.argumentsEdit.clear()
            self.downButton.setEnabled(False)
            self.upButton.setEnabled(False)
            self.deleteButton.setEnabled(False)
            self.changeButton.setEnabled(False)

    def __toolEntryChanged(self):
        """
        Private slot to perform actions when a tool entry was changed.
        """
        row = self.toolsList.currentRow()
        if (
            row >= 0
            and row < len(self.toollist)
            and self.toollist[row]["menutext"] != "--"
        ):
            self.changeButton.setEnabled(True)

    def on_menuEdit_textChanged(self, text):
        """
        Private slot called, when the menu text was changed.

        @param text the new text (string) (ignored)
        """
        self.__toolEntryChanged()

    def on_iconPicker_textChanged(self, text):
        """
        Private slot called, when the icon path was changed.

        @param text the new text (string) (ignored)
        """
        self.__toolEntryChanged()

    def on_executablePicker_textChanged(self, text):
        """
        Private slot called, when the executable was changed.

        @param text the new text (string) (ignored)
        """
        self.__toolEntryChanged()

    def on_argumentsEdit_textChanged(self, text):
        """
        Private slot called, when the arguments string was changed.

        @param text the new text (string) (ignored)
        """
        self.__toolEntryChanged()

    @pyqtSlot(int)
    def on_redirectCombo_currentIndexChanged(self, index):
        """
        Private slot called, when the redirection mode was changed.

        @param index the selected mode index (integer) (ignored)
        """
        self.__toolEntryChanged()

    def getToollist(self):
        """
        Public method to retrieve the tools list.

        @return a list of tuples containing the menu text, the executable,
            the executables arguments and a redirection flag
        """
        return self.toollist[:]

    def __swap(self, itm1, itm2):
        """
        Private method used two swap two list entries given by their index.

        @param itm1 index of first entry (int)
        @param itm2 index of second entry (int)
        """
        tmp = self.toollist[itm1]
        self.toollist[itm1] = self.toollist[itm2]
        self.toollist[itm2] = tmp
