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

# Copyright (c) 2002 - 2019 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the Start Program dialog.
"""


from PyQt5.QtWidgets import QDialog, QDialogButtonBox, QComboBox, QInputDialog

from E5Gui.E5PathPicker import E5PathPickerModes
from E5Gui.E5Application import e5App

import Preferences


class StartDialog(QDialog):
    """
    Class implementing the Start Program dialog.
    
    It implements a dialog that is used to start an
    application for debugging. It asks the user to enter
    the commandline parameters, the working directory and
    whether exception reporting should be disabled.
    """
    def __init__(self, caption, lastUsedVenvName, argvList, wdList, envList,
                 exceptions,
                 parent=None, dialogType=0, modfuncList=None,
                 tracePython=False, autoClearShell=True, autoContinue=True,
                 autoFork=False, forkChild=False):
        """
        Constructor
        
        @param caption the caption to be displayed
        @type str
        @param lastUsedVenvName name of the most recently used virtual
            environment
        @type str
        @param argvList history list of command line arguments
        @type list of str
        @param wdList history list of working directories
        @type list of str
        @param envList history list of environment parameter settings
        @type list of str
        @param exceptions exception reporting flag
        @type bool
        @param parent parent widget of this dialog
        @type QWidget
        @param dialogType type of the start dialog
                <ul>
                <li>0 = start debug dialog</li>
                <li>1 = start run dialog</li>
                <li>2 = start coverage dialog</li>
                <li>3 = start profile dialog</li>
                </ul>
        @type int (0 to 3)
        @keyparam modfuncList history list of module functions
        @type list of str
        @keyparam tracePython flag indicating if the Python library should
            be traced as well
        @type bool
        @keyparam autoClearShell flag indicating, that the interpreter window
            should be cleared automatically
        @type bool
        @keyparam autoContinue flag indicating, that the debugger should not
            stop at the first executable line
        @type bool
        @keyparam autoFork flag indicating the automatic fork mode
        @type bool
        @keyparam forkChild flag indicating to debug the child after forking
        @type bool
        """
        super(StartDialog, self).__init__(parent)
        self.setModal(True)
        
        self.dialogType = dialogType
        if dialogType == 0:
            from .Ui_StartDebugDialog import Ui_StartDebugDialog
            self.ui = Ui_StartDebugDialog()
        elif dialogType == 1:
            from .Ui_StartRunDialog import Ui_StartRunDialog
            self.ui = Ui_StartRunDialog()
        elif dialogType == 2:
            from .Ui_StartCoverageDialog import Ui_StartCoverageDialog
            self.ui = Ui_StartCoverageDialog()
        elif dialogType == 3:
            from .Ui_StartProfileDialog import Ui_StartProfileDialog
            self.ui = Ui_StartProfileDialog()
        self.ui.setupUi(self)
        
        self.ui.venvComboBox.addItem("")
        self.ui.venvComboBox.addItems(
            sorted(e5App().getObject("VirtualEnvManager")
                   .getVirtualenvNames()))
        
        self.ui.workdirPicker.setMode(E5PathPickerModes.DirectoryMode)
        self.ui.workdirPicker.setDefaultDirectory(
            Preferences.getMultiProject("Workspace"))
        self.ui.workdirPicker.setInsertPolicy(QComboBox.InsertAtTop)
        self.ui.workdirPicker.setSizeAdjustPolicy(
            QComboBox.AdjustToMinimumContentsLength)
        
        self.clearButton = self.ui.buttonBox.addButton(
            self.tr("Clear Histories"), QDialogButtonBox.ActionRole)
        self.editButton = self.ui.buttonBox.addButton(
            self.tr("Edit History"), QDialogButtonBox.ActionRole)
        
        self.setWindowTitle(caption)
        self.ui.cmdlineCombo.clear()
        self.ui.cmdlineCombo.addItems(argvList)
        if len(argvList) > 0:
            self.ui.cmdlineCombo.setCurrentIndex(0)
        self.ui.workdirPicker.clear()
        self.ui.workdirPicker.addItems(wdList)
        if len(wdList) > 0:
            self.ui.workdirPicker.setCurrentIndex(0)
        self.ui.environmentCombo.clear()
        self.ui.environmentCombo.addItems(envList)
        self.ui.exceptionCheckBox.setChecked(exceptions)
        self.ui.clearShellCheckBox.setChecked(autoClearShell)
        self.ui.consoleCheckBox.setEnabled(
            Preferences.getDebugger("ConsoleDbgCommand") != "")
        self.ui.consoleCheckBox.setChecked(False)
        venvIndex = max(0, self.ui.venvComboBox.findText(lastUsedVenvName))
        self.ui.venvComboBox.setCurrentIndex(venvIndex)
        
        if dialogType == 0:        # start debug dialog
            self.ui.tracePythonCheckBox.setChecked(tracePython)
            self.ui.tracePythonCheckBox.show()
            self.ui.autoContinueCheckBox.setChecked(autoContinue)
            self.ui.forkModeCheckBox.setChecked(autoFork)
            self.ui.forkChildCheckBox.setChecked(forkChild)
        
        if dialogType == 1:       # start run dialog
            self.ui.forkModeCheckBox.setChecked(autoFork)
            self.ui.forkChildCheckBox.setChecked(forkChild)
        
        if dialogType == 3:       # start coverage or profile dialog
            self.ui.eraseCheckBox.setChecked(True)
        
        self.__clearHistoryLists = False
        self.__historiesModified = False
        
        msh = self.minimumSizeHint()
        self.resize(max(self.width(), msh.width()), msh.height())
        
    def on_modFuncCombo_editTextChanged(self):
        """
        Private slot to enable/disable the OK button.
        """
        self.ui.buttonBox.button(QDialogButtonBox.Ok).setDisabled(
            self.ui.modFuncCombo.currentText() == "")
        
    def getData(self):
        """
        Public method to retrieve the data entered into this dialog.
        
        @return a tuple of interpreter (string), argv (string), workdir
            (string), environment (string), exceptions flag (boolean),
            clear interpreter flag (boolean) and run in console flag (boolean)
        """
        cmdLine = self.ui.cmdlineCombo.currentText()
        workdir = self.ui.workdirPicker.currentText(toNative=False)
        environment = self.ui.environmentCombo.currentText()
        venvName = self.ui.venvComboBox.currentText()
        
        return (venvName,
                cmdLine,
                workdir,
                environment,
                self.ui.exceptionCheckBox.isChecked(),
                self.ui.clearShellCheckBox.isChecked(),
                self.ui.consoleCheckBox.isChecked(),
                )
        
    def getDebugData(self):
        """
        Public method to retrieve the debug related data entered into this
        dialog.
        
        @return a tuple of a flag indicating, if the Python library should be
            traced as well, a flag indicating, that the debugger should not
            stop at the first executable line (boolean), a flag indicating,
            that the debugger should fork automatically (boolean) and a flag
            indicating, that the debugger should debug the child process after
            forking automatically (boolean)
        """
        if self.dialogType == 0:
            return (self.ui.tracePythonCheckBox.isChecked(),
                    self.ui.autoContinueCheckBox.isChecked(),
                    self.ui.forkModeCheckBox.isChecked(),
                    self.ui.forkChildCheckBox.isChecked())
        else:
            return (False, False, False, False)
        
    def getRunData(self):
        """
        Public method to retrieve the debug related data entered into this
        dialog.
        
        @return a tuple of a flag indicating, that the debugger should fork
            automatically (boolean) and a flag indicating, that the debugger
            should debug the child process after forking automatically
            (boolean)
        """
        if self.dialogType == 1:
            return (self.ui.forkModeCheckBox.isChecked(),
                    self.ui.forkChildCheckBox.isChecked())
        else:
            return (False, False)
        
    def getCoverageData(self):
        """
        Public method to retrieve the coverage related data entered into this
        dialog.
        
        @return flag indicating erasure of coverage info (boolean)
        """
        if self.dialogType == 2:
            return self.ui.eraseCheckBox.isChecked()
        else:
            return False
        
    def getProfilingData(self):
        """
        Public method to retrieve the profiling related data entered into this
        dialog.
        
        @return flag indicating erasure of profiling info (boolean)
        """
        if self.dialogType == 3:
            return self.ui.eraseCheckBox.isChecked()
        else:
            return False
        
    def __clearHistories(self):
        """
        Private slot to clear the combo boxes lists and record a flag to
        clear the lists.
        """
        self.__clearHistoryLists = True
        self.__historiesModified = False    # clear catches it all
        
        cmdLine = self.ui.cmdlineCombo.currentText()
        workdir = self.ui.workdirPicker.currentText()
        environment = self.ui.environmentCombo.currentText()
        
        self.ui.cmdlineCombo.clear()
        self.ui.workdirPicker.clear()
        self.ui.environmentCombo.clear()
        
        self.ui.cmdlineCombo.addItem(cmdLine)
        self.ui.workdirPicker.addItem(workdir)
        self.ui.environmentCombo.addItem(environment)
    
    def __editHistory(self):
        """
        Private slot to edit a history list.
        """
        histories = [
            "",
            self.tr("Command Line"),
            self.tr("Working Directory"),
            self.tr("Environment"),
        ]
        historyKind, ok = QInputDialog.getItem(
            self,
            self.tr("Edit History"),
            self.tr("Select the history list to be edited:"),
            histories,
            0, False)
        if ok and historyKind:
            historiesIndex = histories.index(historyKind)
            if historiesIndex == 2:
                history = self.ui.workdirPicker.getPathItems()
            else:
                history = []
                if historiesIndex == 1:
                    combo = self.ui.cmdlineCombo
                else:
                    combo = self.ui.environmentCombo
                for index in range(combo.count()):
                    history.append(combo.itemText(index))
            
            from .StartHistoryEditDialog import StartHistoryEditDialog
            dlg = StartHistoryEditDialog(history, self)
            if dlg.exec_() == QDialog.Accepted:
                history = dlg.getHistory()
                if historiesIndex == 1:
                    combo = self.ui.cmdlineCombo
                elif historiesIndex == 2:
                    combo = self.ui.workdirPicker
                else:
                    combo = self.ui.environmentCombo
                combo.clear()
                combo.addItems(history)
                
                self.__historiesModified = True
    
    def historiesModified(self):
        """
        Public method to test for modified histories.
        
        @return flag indicating modified histories
        @rtype bool
        """
        return self.__historiesModified
    
    def clearHistories(self):
        """
        Public method to test, if histories shall be cleared.
        
        @return flag indicating histories shall be cleared
        @rtype bool
        """
        return self.__clearHistoryLists
    
    def getHistories(self):
        """
        Public method to get the lists of histories.
        
        @return tuple containing the histories of command line arguments,
            working directories, environment settings and interpreters
        @rtype tuple of four list of str
        """
        return (
            [self.ui.cmdlineCombo.itemText(index) for index in range(
                self.ui.cmdlineCombo.count())],
            self.ui.workdirPicker.getPathItems(),
            [self.ui.environmentCombo.itemText(index) for index in range(
                self.ui.environmentCombo.count())],
        )
    
    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.clearButton:
            self.__clearHistories()
        elif button == self.editButton:
            self.__editHistory()
