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

# Copyright (c) 2014 - 2018 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the Git version control plugin.
"""

from __future__ import unicode_literals

import os

from PyQt5.QtCore import QObject, QCoreApplication, QTranslator, QByteArray

from E5Gui.E5Application import e5App

import Preferences
from Preferences.Shortcuts import readShortcuts

from VcsPlugins.vcsGit.GitUtilities import getConfigPath

import Utilities
import UI.Info

# Start-Of-Header
name = "Git Plugin"
author = "Detlev Offenbach <detlev@die-offenbachs.de>"
autoactivate = False
deactivateable = True
version = UI.Info.VersionOnly
pluginType = "version_control"
pluginTypename = "Git"
className = "VcsGitPlugin"
packageName = "__core__"
shortDescription = "Implements the Git version control interface."
longDescription = \
    """This plugin provides the Git version control interface."""
pyqtApi = 2
python2Compatible = True
# End-Of-Header

error = ""


def exeDisplayData():
    """
    Public method to support the display of some executable info.
    
    @return dictionary containing the data to query the presence of
        the executable
    """
    exe = 'git'
    if Utilities.isWindowsPlatform():
        exe += '.exe'
    
    data = {
        "programEntry": True,
        "header": QCoreApplication.translate(
            "VcsGitPlugin", "Version Control - Git"),
        "exe": exe,
        "versionCommand": 'version',
        "versionStartsWith": 'git',
        "versionPosition": 2,
        "version": "",
        "versionCleanup": None,
    }
    
    return data


def getVcsSystemIndicator():
    """
    Public function to get the indicators for this version control system.
    
    @return dictionary with indicator as key and a tuple with the vcs name
        (string) and vcs display string (string)
    """
    global pluginTypename
    data = {}
    exe = 'git'
    if Utilities.isWindowsPlatform():
        exe += '.exe'
    if Utilities.isinpath(exe):
        data[".git"] = (pluginTypename, displayString())
        data["_git"] = (pluginTypename, displayString())
    return data


def displayString():
    """
    Public function to get the display string.
    
    @return display string (string)
    """
    exe = 'git'
    if Utilities.isWindowsPlatform():
        exe += '.exe'
    if Utilities.isinpath(exe):
        return QCoreApplication.translate('VcsGitPlugin', 'Git')
    else:
        return ""


gitCfgPluginObject = None


def createConfigurationPage(configDlg):
    """
    Module function to create the configuration page.
    
    @param configDlg reference to the configuration dialog (QDialog)
    @return reference to the configuration page
    """
    global gitCfgPluginObject
    from VcsPlugins.vcsGit.ConfigurationPage.GitPage import \
        GitPage
    if gitCfgPluginObject is None:
        gitCfgPluginObject = VcsGitPlugin(None)
    page = GitPage(gitCfgPluginObject)
    return page
    

def getConfigData():
    """
    Module function returning data as required by the configuration dialog.
    
    @return dictionary with key "zzz_gitPage" containing the relevant
        data
    """
    return {
        "zzz_gitPage":
        [QCoreApplication.translate("VcsGitPlugin", "Git"),
            os.path.join("VcsPlugins", "vcsGit", "icons",
                         "preferences-git.png"),
            createConfigurationPage, "vcsPage", None],
    }


def prepareUninstall():
    """
    Module function to prepare for an uninstallation.
    """
    if not e5App().getObject("PluginManager").isPluginLoaded(
            "PluginVcsGit"):
        Preferences.Prefs.settings.remove("Git")


def clearPrivateData():
    """
    Module function to clear the private data of the plug-in.
    """
    for key in ["RepositoryUrlHistory"]:
        VcsGitPlugin.setPreferences(key, [])
    

class VcsGitPlugin(QObject):
    """
    Class implementing the Git version control plugin.
    """
    GitDefaults = {
        "StopLogOnCopy": True,          # used in log browser
        "ShowAuthorColumns": True,      # used in log browser
        "ShowCommitterColumns": True,   # used in log browser
        "ShowCommitIdColumn": True,     # used in log browser
        "ShowBranchesColumn": True,     # used in log browser
        "ShowTagsColumn": True,         # used in log browser
        "FindCopiesHarder": False,      # used in log browser
        "LogLimit": 20,
        "LogSubjectColumnWidth": 30,
        "LogBrowserGeometry": QByteArray(),
        "LogBrowserSplitterStates": [QByteArray(), QByteArray(),
                                     QByteArray()],
        # mainSplitter, detailsSplitter, diffSplitter
        "StatusDialogGeometry": QByteArray(),
        "StatusDialogSplitterStates": [QByteArray(), QByteArray()],
        # vertical splitter, horizontal splitter
        "CommitMessages": 20,
        "Commits": [],
        "CommitIdLength": 10,
        "CleanupPatterns": "*.orig *.rej *~",
        "AggressiveGC": True,
        "RepositoryUrlHistory": [],
    }
    
    def __init__(self, ui):
        """
        Constructor
        
        @param ui reference to the user interface object (UI.UserInterface)
        """
        super(VcsGitPlugin, self).__init__(ui)
        self.__ui = ui
        
        self.__translator = None
        self.__loadTranslator()
        
        from VcsPlugins.vcsGit.ProjectHelper import GitProjectHelper
        self.__projectHelperObject = GitProjectHelper(None, None)
        try:
            e5App().registerPluginObject(
                pluginTypename, self.__projectHelperObject, pluginType)
        except KeyError:
            pass    # ignore duplicate registration
        
        readShortcuts(pluginName=pluginTypename)
    
    def getProjectHelper(self):
        """
        Public method to get a reference to the project helper object.
        
        @return reference to the project helper object
        """
        return self.__projectHelperObject

    def initToolbar(self, ui, toolbarManager):
        """
        Public slot to initialize the VCS toolbar.
        
        @param ui reference to the main window (UserInterface)
        @param toolbarManager reference to a toolbar manager object
            (E5ToolBarManager)
        """
        if self.__projectHelperObject:
            self.__projectHelperObject.initToolbar(ui, toolbarManager)
    
    def activate(self):
        """
        Public method to activate this plugin.
        
        @return tuple of reference to instantiated viewmanager and
            activation status (boolean)
        """
        from VcsPlugins.vcsGit.git import Git
        self.__object = Git(self, self.__ui)
        
        tbData = self.__ui.getToolbar("vcs")
        if tbData:
            tb = tbData[1]
            tb.setVisible(False)
            tb.setEnabled(False)
        
        tbData = self.__ui.getToolbar("git")
        if tbData:
            tb = tbData[1]
            tb.setVisible(True)
            tb.setEnabled(True)
        
        return self.__object, True
    
    def deactivate(self):
        """
        Public method to deactivate this plugin.
        """
        self.__object = None
        
        tbData = self.__ui.getToolbar("git")
        if tbData:
            tb = tbData[1]
            tb.setVisible(False)
            tb.setEnabled(False)
        
        tbData = self.__ui.getToolbar("vcs")
        if tbData:
            tb = tbData[1]
            tb.setVisible(True)
            tb.setEnabled(True)
    
    @classmethod
    def getPreferences(cls, key):
        """
        Class method to retrieve the various settings.
        
        @param key the key of the value to get
        @return the requested setting
        """
        if key in ["StopLogOnCopy", "ShowReflogInfo", "ShowAuthorColumns",
                   "ShowCommitterColumns", "ShowCommitIdColumn",
                   "ShowBranchesColumn", "ShowTagsColumn", "FindCopiesHarder",
                   "AggressiveGC"]:
            return Preferences.toBool(Preferences.Prefs.settings.value(
                "Git/" + key, cls.GitDefaults[key]))
        elif key in ["LogLimit", "CommitMessages", "CommitIdLength",
                     "LogSubjectColumnWidth"]:
            return int(Preferences.Prefs.settings.value(
                "Git/" + key, cls.GitDefaults[key]))
        elif key in ["Commits", "RepositoryUrlHistory"]:
            return Preferences.toList(Preferences.Prefs.settings.value(
                "Git/" + key))
        elif key in ["LogBrowserGeometry", "StatusDialogGeometry"]:
            v = Preferences.Prefs.settings.value("Git/" + key)
            if v is not None:
                return v
            else:
                return cls.GitDefaults[key]
        elif key in ["LogBrowserSplitterStates", "StatusDialogSplitterStates"]:
            states = Preferences.Prefs.settings.value("Git/" + key)
            if states is not None:
                return states
            else:
                return cls.GitDefaults[key]
        else:
            return Preferences.Prefs.settings.value(
                "Git/" + key, cls.GitDefaults[key])
    
    @classmethod
    def setPreferences(cls, key, value):
        """
        Class method to store the various settings.
        
        @param key the key of the setting to be set
        @param value the value to be set
        """
        Preferences.Prefs.settings.setValue("Git/" + key, value)

    def getConfigPath(self):
        """
        Public method to get the filename of the config file.
        
        @return filename of the config file (string)
        """
        return getConfigPath()
    
    def prepareUninstall(self):
        """
        Public method to prepare for an uninstallation.
        """
        e5App().unregisterPluginObject(pluginTypename)
    
    def prepareUnload(self):
        """
        Public method to prepare for an unload.
        """
        if self.__projectHelperObject:
            self.__projectHelperObject.removeToolbar(
                self.__ui, e5App().getObject("ToolbarManager"))
        e5App().unregisterPluginObject(pluginTypename)
    
    def __loadTranslator(self):
        """
        Private method to load the translation file.
        """
        if self.__ui is not None:
            loc = self.__ui.getLocale()
            if loc and loc != "C":
                locale_dir = os.path.join(
                    os.path.dirname(__file__), "vcsGit", "i18n")
                translation = "git_{0}".format(loc)
                translator = QTranslator(None)
                loaded = translator.load(translation, locale_dir)
                if loaded:
                    self.__translator = translator
                    e5App().installTranslator(self.__translator)
                else:
                    print("Warning: translation file '{0}' could not be"
                          " loaded.".format(translation))
                    print("Using default.")

#
# eflag: noqa = M801
