# Created By: Virgil Dupras
# Created On: 2009-04-25
# Copyright 2010 Hardcoded Software (http://www.hardcoded.net)
# 
# This software is licensed under the "BSD" License as described in the "LICENSE" file, 
# which should be included with this package. The terms are also available at 
# http://www.hardcoded.net/licenses/bsd_license

import logging
import os
import os.path as op

from PyQt4.QtCore import QTimer, QObject, QCoreApplication, QUrl, QProcess, SIGNAL, pyqtSignal
from PyQt4.QtGui import QDesktopServices, QFileDialog, QDialog, QMessageBox, QApplication

from jobprogress import job
from jobprogress.qt import Progress
from hscommon.trans import tr, trmsg

from core.app import DupeGuru as DupeGuruBase, JOB_SCAN, JOB_LOAD, JOB_MOVE, JOB_COPY, JOB_DELETE

from qtlib.about_box import AboutBox
from qtlib.recent import Recent
from qtlib.reg import Registration

from . import platform
from .result_window import ResultWindow
from .directories_dialog import DirectoriesDialog
from .problem_dialog import ProblemDialog
from .util import createActions

JOBID2TITLE = {
    JOB_SCAN: tr("Scanning for duplicates"),
    JOB_LOAD: tr("Loading"),
    JOB_MOVE: tr("Moving"),
    JOB_COPY: tr("Copying"),
    JOB_DELETE: tr("Sending files to the recycle bin"),
}

class DupeGuru(DupeGuruBase, QObject):
    LOGO_NAME = '<replace this>'
    NAME = '<replace this>'
    DELTA_COLUMNS = frozenset()
    
    def __init__(self, data_module):
        appdata = str(QDesktopServices.storageLocation(QDesktopServices.DataLocation))
        if not op.exists(appdata):
            os.makedirs(appdata)
        # For basicConfig() to work, we have to be sure that no logging has taken place before this call.
        logging.basicConfig(filename=op.join(appdata, 'debug.log'), level=logging.WARNING)
        DupeGuruBase.__init__(self, data_module, appdata)
        QObject.__init__(self)
        self._setup()
    
    #--- Private
    def _setup(self):
        self._setupActions()
        self.prefs = self._create_preferences()
        self.prefs.load()
        self._update_options()
        self.recentResults = Recent(self, 'recentResults')
        self.recentResults.mustOpenItem.connect(self.load_from)
        self.resultWindow = self._create_result_window()
        self._progress = Progress(self.resultWindow)
        self.directories_dialog = DirectoriesDialog(self.resultWindow, self)
        self.details_dialog = self._create_details_dialog(self.resultWindow)
        self.problemDialog = ProblemDialog(parent=self.resultWindow, app=self)
        self.preferences_dialog = self._create_preferences_dialog(self.resultWindow)
        self.about_box = AboutBox(self.resultWindow, self)
        
        
        self.reg = Registration(self)
        self.set_registration(self.prefs.registration_code, self.prefs.registration_email)
        if not self.registered and self.unpaid_hours >= 1:
            # The timer scheme is because if the nag is not shown before the application is 
            # completely initialized, the nag will be shown before the app shows up in the task bar
            # In some circumstances, the nag is hidden by other window, which may make the user think
            # that the application haven't launched.
            QTimer.singleShot(0, self.reg.show_nag)
        self.directories_dialog.show()
        self.load()
        
        self.connect(QCoreApplication.instance(), SIGNAL('aboutToQuit()'), self.application_will_terminate)
        self.connect(self._progress, SIGNAL('finished(QString)'), self.job_finished)
    
    def _setupActions(self):
        # Setup actions that are common to both the directory dialog and the results window.
        # (name, shortcut, icon, desc, func)
        ACTIONS = [
            ('actionQuit', 'Ctrl+Q', '', tr("Quit"), self.quitTriggered),
            ('actionPreferences', 'Ctrl+P', '', tr("Preferences"), self.preferencesTriggered),
            ('actionShowHelp', 'F1', '', tr("dupeGuru Help"), self.showHelpTriggered),
            ('actionAbout', '', '', tr("About dupeGuru"), self.showAboutBoxTriggered),
            ('actionRegister', '', '', tr("Register dupeGuru"), self.registerTriggered),
            ('actionCheckForUpdate', '', '', tr("Check for Update"), self.checkForUpdateTriggered),
            ('actionOpenDebugLog', '', '', tr("Open Debug Log"), self.openDebugLogTriggered),
        ]
        createActions(ACTIONS, self)
    
    def _setup_as_registered(self):
        self.prefs.registration_code = self.registration_code
        self.prefs.registration_email = self.registration_email
        self.actionRegister.setVisible(False)
        self.about_box.registerButton.hide()
        self.about_box.registeredEmailLabel.setText(self.prefs.registration_email)
    
    def _update_options(self):
        self.scanner.mix_file_kind = self.prefs.mix_file_kind
        self.options['escape_filter_regexp'] = self.prefs.use_regexp
        self.options['clean_empty_dirs'] = self.prefs.remove_empty_folders
        self.options['ignore_hardlink_matches'] = self.prefs.ignore_hardlink_matches
    
    #--- Virtual
    def _create_details_dialog(self, parent):
        raise NotImplementedError()
    
    def _create_result_window(self):
        return ResultWindow(app=self)
    
    def _create_preferences(self):
        raise NotImplementedError()
    
    def _create_preferences_dialog(self, parent):
        raise NotImplementedError()
    
    #--- Override
    @staticmethod
    def _open_path(path):
        url = QUrl.fromLocalFile(str(path))
        QDesktopServices.openUrl(url)
    
    @staticmethod
    def _reveal_path(path):
        DupeGuru._open_path(path[:-1])
    
    def _start_job(self, jobid, func, *args):
        title = JOBID2TITLE[jobid]
        try:
            j = self._progress.create_job()
            args = tuple([j] + list(args))
            self._progress.run(jobid, title, func, args=args)
        except job.JobInProgressError:
            msg = trmsg("TaskHangingMsg")
            QMessageBox.information(self.resultWindow, 'Action in progress', msg)
    
    def add_selected_to_ignore_list(self):
        dupes = self.without_ref(self.selected_dupes)
        if not dupes:
            return
        title = tr("Add to Ignore List")
        msg = trmsg("IgnoreConfirmMsg").format(len(dupes))
        if self.confirm(title, msg):
            DupeGuruBase.add_selected_to_ignore_list(self)
    
    def copy_or_move_marked(self, copy):
        opname = tr("copy") if copy else tr("move")
        title = trmsg("SelectCopyOrMoveDestinationMsg").format(opname)
        flags = QFileDialog.ShowDirsOnly
        destination = str(QFileDialog.getExistingDirectory(self.resultWindow, title, '', flags))
        if not destination:
            return
        recreate_path = self.prefs.destination_type
        DupeGuruBase.copy_or_move_marked(self, copy, destination, recreate_path)
    
    def remove_selected(self):
        dupes = self.without_ref(self.selected_dupes)
        if not dupes:
            return
        title = tr("Remove duplicates")
        msg = trmsg("FileRemovalConfirmMsg").format(len(dupes))
        if self.confirm(title, msg):
            DupeGuruBase.remove_selected(self)
    
    #--- Public
    def askForRegCode(self):
        self.reg.ask_for_code()
    
    def confirm(self, title, msg, default_button=QMessageBox.Yes):
        active = QApplication.activeWindow()
        buttons = QMessageBox.Yes | QMessageBox.No
        answer = QMessageBox.question(active, title, msg, buttons, default_button)
        return answer == QMessageBox.Yes
    
    def invokeCustomCommand(self):
        cmd = self.prefs.custom_command
        if cmd:
            self.invoke_command(cmd)
        else:
            msg = trmsg("NoCustomCommandMsg")
            QMessageBox.warning(self.resultWindow, tr("Custom Command"), msg)
    
    def show_details(self):
        self.details_dialog.show()
    
    def showResultsWindow(self):
        self.resultWindow.show()
    
    #--- Signals
    willSavePrefs = pyqtSignal()
    
    #--- Events
    def application_will_terminate(self):
        self.willSavePrefs.emit()
        self.prefs.save()
        self.save()
    
    def checkForUpdateTriggered(self):
        QProcess.execute('updater.exe', ['/checknow'])
    
    def job_finished(self, jobid):
        self._job_completed(jobid)
        if jobid in (JOB_MOVE, JOB_COPY, JOB_DELETE):
            if self.results.problems:
                self.problemDialog.show()
            else:
                msg = trmsg("OperationSuccessMsg")
                QMessageBox.information(self.resultWindow, tr("Operation Complete"), msg)
        elif jobid == JOB_SCAN:
            if not self.results.groups:
                title = tr("Scan complete")
                msg = trmsg("NoDuplicateFoundMsg")
                QMessageBox.information(self.resultWindow, title, msg)
            else:
                self.showResultsWindow()
        elif jobid == JOB_LOAD:
            self.showResultsWindow()
    
    def openDebugLogTriggered(self):
        debugLogPath = op.join(self.appdata, 'debug.log')
        self._open_path(debugLogPath)
    
    def preferencesTriggered(self):
        self.preferences_dialog.load()
        result = self.preferences_dialog.exec_()
        if result == QDialog.Accepted:
            self.preferences_dialog.save()
            self.prefs.save()
            self._update_options()
    
    def quitTriggered(self):
        self.directories_dialog.close()
    
    def registerTriggered(self):
        self.reg.ask_for_code()
    
    def showAboutBoxTriggered(self):
        self.about_box.show()
    
    def showHelpTriggered(self):
        base_path = platform.HELP_PATH.format(self.EDITION)
        url = QUrl.fromLocalFile(op.abspath(op.join(base_path, 'index.html')))
        QDesktopServices.openUrl(url)