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

"""
***************************************************************************
    HistoryDialog.py
    ---------------------
    Date                 : August 2012
    Copyright            : (C) 2012 by Victor Olaya
    Email                : volayaf at gmail dot com
***************************************************************************
*                                                                         *
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU General Public License as published by  *
*   the Free Software Foundation; either version 2 of the License, or     *
*   (at your option) any later version.                                   *
*                                                                         *
***************************************************************************
"""

__author__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'

import os

from PyQt4 import uic
from PyQt4.QtCore import Qt
from PyQt4.QtGui import QAction, QPushButton, QDialogButtonBox, QIcon, QStyle, QMessageBox, QFileDialog, QMenu, QTreeWidgetItem
from processing.gui import TestTools
from processing.core.ProcessingLog import ProcessingLog

pluginPath = os.path.split(os.path.dirname(__file__))[0]
WIDGET, BASE = uic.loadUiType(
    os.path.join(pluginPath, 'ui', 'DlgHistory.ui'))


class HistoryDialog(BASE, WIDGET):

    def __init__(self):
        super(HistoryDialog, self).__init__(None)
        self.setupUi(self)

        self.groupIcon = QIcon()
        self.groupIcon.addPixmap(self.style().standardPixmap(
            QStyle.SP_DirClosedIcon), QIcon.Normal, QIcon.Off)
        self.groupIcon.addPixmap(self.style().standardPixmap(
            QStyle.SP_DirOpenIcon), QIcon.Normal, QIcon.On)

        self.keyIcon = QIcon()
        self.keyIcon.addPixmap(self.style().standardPixmap(QStyle.SP_FileIcon))

        self.clearButton = QPushButton(self.tr('Clear'))
        self.clearButton.setToolTip(self.tr('Clear history'))
        self.buttonBox.addButton(self.clearButton, QDialogButtonBox.ActionRole)

        self.saveButton = QPushButton(self.tr('Save As...'))
        self.saveButton.setToolTip(self.tr('Save history'))
        self.buttonBox.addButton(self.saveButton, QDialogButtonBox.ActionRole)

        self.tree.doubleClicked.connect(self.executeAlgorithm)
        self.tree.currentItemChanged.connect(self.changeText)
        self.clearButton.clicked.connect(self.clearLog)
        self.saveButton.clicked.connect(self.saveLog)

        self.tree.setContextMenuPolicy(Qt.CustomContextMenu)
        self.tree.customContextMenuRequested.connect(self.showPopupMenu)

        self.fillTree()

    def clearLog(self):
        reply = QMessageBox.question(self,
                                     self.tr('Confirmation'),
                                     self.tr('Are you sure you want to clear the history?'),
                                     QMessageBox.Yes | QMessageBox.No,
                                     QMessageBox.No
                                     )
        if reply == QMessageBox.Yes:
            ProcessingLog.clearLog()
            self.fillTree()

    def saveLog(self):
        fileName = QFileDialog.getSaveFileName(self,
                                               self.tr('Save file'), '.', self.tr('Log files (*.log *.LOG)'))

        if fileName == '':
            return

        if not fileName.lower().endswith('.log'):
            fileName += '.log'

        ProcessingLog.saveLog(fileName)

    def fillTree(self):
        self.tree.clear()
        elements = ProcessingLog.getLogEntries()
        for category in elements.keys():
            groupItem = QTreeWidgetItem()
            groupItem.setText(0, category)
            groupItem.setIcon(0, self.groupIcon)
            for entry in elements[category]:
                item = TreeLogEntryItem(entry, category
                                        == ProcessingLog.LOG_ALGORITHM)
                item.setIcon(0, self.keyIcon)
                groupItem.insertChild(0, item)
            self.tree.addTopLevelItem(groupItem)

    def executeAlgorithm(self):
        item = self.tree.currentItem()
        if isinstance(item, TreeLogEntryItem):
            if item.isAlg:
                script = 'import processing\n'
                script += item.entry.text.replace('runalg(', 'runandload(')
                exec(script)

    def changeText(self):
        item = self.tree.currentItem()
        if isinstance(item, TreeLogEntryItem):
            self.text.setText(item.entry.text.replace('|', '\n'))

    def createTest(self):
        item = self.tree.currentItem()
        if isinstance(item, TreeLogEntryItem):
            if item.isAlg:
                TestTools.createTest(item.entry.text)

    def showPopupMenu(self, point):
        return
        item = self.tree.currentItem()
        if isinstance(item, TreeLogEntryItem):
            if item.isAlg:
                popupmenu = QMenu()
                createTestAction = QAction(self.tr('Create test'), self.tree)
                createTestAction.triggered.connect(self.createTest)
                popupmenu.addAction(createTestAction)
                popupmenu.exec_(self.tree.mapToGlobal(point))


class TreeLogEntryItem(QTreeWidgetItem):

    def __init__(self, entry, isAlg):
        QTreeWidgetItem.__init__(self)
        self.entry = entry
        self.isAlg = isAlg
        self.setText(0, '[' + entry.date + '] ' + entry.text.split('|')[0])