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

"""
***************************************************************************
    PreconfiguredAlgorithmDialog.py
    ---------------------
    Date                 : April 2016
    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__ = 'April 2016'
__copyright__ = '(C) 2016, Victor Olaya'

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

__revision__ = '$Format:%H$'


import os
import json
from processing.preconfigured.PreconfiguredUtils import algAsDict
from processing.preconfigured.PreconfiguredUtils import preconfiguredAlgorithmsFolder
from processing.gui.AlgorithmDialogBase import AlgorithmDialogBase
from processing.gui.AlgorithmDialog import AlgorithmDialog
from PyQt4.QtGui import QMessageBox, QPalette, QColor, QVBoxLayout, QLabel, \
    QLineEdit, QWidget


class PreconfiguredAlgorithmDialog(AlgorithmDialog):

    def __init__(self, alg, toolbox):
        AlgorithmDialog.__init__(self, alg)
        self.toolbox = toolbox
        self.cornerWidget.setVisible(False)
        self.btnRun.setText(self.tr("OK"))
        self.tabWidget.removeTab(1)
        self.settingsPanel = SettingsPanel()
        self.tabWidget.addTab(self.settingsPanel, "Description")

    def accept(self):
        try:
            self.setParamValues()
            msg = self.alg._checkParameterValuesBeforeExecuting()
            if msg:
                QMessageBox.warning(
                    self, self.tr('Unable to execute algorithm'), msg)
                return
            description = algAsDict(self.alg)
            description["name"] = self.settingsPanel.txtName.text().strip()
            description["group"] = self.settingsPanel.txtGroup.text().strip()
            if not (description["name"] and description["group"]):
                self.tabWidget.setCurrentIndex(self.tabWidget.count() - 1)
                return
            validChars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789:'
            filename = ''.join(c for c in description["name"] if c in validChars).lower() + ".json"
            filepath = os.path.join(preconfiguredAlgorithmsFolder(), filename)
            with open(filepath, "w") as f:
                json.dump(description, f)
            self.toolbox.updateProvider('preconfigured')
        except AlgorithmDialogBase.InvalidParameterValue as e:
            try:
                self.buttonBox.accepted.connect(lambda:
                                                e.widget.setPalette(QPalette()))
                palette = e.widget.palette()
                palette.setColor(QPalette.Base, QColor(255, 255, 0))
                e.widget.setPalette(palette)
                self.lblProgress.setText(
                    self.tr('<b>Missing parameter value: %s</b>') % e.parameter.description)
                return
            except:
                QMessageBox.critical(self,
                                     self.tr('Unable to execute algorithm'),
                                     self.tr('Wrong or missing parameter values'))
        self.close()


class SettingsPanel(QWidget):

    def __init__(self):
        QWidget.__init__(self)
        layout = QVBoxLayout()
        labelName = QLabel("Name")
        labelGroup = QLabel("Group")
        self.txtName = QLineEdit()
        self.txtGroup = QLineEdit()
        layout.addWidget(labelName)
        layout.addWidget(self.txtName)
        layout.addWidget(labelGroup)
        layout.addWidget(self.txtGroup)
        layout.addStretch()
        self.setLayout(layout)