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

#-------------------------------------------------------------------------------

# This file is part of Code_Saturne, a general-purpose CFD tool.
#
# Copyright (C) 1998-2018 EDF S.A.
#
# 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.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
# Street, Fifth Floor, Boston, MA 02110-1301, USA.

#-------------------------------------------------------------------------------

"""
This module defines the Page for the physical properties of the fluid.
These properties can be reference value or initial value

This module contens the following classes and function:
- FluidCaracteristicsModel
- FluidCaracteristicsModelTestCase
"""

#-------------------------------------------------------------------------------
# Library modules import
#-------------------------------------------------------------------------------

import os, sys, unittest

#-------------------------------------------------------------------------------
# Application modules import
#-------------------------------------------------------------------------------

from code_saturne.Base.Common import *
import code_saturne.Base.Toolbox as Tool
from code_saturne.Base.XMLvariables import Variables, Model
from code_saturne.Base.XMLmodel import XMLmodel, ModelTest

#-------------------------------------------------------------------------------
# EOS
#-------------------------------------------------------------------------------

EOS = 1
try:
   import eosAva
except:
   EOS = 0
else :
   import eosAva

#-------------------------------------------------------------------------------
# Model class
#-------------------------------------------------------------------------------

class FluidCharacteristicsModel(Variables, Model):
    """
    Class to manipulate Molecular Properties in xml file.
    """
    def __init__(self, case):
        """FluidCharacteristicsModel Constuctor."""
        self.case = case
        self.node_models = self.case.xmlGetNode('thermophysical_models')
        self.node_prop   = self.case.xmlGetNode('physical_properties')
        self.node_fluid  = self.node_prop.xmlInitNode('fluid_properties')
        self.node_comp   = self.node_models.xmlInitNode('compressible_model', 'model')
        self.node_gas    = self.node_models.xmlInitNode('gas_combustion',     'model')
        self.node_coal   = self.node_models.xmlInitNode('solid_fuels',        'model')

        self.node_density   = self.setNewFluidProperty(self.node_fluid, 'density')
        self.node_viscosity = self.setNewFluidProperty(self.node_fluid, 'molecular_viscosity')
        self.node_heat      = self.setNewFluidProperty(self.node_fluid, 'specific_heat')
        self.node_cond      = self.setNewFluidProperty(self.node_fluid, 'thermal_conductivity')

        import code_saturne.cs_config as cs_config
        cfg = cs_config.config()
        self.freesteam = 0
        if cfg.libs['freesteam'].have != "no":
            self.freesteam = 1

        self.coolprop = 0
        if cfg.libs['coolprop'].have != "no":
            self.coolprop = 1


    def __nodeFromTag(self, name):
        """
        Private method : return node with attibute name 'name'
        """
        if self.node_coal['model'] != None and self.node_coal['model'] != 'off':
            self.node_dyn = self.setNewFluidProperty(self.node_fluid, 'dynamic_diffusion')
            self.nodeList = (self.node_density, self.node_viscosity,
                             self.node_heat, self.node_cond, self.node_dyn)

        elif self.node_gas['model'] != None and self.node_gas['model'] != 'off':
            self.node_dyn = self.setNewFluidProperty(self.node_fluid, 'dynamic_diffusion')
            self.nodeList = (self.node_density, self.node_viscosity,
                             self.node_heat, self.node_dyn)

        elif self.node_comp['model'] != None and self.node_comp['model'] != 'off':
            self.node_vol_visc  = self.setNewFluidProperty(self.node_fluid, 'volume_viscosity')
            self.node_dyn = self.setNewFluidProperty(self.node_fluid, 'dynamic_diffusion')
            self.node_cond      = self.setNewFluidProperty(self.node_fluid, 'thermal_conductivity')
            self.nodeList = (self.node_density, self.node_viscosity,
                             self.node_heat, self.node_vol_visc, self.node_dyn, self.node_cond)
        else:
            self.node_cond      = self.setNewFluidProperty(self.node_fluid, 'thermal_conductivity')
            self.nodeList = (self.node_density, self.node_viscosity,
                             self.node_heat, self.node_cond)

        for node in self.nodeList:
            if node['name'] == name:
                return node


    def defaultFluidCharacteristicsValues(self):
        """
        Return in a dictionnary which contains default values.
        (also called by CoalCombustionModel)
        """
        default = {}

        #Initial values for properties: 20 Celsius degrees air at atmospheric pressure

        default['density']              = 1.17862
        default['molecular_viscosity']  = 1.83e-05
        default['specific_heat']        = 1017.24
        default['thermal_conductivity'] = 0.02495
        default['dynamic_diffusion']    = 0.01
        default['volume_viscosity']    = 0.
        default['material']             = "user_material"
        default['method']               = "user_properties"
        default['phas']                 = "liquid"

        return default


    @Variables.noUndo
    def getThermoPhysicalModel(self):
        """
        Return values of attribute "model" of all thermophysical model nodes.
        (also called by NumericalParamGlobalView and TimeStepView)
        """
        d = {}
        d['joule_effect']       = 'off'
        d['gas_combustion']     = 'off'
        d['solid_fuels']        = 'off'
        d['thermal_scalar']     = 'off'
        d['atmospheric_flows']  = 'off'
        d['compressible_model'] = 'off'

        node1 = self.node_models.xmlGetNode('gas_combustion',    'model')
        node2 = self.node_models.xmlGetNode('solid_fuels',       'model')
        node3 = self.node_models.xmlGetNode('joule_effect',      'model')
        node4 = self.node_models.xmlGetNode('thermal_scalar',    'model')
        node5 = self.node_models.xmlGetNode('atmospheric_flows', 'model')
        node6 = self.node_models.xmlGetNode('compressible_model', 'model')

        for node in (node1, node2, node3, node4, node5, node6):
            if node:
                if node['model'] == "":
                    node['model'] = "off"
                if node['model'] != 'off':
                    d[node.el.tagName] = node['model']

        return d['atmospheric_flows'], \
               d['joule_effect'],      \
               d['thermal_scalar'],    \
               d['gas_combustion'],    \
               d['solid_fuels'],    \
               d['compressible_model']


    @Variables.noUndo
    def getMaterials(self):
        """
        get the nature of materials
        """
        nodem = self.node_fluid.xmlGetNode('material')
        if nodem == None:
            material = self.defaultFluidCharacteristicsValues()['material']
            self.setMaterials(material)
            nodem = self.node_fluid.xmlGetNode('material')
        material = nodem['choice']
        return material


    @Variables.undoLocal
    def setMaterials(self, material):
        """
        set the nature of materials
        """
        childNode = self.node_fluid.xmlInitChildNode('material')
        m = childNode.xmlGetNode('material')
        oldMaterial = None
        if m != None:
            oldMaterial = m['choice']
        childNode.xmlSetAttribute(choice = material)
        self.updateMethod(oldMaterial)

        if material == "user_material":
            for node in self.node_fluid.xmlGetChildNodeList('property'):
                if node['choice'] == "thermal_law":
                    node['choice'] = "variable"


    @Variables.noUndo
    def getMethod(self):
        """
        get the nature of materials
        """
        nodem = self.node_fluid.xmlGetNode('method')
        if nodem == None:
            method = self.defaultFluidCharacteristicsValues()['method']
            self.setMethod(method)
            nodem = self.node_fluid.xmlGetNode('method')
        method = nodem['choice']
        return method


    @Variables.undoLocal
    def setMethod(self, method):
        """
        update reference value for EOS
        """
        childNode = self.node_fluid.xmlInitChildNode('method')
        childNode.xmlSetAttribute(choice = method)
        self.getReference()

        # suppress phas choice if not EOS
        if method == self.defaultFluidCharacteristicsValues()['method'] or \
           method == "freesteam" or method == "CoolProp":
            nodem = self.node_fluid.xmlGetNode('phas')
            if nodem:
                nodem.xmlRemoveNode()


    @Variables.undoGlobal
    def updateMethod(self, oldMaterial):
        """
        update reference value for EOS
        """
        material = self.getMaterials()
        if oldMaterial != material:
            if material == self.defaultFluidCharacteristicsValues()['material'] :
               self.setMethod(self.defaultFluidCharacteristicsValues()['method'])
            elif EOS == 1:
               self.ava = eosAva.EosAvailable()
               self.ava.setMethods(material)
               self.setMethod(self.ava.whichMethods()[0])
            elif self.coolprop == 1:
                self.setMethod("CoolProp")
            else:
                self.setMethod("freesteam")
            # suppress phas choice if not EOS
            if self.getMethod() == self.defaultFluidCharacteristicsValues()['method'] or \
               self.getMethod() == "freesteam" or self.getMethod() == "CoolProp":
                nodem = self.node_fluid.xmlGetNode('phas')
                if nodem:
                   nodem.xmlRemoveNode()


    @Variables.noUndo
    def getReference(self):
        """
        return reference value for EOS
        """
        reference = ""
        material = self.getMaterials()
        method = self.getMethod()
        if material == "user_material":
            reference = material
        else:
            if self.freesteam == 1:
                if self.getMethod() == "freesteam":
                    reference = "freesteam"
            if self.coolprop == 1:
                if self.getMethod() == "CoolProp":
                    reference = "CoolProp"
            if EOS == 1:
                if self.getMethod() != "freesteam" and self.getMethod() != "CoolProp":
                    phas = self.getFieldNature()
                    self.ava = eosAva.EosAvailable()
                    self.ava.setMethods(material)
                    self.ava.setReferences(material, self.getMethod())
                    ref = self.ava.whichReferences()

                    if phas == "liquid":
                        reference = ref[0]
                    elif phas == "gas":
                        reference = ref[1]
        # update XML
        childNode = self.node_fluid.xmlInitChildNode('reference')
        childNode.xmlSetAttribute(choice = reference)

        return reference


    @Variables.noUndo
    def getFieldNature(self):
        """
        get field nature for EOS
        """
        nodem = self.node_fluid.xmlGetNode('phas')
        if nodem == None:
            nature = self.defaultFluidCharacteristicsValues()['phas']
            self.setFieldNature(nature)
            nodem = self.node_fluid.xmlGetNode('phas')
        nature = nodem['choice']
        return nature


    @Variables.noUndo
    def setFieldNature(self, nature):
        """
        set field nature for EOS
        """
        self.isInList(nature, ('liquid', 'gas'))
        childNode = self.node_fluid.xmlInitChildNode('phas')
        childNode.xmlSetAttribute(choice = nature)


    @Variables.noUndo
    def getInitialValue(self, tag):
        """
        Return initial value of the markup tag : 'density', or
        'molecular_viscosity', or 'specific_heat'or 'thermal_conductivity'
        """
        self.isInList(tag, ('density', 'molecular_viscosity',
                            'specific_heat', 'thermal_conductivity',
                            'volume_viscosity', 'dynamic_diffusion'))
        node = self.node_fluid.xmlGetNode('property', name=tag)
        pp = node.xmlGetDouble('initial_value')
        if pp == None:
            pp = self.defaultFluidCharacteristicsValues()[tag]
            self.setInitialValue(tag, pp)
        return pp


    @Variables.undoLocal
    def setInitialValue(self, tag, val):
        """
        Put initial value for the markup tag : 'density', or
        'molecular_viscosity', or 'specific_heat'or 'thermal_conductivity'
        """
        self.isInList(tag, ('density', 'molecular_viscosity',
                            'specific_heat', 'thermal_conductivity',
                            'volume_viscosity', 'dynamic_diffusion'))
        if tag != 'volume_viscosity':
            self.isGreater(val, 0.)
        else:
            self.isPositiveFloat(val)
        node = self.node_fluid.xmlGetNode('property', name=tag)
        node.xmlSetData('initial_value', val)


    @Variables.noUndo
    def getInitialValueDensity(self):
        """Return initial value of density"""
        return self.getInitialValue('density')


    @Variables.undoLocal
    def setInitialValueDensity(self, val):
        """Put initial value for density"""
        self.setInitialValue('density', val)


    @Variables.noUndo
    def getInitialValueViscosity(self):
        """Return initial value of viscosity"""
        return self.getInitialValue('molecular_viscosity')


    @Variables.undoLocal
    def setInitialValueViscosity(self, val):
        """Put initial value for viscosity"""
        self.setInitialValue('molecular_viscosity', val)


    @Variables.noUndo
    def getInitialValueVolumicViscosity(self):
        """Return initial value of volumic viscosity"""
        return self.getInitialValue('volume_viscosity')


    @Variables.undoLocal
    def setInitialValueVolumicViscosity(self, val):
        """Put initial value for volumic viscosity"""
        self.setInitialValue('volume_viscosity', val)


    @Variables.noUndo
    def getInitialValueHeat(self):
        """Return initial value of specific heat"""
        return self.getInitialValue('specific_heat')


    @Variables.undoLocal
    def setInitialValueHeat(self, val):
        """Put initial value for specific heat"""
        self.setInitialValue('specific_heat', val)


    @Variables.noUndo
    def getInitialValueCond(self):
        """Return initial value of conductivity"""
        return self.getInitialValue('thermal_conductivity')


    @Variables.undoLocal
    def setInitialValueCond(self, val):
        """Put initial value for conductivity"""
        self.setInitialValue('thermal_conductivity', val)


    @Variables.noUndo
    def getInitialValueDyn(self):
        """Return initial value of conductivity"""
        return self.getInitialValue('dynamic_diffusion')


    @Variables.undoLocal
    def setInitialValueDyn(self, val):
        """Put initial value for conductivity"""
        self.setInitialValue('dynamic_diffusion', val)


    @Variables.noUndo
    def getFormula(self, tag):
        """
        Return a formula for I{tag} 'density', 'molecular_viscosity',
        'specific_heat' or 'thermal_conductivity'
        """
        self.isInList(tag, ('density', 'molecular_viscosity',
                            'specific_heat', 'thermal_conductivity',
                            'volume_viscosity'))
        node = self.node_fluid.xmlGetNode('property', name=tag)
        formula = node.xmlGetString('formula')
        if not formula:
            formula = self.getDefaultFormula(tag)
            self.setFormula(tag, formula)
        return formula


    @Variables.noUndo
    def getDefaultFormula(self, tag):
        """
        Return default formula
        """
        self.isInList(tag, ('density', 'molecular_viscosity',
                            'specific_heat', 'thermal_conductivity',
                            'volume_viscosity'))

        formula = tag + " = -1.;"

        return formula


    @Variables.undoLocal
    def setFormula(self, tag, str):
        """
        Gives a formula for 'density', 'molecular_viscosity',
        'specific_heat'or 'thermal_conductivity'
        """
        self.isInList(tag, ('density', 'molecular_viscosity',
                            'specific_heat', 'thermal_conductivity',
                            'volume_viscosity'))
        node = self.node_fluid.xmlGetNode('property', name=tag)
        node.xmlSetData('formula', str)


    @Variables.noUndo
    def getPropertyMode(self, tag):
        """Return choice of node I{tag}. Choice is constant or variable"""
        self.isInList(tag, ('density', 'molecular_viscosity',
                            'specific_heat', 'thermal_conductivity',
                            'volume_viscosity'))
        node = self.__nodeFromTag(tag)
        c = node['choice']
        self.isInList(c, ('constant', 'thermal_law', 'variable'))
        return c


    @Variables.undoGlobal
    def setPropertyMode(self, tag, choice):
        """Put choice in xml file's node I{tag}"""
        self.isInList(tag, ('density', 'molecular_viscosity',
                            'specific_heat', 'thermal_conductivity',
                            'volume_viscosity'))
        self.isInList(choice, ('constant', 'thermal_law', 'variable'))

        node = self.__nodeFromTag(tag)
        node['choice'] = choice

        if choice == 'constant':

            if tag == 'density':
                from code_saturne.Pages.TimeStepModel import TimeStepModel
                TimeStepModel(self.case).RemoveThermalTimeStepNode()
                del TimeStepModel
        else:
            if node.xmlGetNode('listing_printing'):
                node.xmlRemoveChild('listing_printing')
            if node.xmlGetNode('postprocessing_recording'):
                node.xmlRemoveChild('postprocessing_recording')


##    def RemoveThermoConductNode(self):
##        """Remove balise property for thermal_conductivity"""
##        self.node_fluid.xmlRemoveChild('property', name='thermal_conductivity')



#-------------------------------------------------------------------------------
# FluidCharacteristicsModel test case
#-------------------------------------------------------------------------------


class FluidCharacteristicsModelTestCase(ModelTest):
    """
    """
    def checkFluidCharacteristicsInstantiation(self):
        """Check whether the FluidCaracteristicsModel class could be instantiated"""
        model = None
        model = FluidCharacteristicsModel(self.case)
        assert model != None, 'Could not instantiate FluidCaracteristicsModel'

    def checkGetThermoPhysicalModel(self):
        """Check whether thermal physical models could be get"""
        mdl = FluidCharacteristicsModel(self.case)
        from code_saturne.Pages.ThermalScalarModel import ThermalScalarModel
        ThermalScalarModel(self.case).setThermalModel('temperature_celsius')
        del ThermalScalarModel
        assert mdl.getThermoPhysicalModel() == ('off', 'off', 'temperature_celsius', 'off', 'off', 'off'),\
        'Could not get thermophysical models in FluidCaracteristicsModel'

    def checkSetandGetInitialValue(self):
        """Check whether the initial value for the properties could be set and get"""
        mdl = FluidCharacteristicsModel(self.case)
        mdl.setInitialValue('density', 123.0)
        mdl.setInitialValue('molecular_viscosity', 1.5e-5)
        mdl.setInitialValue('specific_heat', 1212)
        mdl.setInitialValue('thermal_conductivity', 0.04)
        doc = '''<fluid_properties>
                    <property choice="constant" label="Density" name="density">
                        <initial_value>123</initial_value>
                    </property>
                    <property choice="constant" label="LamVisc" name="molecular_viscosity">
                        <initial_value>1.5e-05</initial_value>
                    </property>
                    <property choice="constant" label="Sp. heat" name="specific_heat">
                        <initial_value>1212</initial_value>
                    </property>
                    <property choice="constant" label="Th. cond" name="thermal_conductivity">
                        <initial_value>0.04</initial_value>
                    </property>
                 </fluid_properties>'''
        assert mdl.node_fluid == self.xmlNodeFromString(doc),\
        'Could not set initial value for properties in FluidCharacteristicsModel model'
        assert mdl.getInitialValue('specific_heat') == 1212.,\
         'Could not get initial value for properties in FluidCharacteristicsModel model'

    def checkSetandGetInitialValueDensity(self):
        """Check whether the initial value for density could be set and get"""
        mdl = FluidCharacteristicsModel(self.case)
        mdl.setInitialValueDensity(89.98)
        doc = '''<property choice="constant" label="Density" name="density">
                    <initial_value>89.98</initial_value>
                 </property>'''
        assert mdl.node_density == self.xmlNodeFromString(doc),\
        'Could not set initial value of density'
        assert mdl.getInitialValueDensity() == 89.98,\
        'Could not get initial value of density'

    def checkSetandGetInitialValueViscosity(self):
        """Check whether the initial value for molecular_viscosity could be set and get"""
        mdl = FluidCharacteristicsModel(self.case)
        mdl.setInitialValueViscosity(1.2e-4)
        doc = '''<property choice="constant" label="LamVisc" name="molecular_viscosity">
                    <initial_value>1.2e-4</initial_value>
                 </property>'''
        assert mdl.node_viscosity == self.xmlNodeFromString(doc),\
        'Could not set initial value of molecular_viscosity'
        assert mdl.getInitialValueViscosity() == 1.2e-4,\
        'Could not get initial value of molecular_viscosity'

    def checkSetandGetInitialValueHeat(self):
        """Check whether the initial value for specific_heat could be set and get"""
        mdl = FluidCharacteristicsModel(self.case)
        mdl.setInitialValueHeat(456.9)
        doc = '''<property choice="constant" label="Sp. heat" name="specific_heat">
                    <initial_value>456.9</initial_value>
                 </property>'''
        assert mdl.node_heat == self.xmlNodeFromString(doc),\
        'Could not set initial value of specific_heat'
        assert mdl.getInitialValueHeat() == 456.9,\
        'Could not get initial value of specific_heat'

    def checkSetandGetInitialValueCond(self):
        """Check whether the initial value for thermal_conductivity could be set and get"""
        mdl = FluidCharacteristicsModel(self.case)
        mdl.setInitialValueCond(456.9)
        doc = '''<property choice="constant" label="Th. cond" name="thermal_conductivity">
                    <initial_value>456.9</initial_value>
                 </property>'''
        assert mdl.node_cond == self.xmlNodeFromString(doc),\
        'Could not set initial value of thermal_conductivity'
        assert mdl.getInitialValueCond() == 456.9,\
        'Could not get initial value of thermal_conductivity'

    def checkSetandGetPropertyMode(self):
        """Check whether choice constant or variable could be set and get"""
        mdl = FluidCharacteristicsModel(self.case)
        mdl.setPropertyMode('density', 'variable')
        doc = '''<property choice="variable" label="Density" name="density">
                    <initial_value>1.17862</initial_value>
                 </property>'''
        assert mdl.node_density == self.xmlNodeFromString(doc),\
        'Could not set choice constant or variable for property'
        assert mdl.getPropertyMode('density') == 'variable',\
        'Could not get choice constant or variable for property'

        mdl.setPropertyMode('density', 'constant')
        doc2 = '''<property choice="constant" label="Density" name="density">
                    <initial_value>1.17862</initial_value>
                 </property>'''
        assert mdl.node_density == self.xmlNodeFromString(doc2),\
        'Could not set listing and recording status for property and remove this nodes'

##    def checkRemoveThermoConductNode(self):
##        """Check whether node thermal conductivity could be removed"""
##        mdl = FluidCharacteristicsModel(self.case)
##        mdl.setPropertyMode('density', 'variable')
##        mdl.setPropertyMode('molecular_viscosity', 'variable')
##        mdl.setPropertyMode('specific_heat', 'variable')
##        mdl.RemoveThermoConductNode()
##        doc = '''<fluid_properties>
##                    <property choice="variable" label="Density" name="density">
##                        <initial_value>1.17862</initial_value>
##                    </property>
##                    <property choice="variable" label="LamVisc" name="molecular_viscosity">
##                        <initial_value>1.83e-05</initial_value>
##                    </property>
##                    <property choice="variable" label="Sp. heat" name="specific_heat">
##                        <initial_value>1017.24</initial_value>
##                    </property>
##                 </fluid_properties>'''
##        assert mdl.node_fluid == self.xmlNodeFromString(doc),\
##        'Could not remove thermal_conductivity node'


def suite():
    testSuite = unittest.makeSuite(FluidCharacteristicsModelTestCase, "check")
    return testSuite


def runTest():
    print(__file__)
    runner = unittest.TextTestRunner()
    runner.run(suite())


#-------------------------------------------------------------------------------
# End
#-------------------------------------------------------------------------------