#TODO: add comments to document this module
#TODO: clean-up the exception handling.

#TODO: clean-up the FractalAbsModel and PowerLawAbsModel menu items. Those
#      model definitions do not belong here. They belong with the rest of the
#      models.

import wx
import wx.lib.newevent
import imp
import os,sys,math
import os.path

(ModelEvent, EVT_MODEL) = wx.lib.newevent.NewEvent()
from sans.guicomm.events import StatusEvent  
# Time is needed by the log method
import time

# Explicitly import from the pluginmodel module so that py2exe
# places it in the distribution. The Model1DPlugin class is used
# as the base class of plug-in models.
from sans.models.pluginmodel import Model1DPlugin
    
def log(message):
    out = open("plugins.log", 'a')
    out.write("%10g:  %s\n" % (time.clock(), message))
    out.close()

def findModels():
    log("looking for models in: %s/plugins" % os.getcwd())
    if os.path.isdir('plugins'):
        return _findModels('plugins')
    return []
    
def _check_plugin(model, name):
    """
        Do some checking before model adding plugins in the list
        @param model: class model to add into the plugin list
        @param name:name of the module plugin
        @return model: model if valid model or None if not valid
    """
    #Check is the plugin is of type Model1DPlugin
    if not issubclass(model, Model1DPlugin):
        msg= "Plugin %s must be of type Model1DPlugin \n"%str(name)
        log(msg)
        return None
    if model.__name__!="Model":
        msg= "Plugin %s class name must be Model \n"%str(name)
        log(msg)
        return None
    try:
        new_instance= model()
    except:
        msg="Plugin %s error in __init__ \n\t: %s %s\n"%(str(name),
                                    str(sys.exc_type),sys.exc_value)
        log(msg)
        return None
   
    new_instance= model() 
    if hasattr(new_instance,"function"):
        try:
           value=new_instance.function()
        except:
           msg="Plugin %s: error writing function \n\t :%s %s\n "%(str(name),
                                    str(sys.exc_type),sys.exc_value)
           log(msg)
           return None
    else:
       msg="Plugin  %s needs a method called function \n"%str(name)
       log(msg)
       return None
    return model
  
  
def _findModels(dir):
    # List of plugin objects
    plugins = []
    # Go through files in plug-in directory
    try:
        list = os.listdir(dir)
        for item in list:
            toks = os.path.splitext(os.path.basename(item))
            if toks[1]=='.py' and not toks[0]=='__init__':
                name = toks[0]
            
                path = [os.path.abspath(dir)]
                file = None
                try:
                    (file, path, info) = imp.find_module(name, path)
                    module = imp.load_module( name, file, item, info )
                    if hasattr(module, "Model"):
                        try:
                            if _check_plugin(module.Model, name)!=None:
                                plugins.append(module.Model)
                        except:
                            msg="Error accessing Model"
                            msg+="in %s\n  %s %s\n" % (name,
                                    str(sys.exc_type), sys.exc_value)
                            log(msg)
                except:
                    msg="Error accessing Model"
                    msg +=" in %s\n  %s %s \n" %(name,
                                    str(sys.exc_type), sys.exc_value)
                    log(msg)
                finally:
              
                    if not file==None:
                        file.close()
    except:
        # Don't deal with bad plug-in imports. Just skip.
        pass
    return plugins

class ModelList(object):
    """
        Contains dictionary of model and their type
    """
    def __init__(self):
        self.mydict={}
        
    def set_list(self, name, mylist):
        """
            @param name: the type of the list
            @param mylist: the list to add
        """
        if name not in self.mydict.keys():
            self.mydict[name] = mylist
            
            
    def get_list(self):
        """
         return all the list stored in a dictionary object
        """
        return self.mydict
        
class ModelManager:
    ## external dict for models
    model_combobox = ModelList()
    ## Dictionary of form models
    form_factor_dict = {}
    ## dictionary of other
    struct_factor_dict = {}
    ##list of form factors
    shape_list =[]
    ## independent shape model list
    shape_indep_list = []
    ##list of structure factors 
    struct_list= []
    ##list of model allowing multiplication
    multiplication_factor=[]
    ## list of added models
    plugins=[]
    ## Event owner (guiframe)
    event_owner = None
    
    def _getModelList(self):
        """
            List of models we want to make available by default
            for this application
        
            @return: the next free event ID following the new menu events
        """
        ## form factor
        from sans.models.SphereModel import SphereModel
        self.shape_list.append(SphereModel)
        self.multiplication_factor.append(SphereModel)
        
        from sans.models.CoreShellModel import CoreShellModel
        self.shape_list.append(CoreShellModel)
        self.multiplication_factor.append(CoreShellModel)
        
        from sans.models.VesicleModel import VesicleModel
        self.shape_list.append(VesicleModel)
        self.multiplication_factor.append(VesicleModel)
        
        from sans.models.MultiShellModel import MultiShellModel
        self.shape_list.append(MultiShellModel)
        self.multiplication_factor.append(MultiShellModel)
        
        from sans.models.BinaryHSModel import BinaryHSModel
        self.shape_list.append(BinaryHSModel)
        
        from sans.models.CylinderModel import CylinderModel
        self.shape_list.append(CylinderModel)
        self.multiplication_factor.append(CylinderModel)
        
        from sans.models.CoreShellCylinderModel import CoreShellCylinderModel
        self.shape_list.append(CoreShellCylinderModel)
        self.multiplication_factor.append(CoreShellCylinderModel)
        
        from sans.models.HollowCylinderModel import HollowCylinderModel
        self.shape_list.append(HollowCylinderModel)
        self.multiplication_factor.append(HollowCylinderModel)
              
        from sans.models.FlexibleCylinderModel import FlexibleCylinderModel
        self.shape_list.append(FlexibleCylinderModel)

        
        from sans.models.StackedDisksModel import StackedDisksModel
        self.shape_list.append(StackedDisksModel)
        self.multiplication_factor.append(StackedDisksModel)
        
        from sans.models.ParallelepipedModel import ParallelepipedModel
        self.shape_list.append(ParallelepipedModel)
        self.multiplication_factor.append(ParallelepipedModel)
        
        from sans.models.EllipticalCylinderModel import EllipticalCylinderModel
        self.shape_list.append(EllipticalCylinderModel)
        self.multiplication_factor.append(EllipticalCylinderModel)
                
        from sans.models.EllipsoidModel import EllipsoidModel
        self.shape_list.append(EllipsoidModel)
        self.multiplication_factor.append(EllipsoidModel)
      
        from sans.models.CoreShellEllipsoidModel import CoreShellEllipsoidModel
        self.shape_list.append(CoreShellEllipsoidModel)
        self.multiplication_factor.append(CoreShellEllipsoidModel)
         
        from sans.models.TriaxialEllipsoidModel import TriaxialEllipsoidModel
        self.shape_list.append(TriaxialEllipsoidModel)
        self.multiplication_factor.append(TriaxialEllipsoidModel)
        
        from sans.models.LamellarModel import LamellarModel
        self.shape_list.append(LamellarModel)
        
        from sans.models.LamellarFFHGModel import LamellarFFHGModel
        self.shape_list.append(LamellarFFHGModel)
        
        from sans.models.LamellarPSModel import LamellarPSModel
        self.shape_list.append(LamellarPSModel)
     
        from sans.models.LamellarPSHGModel import LamellarPSHGModel
        self.shape_list.append(LamellarPSHGModel)
      
        ## Structure factor 
        from sans.models.SquareWellStructure import SquareWellStructure
        self.struct_list.append(SquareWellStructure)
        
        from sans.models.HardsphereStructure import HardsphereStructure
        self.struct_list.append(HardsphereStructure)
         
        from sans.models.StickyHSStructure import StickyHSStructure
        self.struct_list.append(StickyHSStructure)
        
        from sans.models.HayterMSAStructure import HayterMSAStructure
        self.struct_list.append(HayterMSAStructure)
        
        
        ##shape-independent models
        from sans.models.BEPolyelectrolyte import BEPolyelectrolyte
        self.shape_indep_list.append(BEPolyelectrolyte )
        self.form_factor_dict[str(wx.NewId())] =  [SphereModel]
        from sans.models.DABModel import DABModel
        self.shape_indep_list.append(DABModel )
        
        from sans.models.GuinierModel import GuinierModel
        self.shape_indep_list.append(GuinierModel )
        
        from sans.models.DebyeModel import DebyeModel
        self.shape_indep_list.append(DebyeModel )
        
        from sans.models.PorodModel import PorodModel
        self.shape_indep_list.append(PorodModel )
        
        from sans.models.PeakGaussModel import PeakGaussModel
        self.shape_indep_list.append(PeakGaussModel)
        
        from sans.models.PeakLorentzModel import PeakLorentzModel
        self.shape_indep_list.append(PeakLorentzModel)
        
        from sans.models.FractalAbsModel import FractalAbsModel
        self.shape_indep_list.append(FractalAbsModel)
        
        from sans.models.LorentzModel import LorentzModel
        self.shape_indep_list.append( LorentzModel) 
            
        from sans.models.PowerLawAbsModel import PowerLawAbsModel
        self.shape_indep_list.append( PowerLawAbsModel )
        
        from sans.models.TeubnerStreyModel import TeubnerStreyModel
        self.shape_indep_list.append(TeubnerStreyModel )
        
        from sans.models.LineModel import LineModel
        self.shape_indep_list.append(LineModel)
    
        #Looking for plugins
        self.plugins = findModels()
       
        return 0

  
    def get_model_list(self):    
        """ @ return dictionary of models for fitpanel use """
        self._getModelList()
        self.model_combobox.set_list("Shapes", self.shape_list)
        self.model_combobox.set_list("Shape-Independent", self.shape_indep_list)
        self.model_combobox.set_list("Structure Factors", self.struct_list)
        self.model_combobox.set_list("Customized Models", self.plugins)
        self.model_combobox.set_list("P(Q)*S(Q)", self.multiplication_factor)
        self.model_combobox.set_list("multiplication", self.multiplication_factor)
       
        return self.model_combobox