################################################################################
#This software was developed by the University of Tennessee as part of the
#Distributed Data Analysis of Neutron Scattering Experiments (DANSE)
#project funded by the US National Science Foundation. 
#
#See the license text in license.txt
#
#copyright 2010, University of Tennessee
################################################################################
"""
This module manages all data loaded into the application. Data_manager makes 
available all data loaded  for the current perspective. 

All modules "creating Data" posts their data to data_manager . 
Data_manager  make these new data available for all other perspectives.
"""

import logging
logging.basicConfig(level=logging.DEBUG,
                    format='%(asctime)s %(levelname)s %(message)s',
                    filename='sans_app.log',
                    filemode='w')    
  
class DataManager(object):
    """
    Manage a list of data
    """
    def __init__(self):
        """
        Store opened path and data object created at the loading time
        :param auto_plot: if True the datamanager sends data to plotting 
                            plugin. 
        :param auto_set_data: if True the datamanager sends to the current
        perspective
        """
        self._selected_data = []
        self.stored_data = {}
        self.message = ""
      
    def add_data(self, data_list):
        """
        receive a list of 
        """
        self._selected_data = []
        for data in data_list:
            if data.id  in self.stored_data:
                msg = "Data manager already stores %s" % str(data.name)
                msg += ""
                logging.info(msg)
            self._selected_data.append(data)
            self.stored_data[id] = data
            
    def set_auto_plot(self, flag=False):
        """
        When flag is true the data is plotted automatically
        """
        self._auto_set_data = flag
        
    def set_auto_set_data(self, flag=False):
        """
        When flag is true the data is send to the current perspective
        automatically
        """
        self._auto_set_data = flag
        
    def get_message(self):
        """
        return message
        """
        return self.message
    
    def get_by_id(self, id_list=None):
        """
        get a list of data given a list of id
        """
        self._selected_data = []
        for id in id_list:
            if id in self.stored_data:
                self._selected_data.append(self.stored_data[id])
        return self._selected_data
    
    def delete_by_id(self, id_list=None):
        """
        save data and path
        """
        for id in id_list:
            if id in self.stored_data:
                data = self.stored_data[id]
                if data in self._selected_data:
                    self._selected_data.remove(data)
                del self.stored_data[id]
    
    def get_by_name(self, name_list=None):
        """
        return a list of data given a list of data names
        """
        self._selected_data = []
        for selected_name in name_list:
            for data in self.stored_data.values():
                if data.name == selected_name:
                    self._selected_data.append(data)
        return self._selected_data
    
    def delete_by_name(self, name_list=None):
        """
        save data and path
        """
        for selected_name in name_list:
            for data in self.stored_data.values():
                if data.name == selected_name:
                    if data in self._selected_data:
                        self._selected_data.remove(data)
                    if data.id in self.stored_data:
                        del self.stored_data[data.id]

    def get_selected_data(self):
        """
        Send list of selected data
        """
        return self._selected_data
    
    def get_all_data(self):
        """
        return list of all available data
        """
        return self.stored_data.values()