#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Copyright 2015 California Institute of Technology. ALL RIGHTS RESERVED.
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
# http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# 
# United States Government Sponsorship acknowledged. This software is subject to
# U.S. export control laws and regulations and has been classified as 'EAR99 NLR'
# (No [Export] License Required except when exporting to an embargoed country,
# end user, or in support of a prohibited end use). By downloading this software,
# the user agrees to comply with all applicable U.S. export laws and regulations.
# The user has the responsibility to obtain export licenses, or other export
# authority as may be required before exporting this software to any 'EAR99'
# embargoed foreign country or citizen of those countries.
#
# Author: Piyush Agram
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~




def createGRDProduct():
    from .GRDProduct import GRDProduct
    return GRDProduct()

def createSentinel1(name=None):
    from .Sentinel1 import Sentinel1
    return Sentinel1()

def createRadarsat2(name=None):
    from .Radarsat2 import Radarsat2
    return Radarsat2()

def createTerrasarx(name=None):
    from .Terrasarx import Terrasarx
    return Terrasarx()


SENSORS = {
             'SENTINEL1' : createSentinel1,
             'RADARSAT2' : createRadarsat2,
             'TERRASARX' : createTerrasarx
          }

def getFactoriesInfo():
    """
    Returns a dictionary with information on how to create an object Sensor from its factory
    """
    return  {'GRDSensor':
                     {'args':
                           {
                            'sensor':{'value':list(SENSORS.keys()),'type':'str','optional':False}
                            },
                     'factory':'createSensor'
                     }
              }



def createSensor(sensor='', name=None):
    try:
        cls = SENSORS[str(sensor).upper()]
        try:
            instance = cls(name)
        except AttributeError:
            raise TypeError("'sensor name'=%s  cannot be interpreted" %
                            str(sensor))
        pass
    except:
        print("Sensor type not recognized. Valid Sensor types:\n",
              SENSORS.keys())
        instance = None
        pass
    return instance