#!/usr/bin/env python3 

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Copyright 2010 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: Giangi Sacco
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~





from __future__ import print_function
import sys
import os
import math
import logging
from iscesys.Compatibility import Compatibility
Compatibility.checkPythonVersion()

from .Image import Image

from iscesys.Component.Component import Component
##
# This class allows the creation of a DemImage object. The parameters that need to be set are
#\verbatim
#WIDTH: width of the image in units of the DATA_TYPE. Mandatory. 
#FILE_NAME: name of the file containing the image. Mandatory.
#DATA_TYPE: data  type used to store the image. The naming convention is the one adopted by numpy (see LineAccessor class). Optional. Default value 'BYTE'. 
#ACCESS_MODE: access mode of the file such as 'read', 'write' etc. See LineAccessor class for all possible values. Mandatory.
#FIRST_LATITUDE: first latitude of the DEM image.
#FIRST_LONGITUDE: first longitude of the DEM image.
#DELTA_LATITUDE: separation in latitude between two pixels.
#DELTA_LONGITUDE: separation in longitude between two pixels.
#SCHEME: the interleaving scheme adopted for the image. Could be BIL (band interleaved by line), BIP (band intereleaved by pixel) and BSQ (band sequential). Optional. BIP set by default.
#CASTER: define the type of caster. For example DoubleToFloat reads the image data as double but puts it into a buffer that is of float type. Optional. If not provided casting is not performed.
#\endverbatim
#Since the DemImage class inherits the Image.Image, the methods of initialization described in the Component package can be used.
#Moreover each parameter can be set with the corresponding accessor method setParameter() (see the class member methods).
#@see DataAccessor.Image.
#@see Component.Component.
REFERENCE = Component.Parameter('reference',
                            public_name='REFERENCE',
                            default='EGM96',
                            type=str,
                            mandatory=False,
                            doc='Geodetic datum')

DATA_TYPE = Component.Parameter('dataType',
                      public_name='DATA_TYPE',
                      default='short',
                      type=str,
                      mandatory=True,
                      doc='Image data type.')
IMAGE_TYPE = Component.Parameter('imageType',
                       public_name='IMAGE_TYPE',
                       default='dem',
                       type=str,
                       mandatory=False,
                       private=True,
                       doc='Image type used for displaying.')
     
class DemImage(Image):

    parameter_list = (
                  REFERENCE,
                  DATA_TYPE,
                  IMAGE_TYPE
                  ) 
    def createImage(self):
        
#        self.checkInitialization()
        Image.createImage(self)        

    def updateParameters(self):
        self.extendParameterList(Image,DemImage)
        super(DemImage,self).updateParameters()


    family = "demimage"
        
    def __init__(self,family='',name=''):
        self.updateParameters()
        super(DemImage, self).__init__(family if family else  self.__class__.family, name=name)
    
        self.initOptionalAndMandatoryLists()

        self.logger = logging.getLogger('isce.Image.DemImageBase')
        
        
        
        return
   
    def getsnwe(self):
        '''Return the bounding box.'''

        lats = [self.firstLatitude, self.firstLatitude + (self.length-1)*self.deltaLatitude]
        lons = [self.firstLongitude, self.firstLongitude + (self.width-1)*self.deltaLongitude]

        snwe = [min(lats), max(lats), min(lons), max(lons)]
        return snwe
    
    def __getstate__(self):
        d = dict(self.__dict__)
        del d['logger']
        return d
    def __setstate__(self,d):
        self.__dict__.update(d)
        self.logger = logging.getLogger('isce.Image.DemImageBase')
        return
    
#end class