# unpack image description
# Reader - ADIwg JSON to internal data structure

# History:
# 	Stan Smith 2016-10-18 original script

require_relative 'module_identifier'

module ADIWG
    module Mdtranslator
        module Readers
            module MdJson

                module ImageDescription

                    def self.unpack(hImageInfo, responseObj)

                        # return nil object if input is empty
                        if hImageInfo.empty?
                            responseObj[:readerExecutionMessages] << 'Image Description object is empty'
                            responseObj[:readerExecutionPass] = false
                            return nil
                        end

                        # instance classes needed in script
                        intMetadataClass = InternalMetadata.new
                        hImage = intMetadataClass.newImageDescription

                        # image description - elevation angle of illumination
                        if hImageInfo.has_key?('illuminationElevationAngle')
                            if hImageInfo['illuminationElevationAngle'] != ''
                                hImage[:illuminationElevationAngle] = hImageInfo['illuminationElevationAngle']
                            end
                        end

                        # image description - azimuth of illumination
                        if hImageInfo.has_key?('illuminationAzimuthAngle')
                            if hImageInfo['illuminationAzimuthAngle'] != ''
                                hImage[:illuminationAzimuthAngle] = hImageInfo['illuminationAzimuthAngle']
                            end
                        end

                        # image description - image condition
                        if hImageInfo.has_key?('imagingCondition')
                            if hImageInfo['imagingCondition'] != ''
                                hImage[:imagingCondition] = hImageInfo['imagingCondition']
                            end
                        end

                        # image description - image quality - identifier
                        if hImageInfo.has_key?('imageQualityCode')
                            hObject = hImageInfo['imageQualityCode']
                            unless hObject.empty?
                                hReturn = Identifier.unpack(hObject, responseObj)
                                unless hReturn.nil?
                                    hImage[:imageQualityCode] = hReturn
                                end
                            end
                        end


                        # image description - cloud cover percentage
                        if hImageInfo.has_key?('cloudCoverPercent')
                            if hImageInfo['cloudCoverPercent'] != ''
                                hImage[:cloudCoverPercent] = hImageInfo['cloudCoverPercent']
                            end
                        end

                        # image description - compression quality
                        if hImageInfo.has_key?('compressionQuantity')
                            if hImageInfo['compressionQuantity'] != ''
                                hImage[:compressionQuantity] = hImageInfo['compressionQuantity']
                            end
                        end

                        # image description - triangulation information available {Boolean}
                        if hImageInfo.has_key?('triangulationIndicator')
                            if hImageInfo['triangulationIndicator'] === true
                                hImage[:triangulationIndicator] = hImageInfo['triangulationIndicator']
                            end
                        end

                        # image description - radiometric calibration information available {Boolean}
                        if hImageInfo.has_key?('radiometricCalibrationAvailable')
                            if hImageInfo['radiometricCalibrationAvailable'] === true
                                hImage[:radiometricCalibrationAvailable] = hImageInfo['radiometricCalibrationAvailable']
                            end
                        end

                        # image description - camera calibration information available {Boolean}
                        if hImageInfo.has_key?('cameraCalibrationAvailable')
                            if hImageInfo['cameraCalibrationAvailable'] === true
                                hImage[:cameraCalibrationAvailable] = hImageInfo['cameraCalibrationAvailable']
                            end
                        end

                        # image description - film distortion information available {Boolean}
                        if hImageInfo.has_key?('filmDistortionAvailable')
                            if hImageInfo['filmDistortionAvailable'] === true
                                hImage[:filmDistortionAvailable] = hImageInfo['filmDistortionAvailable']
                            end
                        end

                        # image description - lens distortion information available {Boolean}
                        if hImageInfo.has_key?('lensDistortionAvailable')
                            if hImageInfo['lensDistortionAvailable'] === true
                                hImage[:lensDistortionAvailable] = hImageInfo['lensDistortionAvailable']
                            end
                        end

                        return hImage

                    end

                end

            end
        end
    end
end