require ADIWG::Mdtranslator::Readers::SbJson.readerModule('module_responsibleParty')
require ADIWG::Mdtranslator::Readers::SbJson.readerModule('module_dateTime')
# require ADIWG::Mdtranslator::Readers::SbJson.readerModule('module_resourceMaintenance')
# require ADIWG::Mdtranslator::Readers::SbJson.readerModule('module_metadataExtension')
# require ADIWG::Mdtranslator::Readers::SbJson.readerModule('module_resourceIdentifier')
# require ADIWG::Mdtranslator::Readers::SbJson.readerModule('module_citation')
# require ADIWG::Mdtranslator::Readers::SbJson.readerModule('module_locale')

module ADIWG
    module Mdtranslator
        module Readers
            module SbJson

                module MetadataInfo

                    def self.unpack(hMetadata, responseObj, intObj)

                        # return nil object if input is empty
                        intMetadataInfo = nil
                        return if hMetadata.empty?

                        # instance classes needed in script
                        intMetadataClass = InternalMetadata.new
                        intMetadataInfo = intMetadataClass.newMetadataInfo
                        hMetadataInfo = hMetadata

                        # metadata - metadata identifier
                        if hMetadataInfo.has_key?('id')
                            hMetadataId = hMetadataInfo['id']
                            unless hMetadataId.empty?
                                rId = intMetadataClass.newResourceId
                                rId[:identifier] = hMetadataId
                                rId[:identifierType] = 'uuid'
                                rId[:identifierNamespace] = 'gov.sciencebase.catalog'
                                rId[:identifierDescription] = 'The unique ScienceBase id of the resource.'
                                intMetadataInfo[:metadataId] = rId
                            end
                        end

                        # metadata - parent metadata identifier
                        if hMetadataInfo.has_key?('parentId')
                            hParentId = hMetadataInfo['parentId']
                            hParent = intMetadataClass.newCitation
                            hParent[:citTitle] = 'Parent Metadata identifier'
                            pId = intMetadataClass.newResourceId
                            pId[:identifier] = hParentId
                            pId[:identifierType] = 'uuid'
                            pId[:identifierNamespace] = 'gov.sciencebase.catalog'
                            pId[:identifierDescription] = 'The unique ScienceBase id of the parent resource.'
                            hParent[:citResourceIds] << pId
                            pParty = intMetadataClass.newRespParty
                            pParty[:contactId] = 'SB'
                            pParty[:roleName] = 'originator'
                            hParent[:citResponsibleParty] << pParty

                            unless hParent.empty?
                                intMetadataInfo[:parentMetadata] = hParent
                            end
                        end

                        # metadata - metadata contacts, custodians
                        # We're just injecting the first sbJSON contact here
                        firstCont = intObj[:contacts][0]
                        aCust = {}
                        aCust['contactId'] = firstCont[:contactId]
                        aCust['role'] = firstCont[:sbType]
                        intMetadataInfo[:metadataCustodians] << ResponsibleParty.unpack(aCust, responseObj)

                        # metadata - creation date
                        if hMetadataInfo.has_key?('provenance')
                            s = hMetadataInfo['provenance']['dateCreated']
                            if s != ''
                                hDateTime = DateTime.unpack(s, responseObj)
                                hDateTime[:dateType] = 'creation'
                                intMetadataInfo[:metadataCreateDate] = hDateTime
                            end
                        end

                        # metadata - date of last metadata update
                        if hMetadataInfo.has_key?('provenance')
                            s = hMetadataInfo['provenance']['lastUpdated']
                            if s != ''
                                hDateTime = DateTime.unpack(s, responseObj)
                                hDateTime[:dateType] = 'lastUpdate'
                                intMetadataInfo[:metadataUpdateDate] = hDateTime
                            end
                        end

                        # metadata - characterSet - default 'utf8'
                        intMetadataInfo[:metadataCharacterSet] = 'utf8'

                        # metadata - locale
                        intLocale = intMetadataClass.newLocale
                        intLocale[:languageCode] = 'eng'
                        intLocale[:countryCode] = 'USA'
                        intLocale[:characterEncoding] = 'UTF-8'
                        intMetadataInfo[:metadataLocales] << intLocale


                        # metadata - metadata URI
                        intMetadataInfo[:metadataURI] = 'https://www.sciencebase.gov/catalog/item/' + hMetadataInfo['id']

                        # metadata - status
                        # if hMetadataInfo.has_key?('metadataStatus')
                        #     s = hMetadataInfo['metadataStatus']
                        #     if s != ''
                        #         intMetadataInfo[:metadataStatus] = s
                        #     end
                        # end

                        # metadata - metadata maintenance info
                        intResMaint = intMetadataClass.newResourceMaint

                        # resource maintenance - frequency code
                        intResMaint[:maintFreq] = 'asNeeded'

                        # resource maintenance - contact
                        intResMaint[:maintContacts] << intMetadataInfo[:metadataCustodians][0]

                        intMetadataInfo[:maintInfo] = intResMaint

                        return intMetadataInfo

                    end

                end

            end
        end
    end
end