# Copyright (c) 2011-2014, HL7, Inc & The MITRE Corporation
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module FHIR
    class Provenance 
        
        include Mongoid::Document
        include Mongoid::History::Trackable
        include FHIR::Element
        include FHIR::Resource
        include FHIR::Formats::Utilities
        include FHIR::Serializer::Utilities
        extend FHIR::Deserializer::Provenance
        
        SEARCH_PARAMS = [
            '_id',
            'location',
            'start',
            'partytype',
            'target',
            '_language',
            'party',
            'end'
            ]
        # This is an ugly hack to deal with embedded structures in the spec agent
        class ProvenanceAgentComponent
        include Mongoid::Document
        include FHIR::Element
        include FHIR::Formats::Utilities
            embeds_one :role, class_name:'FHIR::Coding'
            validates_presence_of :role
            embeds_one :fhirType, class_name:'FHIR::Coding'
            validates_presence_of :fhirType
            field :reference, type: String
            validates_presence_of :reference
            field :display, type: String
        end
        
        # This is an ugly hack to deal with embedded structures in the spec entity
        class ProvenanceEntityComponent
        include Mongoid::Document
        include FHIR::Element
        include FHIR::Formats::Utilities
            
            VALID_CODES = {
                role: [ "derivation", "revision", "quotation", "source" ]
            }
            
            field :role, type: String
            validates :role, :inclusion => { in: VALID_CODES[:role] }
            validates_presence_of :role
            embeds_one :fhirType, class_name:'FHIR::Coding'
            validates_presence_of :fhirType
            field :reference, type: String
            validates_presence_of :reference
            field :display, type: String
            embeds_one :agent, class_name:'FHIR::Provenance::ProvenanceAgentComponent'
        end
        
        embeds_many :target, class_name:'FHIR::ResourceReference'
        validates_presence_of :target
        embeds_one :period, class_name:'FHIR::Period'
        field :recorded, type: DateTime
        validates_presence_of :recorded
        embeds_one :reason, class_name:'FHIR::CodeableConcept'
        embeds_one :location, class_name:'FHIR::ResourceReference'
        field :policy, type: Array # Array of Strings
        embeds_many :agent, class_name:'FHIR::Provenance::ProvenanceAgentComponent'
        embeds_many :entity, class_name:'FHIR::Provenance::ProvenanceEntityComponent'
        field :integritySignature, type: String
        track_history
    end
end
