import Foundation
#if os(macOS)
    import PostboxMac
#else
    import Postbox
#endif

public class SourceReferenceMessageAttribute: MessageAttribute {
    public let messageId: MessageId
    public let associatedMessageIds: [MessageId] = []
    public let associatedPeerIds: [PeerId]
    
    public init(messageId: MessageId) {
        self.messageId = messageId
        self.associatedPeerIds = [messageId.peerId]
    }
    
    required public init(decoder: PostboxDecoder) {
        let namespaceAndId: Int64 = decoder.decodeInt64ForKey("i", orElse: 0)
        self.messageId = MessageId(peerId: PeerId(decoder.decodeInt64ForKey("p", orElse: 0)), namespace: Int32(namespaceAndId & 0xffffffff), id: Int32((namespaceAndId >> 32) & 0xffffffff))
        self.associatedPeerIds = [self.messageId.peerId]
    }
    
    public func encode(_ encoder: PostboxEncoder) {
        let namespaceAndId = Int64(self.messageId.namespace) | (Int64(self.messageId.id) << 32)
        encoder.encodeInt64(namespaceAndId, forKey: "i")
        encoder.encodeInt64(self.messageId.peerId.toInt64(), forKey: "p")
    }
}