// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

library fuchsia.bluetooth.bredr;

// A building element in SDP.  Used for various low-level and custom parameters.
enum DataElementType {
    NOTHING = 0;
    UNSIGNED_INTEGER = 1;
    SIGNED_INTEGER = 2;
    UUID = 3;
    STRING = 4;
    BOOLEAN = 5;
    SEQUENCE = 6;
    ALTERNATIVE = 7;
    // URL = 8;  // TODO(jamuraa): support URLs
};

union DataElementData {
    int64 integer;
    string? str;
    string? uuid;
    bool b;
    bytes? bytes;
    vector<DataElement?> sequence;
};

struct DataElement {
    DataElementType type;
    uint32 size; // Size in bytes, used for integer types.
    DataElementData data;
};

// Defined Protocol Identifiers for the Protocol Descriptor
// We intentionally omit deprecated profile identifiers.
// From Bluetooth Assigned Numbers:
// https://www.bluetooth.com/specifications/assigned-numbers/service-discovery
enum ProtocolIdentifier : uint16 {
    SDP = 1;
    RFCOMM = 3;
    ATT = 7;
    OBEX = 8;
    BNEP = 15;
    HIDP = 17;
    HardcopyControlChannel = 18;
    HardcopyDataChannel = 20;
    HardcopyNotification = 22;
    AVCTP = 23;
    AVDTP = 25;
    MCAPControlChannel = 30;
    MCAPDataChannel = 31;
    L2CAP = 256;
};

// Defined PSMs from the Bluetooth Assigned Numbers
// https://www.bluetooth.com/specifications/assigned-numbers/logical-link-control
// Used in DataElementData for protocol parameters for L2CAP.
const int64 kPSM_SDP = 1;
const int64 kPSM_RFCOMM = 3;
const int64 kPSM_TCSBIN = 5; // Telephony Control Specification
const int64 kPSM_TCSBINCordless = 7;
const int64 kPSM_BNEP = 15; // Bluetooth Network Encapsulation Protocol
const int64 kPSM_HIDControl = 17; // Human Interface Device
const int64 kPSM_HIDInterrupt = 19; // Human Interface Device
const int64 kPSM_AVCTP = 23; // Audio/Video Control Transport Protocol
const int64 kPSM_AVDTP = 25; // Audio/Video Distribution Transport Protocol
const int64 kPSM_AVCTP_Browse = 27; // Audio/Video Remote Control Profile (Browsing)
const int64 kPSM_ATT = 31; // ATT
const int64 kPSM_3DSP = 33; // 3D Synchronization Profile
const int64 kPSM_LE_IPSP = 35; // Internet Protocol Support Profile
const int64 kPSM_OTS = 37; // Object Transfer Service

// Identifies a communications protocol along with protocol-specific parameters.
struct ProtocolDescriptor {
    ProtocolIdentifier protocol;
    vector<DataElement> params;
};

// Identifiers that are valid for Bluetooth Classes / Profiles
// We intentionally omit classes and profile IDs that are unsupported, deprecated,
// or reserved for use by Fuchsia Bluetooth.
// From Bluetooth Assigned Numbers for SDP
// https://www.bluetooth.com/specifications/assigned-numbers/service-discovery
enum ServiceClassProfileIdentifier {
    // ServiceDiscoveryService and BrowseGroupDescriptorService used by Fuchsia
    SerialPort = 0x1101; // Serial Port Profile (SPP)
    DialupNetworking = 0x1103; // Dial-up Networking Profile (DUN)
    ObexObjectPush = 0x1105; // Object Push Profile (OPP)
    ObexFileTransfer = 0x1106; // File Transfer Profile (FTP)
    // Headset Profile (HSP)
    Headset = 0x1108;
    HeadsetAudioGateway = 0x1112;
    HeadsetHS = 0x1131;
    // Advanced Audio Distribution Profile (A2DP)
    AudioSource = 0x110A;
    AudioSink = 0x110B;
    AdvancedAudioDistribution = 0x110D;
    // Audio/Video Remote Control Profil (AVRCP)
    AVRemoteControlTarget = 0x110C;
    AVRemoteControl = 0x110E;
    AVRemoteControlController = 0x110F;
    // Personal Area Networking (PAN)
    PANU = 0x1115;
    NAP = 0x1116;
    GN = 0x1117;
    // Basic Printing and Basic Imaging Profiles omitted (unsupported)
    // Hands-Free Profile (HFP)
    Handsfree = 0x111E;
    HandsfreeAudioGateway = 0x111F;
    // Human Interface Device and Hardcopy Cable Replacement Profile omitted (unsupported)
    SIM_Access = 0x112D; // Sim Access Profile (SAP)
    // Phonebook Access Profile (PBAP)
    PhonebookPCE = 0x112E;
    PhonebookPSE = 0x112F;
    Phonebook = 0x1130;
    // Message Access Profile (MAP)
    MessageAccessServer = 0x1132;
    MessageNotificationServer = 0x1133;
    MessageAccessProfile = 0x1134;
    // GNSS and 3DSP omitted (unsupported)
    // Multi-Profile Specification (MPS)
    MPSProfile = 0x113A;
    MPSClass = 0x113B;
    // Calendar, Task, and Notes Profile omitted (unsupported)
    // Device ID used by Fuchsia
    // Video Distribution Profile (VDP)
    VideoSource = 0x1303;
    VideoSink = 0x1304;
    VideoDistribution = 0x1305;
    // Health Device Profile (HDP)
    HDP = 0x1400;
    HDPSource = 0x1401;
    HDPSink = 0x1402;
};

// A description of a profile that this service conforms to.
struct ProfileDescriptor {
    ServiceClassProfileIdentifier profile_id;
    uint8 major_version;
    uint8 minor_version;
};

// Human-readable information about a service. Strings are encoded in UTF-8.
struct Information {
    // Language that is represented.  Must be two characters long and a valid
    // ICO 639:1988 identifier.
    string language;

    // Service name
    string? name;

    // A human-readable description
    string? description;

    // The provider of this service (person or organization)
    string? provider;
};

// A generic attribute, used for protocol information;
struct Attribute {
    uint16 id;
    DataElement element;
};

// Universal attribute IDs.
// From the Bluetooth Specification, Version 5, Vol 3, Part B
const uint16 ATTR_SERVICE_RECORD_HANDLE = 0x0000;
const uint16 ATTR_SERVICE_CLASS_ID_LIST = 0x0001;
const uint16 ATTR_SERVICE_RECORD_STATE = 0x0002;
const uint16 ATTR_SERVICE_ID = 0x0003;
const uint16 ATTR_PROTOCOL_DESCRIPTOR_LIST = 0x0004;
const uint16 ATTR_ADDIITONAL_PROTOCOL_DESCRIPTOR_LIST = 0x000D;
const uint16 ATTR_BROWSE_GROUP_LIST = 0x0005;
const uint16 ATTR_LANGUAGE_BASE_ATTRIBUTE_ID_LIST = 0x0006;
const uint16 ATTR_SERVICE_INFO_TIME_TO_LIVE = 0x0007;
const uint16 ATTR_SERVICE_AVAILABILITY = 0x0008;
const uint16 ATTR_BLUETOOTH_PROFILE_DESCRIPTOR_LIST = 0x0009;

struct ServiceDefinition {
    // UUIDs of service classes that this service record conforms to.
    vector<string> service_class_uuids;

    // The protocols that can be used to gain access to this service, with their
    // protocol-specific identifiers.
    // This is ordered from lowest level to highest.
    vector<ProtocolDescriptor> protocol_descriptors;

    // Additional protocol descriptor lists, if the service requires more channels
    // in addition to the main service.
    vector<vector<ProtocolDescriptor>>? additional_protocol_descriptors;

    // Bluetooth profiles that are supported by this service.
    vector<ProfileDescriptor> profile_descriptors;

    // Human-readable service information, in one or more languages.
    // The first set of information is considered the primary language.
    vector<Information> information;

    // Additional attributes included in the Service Definition, for specific
    // services.
    // All of these attributes should have an Attribute ID above 0x0200.
    vector<Attribute>? additional_attributes;
};