package openxc;

option java_package = "com.openxc";
option java_outer_classname = "BinaryMessages";

message VehicleMessage {
    enum Type { CAN = 1; SIMPLE = 2; DIAGNOSTIC = 3; CONTROL_COMMAND = 4;
            COMMAND_RESPONSE = 5; }

    optional Type type = 1;
    optional CanMessage can_message = 2;
    optional SimpleMessage simple_message = 3;
    optional DiagnosticResponse diagnostic_response = 4;
    optional ControlCommand control_command = 5;
    optional CommandResponse command_response = 6;
}

message CanMessage {
    enum FrameFormat {
        STANDARD = 1;
        EXTENDED = 2;
    }
    optional int32 bus = 1;
    optional uint32 id = 2;
    optional bytes data = 3;
    optional FrameFormat frame_format = 4;
}

message ControlCommand {
    enum Type {
        VERSION = 1;
        DEVICE_ID = 2;
        DIAGNOSTIC = 3;
        PASSTHROUGH = 4;
        ACCEPTANCE_FILTER_BYPASS = 5;
        PAYLOAD_FORMAT = 6;
        PREDEFINED_OBD2_REQUESTS = 7;
    }

    optional Type type = 1;
    optional DiagnosticControlCommand diagnostic_request = 2;
    optional PassthroughModeControlCommand passthrough_mode_request = 3;
    optional AcceptanceFilterBypassCommand acceptance_filter_bypass_command = 4;
    optional PayloadFormatCommand payload_format_command = 5;
    optional PredefinedObd2RequestsCommand predefined_obd2_requests_command = 6;
}

message DiagnosticControlCommand {
    enum Action { ADD = 1; CANCEL = 2; }

    optional DiagnosticRequest request = 1;
    optional Action action = 2;
}

message PassthroughModeControlCommand {
    optional int32 bus = 1;
    optional bool enabled = 2;
}

message AcceptanceFilterBypassCommand {
    optional int32 bus = 1;
    optional bool bypass = 2;
}

message PayloadFormatCommand {
    enum PayloadFormat {
        JSON = 1;
        PROTOBUF = 2;
    }

    optional PayloadFormat format = 1;
}

message PredefinedObd2RequestsCommand {
    optional bool enabled = 1;
}

message CommandResponse {
    optional ControlCommand.Type type = 1;
    optional string message = 2;
    optional bool status = 3;
}

message DiagnosticRequest {
    enum DecodedType { NONE = 1; OBD2 = 2; }

    optional int32 bus = 1;
    optional uint32 message_id = 2;
    optional uint32 mode = 3;
    optional uint32 pid = 4;
    // TODO we are capping this at 8 bytes for now - need to change when we
    // support multi-frame responses
    optional bytes payload = 5;
    optional bool multiple_responses = 6;
    optional double frequency = 7;
    optional string name = 8;
    optional DecodedType decoded_type = 9;
}

message DiagnosticResponse {
    optional int32 bus = 1;
    optional uint32 message_id = 2;
    optional uint32 mode = 3;
    optional uint32 pid = 4;
    optional bool success = 5;
    optional uint32 negative_response_code = 6;
    // TODO we are capping this at 8 bytes for now - need to change when we
    // support multi-frame responses
    optional bytes payload = 7;
    optional double value = 8;
}

message DynamicField {
    enum Type { STRING = 1; NUM = 2; BOOL = 3; }

    optional Type type = 1;
    optional string string_value = 2;
    optional double numeric_value = 3;
    optional bool boolean_value = 4;
}

message SimpleMessage {
    optional string name = 1;
    optional DynamicField value = 2;
    optional DynamicField event = 3;
}

// TODO we should also consider having an enum type, having each specific
// message defined as a protobuf