syntax = "proto3";

package meshcore.v1;

option go_package = "github.com/corescope/proto/v1";

import "common.proto";
import "decoded.proto";

// ─── Core Data Types ───────────────────────────────────────────────────────────

// A transmission (deduplicated packet) as stored and returned by most endpoints.
// This is the "Packet Object" in the API spec.
message Transmission {
  // Transmission ID (auto-increment).
  int64 id = 1;
  // Raw hex-encoded packet bytes. Null if unavailable.
  optional string raw_hex = 2 [json_name = "raw_hex"];
  // Content hash — deduplication key.
  string hash = 3;
  // When this transmission was first observed (ISO 8601).
  string first_seen = 4 [json_name = "first_seen"];
  // Display timestamp, same as first_seen (ISO 8601).
  string timestamp = 5;
  // Route type: 0=DIRECT, 1=FLOOD, 2=reserved, 3=TRANSPORT.
  int32 route_type = 6 [json_name = "route_type"];
  // Payload type: 0=REQ .. 11=CONTROL.
  int32 payload_type = 7 [json_name = "payload_type"];
  // Payload format version.
  optional int32 payload_version = 8 [json_name = "payload_version"];
  // JSON-stringified decoded payload (for storage/transfer).
  optional string decoded_json = 9 [json_name = "decoded_json"];
  // Number of times this transmission was observed.
  int32 observation_count = 10 [json_name = "observation_count"];
  // Observer ID from "best" observation.
  optional string observer_id = 11 [json_name = "observer_id"];
  // Observer display name from "best" observation.
  optional string observer_name = 12 [json_name = "observer_name"];
  // Signal-to-noise ratio (dB) from best observation.
  optional double snr = 13;
  // Received signal strength (dBm) from best observation.
  optional double rssi = 14;
  // JSON-stringified hop array.
  optional string path_json = 15 [json_name = "path_json"];
  // Packet direction indicator.
  optional string direction = 16;
  // Observation quality score.
  optional double score = 17;
  // Per-observer observations. Stripped by default on list endpoints;
  // included when expand=observations or on detail endpoints.
  repeated Observation observations = 18;
}

// A single observation of a transmission by an observer.
message Observation {
  // Observation ID (auto-increment).
  int64 id = 1;
  // Parent transmission ID.
  int64 transmission_id = 2 [json_name = "transmission_id"];
  // Content hash (matches parent transmission).
  string hash = 3;
  // Observer device ID.
  optional string observer_id = 4 [json_name = "observer_id"];
  // Observer display name.
  optional string observer_name = 5 [json_name = "observer_name"];
  // Packet direction indicator.
  optional string direction = 6;
  // Signal-to-noise ratio (dB).
  optional double snr = 7;
  // Received signal strength (dBm).
  optional double rssi = 8;
  // Observation quality score.
  optional double score = 9;
  // JSON-stringified hop array.
  optional string path_json = 10 [json_name = "path_json"];
  // Observation timestamp (ISO 8601 or unix epoch).
  string timestamp = 11;
  // --- Enriched fields (denormalized from parent transmission) ---
  // Raw hex-encoded packet bytes.
  optional string raw_hex = 12 [json_name = "raw_hex"];
  // Payload type from parent transmission.
  int32 payload_type = 13 [json_name = "payload_type"];
  // JSON-stringified decoded payload from parent transmission.
  optional string decoded_json = 14 [json_name = "decoded_json"];
  // Route type from parent transmission.
  int32 route_type = 15 [json_name = "route_type"];
}

// ─── Grouped Packet ────────────────────────────────────────────────────────────

// Packet summary when grouped by hash (groupByHash=true).
// Different shape from Transmission — fields come from aggregate queries.
message GroupedPacket {
  // Content hash.
  string hash = 1;
  // When first observed (ISO 8601).
  string first_seen = 2 [json_name = "first_seen"];
  // Observation count for this hash.
  int32 count = 3;
  // Unique observers that saw this hash.
  int32 observer_count = 4 [json_name = "observer_count"];
  // Most recent observation timestamp (ISO 8601).
  string latest = 5;
  // Observer ID from latest observation.
  optional string observer_id = 6 [json_name = "observer_id"];
  // Observer name from latest observation.
  optional string observer_name = 7 [json_name = "observer_name"];
  // JSON-stringified hop array.
  optional string path_json = 8 [json_name = "path_json"];
  // Payload type number.
  int32 payload_type = 9 [json_name = "payload_type"];
  // Route type number.
  int32 route_type = 10 [json_name = "route_type"];
  // Raw hex-encoded packet bytes.
  string raw_hex = 11 [json_name = "raw_hex"];
  // JSON-stringified decoded payload.
  optional string decoded_json = 12 [json_name = "decoded_json"];
  // Observation count (same as count, backward compat).
  int32 observation_count = 13 [json_name = "observation_count"];
  // Best SNR across observations.
  optional double snr = 14;
  // Best RSSI across observations.
  optional double rssi = 15;
}

// ─── Byte Breakdown ────────────────────────────────────────────────────────────

// Single range in a packet byte-level breakdown.
message ByteRange {
  // Start byte offset.
  int32 start = 1;
  // End byte offset (exclusive).
  int32 end = 2;
  // Human-readable label for this range.
  string label = 3;
  // Hex representation of the bytes.
  string hex = 4;
  // Interpreted value (may be string, number, or absent).
  optional string value = 5;
  // CSS color for visual highlighting.
  string color = 6;
}

// Byte-level packet structure breakdown.
message PacketBreakdown {
  repeated ByteRange ranges = 1;
}

// ─── API Responses ─────────────────────────────────────────────────────────────

// GET /api/packets (default, non-grouped).
message PacketListResponse {
  repeated Transmission packets = 1;
  // Total matching count before pagination.
  int32 total = 2;
  int32 limit = 3;
  int32 offset = 4;
}

// GET /api/packets?groupByHash=true
message GroupedPacketListResponse {
  repeated GroupedPacket packets = 1;
  // Total unique hashes matching filters.
  int32 total = 2;
}

// GET /api/packets/timestamps — lightweight timestamp array for sparklines.
message PacketTimestampsResponse {
  // ISO 8601 timestamp strings.
  repeated string timestamps = 1;
}

// GET /api/packets/:id — single packet detail.
message PacketDetailResponse {
  // Full transmission object with observations populated.
  Transmission packet = 1;
  // Parsed path hops (from packet.paths or []).
  repeated string path = 2;
  // Byte-level packet structure (null if raw_hex unavailable).
  optional PacketBreakdown breakdown = 3;
  // Total observation count.
  int32 observation_count = 4 [json_name = "observation_count"];
  // All observations of this transmission.
  repeated Observation observations = 5;
}

// POST /api/packets — ingest a raw packet.
message PacketIngestRequest {
  // Raw hex-encoded packet (required).
  string hex = 1;
  // Observer device ID.
  optional string observer = 2;
  // Signal-to-noise ratio (dB).
  optional double snr = 3;
  // Received signal strength (dBm).
  optional double rssi = 4;
  // IATA region code.
  optional string region = 5;
  // Pre-computed content hash.
  optional string hash = 6;
}

// POST /api/packets — response.
message PacketIngestResponse {
  // Observation or transmission ID.
  int64 id = 1;
  // Full structured decode result.
  DecodedResult decoded = 2;
}

// POST /api/decode — decode without storing.
message DecodeRequest {
  // Raw hex-encoded packet (required).
  string hex = 1;
}

// POST /api/decode — response.
message DecodeResponse {
  DecodedResult decoded = 1;
}

// ─── Traces ────────────────────────────────────────────────────────────────────

// Single trace entry — one observer's sighting of a hash.
message TraceEntry {
  // Observer device ID.
  optional string observer = 1;
  // Observer display name.
  optional string observer_name = 2 [json_name = "observer_name"];
  // Observation timestamp (ISO 8601).
  string time = 3;
  // Signal-to-noise ratio (dB).
  optional double snr = 4;
  // Received signal strength (dBm).
  optional double rssi = 5;
  // JSON-stringified hop array.
  optional string path_json = 6 [json_name = "path_json"];
}

// GET /api/traces/:hash — all observations of a packet hash.
message TraceResponse {
  repeated TraceEntry traces = 1;
}

// ─── Audio Lab ─────────────────────────────────────────────────────────────────

// Single packet in an audio-lab bucket.
message AudioLabPacket {
  // Content hash.
  string hash = 1;
  // Raw hex-encoded packet bytes.
  string raw_hex = 2 [json_name = "raw_hex"];
  // JSON-stringified decoded payload.
  optional string decoded_json = 3 [json_name = "decoded_json"];
  // Observation count.
  int32 observation_count = 4 [json_name = "observation_count"];
  // Payload type number.
  int32 payload_type = 5 [json_name = "payload_type"];
  // JSON-stringified hop array.
  optional string path_json = 6 [json_name = "path_json"];
  // Observer device ID.
  optional string observer_id = 7 [json_name = "observer_id"];
  // Observation timestamp (ISO 8601).
  string timestamp = 8;
}

// Wrapper for a list of packets in one audio-lab bucket.
message AudioLabBucket {
  repeated AudioLabPacket packets = 1;
}

// GET /api/audio-lab/buckets — packets bucketed by payload type name.
message AudioLabBucketsResponse {
  // Keyed by payload type name (e.g. "ADVERT", "GRP_TXT").
  map<string, AudioLabBucket> buckets = 1;
}