syntax = "proto3";

package meshcore.v1;

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

import "common.proto";

// ═══════════════════════════════════════════════════════════════════════════════
// GET /api/analytics/rf — RF signal analytics
// ═══════════════════════════════════════════════════════════════════════════════

// Payload type with signal stats.
message PayloadTypeSignal {
  // Payload type name (e.g. "ADVERT", "GRP_TXT").
  string name = 1;
  // Packet count for this type.
  int32 count = 2;
  // Average SNR.
  double avg = 3;
  // Minimum SNR.
  double min = 4;
  // Maximum SNR.
  double max = 5;
}

// Hourly signal trend data point.
message SignalOverTimeEntry {
  // Hour label (e.g. "2025-07-17T04").
  string hour = 1;
  // Packet count in this hour.
  int32 count = 2;
  // Average SNR in this hour.
  double avg_snr = 3 [json_name = "avgSnr"];
}

// SNR vs RSSI scatter data point.
message ScatterPoint {
  double snr = 1;
  double rssi = 2;
}

// Payload type name + count entry.
message PayloadTypeEntry {
  // Payload type number (null when unknown).
  optional int32 type = 1;
  // Human-readable type name.
  string name = 2;
  // Observation count.
  int32 count = 3;
}

// Hourly packet count entry.
message HourlyCount {
  // Hour label (e.g. "2025-07-17T04").
  string hour = 1;
  // Packet count.
  int32 count = 2;
}

// GET /api/analytics/rf — response.
message RFAnalyticsResponse {
  // Observations with SNR data.
  int32 total_packets = 1 [json_name = "totalPackets"];
  // All regional observations.
  int32 total_all_packets = 2 [json_name = "totalAllPackets"];
  // Unique transmission hashes.
  int32 total_transmissions = 3 [json_name = "totalTransmissions"];
  // SNR aggregate statistics.
  SignalStats snr = 4;
  // RSSI aggregate statistics.
  SignalStats rssi = 5;
  // SNR distribution histogram (20 bins).
  Histogram snr_values = 6 [json_name = "snrValues"];
  // RSSI distribution histogram (20 bins).
  Histogram rssi_values = 7 [json_name = "rssiValues"];
  // Packet size distribution histogram (25 bins).
  Histogram packet_sizes = 8 [json_name = "packetSizes"];
  // Minimum packet size in bytes.
  int32 min_packet_size = 9 [json_name = "minPacketSize"];
  // Maximum packet size in bytes.
  int32 max_packet_size = 10 [json_name = "maxPacketSize"];
  // Average packet size in bytes.
  double avg_packet_size = 11 [json_name = "avgPacketSize"];
  // Hourly packet counts.
  repeated HourlyCount packets_per_hour = 12 [json_name = "packetsPerHour"];
  // Breakdown by payload type.
  repeated PayloadTypeEntry payload_types = 13 [json_name = "payloadTypes"];
  // SNR stats per payload type.
  repeated PayloadTypeSignal snr_by_type = 14 [json_name = "snrByType"];
  // Signal quality over time.
  repeated SignalOverTimeEntry signal_over_time = 15 [json_name = "signalOverTime"];
  // SNR vs RSSI scatter data (max 500 points).
  repeated ScatterPoint scatter_data = 16 [json_name = "scatterData"];
  // Time span covered by the data in hours.
  double time_span_hours = 17 [json_name = "timeSpanHours"];
}

// ═══════════════════════════════════════════════════════════════════════════════
// GET /api/analytics/topology — Network topology analytics
// ═══════════════════════════════════════════════════════════════════════════════

// Hop count distribution entry.
message TopologyHopDist {
  // Hop count.
  int32 hops = 1;
  // Number of packets at this distance.
  int32 count = 2;
}

// Repeater ranked by relay frequency.
message TopRepeater {
  // Raw hex hop prefix.
  string hop = 1;
  // Times this node appeared as a relay.
  int32 count = 2;
  // Resolved node name (null if unresolved).
  optional string name = 3;
  // Resolved public key (null if unresolved).
  optional string pubkey = 4;
}

// Frequently co-occurring relay pair.
message TopPair {
  // First hop in the pair.
  string hop_a = 1 [json_name = "hopA"];
  // Second hop in the pair.
  string hop_b = 2 [json_name = "hopB"];
  // Co-occurrence count.
  int32 count = 3;
  // Resolved names and keys.
  optional string name_a = 4 [json_name = "nameA"];
  optional string name_b = 5 [json_name = "nameB"];
  optional string pubkey_a = 6 [json_name = "pubkeyA"];
  optional string pubkey_b = 7 [json_name = "pubkeyB"];
}

// Hop count vs average SNR data point.
message HopsVsSnr {
  int32 hops = 1;
  int32 count = 2;
  double avg_snr = 3 [json_name = "avgSnr"];
}

// Lightweight observer reference (id + name).
message ObserverRef {
  string id = 1;
  string name = 2;
}

// Node in an observer's reach ring.
message ReachNode {
  // Raw hex hop prefix.
  string hop = 1;
  // Resolved name (null if unresolved).
  optional string name = 2;
  // Resolved public key.
  optional string pubkey = 3;
  // Times seen at this distance.
  int32 count = 4;
  // Distance range label (e.g. "1-3", null if constant).
  optional string dist_range = 5 [json_name = "distRange"];
}

// Ring of nodes at a given hop distance from an observer.
message ReachRing {
  // Hop distance from observer.
  int32 hops = 1;
  // Nodes at this distance.
  repeated ReachNode nodes = 2;
}

// Observer reach data (rings of nodes by hop distance).
message ObserverReach {
  // Observer display name.
  string observer_name = 1 [json_name = "observer_name"];
  // Concentric rings by hop distance.
  repeated ReachRing rings = 2;
}

// Observer entry in a multi-observer node.
message MultiObsObserver {
  string observer_id = 1 [json_name = "observer_id"];
  string observer_name = 2 [json_name = "observer_name"];
  // Minimum hop distance from this observer.
  int32 min_dist = 3 [json_name = "minDist"];
  // Times seen by this observer.
  int32 count = 4;
}

// Node seen by multiple observers.
message MultiObsNode {
  // Raw hex hop prefix.
  string hop = 1;
  // Resolved name.
  optional string name = 2;
  // Resolved public key.
  optional string pubkey = 3;
  // Observers that see this node.
  repeated MultiObsObserver observers = 4;
}

// Best path entry for a node across observers.
message BestPathEntry {
  // Raw hex hop prefix.
  string hop = 1;
  // Resolved name.
  optional string name = 2;
  // Resolved public key.
  optional string pubkey = 3;
  // Minimum hop distance across all observations.
  int32 min_dist = 4 [json_name = "minDist"];
  // Best observer ID.
  string observer_id = 5 [json_name = "observer_id"];
  // Best observer name.
  string observer_name = 6 [json_name = "observer_name"];
}

// GET /api/analytics/topology — response.
message TopologyResponse {
  // Number of unique nodes observed.
  int32 unique_nodes = 1 [json_name = "uniqueNodes"];
  // Average hop count.
  double avg_hops = 2 [json_name = "avgHops"];
  // Median hop count.
  double median_hops = 3 [json_name = "medianHops"];
  // Maximum hop count observed.
  int32 max_hops = 4 [json_name = "maxHops"];
  // Distribution of packets by hop count (capped at 25).
  repeated TopologyHopDist hop_distribution = 5 [json_name = "hopDistribution"];
  // Top repeater nodes by relay frequency.
  repeated TopRepeater top_repeaters = 6 [json_name = "topRepeaters"];
  // Top co-occurring relay pairs.
  repeated TopPair top_pairs = 7 [json_name = "topPairs"];
  // Hop count vs average SNR.
  repeated HopsVsSnr hops_vs_snr = 8 [json_name = "hopsVsSnr"];
  // All observers referenced in this analysis.
  repeated ObserverRef observers = 9;
  // Per-observer reach rings, keyed by observer_id.
  map<string, ObserverReach> per_observer_reach = 10 [json_name = "perObserverReach"];
  // Nodes seen by multiple observers.
  repeated MultiObsNode multi_obs_nodes = 11 [json_name = "multiObsNodes"];
  // Best path entries per node.
  repeated BestPathEntry best_path_list = 12 [json_name = "bestPathList"];
}

// ═══════════════════════════════════════════════════════════════════════════════
// GET /api/analytics/channels — Channel analytics
// ═══════════════════════════════════════════════════════════════════════════════

// Channel summary in analytics context.
message ChannelAnalyticsSummary {
  // Channel identifier (numeric hash).
  int32 hash = 1;
  // Channel display name.
  string name = 2;
  // Total messages.
  int32 messages = 3;
  // Unique sender count.
  int32 senders = 4;
  // Most recent activity (ISO 8601).
  string last_activity = 5 [json_name = "lastActivity"];
  // Whether the channel is encrypted.
  bool encrypted = 6;
}

// Top sender by message count.
message TopSender {
  // Sender display name.
  string name = 1;
  // Total messages sent.
  int32 count = 2;
}

// Hourly channel activity entry.
message ChannelTimelineEntry {
  // Hour label.
  string hour = 1;
  // Channel name.
  string channel = 2;
  // Message count in this hour.
  int32 count = 3;
}

// GET /api/analytics/channels — response.
message ChannelAnalyticsResponse {
  // Number of active channels.
  int32 active_channels = 1 [json_name = "activeChannels"];
  // Number of decryptable channels.
  int32 decryptable = 2;
  // Per-channel summaries.
  repeated ChannelAnalyticsSummary channels = 3;
  // Top senders by message count.
  repeated TopSender top_senders = 4 [json_name = "topSenders"];
  // Hourly activity per channel.
  repeated ChannelTimelineEntry channel_timeline = 5 [json_name = "channelTimeline"];
  // Raw array of message character lengths.
  repeated int32 msg_lengths = 6 [json_name = "msgLengths"];
}

// ═══════════════════════════════════════════════════════════════════════════════
// GET /api/analytics/distance — Hop distance analytics
// ═══════════════════════════════════════════════════════════════════════════════

// Distance summary statistics.
message DistanceSummary {
  // Total hop segments analyzed.
  int32 total_hops = 1 [json_name = "totalHops"];
  // Total paths analyzed.
  int32 total_paths = 2 [json_name = "totalPaths"];
  // Average hop distance in km (2 decimal places).
  double avg_dist = 3 [json_name = "avgDist"];
  // Maximum hop distance in km.
  double max_dist = 4 [json_name = "maxDist"];
}

// Single hop distance record (longest hops table).
message DistanceHop {
  // Source node name.
  string from_name = 1 [json_name = "fromName"];
  // Source node public key.
  string from_pk = 2 [json_name = "fromPk"];
  // Destination node name.
  string to_name = 3 [json_name = "toName"];
  // Destination node public key.
  string to_pk = 4 [json_name = "toPk"];
  // Distance in km.
  double dist = 5;
  // Hop category: "R↔R", "C↔R", "C↔C".
  string type = 6;
  // SNR at this hop (null if unavailable).
  optional double snr = 7;
  // Packet hash.
  string hash = 8;
  // Observation timestamp (ISO 8601).
  string timestamp = 9;
}

// Longest path record.
message DistancePath {
  // Packet hash.
  string hash = 1;
  // Total path distance in km.
  double total_dist = 2 [json_name = "totalDist"];
  // Number of hops.
  int32 hop_count = 3 [json_name = "hopCount"];
  // Observation timestamp (ISO 8601).
  string timestamp = 4;
  // Individual hops in this path.
  repeated DistancePathHop hops = 5;
}

// Single hop within a distance path.
message DistancePathHop {
  string from_name = 1 [json_name = "fromName"];
  string from_pk = 2 [json_name = "fromPk"];
  string to_name = 3 [json_name = "toName"];
  string to_pk = 4 [json_name = "toPk"];
  // Hop distance in km.
  double dist = 5;
}

// Per-category (R↔R, C↔R, C↔C) distance stats.
message CategoryDistStats {
  int32 count = 1;
  double avg = 2;
  double median = 3;
  double min = 4;
  double max = 5;
}

// Hourly average distance trend.
message DistOverTimeEntry {
  // Hour label.
  string hour = 1;
  // Average distance in km.
  double avg = 2;
  // Hop count in this hour.
  int32 count = 3;
}

// GET /api/analytics/distance — response.
message DistanceAnalyticsResponse {
  // Aggregate distance stats.
  DistanceSummary summary = 1;
  // Top individual hops by distance.
  repeated DistanceHop top_hops = 2 [json_name = "topHops"];
  // Top paths by total distance.
  repeated DistancePath top_paths = 3 [json_name = "topPaths"];
  // Per-category statistics, keyed by category string ("R↔R", "C↔R", "C↔C").
  map<string, CategoryDistStats> cat_stats = 4 [json_name = "catStats"];
  // Distance distribution histogram (empty array if no data).
  optional Histogram dist_histogram = 5 [json_name = "distHistogram"];
  // Hourly average distance trend.
  repeated DistOverTimeEntry dist_over_time = 6 [json_name = "distOverTime"];
}

// ═══════════════════════════════════════════════════════════════════════════════
// GET /api/analytics/hash-sizes — Hash size analysis
// ═══════════════════════════════════════════════════════════════════════════════

// Hourly hash size distribution entry.
message HashSizeHourly {
  // Hour label.
  string hour = 1;
  // Count of 1-byte hashes.
  int32 size_1 = 2 [json_name = "1"];
  // Count of 2-byte hashes.
  int32 size_2 = 3 [json_name = "2"];
  // Count of 3-byte hashes.
  int32 size_3 = 4 [json_name = "3"];
}

// Hop with hash size info.
message HashSizeHop {
  // Raw hex hop prefix.
  string hex = 1;
  // Hash size in bytes (ceil(hex.length/2)).
  int32 size = 2;
  // Times this hop was seen.
  int32 count = 3;
  // Resolved name (null if unresolved).
  optional string name = 4;
  // Resolved public key.
  optional string pubkey = 5;
}

// Node using multi-byte hashes.
message MultiByteNode {
  // Node display name.
  string name = 1;
  // Hash size in bytes.
  int32 hash_size = 2 [json_name = "hashSize"];
  // Packet count.
  int32 packets = 3;
  // Last seen timestamp (ISO 8601).
  string last_seen = 4 [json_name = "lastSeen"];
  // Public key (null if unresolved).
  optional string pubkey = 5;
}

// GET /api/analytics/hash-sizes — response.
message HashSizeAnalyticsResponse {
  // Total packets analyzed.
  int32 total = 1;
  // Hash size distribution keyed by byte size ("1", "2", "3").
  map<string, int32> distribution = 2;
  // Hourly hash size trends.
  repeated HashSizeHourly hourly = 3;
  // Top hop prefixes by frequency.
  repeated HashSizeHop top_hops = 4 [json_name = "topHops"];
  // Nodes using multi-byte hashes.
  repeated MultiByteNode multi_byte_nodes = 5 [json_name = "multiByteNodes"];
}

// ═══════════════════════════════════════════════════════════════════════════════
// GET /api/analytics/subpaths — Subpath frequency analysis
// ═══════════════════════════════════════════════════════════════════════════════

// Single subpath with frequency info.
message Subpath {
  // Human-readable path (e.g. "Node A → Node B → Node C").
  string path = 1;
  // Raw hex hop prefixes.
  repeated string raw_hops = 2 [json_name = "rawHops"];
  // Times this subpath was seen.
  int32 count = 3;
  // Number of hops in subpath.
  int32 hops = 4;
  // Percentage of totalPaths (0–100).
  double pct = 5;
}

// GET /api/analytics/subpaths — response.
message SubpathsResponse {
  repeated Subpath subpaths = 1;
  // Total paths analyzed.
  int32 total_paths = 2 [json_name = "totalPaths"];
}

// ═══════════════════════════════════════════════════════════════════════════════
// GET /api/analytics/subpath-detail — Detailed stats for a specific subpath
// ═══════════════════════════════════════════════════════════════════════════════

// Resolved node in a subpath detail response.
message SubpathNode {
  // Raw hex hop prefix.
  string hop = 1;
  // Resolved node name.
  string name = 2;
  // GPS latitude (null if unknown).
  optional double lat = 3;
  // GPS longitude (null if unknown).
  optional double lon = 4;
  // Resolved public key.
  optional string pubkey = 5;
}

// Signal quality stats for a subpath.
message SubpathSignal {
  // Average SNR (null if no samples).
  optional double avg_snr = 1 [json_name = "avgSnr"];
  // Average RSSI (null if no samples).
  optional double avg_rssi = 2 [json_name = "avgRssi"];
  // Number of signal samples.
  int32 samples = 3;
}

// Parent path containing this subpath.
message ParentPath {
  // Human-readable path string.
  string path = 1;
  // Times this parent path was seen.
  int32 count = 2;
}

// Observer count for subpath detail.
message SubpathObserver {
  // Observer display name.
  string name = 1;
  // Packet count from this observer.
  int32 count = 2;
}

// GET /api/analytics/subpath-detail — response.
message SubpathDetailResponse {
  // Input hops echoed back.
  repeated string hops = 1;
  // Resolved node info for each hop.
  repeated SubpathNode nodes = 2;
  // Total matching path occurrences.
  int32 total_matches = 3 [json_name = "totalMatches"];
  // Earliest match (ISO 8601).
  optional string first_seen = 4 [json_name = "firstSeen"];
  // Latest match (ISO 8601).
  optional string last_seen = 5 [json_name = "lastSeen"];
  // Signal quality across matches.
  SubpathSignal signal = 6;
  // 24-element array: packet count per UTC hour (index = hour).
  repeated int32 hour_distribution = 7 [json_name = "hourDistribution"];
  // Longer paths that contain this subpath.
  repeated ParentPath parent_paths = 8 [json_name = "parentPaths"];
  // Observers that saw this subpath.
  repeated SubpathObserver observers = 9;
}