// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

syntax = "proto3";

package mattermost.pluginapi.v1;

option go_package = "github.com/mattermost/mattermost/server/public/pluginapi/grpc/generated/go/pluginapiv1";

import "google/protobuf/struct.proto";
import "common.proto";
import "hooks_common.proto";
import "api_remaining.proto";
import "file.proto";
import "post.proto";
import "user.proto";

// ==============================================================================
// COMMAND, WEBSOCKET, CLUSTER, SHARED CHANNELS, AND SUPPORT HOOK MESSAGES
// ==============================================================================
//
// This file defines request/response messages for command execution, WebSocket events,
// cluster events, shared channels, and support data generation hooks.
//
// Covered hooks (from server/public/plugin/hooks.go):
// - ExecuteCommand(c *Context, args *model.CommandArgs) (*model.CommandResponse, *model.AppError)
// - OnPluginClusterEvent(c *Context, ev model.PluginClusterEvent)
// - OnWebSocketConnect(webConnID, userID string)
// - OnWebSocketDisconnect(webConnID, userID string)
// - WebSocketMessageHasBeenPosted(webConnID, userID string, req *model.WebSocketRequest)
// - OnSharedChannelsSyncMsg(msg *model.SyncMsg, rc *model.RemoteCluster) (model.SyncResponse, error)
// - OnSharedChannelsPing(rc *model.RemoteCluster) bool
// - OnSharedChannelsAttachmentSyncMsg(fi *model.FileInfo, post *model.Post, rc *model.RemoteCluster) error
// - OnSharedChannelsProfileImageSyncMsg(user *model.User, rc *model.RemoteCluster) error
// - GenerateSupportData(c *Context) ([]*model.FileData, error)
//
// NOTE: ServeHTTP and ServeMetrics are deferred to Phase 8 (HTTP streaming).
// These hooks require HTTP request/response streaming over gRPC.
//
// SHARED TYPES:
// - CommandArgs, CommandResponse, PluginClusterEvent are imported from api_remaining.proto
// - FileInfo, Post, User are imported from their respective proto files
//
// ==============================================================================

// -----------------------------------------------------------------------------
// Model Types (types not already defined elsewhere)
// -----------------------------------------------------------------------------

// WebSocketRequest represents a WebSocket message request from a client.
// Maps to model.WebSocketRequest in Go (server/public/model/websocket_request.go).
//
// Note: Server-provided fields (Session, T, Locale) are not passed over the wire.
message WebSocketRequest {
  // Sequence number incremented for every request
  int64 seq = 1;

  // The action to perform (e.g., "get_statuses", "user_typing")
  string action = 2;

  // Action metadata
  google.protobuf.Struct data = 3;
}

// SyncMsgJson wraps a serialized model.SyncMsg as JSON bytes.
// SyncMsg is a complex type with nested maps and slices of various models
// (User, Post, Reaction, Status, MembershipChangeMsg, PostAcknowledgement).
// Using a JSON blob avoids creating extensive proto definitions and provides
// flexibility for changes in the SyncMsg structure.
message SyncMsgJson {
  // JSON-encoded model.SyncMsg
  bytes sync_msg_json = 1;
}

// SyncResponse represents the response to a shared channels synchronization event.
// Maps to model.SyncResponse in Go (server/public/model/shared_channel.go).
message SyncResponse {
  // Timestamp of the last user update processed
  int64 users_last_update_at = 1;

  // User IDs that failed to sync
  repeated string user_errors = 2;

  // User IDs that were successfully synced
  repeated string users_syncd = 3;

  // Timestamp of the last post update processed
  int64 posts_last_update_at = 4;

  // Post IDs that failed to sync
  repeated string post_errors = 5;

  // Timestamp of the last reaction update processed
  int64 reactions_last_update_at = 6;

  // Reaction post IDs that failed to sync
  repeated string reaction_errors = 7;

  // Timestamp of the last acknowledgement update processed
  int64 acknowledgements_last_update_at = 8;

  // Acknowledgement IDs that failed to sync
  repeated string acknowledgement_errors = 9;

  // User IDs for which status sync failed
  repeated string status_errors = 10;
}

// RemoteCluster represents a remote cluster for shared channels.
// Maps to model.RemoteCluster in Go (server/public/model/remote_cluster.go).
message RemoteCluster {
  // Unique identifier for the remote cluster
  string remote_id = 1;

  // Deprecated: remote_team_id is no longer used
  string remote_team_id = 2;

  // Internal name of the remote cluster
  string name = 3;

  // Display name shown to users
  string display_name = 4;

  // URL of the remote Mattermost server
  string site_url = 5;

  // Default team ID for the remote cluster
  string default_team_id = 6;

  // Timestamp when the remote cluster was created
  int64 create_at = 7;

  // Timestamp when the remote cluster was deleted (0 if active)
  int64 delete_at = 8;

  // Timestamp of last successful ping
  int64 last_ping_at = 9;

  // Timestamp of last global user sync
  int64 last_global_user_sync_at = 10;

  // Authentication token (sensitive, may be empty in responses)
  string token = 11;

  // Token from the remote cluster (sensitive, may be empty)
  string remote_token = 12;

  // Space-separated list of topics
  string topics = 13;

  // ID of the user who created the remote cluster
  string creator_id = 14;

  // Plugin ID if sync messages are delivered via plugin API
  string plugin_id = 15;

  // Bit-flag options
  uint32 options = 16;
}

// -----------------------------------------------------------------------------
// ExecuteCommand Hook
// Signature: ExecuteCommand(c *Context, args *model.CommandArgs) (*model.CommandResponse, *model.AppError)
// Executes a registered slash command.
//
// Note: Uses CommandArgs and CommandResponse from api_remaining.proto
// -----------------------------------------------------------------------------

message ExecuteCommandRequest {
  RequestContext context = 1;

  // Plugin context with session/request metadata
  PluginContext plugin_context = 2;

  // The command arguments (from api_remaining.proto)
  CommandArgs args = 3;
}

message ExecuteCommandResponse {
  // Error returned by the plugin (null on success)
  AppError error = 1;

  // The command response (may be null if only error is returned)
  // Note: Uses CommandResponse from api_remaining.proto
  CommandResponse response = 2;
}

// -----------------------------------------------------------------------------
// OnPluginClusterEvent Hook
// Signature: OnPluginClusterEvent(c *Context, ev model.PluginClusterEvent)
// Receives intra-cluster plugin events. This is a notification hook.
//
// Note: Uses PluginClusterEvent from api_remaining.proto
// -----------------------------------------------------------------------------

message OnPluginClusterEventRequest {
  RequestContext context = 1;

  // Plugin context with session/request metadata
  PluginContext plugin_context = 2;

  // The cluster event (from api_remaining.proto)
  PluginClusterEvent event = 3;
}

message OnPluginClusterEventResponse {
  // No error field because the Go signature has no return value.
  // Hook failures are logged but do not affect server operation.
}

// -----------------------------------------------------------------------------
// OnWebSocketConnect Hook
// Signature: OnWebSocketConnect(webConnID, userID string)
// Invoked when a new WebSocket connection is opened. No Context parameter.
// -----------------------------------------------------------------------------

message OnWebSocketConnectRequest {
  RequestContext context = 1;

  // The WebSocket connection ID
  string web_conn_id = 2;

  // The ID of the user who connected
  string user_id = 3;
}

message OnWebSocketConnectResponse {
  // No error field because the Go signature has no return value.
  // Hook failures are logged but do not affect server operation.
}

// -----------------------------------------------------------------------------
// OnWebSocketDisconnect Hook
// Signature: OnWebSocketDisconnect(webConnID, userID string)
// Invoked when a WebSocket connection is closed. No Context parameter.
// -----------------------------------------------------------------------------

message OnWebSocketDisconnectRequest {
  RequestContext context = 1;

  // The WebSocket connection ID
  string web_conn_id = 2;

  // The ID of the user who disconnected
  string user_id = 3;
}

message OnWebSocketDisconnectResponse {
  // No error field because the Go signature has no return value.
  // Hook failures are logged but do not affect server operation.
}

// -----------------------------------------------------------------------------
// WebSocketMessageHasBeenPosted Hook
// Signature: WebSocketMessageHasBeenPosted(webConnID, userID string, req *model.WebSocketRequest)
// Invoked when a WebSocket message is received. No Context parameter.
// -----------------------------------------------------------------------------

message WebSocketMessageHasBeenPostedRequest {
  RequestContext context = 1;

  // The WebSocket connection ID
  string web_conn_id = 2;

  // The ID of the user who sent the message
  string user_id = 3;

  // The WebSocket request
  WebSocketRequest request = 4;
}

message WebSocketMessageHasBeenPostedResponse {
  // No error field because the Go signature has no return value.
  // Hook failures are logged but do not affect server operation.
}

// -----------------------------------------------------------------------------
// OnSharedChannelsSyncMsg Hook
// Signature: OnSharedChannelsSyncMsg(msg *model.SyncMsg, rc *model.RemoteCluster) (model.SyncResponse, error)
// Receives shared channels sync messages.
// -----------------------------------------------------------------------------

message OnSharedChannelsSyncMsgRequest {
  RequestContext context = 1;

  // The sync message as JSON (complex nested structure)
  SyncMsgJson sync_msg = 2;

  // The remote cluster that sent the message
  RemoteCluster remote_cluster = 3;
}

message OnSharedChannelsSyncMsgResponse {
  // Error returned by the plugin (null on success)
  AppError error = 1;

  // The sync response
  SyncResponse response = 2;
}

// -----------------------------------------------------------------------------
// OnSharedChannelsPing Hook
// Signature: OnSharedChannelsPing(rc *model.RemoteCluster) bool
// Health check for shared channels plugin. Returns true if healthy.
// -----------------------------------------------------------------------------

message OnSharedChannelsPingRequest {
  RequestContext context = 1;

  // The remote cluster performing the ping
  RemoteCluster remote_cluster = 2;
}

message OnSharedChannelsPingResponse {
  // True if the plugin is healthy, false otherwise
  bool healthy = 1;
}

// -----------------------------------------------------------------------------
// OnSharedChannelsAttachmentSyncMsg Hook
// Signature: OnSharedChannelsAttachmentSyncMsg(fi *model.FileInfo, post *model.Post, rc *model.RemoteCluster) error
// Receives file attachment sync messages from shared channels.
// -----------------------------------------------------------------------------

message OnSharedChannelsAttachmentSyncMsgRequest {
  RequestContext context = 1;

  // The file info to sync
  FileInfo file_info = 2;

  // The post the file is attached to
  Post post = 3;

  // The remote cluster that sent the message
  RemoteCluster remote_cluster = 4;
}

message OnSharedChannelsAttachmentSyncMsgResponse {
  // Error returned by the plugin (null on success)
  AppError error = 1;
}

// -----------------------------------------------------------------------------
// OnSharedChannelsProfileImageSyncMsg Hook
// Signature: OnSharedChannelsProfileImageSyncMsg(user *model.User, rc *model.RemoteCluster) error
// Receives profile image sync messages from shared channels.
// -----------------------------------------------------------------------------

message OnSharedChannelsProfileImageSyncMsgRequest {
  RequestContext context = 1;

  // The user whose profile image should be synced
  User user = 2;

  // The remote cluster that sent the message
  RemoteCluster remote_cluster = 3;
}

message OnSharedChannelsProfileImageSyncMsgResponse {
  // Error returned by the plugin (null on success)
  AppError error = 1;
}

// -----------------------------------------------------------------------------
// GenerateSupportData Hook
// Signature: GenerateSupportData(c *Context) ([]*model.FileData, error)
// Generates plugin support data for inclusion in Support Packets.
// -----------------------------------------------------------------------------

message GenerateSupportDataRequest {
  RequestContext context = 1;

  // Plugin context with session/request metadata
  PluginContext plugin_context = 2;
}

message GenerateSupportDataResponse {
  // Error returned by the plugin (null on success)
  AppError error = 1;

  // Files to include in the support packet
  // Note: Uses FileData from file.proto
  repeated FileData files = 2;
}