vta-service 0.4.0

//! DIDComm message router built on `affinidi-messaging-didcomm-service`.
//!
//! Replaces the manual `dispatch_message()` match statement with a typed
//! Router that maps message types to handler functions. Shared state is
//! injected via `Extension<Arc<VtaState>>`.

use std::sync::Arc;

use affinidi_messaging_didcomm_service::{
    DIDCommServiceError, MESSAGE_PICKUP_STATUS_TYPE, MessagePolicy, RequestLogging, Router,
    TRUST_PING_TYPE, handler_fn, ignore_handler, trust_ping_handler,
};
use tokio::sync::RwLock;
use tracing::debug;

use affinidi_did_resolver_cache_sdk::DIDCacheClient;

use crate::config::AppConfig;
use crate::didcomm_bridge::DIDCommBridge;
use crate::keys::seed_store::SeedStore;
use crate::store::KeyspaceHandle;

use super::handlers;

#[cfg(feature = "tee")]
use vta_sdk::protocols::attestation_management;
#[cfg(feature = "webvh")]
use vta_sdk::protocols::did_management;
use vta_sdk::protocols::{
    self, acl_management, audit_management, context_management, credential_management,
    key_management, seed_management, vta_management,
};

/// Shared state injected into all DIDComm handlers via `Extension<Arc<VtaState>>`.
#[derive(Clone)]
pub struct VtaState {
    pub keys_ks: KeyspaceHandle,
    pub acl_ks: KeyspaceHandle,
    pub contexts_ks: KeyspaceHandle,
    pub audit_ks: KeyspaceHandle,
    pub imported_ks: KeyspaceHandle,
    #[cfg(feature = "webvh")]
    pub webvh_ks: KeyspaceHandle,
    pub seed_store: Arc<dyn SeedStore>,
    pub config: Arc<RwLock<AppConfig>>,
    pub did_resolver: Option<DIDCacheClient>,
    /// DIDComm bridge for outbound WebVH server communication.
    pub didcomm_bridge: Arc<DIDCommBridge>,
    #[cfg(feature = "tee")]
    pub tee_state: Option<crate::tee::TeeState>,
    /// Send `true` to trigger a soft restart.
    pub restart_tx: tokio::sync::watch::Sender<bool>,
}

// ---------------------------------------------------------------------------
// BridgeHandler — wraps the Router to intercept outbound-response routing
// ---------------------------------------------------------------------------

/// Handler wrapper that bridges the DIDComm listener's ATM to the
/// outbound [`DIDCommBridge`].
///
/// On every inbound message this handler:
/// 1. Captures the listener's ATM/profile so the bridge can reuse the
///    same mediator connection for outbound sends.
/// 2. Checks if the message completes a pending outbound request
///    (via [`DIDCommBridge::try_complete`]). If so, the message is
///    consumed and not dispatched to the inner Router.
/// 3. Otherwise delegates to the inner Router for normal handler dispatch.
pub struct BridgeHandler {
    inner: Router,
    bridge: Arc<DIDCommBridge>,
}

#[async_trait::async_trait]
impl affinidi_messaging_didcomm_service::DIDCommHandler for BridgeHandler {
    async fn handle(
        &self,
        ctx: affinidi_messaging_didcomm_service::HandlerContext,
        message: affinidi_messaging_didcomm::Message,
        meta: affinidi_messaging_didcomm::UnpackMetadata,
    ) -> Result<Option<affinidi_messaging_didcomm_service::DIDCommResponse>, DIDCommServiceError>
    {
        // Route responses to pending outbound requests before normal dispatch.
        if self.bridge.try_complete(&message) {
            return Ok(None);
        }

        // Log unmatched responses (likely stale messages from a previous session)
        if message.thid.is_some() {
            debug!(
                msg_type = %message.typ,
                thid = message.thid.as_deref().unwrap_or(""),
                from = message.from.as_deref().unwrap_or("unknown"),
                "unmatched response — no pending request for thread (stale message)"
            );
        }

        self.inner.handle(ctx, message, meta).await
    }
}

/// Build the DIDComm message handler with all VTA protocol handlers.
///
/// Returns a [`BridgeHandler`] that wraps the Router and integrates
/// outbound request-response routing via the shared [`DIDCommBridge`].
pub fn build_handler(
    state: Arc<VtaState>,
    bridge: Arc<DIDCommBridge>,
) -> Result<BridgeHandler, DIDCommServiceError> {
    let mut router = Router::new()
        .extension(state)
        // Built-in protocol handlers
        .route(TRUST_PING_TYPE, handler_fn(trust_ping_handler))?
        .route(MESSAGE_PICKUP_STATUS_TYPE, handler_fn(ignore_handler))?
        // Key management
        .route(
            key_management::CREATE_KEY,
            handler_fn(handlers::handle_create_key),
        )?
        .route(
            key_management::GET_KEY,
            handler_fn(handlers::handle_get_key),
        )?
        .route(
            key_management::LIST_KEYS,
            handler_fn(handlers::handle_list_keys),
        )?
        .route(
            key_management::RENAME_KEY,
            handler_fn(handlers::handle_rename_key),
        )?
        .route(
            key_management::REVOKE_KEY,
            handler_fn(handlers::handle_revoke_key),
        )?
        .route(
            key_management::GET_KEY_SECRET,
            handler_fn(handlers::handle_get_key_secret),
        )?
        .route(
            key_management::SIGN_REQUEST,
            handler_fn(handlers::handle_sign_request),
        )?
        // Seed management
        .route(
            seed_management::LIST_SEEDS,
            handler_fn(handlers::handle_list_seeds),
        )?
        .route(
            seed_management::ROTATE_SEED,
            handler_fn(handlers::handle_rotate_seed),
        )?
        // Context management
        .route(
            context_management::CREATE_CONTEXT,
            handler_fn(handlers::handle_create_context),
        )?
        .route(
            context_management::GET_CONTEXT,
            handler_fn(handlers::handle_get_context),
        )?
        .route(
            context_management::LIST_CONTEXTS,
            handler_fn(handlers::handle_list_contexts),
        )?
        .route(
            context_management::UPDATE_CONTEXT,
            handler_fn(handlers::handle_update_context),
        )?
        .route(
            context_management::UPDATE_CONTEXT_DID,
            handler_fn(handlers::handle_update_context_did),
        )?
        .route(
            context_management::PREVIEW_DELETE_CONTEXT,
            handler_fn(handlers::handle_preview_delete_context),
        )?
        .route(
            context_management::DELETE_CONTEXT,
            handler_fn(handlers::handle_delete_context),
        )?
        // ACL management
        .route(
            acl_management::CREATE_ACL,
            handler_fn(handlers::handle_create_acl),
        )?
        .route(
            acl_management::GET_ACL,
            handler_fn(handlers::handle_get_acl),
        )?
        .route(
            acl_management::LIST_ACL,
            handler_fn(handlers::handle_list_acl),
        )?
        .route(
            acl_management::UPDATE_ACL,
            handler_fn(handlers::handle_update_acl),
        )?
        .route(
            acl_management::DELETE_ACL,
            handler_fn(handlers::handle_delete_acl),
        )?
        // Audit management
        .route(
            audit_management::LIST_LOGS,
            handler_fn(handlers::handle_list_logs),
        )?
        .route(
            audit_management::GET_RETENTION,
            handler_fn(handlers::handle_get_retention),
        )?
        .route(
            audit_management::UPDATE_RETENTION,
            handler_fn(handlers::handle_update_retention),
        )?
        // VTA management
        .route(
            vta_management::GET_CONFIG,
            handler_fn(handlers::handle_get_config),
        )?
        .route(
            vta_management::UPDATE_CONFIG,
            handler_fn(handlers::handle_update_config),
        )?
        // Credential management
        .route(
            credential_management::GENERATE_CREDENTIALS,
            handler_fn(handlers::handle_generate_credentials),
        )?
        // Problem reports
        .route(
            protocols::PROBLEM_REPORT_TYPE,
            handler_fn(handlers::handle_problem_report),
        )?
        // VTA management — restart
        .route(
            vta_management::RESTART,
            handler_fn(handlers::handle_restart),
        )?
        // Backup management
        .route(
            protocols::backup_management::EXPORT_BACKUP,
            handler_fn(handlers::handle_backup_export),
        )?
        .route(
            protocols::backup_management::IMPORT_BACKUP,
            handler_fn(handlers::handle_backup_import),
        )?;

    // WebVH handlers (feature-gated)
    #[cfg(feature = "webvh")]
    {
        router = router
            .route(
                did_management::CREATE_DID_WEBVH,
                handler_fn(handlers::handle_create_did_webvh),
            )?
            .route(
                did_management::GET_DID_WEBVH,
                handler_fn(handlers::handle_get_did_webvh),
            )?
            .route(
                did_management::GET_DID_WEBVH_LOG,
                handler_fn(handlers::handle_get_did_webvh_log),
            )?
            .route(
                did_management::LIST_DIDS_WEBVH,
                handler_fn(handlers::handle_list_dids_webvh),
            )?
            .route(
                did_management::DELETE_DID_WEBVH,
                handler_fn(handlers::handle_delete_did_webvh),
            )?
            .route(
                did_management::ADD_WEBVH_SERVER,
                handler_fn(handlers::handle_add_webvh_server),
            )?
            .route(
                did_management::LIST_WEBVH_SERVERS,
                handler_fn(handlers::handle_list_webvh_servers),
            )?
            .route(
                did_management::UPDATE_WEBVH_SERVER,
                handler_fn(handlers::handle_update_webvh_server),
            )?
            .route(
                did_management::REMOVE_WEBVH_SERVER,
                handler_fn(handlers::handle_remove_webvh_server),
            )?;
    }

    // TEE attestation handlers (feature-gated)
    #[cfg(feature = "tee")]
    {
        router = router
            .route(
                attestation_management::GET_TEE_STATUS,
                handler_fn(handlers::handle_tee_status),
            )?
            .route(
                attestation_management::REQUEST_ATTESTATION,
                handler_fn(handlers::handle_request_attestation),
            )?;
    }

    // Discovery (no auth required — the handler doesn't call auth_from_message)
    router = router.route(
        protocols::discovery::DISCOVER_CAPABILITIES,
        handler_fn(handlers::handle_discover_capabilities),
    )?;

    // Fallback, middleware, error handling
    router = router
        .fallback(handler_fn(handlers::handle_unknown))
        .layer(
            MessagePolicy::new()
                .require_encrypted(true)
                .require_authenticated(true)
                .allow_anonymous_sender(false),
        )
        .layer(RequestLogging);

    Ok(BridgeHandler {
        inner: router,
        bridge,
    })
}