anya-core 1.2.0

//! Enterprise Communications Module
//!
//! This module provides enterprise-grade communication capabilities,
//! with NostrClient as the default for system communications (DAO, internal, etc.)
//!
//! # Features
//!
//! - NostrClient for decentralized communications
//! - DAO integration
//! - Internal system messaging
//! - Enterprise-grade security

use serde::{Deserialize, Serialize};
use std::error::Error;
use std::fmt;

/// Nostr configuration for enterprise communications
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct NostrConfig {
    /// Private key for Nostr identity
    pub private_key: String,
    /// List of relay URLs
    pub relays: Vec<String>,
    /// Optional user metadata
    pub metadata: Option<NostrMetadata>,
}

/// Nostr user metadata
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct NostrMetadata {
    pub name: Option<String>,
    pub about: Option<String>,
    pub picture: Option<String>,
}

/// Nostr user profile
#[derive(Debug, Clone)]
pub struct NostrUserProfile {
    pub public_key: String,
    pub private_key: String,
    pub metadata: Option<NostrMetadata>,
}

impl NostrUserProfile {
    /// Subscribe with an existing key
    pub async fn subscribe_with_key(
        private_key: &str,
        _relays: Option<Vec<String>>,
    ) -> Result<Self, Box<dyn Error>> {
        // TODO: Implement actual Nostr key derivation
        let public_key = format!("npub{}", &private_key[4..]);

        Ok(NostrUserProfile {
            public_key,
            private_key: private_key.to_string(),
            metadata: None,
        })
    }

    /// Convert to nsec format
    pub fn to_nsec(&self) -> Result<String, Box<dyn Error>> {
        Ok(self.private_key.clone())
    }
}

/// Nostr client for enterprise communications
pub struct NostrClient {
    #[allow(dead_code)] // Required for future Nostr extensibility (see docs/INDEX_CORRECTED.md)
    config: NostrConfig,
    connected: bool,
}

impl NostrClient {
    /// Create a new NostrClient
    pub async fn new(config: NostrConfig) -> Result<Self, Box<dyn Error>> {
        Ok(NostrClient {
            config,
            connected: false,
        })
    }

    /// Connect to Nostr relays
    pub async fn connect(&mut self) -> Result<(), Box<dyn Error>> {
        // TODO: Implement actual Nostr relay connections
        self.connected = true;
        Ok(())
    }

    /// Send a message through Nostr
    pub async fn send_message(
        &self,
        content: &str,
        recipient: Option<&str>,
    ) -> Result<String, Box<dyn Error>> {
        if !self.connected {
            return Err("Not connected to relays".into());
        }

        // TODO: Implement actual Nostr message sending
        let event_id = format!("event_{}", uuid::Uuid::new_v4());
        println!(
            "Sent Nostr message: {} -> {}",
            content,
            recipient.unwrap_or("public")
        );
        Ok(event_id)
    }

    /// Publish a note
    pub async fn publish_note(&self, content: &str) -> Result<String, Box<dyn Error>> {
        self.send_message(content, None).await
    }

    /// Send a direct message
    pub async fn send_dm(&self, recipient: &str, content: &str) -> Result<String, Box<dyn Error>> {
        self.send_message(content, Some(recipient)).await
    }
}

impl Default for NostrConfig {
    fn default() -> Self {
        Self {
            private_key: "nsec1example".to_string(),
            relays: vec![
                "wss://relay.damus.io".to_string(),
                "wss://relay.nostr.info".to_string(),
                "wss://nostr-pub.wellorder.net".to_string(),
            ],
            metadata: None,
        }
    }
}

/// Enterprise communication error types
#[derive(Debug)]
pub enum EnterpriseError {
    Connection(String),
    Authentication(String),
    Message(String),
    Relay(String),
}

impl fmt::Display for EnterpriseError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            EnterpriseError::Connection(msg) => write!(f, "Connection error: {msg}"),
            EnterpriseError::Authentication(msg) => write!(f, "Authentication error: {msg}"),
            EnterpriseError::Message(msg) => write!(f, "Message error: {msg}"),
            EnterpriseError::Relay(msg) => write!(f, "Relay error: {msg}"),
        }
    }
}

impl Error for EnterpriseError {}