use serde::{Deserialize, Serialize};
use serde_json::Value;

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[serde(rename_all = "snake_case")]
pub enum AgentType {
    Smart,
    Service,
    Backup,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct MetricsEnvelope {
    pub hostname: String,
    pub agent_type: AgentType,
    pub timestamp: u64,
    #[serde(default)]
    pub metrics: Value,
}

// Alias for backward compatibility
pub type MessageEnvelope = MetricsEnvelope;