use std::collections::HashMap;
/// Module Distributed Tracing pour production
use std::sync::Arc;
use std::time::{Duration, SystemTime};
use tokio::sync::RwLock;
// Note: Use tracing::info! macro directly instead of importing
use crate::error::AppError;
use serde::{Deserialize, Serialize};
use uuid::Uuid;

#[derive(Debug)]
pub struct TracingManager {
    config: TracingConfig,
    active_spans: Arc<RwLock<HashMap<String, TraceSpan>>>,
}

#[derive(Debug, Clone)]
pub struct TracingConfig {
    pub jaeger_endpoint: String,
    pub service_name: String,
    pub service_version: String,
    pub sampling_rate: f64,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct TraceSpan {
    pub span_id: String,
    pub trace_id: String,
    pub operation_name: String,
    pub start_time: SystemTime,
    pub end_time: Option<SystemTime>,
    pub status: SpanStatus,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum SpanStatus {
    Ok,
    Error(String),
}

impl Default for TracingConfig {
    fn default() -> Self {
        Self {
            jaeger_endpoint: "http://localhost:14268".to_string(),
            service_name: "veza-stream-server".to_string(),
            service_version: "0.2.0".to_string(),
            sampling_rate: 1.0,
        }
    }
}

impl TracingManager {
    pub async fn new(config: TracingConfig) -> Result<Self, AppError> {
        tracing::info!("🔍 Initialisation Tracing Manager");
        Ok(Self {
            config,
            active_spans: Arc::new(RwLock::new(HashMap::new())),
        })
    }

    pub async fn start(&self) -> Result<(), AppError> {
        tracing::info!("🚀 Démarrage Tracing Manager");
        Ok(())
    }

    pub async fn stop(&self) -> Result<(), AppError> {
        tracing::info!("🛑 Arrêt Tracing Manager");
        Ok(())
    }

    pub async fn start_span(
        &self,
        operation_name: &str,
        _parent_id: Option<String>,
    ) -> Result<String, AppError> {
        let span_id = Uuid::new_v4().to_string();
        let span = TraceSpan {
            span_id: span_id.clone(),
            trace_id: Uuid::new_v4().to_string(),
            operation_name: operation_name.to_string(),
            start_time: SystemTime::now(),
            end_time: None,
            status: SpanStatus::Ok,
        };

        let mut spans = self.active_spans.write().await;
        spans.insert(span_id.clone(), span);
        tracing::debug!("🆕 Span créé: {}", span_id);
        Ok(span_id)
    }
}
