//! Title generation middleware — auto-generates conversation titles after the first turn.
//!
//! Inspired by DeerFlow's TitleMiddleware: after the first user-assistant exchange,
//! generates a short descriptive title using the LLM instead of defaulting to
//! "新对话" or truncating the user's first message.
//!
//! Priority 180 — runs after compaction (100) and memory (150), before skill index (200).

use async_trait::async_trait;
use zclaw_types::Result;
use crate::middleware::{AgentMiddleware, MiddlewareContext};

/// Middleware that auto-generates conversation titles after the first exchange.
pub struct TitleMiddleware {
    /// Whether a title has been generated for the current session.
    titled: std::sync::atomic::AtomicBool,
}

impl TitleMiddleware {
    pub fn new() -> Self {
        Self {
            titled: std::sync::atomic::AtomicBool::new(false),
        }
    }
}

impl Default for TitleMiddleware {
    fn default() -> Self {
        Self::new()
    }
}

#[async_trait]
impl AgentMiddleware for TitleMiddleware {
    fn name(&self) -> &str { "title" }
    fn priority(&self) -> i32 { 180 }
}