//! Chat smoke test — full lifecycle: send → stream → persist
//!
//! Uses MockLlmDriver to verify the complete chat pipeline without a real LLM.

use std::sync::Arc;
use zclaw_kernel::{Kernel, KernelConfig};
use zclaw_runtime::test_util::MockLlmDriver;
use zclaw_runtime::{LoopEvent, LlmDriver};
use zclaw_types::AgentConfig;

#[tokio::test]
async fn smoke_chat_full_lifecycle() {
    let mock = MockLlmDriver::new().with_text_response("Hello! I am the mock assistant.");
    let config = KernelConfig::default();
    let kernel = Kernel::boot_with_driver(config, Arc::new(mock) as Arc<dyn LlmDriver>)
        .await
        .expect("kernel boot");

    let agent = AgentConfig::new("smoke-agent")
        .with_system_prompt("You are a test assistant.");
    let id = agent.id;
    kernel.spawn_agent(agent).await.expect("spawn agent");

    // 1. Non-streaming: send and get response
    let resp = kernel.send_message(&id, "Hello".to_string()).await.expect("send");
    assert!(!resp.content.is_empty());
    assert!(resp.output_tokens > 0);

    // 2. Streaming: send and collect all events
    let mut rx = kernel
        .send_message_stream(&id, "Tell me more".to_string())
        .await
        .expect("stream");

    let mut delta_count = 0;
    let mut complete_result = None;
    while let Some(event) = rx.recv().await {
        match event {
            LoopEvent::Delta(text) => {
                delta_count += 1;
                assert!(!text.is_empty(), "delta should have content");
            }
            LoopEvent::Complete(result) => {
                complete_result = Some(result);
                break;
            }
            LoopEvent::Error(msg) => panic!("unexpected error: {}", msg),
            _ => {}
        }
    }

    assert!(delta_count > 0, "should receive at least one delta");
    let result = complete_result.expect("should receive complete");
    assert!(result.output_tokens > 0);

    // 3. Verify session persistence — messages were saved
    let agent_info = kernel.get_agent(&id).expect("agent should exist");
    assert!(agent_info.message_count >= 2, "at least 2 messages should be tracked");
}