//! Hands chain seam tests
//!
//! Verifies the integration seams in the Hand execution pipeline:
//! 1. Tool routing: LLM tool_call → HandRegistry correct dispatch
//! 2. Execution callback: Hand complete → LoopEvent emitted
//! 3. Non-hand tool routing

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

// ---------------------------------------------------------------------------
// Seam 1: Tool routing — LLM tool_call triggers HandTool dispatch
// ---------------------------------------------------------------------------

#[tokio::test]
async fn seam_hand_tool_routing() {
    // First stream: tool_use for hand_quiz
    let mock = MockLlmDriver::new()
        .with_stream_chunks(vec![
            StreamChunk::TextDelta { delta: "Let me generate a quiz.".to_string() },
            StreamChunk::ToolUseStart { id: "call_quiz_1".to_string(), name: "hand_quiz".to_string() },
            StreamChunk::ToolUseEnd {
                id: "call_quiz_1".to_string(),
                input: serde_json::json!({ "topic": "math", "count": 3 }),
            },
            StreamChunk::Complete {
                input_tokens: 10,
                output_tokens: 20,
                stop_reason: "tool_use".to_string(),
            },
        ])
        // Second stream: final text after tool executes
        .with_stream_chunks(vec![
            StreamChunk::TextDelta { delta: "Here is your quiz!".to_string() },
            StreamChunk::Complete {
                input_tokens: 10,
                output_tokens: 5,
                stop_reason: "end_turn".to_string(),
            },
        ]);

    let config = KernelConfig::default();
    let kernel = Kernel::boot_with_driver(config, Arc::new(mock) as Arc<dyn LlmDriver>)
        .await
        .expect("kernel boot");

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

    let mut rx = kernel
        .send_message_stream(&id, "Generate a math quiz".to_string())
        .await
        .expect("stream");

    let mut tool_starts = Vec::new();
    let mut tool_ends = Vec::new();
    let mut got_complete = false;
    while let Some(event) = rx.recv().await {
        match &event {
            LoopEvent::ToolStart { name, input } => {
                tool_starts.push((name.clone(), input.clone()));
            }
            LoopEvent::ToolEnd { name, output } => {
                tool_ends.push((name.clone(), output.clone()));
            }
            LoopEvent::Complete(_) => {
                got_complete = true;
                break;
            }
            LoopEvent::Error(msg) => {
                panic!("unexpected error: {}", msg);
            }
            _ => {}
        }
    }

    assert!(got_complete, "stream should complete");
    assert!(
        tool_starts.iter().any(|(n, _)| n == "hand_quiz"),
        "should see hand_quiz tool_start, got: {:?}",
        tool_starts
    );
}

// ---------------------------------------------------------------------------
// Seam 2: Execution callback — Hand completes and produces tool_end
// ---------------------------------------------------------------------------

#[tokio::test]
async fn seam_hand_execution_callback() {
    let mock = MockLlmDriver::new()
        .with_stream_chunks(vec![
            StreamChunk::ToolUseStart { id: "call_quiz_1".to_string(), name: "hand_quiz".to_string() },
            StreamChunk::ToolUseEnd {
                id: "call_quiz_1".to_string(),
                input: serde_json::json!({ "topic": "math" }),
            },
            StreamChunk::Complete {
                input_tokens: 10,
                output_tokens: 5,
                stop_reason: "tool_use".to_string(),
            },
        ])
        .with_stream_chunks(vec![
            StreamChunk::TextDelta { delta: "Done!".to_string() },
            StreamChunk::Complete {
                input_tokens: 5,
                output_tokens: 1,
                stop_reason: "end_turn".to_string(),
            },
        ]);

    let config = KernelConfig::default();
    let kernel = Kernel::boot_with_driver(config, Arc::new(mock) as Arc<dyn LlmDriver>)
        .await
        .expect("kernel boot");

    let agent_config = AgentConfig::new("test-agent");
    let id = agent_config.id;
    kernel.spawn_agent(agent_config).await.expect("spawn agent");

    let mut rx = kernel
        .send_message_stream(&id, "Quiz me".to_string())
        .await
        .expect("stream");

    let mut got_tool_end = false;
    let mut got_complete = false;
    while let Some(event) = rx.recv().await {
        match &event {
            LoopEvent::ToolEnd { name, output } => {
                got_tool_end = true;
                assert!(name.starts_with("hand_"), "tool_end should be hand tool, got: {}", name);
                // Quiz hand returns structured JSON output
                assert!(output.is_object() || output.is_string(), "output should be JSON, got: {}", output);
            }
            LoopEvent::Complete(_) => {
                got_complete = true;
                break;
            }
            LoopEvent::Error(msg) => {
                panic!("unexpected error: {}", msg);
            }
            _ => {}
        }
    }

    assert!(got_tool_end, "should receive tool_end after hand execution");
    assert!(got_complete, "should complete after tool_end");
}

// ---------------------------------------------------------------------------
// Seam 3: Non-hand tool call (generic tool) routes correctly
// ---------------------------------------------------------------------------

#[tokio::test]
async fn seam_generic_tool_routing() {
    // Mock with a generic tool call (web_search)
    let mock = MockLlmDriver::new()
        .with_stream_chunks(vec![
            StreamChunk::ToolUseStart { id: "call_ws_1".to_string(), name: "web_search".to_string() },
            StreamChunk::ToolUseEnd {
                id: "call_ws_1".to_string(),
                input: serde_json::json!({ "query": "test query" }),
            },
            StreamChunk::Complete {
                input_tokens: 10,
                output_tokens: 5,
                stop_reason: "tool_use".to_string(),
            },
        ])
        .with_stream_chunks(vec![
            StreamChunk::TextDelta { delta: "Search results found.".to_string() },
            StreamChunk::Complete {
                input_tokens: 5,
                output_tokens: 3,
                stop_reason: "end_turn".to_string(),
            },
        ]);

    let config = KernelConfig::default();
    let kernel = Kernel::boot_with_driver(config, Arc::new(mock) as Arc<dyn LlmDriver>)
        .await
        .expect("kernel boot");

    let agent_config = AgentConfig::new("test-agent");
    let id = agent_config.id;
    kernel.spawn_agent(agent_config).await.expect("spawn agent");

    let mut rx = kernel
        .send_message_stream(&id, "Search for test".to_string())
        .await
        .expect("stream");

    let mut tool_names = Vec::new();
    let mut got_complete = false;
    while let Some(event) = rx.recv().await {
        match &event {
            LoopEvent::ToolStart { name, .. } => tool_names.push(name.clone()),
            LoopEvent::ToolEnd { name, .. } => tool_names.push(format!("end:{}", name)),
            LoopEvent::Complete(_) => {
                got_complete = true;
                break;
            }
            LoopEvent::Error(msg) => {
                panic!("unexpected error: {}", msg);
            }
            _ => {}
        }
    }

    assert!(got_complete, "stream should complete");
    assert!(
        tool_names.iter().any(|n| n.contains("web_search")),
        "should see web_search tool events, got: {:?}",
        tool_names
    );
}