//! Memory embedding tests (EM-07 ~ EM-08)
//!
//! Validates memory retrieval with embedding enhancement and configuration hot-update.

use std::sync::Arc;
use async_trait::async_trait;
use zclaw_growth::{
    EmbeddingClient, MemoryEntry, MemoryRetriever, MemoryType, SqliteStorage, VikingAdapter,
};
use zclaw_types::AgentId;

/// Mock embedding client that returns deterministic 128-dim vectors.
struct MockEmbeddingClient {
    dim: usize,
}

impl MockEmbeddingClient {
    fn new() -> Self {
        Self { dim: 128 }
    }
}

#[async_trait::async_trait]
impl EmbeddingClient for MockEmbeddingClient {
    async fn embed(&self, text: &str) -> Result<Vec<f32>, String> {
        let mut vec = vec![0.0f32; self.dim];
        for (i, b) in text.as_bytes().iter().enumerate() {
            vec[i % self.dim] += (*b as f32) / 255.0;
        }
        let norm: f32 = vec.iter().map(|v| v * v).sum::<f32>().sqrt().max(1e-8);
        for v in vec.iter_mut() {
            *v /= norm;
        }
        Ok(vec)
    }

    fn is_available(&self) -> bool {
        true
    }
}

/// EM-07: Memory retrieval with embedding enhancement.
#[tokio::test]
async fn em07_memory_retrieval_embedding_enhanced() {
    let storage = Arc::new(SqliteStorage::in_memory().await);
    let adapter = Arc::new(VikingAdapter::new(storage));

    let agent_id = AgentId::new();

    // Store 20 mixed Chinese/English memories
    let entries = vec![
        ("pref-theme", MemoryType::Preference, "用户偏好深色模式"),
        ("pref-language", MemoryType::Preference, "用户使用中文沟通"),
        ("know-rust", MemoryType::Knowledge, "Rust async programming with tokio"),
        ("know-python", MemoryType::Knowledge, "Python data science with pandas"),
        ("exp-report", MemoryType::Experience, "月度报表生成经验：使用Excel宏自动化"),
        ("know-react", MemoryType::Knowledge, "React hooks patterns"),
        ("pref-editor", MemoryType::Preference, "偏好 VS Code 编辑器"),
        ("exp-schedule", MemoryType::Experience, "排班冲突解决方案：协商调换"),
        ("know-sql", MemoryType::Knowledge, "SQL query optimization techniques"),
        ("exp-deploy", MemoryType::Experience, "部署失败经验：端口冲突检测"),
        ("know-docker", MemoryType::Knowledge, "Docker container networking"),
        ("pref-font", MemoryType::Preference, "字体大小偏好 14px"),
        ("know-tokio", MemoryType::Knowledge, "Tokio runtime configuration"),
        ("exp-review", MemoryType::Experience, "代码审查经验：关注错误处理"),
        ("know-git", MemoryType::Knowledge, "Git rebase vs merge strategies"),
        ("exp-perf", MemoryType::Experience, "性能优化经验：数据库索引"),
        ("pref-timezone", MemoryType::Preference, "时区 UTC+8"),
        ("know-linux", MemoryType::Knowledge, "Linux system administration basics"),
        ("exp-test", MemoryType::Experience, "测试经验：TDD方法论实践"),
        ("know-api", MemoryType::Knowledge, "RESTful API design principles"),
    ];

    for (key, mtype, content) in &entries {
        let entry = MemoryEntry::new(
            &agent_id.to_string(),
            *mtype,
            key,
            content.to_string(),
        );
        adapter.store(&entry).await.unwrap();
    }

    // Create retriever with embedding
    let retriever = MemoryRetriever::new(adapter);
    retriever.set_embedding_client(Arc::new(MockEmbeddingClient::new()));

    // Retrieve memories about user preferences
    let result = retriever
        .retrieve(&agent_id, "我之前说过什么偏好？")
        .await
        .unwrap();

    let total =
        result.knowledge.len() + result.preferences.len() + result.experience.len();
    assert!(
        total > 0,
        "embedding-enhanced retrieval should find memories"
    );

    assert!(
        result.preferences.len() > 0,
        "should find preference memories"
    );
}

/// EM-08: Embedding configuration hot update — no panic, no disruption.
#[tokio::test]
async fn em08_embedding_hot_update() {
    let storage = Arc::new(SqliteStorage::in_memory().await);
    let adapter = Arc::new(VikingAdapter::new(storage));

    let agent_id = AgentId::new();

    // Store a memory
    let entry = MemoryEntry::new(
        &agent_id.to_string(),
        MemoryType::Knowledge,
        "rust-async",
        "Tokio runtime uses work-stealing scheduler".to_string(),
    );
    adapter.store(&entry).await.unwrap();

    // Start without embedding
    let retriever = MemoryRetriever::new(adapter);

    // Retrieve without embedding — should not panic
    let _result_before = retriever
        .retrieve(&agent_id, "async runtime")
        .await
        .unwrap();

    // Hot-update with embedding — should not disrupt ongoing operations
    retriever.set_embedding_client(Arc::new(MockEmbeddingClient::new()));

    // Retrieve with embedding — should not panic
    let _result_after = retriever
        .retrieve(&agent_id, "async runtime")
        .await
        .unwrap();

    // Key assertion: hot-update does not panic or disrupt
}