// Minimal E2E Debug Test - Trace why BM25 returns 0 results
use std::sync::Arc;

use surrealdb::engine::remote::ws::Ws;
use surrealdb::opt::auth::Root;
use surrealdb::Surreal;
use vapora_rlm::search::bm25::BM25Index;
use vapora_rlm::storage::SurrealDBStorage;
use vapora_rlm::RLMEngine;

#[tokio::test]
#[ignore] // Requires SurrealDB
async fn test_e2e_minimal_trace() {
    // Setup - exactly like E2E test
    let db = Surreal::new::<Ws>("127.0.0.1:8000").await.unwrap();
    db.signin(Root {
        username: "root",
        password: "root",
    })
    .await
    .unwrap();
    db.use_ns("test_e2e_minimal")
        .use_db("test_e2e_minimal")
        .await
        .unwrap();

    let storage = Arc::new(SurrealDBStorage::new(db.clone()));
    let bm25_index = Arc::new(BM25Index::new().unwrap());
    let engine = Arc::new(RLMEngine::new(storage, bm25_index.clone()).unwrap());

    // Load a simple document
    let doc_id = format!("minimal-{}", uuid::Uuid::new_v4());
    let content = "This is test content with error handling patterns in Rust programming.";

    println!(
        "1. BEFORE LOAD - BM25 Index stats: {:?}",
        bm25_index.stats()
    );

    let chunk_count = engine.load_document(&doc_id, content, None).await.unwrap();
    println!("2. AFTER LOAD - Chunk count: {}", chunk_count);
    println!("2. AFTER LOAD - BM25 Index stats: {:?}", bm25_index.stats());

    // Small delay to ensure async operations complete
    tokio::time::sleep(tokio::time::Duration::from_millis(100)).await;

    println!(
        "3. AFTER DELAY - BM25 Index stats: {:?}",
        bm25_index.stats()
    );

    // Direct BM25 search (bypassing engine)
    println!("4. DIRECT BM25 SEARCH:");
    let direct_results = bm25_index.search("error handling", 5).unwrap();
    println!(
        "   Direct BM25 search returned {} results",
        direct_results.len()
    );
    for (i, result) in direct_results.iter().enumerate() {
        println!(
            "     Result {}: chunk_id={}, score={}",
            i + 1,
            result.chunk_id,
            result.score
        );
    }

    // Engine query
    println!("5. ENGINE QUERY:");
    let query_results = engine
        .query(&doc_id, "error handling", None, 5)
        .await
        .unwrap();
    println!("   Engine query returned {} results", query_results.len());
    for (i, result) in query_results.iter().enumerate() {
        println!(
            "     Result {}: score={}, bm25={:?}, semantic={:?}",
            i + 1,
            result.score,
            result.bm25_score,
            result.semantic_score
        );
    }

    // Verify
    assert!(chunk_count > 0, "Should create chunks");
    assert!(
        bm25_index.stats().num_docs > 0,
        "BM25 should have documents"
    );
    assert!(
        !direct_results.is_empty(),
        "Direct BM25 search should find results"
    );
    assert!(
        !query_results.is_empty(),
        "Engine query should find results"
    );
}