// RLM Integration Tests
// Tests require SurrealDB to be running: docker run -p 8000:8000
// surrealdb/surrealdb:latest start --bind 0.0.0.0:8000

use surrealdb::engine::remote::ws::Ws;
use surrealdb::opt::auth::Root;
use surrealdb::Surreal;
use vapora_knowledge_graph::persistence::{KGPersistence, PersistedRlmExecution};
use vapora_knowledge_graph::TimePeriod;

async fn setup_test_db() -> KGPersistence {
    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_rlm").use_db("test_rlm").await.unwrap();

    KGPersistence::new(db)
}

#[tokio::test]
#[ignore] // Requires SurrealDB
async fn test_persist_rlm_execution() {
    let persistence = setup_test_db().await;

    let execution = PersistedRlmExecution::builder(
        format!("test-exec-{}", uuid::Uuid::new_v4()),
        "doc-1".to_string(),
        "What is Rust?".to_string(),
    )
    .chunks_used(vec!["chunk-1".to_string(), "chunk-2".to_string()])
    .result("Rust is a systems programming language".to_string())
    .duration_ms(3000)
    .tokens(800, 400)
    .num_llm_calls(2)
    .provider("claude".to_string())
    .success(true)
    .cost_cents(120.0)
    .aggregation_strategy("Concatenate".to_string())
    .build();

    let exec_id = execution.execution_id.clone();
    let doc_id = execution.doc_id.clone();

    let result = persistence.persist_rlm_execution(execution).await;
    assert!(result.is_ok(), "Failed to persist RLM execution");

    // Verify can retrieve
    let executions = persistence
        .get_rlm_executions_by_doc(&doc_id, 10)
        .await
        .unwrap();
    assert!(!executions.is_empty());
    assert_eq!(executions[0].execution_id, exec_id);
}

#[tokio::test]
#[ignore] // Requires SurrealDB
async fn test_get_rlm_learning_curve() {
    let persistence = setup_test_db().await;
    let doc_id = format!("doc-{}", uuid::Uuid::new_v4());

    // Create multiple executions over time
    for i in 0..10 {
        let execution = PersistedRlmExecution::builder(
            format!("exec-{}-{}", doc_id, i),
            doc_id.clone(),
            format!("Query {}", i),
        )
        .chunks_used(vec![format!("chunk-{}", i)])
        .result(format!("Result {}", i))
        .duration_ms(1000 + (i as u64 * 100))
        .tokens(800, 400)
        .provider("claude".to_string())
        .success(i % 3 != 0) // Success rate ~66%
        .build();

        let mut exec = execution;
        if i % 3 == 0 {
            // Add error for failed executions
            exec = PersistedRlmExecution::builder(
                format!("exec-{}-{}", doc_id, i),
                doc_id.clone(),
                format!("Query {}", i),
            )
            .chunks_used(vec![format!("chunk-{}", i)])
            .result(format!("Result {}", i))
            .duration_ms(1000 + (i as u64 * 100))
            .tokens(800, 400)
            .provider("claude".to_string())
            .error("Test error".to_string())
            .build();
        }

        persistence.persist_rlm_execution(exec).await.unwrap();

        // Small delay to ensure different timestamps
        tokio::time::sleep(tokio::time::Duration::from_millis(10)).await;
    }

    // Get learning curve
    let curve = persistence
        .get_rlm_learning_curve(&doc_id, 1)
        .await
        .unwrap();
    assert!(!curve.is_empty(), "Learning curve should not be empty");

    // Verify chronological ordering
    for i in 1..curve.len() {
        assert!(
            curve[i - 1].0 <= curve[i].0,
            "Curve must be chronologically sorted"
        );
    }
}

#[tokio::test]
#[ignore] // Requires SurrealDB
async fn test_get_rlm_success_rate() {
    let persistence = setup_test_db().await;
    let doc_id = format!("doc-{}", uuid::Uuid::new_v4());

    // Create 10 executions: 7 successes, 3 failures
    for i in 0..10 {
        let mut builder = PersistedRlmExecution::builder(
            format!("exec-{}-{}", doc_id, i),
            doc_id.clone(),
            format!("Query {}", i),
        )
        .result("Result".to_string())
        .duration_ms(1000)
        .tokens(800, 400)
        .provider("claude".to_string());

        if i < 7 {
            builder = builder.success(true);
        } else {
            builder = builder.error("Error".to_string());
        }

        let execution = builder.build();
        persistence.persist_rlm_execution(execution).await.unwrap();
    }

    let success_rate = persistence.get_rlm_success_rate(&doc_id).await.unwrap();
    assert!(
        (success_rate - 0.7).abs() < 0.01,
        "Success rate should be ~0.7, got {}",
        success_rate
    );
}

#[tokio::test]
#[ignore] // Requires SurrealDB
async fn test_find_similar_rlm_tasks() {
    let persistence = setup_test_db().await;

    // Create multiple successful executions
    for i in 0..5 {
        let execution = PersistedRlmExecution::builder(
            format!("exec-similar-{}", i),
            format!("doc-{}", i),
            format!("Query about topic {}", i % 3),
        )
        .result("Result".to_string())
        .duration_ms(1000)
        .tokens(800, 400)
        .provider("claude".to_string())
        .success(true)
        .query_embedding(vec![0.1 * i as f32; 1536])
        .build();

        persistence.persist_rlm_execution(execution).await.unwrap();
    }

    // Search for similar tasks
    let query_embedding = vec![0.1; 1536];
    let similar = persistence
        .find_similar_rlm_tasks(&query_embedding, 3)
        .await
        .unwrap();

    assert!(!similar.is_empty(), "Should find similar tasks");
    assert!(similar.len() <= 3, "Should respect limit");

    // All returned tasks should be successful
    for task in similar {
        assert!(task.success, "Similar tasks should be successful");
    }
}

#[tokio::test]
#[ignore] // Requires SurrealDB
async fn test_get_rlm_cost_summary() {
    let persistence = setup_test_db().await;
    let doc_id = format!("doc-{}", uuid::Uuid::new_v4());

    // Create executions with known costs and tokens
    for i in 0..5 {
        let execution = PersistedRlmExecution::builder(
            format!("exec-{}-{}", doc_id, i),
            doc_id.clone(),
            format!("Query {}", i),
        )
        .result("Result".to_string())
        .duration_ms(1000)
        .tokens(1000, 500) // 1k input, 500 output
        .provider("claude".to_string())
        .success(true)
        .cost_cents(100.0) // 100 cents each
        .build();

        persistence.persist_rlm_execution(execution).await.unwrap();
    }

    let (total_cost, input_tokens, output_tokens) = persistence
        .get_rlm_cost_summary(&doc_id, TimePeriod::LastDay)
        .await
        .unwrap();

    assert_eq!(total_cost, 500.0, "Total cost should be 500 cents");
    assert_eq!(input_tokens, 5000, "Total input tokens should be 5000");
    assert_eq!(output_tokens, 2500, "Total output tokens should be 2500");
}

#[tokio::test]
#[ignore] // Requires SurrealDB
async fn test_batch_persist_rlm_executions() {
    let persistence = setup_test_db().await;
    let doc_id = format!("doc-{}", uuid::Uuid::new_v4());

    let executions: Vec<PersistedRlmExecution> = (0..5)
        .map(|i| {
            PersistedRlmExecution::builder(
                format!("batch-exec-{}", i),
                doc_id.clone(),
                format!("Batch query {}", i),
            )
            .result("Result".to_string())
            .duration_ms(1000)
            .tokens(800, 400)
            .provider("claude".to_string())
            .success(true)
            .build()
        })
        .collect();

    let result = persistence.persist_rlm_executions(executions).await;
    assert!(result.is_ok(), "Batch persist should succeed");

    let retrieved = persistence
        .get_rlm_executions_by_doc(&doc_id, 10)
        .await
        .unwrap();
    assert_eq!(retrieved.len(), 5, "Should retrieve all 5 executions");
}

#[tokio::test]
#[ignore] // Requires SurrealDB
async fn test_cleanup_old_rlm_executions() {
    let persistence = setup_test_db().await;
    let doc_id = format!("doc-cleanup-{}", uuid::Uuid::new_v4());

    // Create an old execution
    let old_execution = PersistedRlmExecution::builder(
        format!("old-exec-{}", uuid::Uuid::new_v4()),
        doc_id.clone(),
        "Old query".to_string(),
    )
    .result("Result".to_string())
    .duration_ms(1000)
    .tokens(800, 400)
    .provider("claude".to_string())
    .success(true)
    .build();

    persistence
        .persist_rlm_execution(old_execution)
        .await
        .unwrap();

    // Cleanup executions older than 0 days (should delete all)
    let result = persistence.cleanup_old_rlm_executions(0).await;
    assert!(result.is_ok(), "Cleanup should succeed");

    // Note: SurrealDB doesn't return delete count, so we can't verify count
    // But we can verify the operation completed without error
}

#[tokio::test]
#[ignore] // Requires SurrealDB
async fn test_get_rlm_execution_count() {
    let persistence = setup_test_db().await;

    let initial_count = persistence.get_rlm_execution_count().await.unwrap();

    // Add 3 executions
    for i in 0..3 {
        let execution = PersistedRlmExecution::builder(
            format!("count-exec-{}", i),
            "count-doc".to_string(),
            "Query".to_string(),
        )
        .result("Result".to_string())
        .duration_ms(1000)
        .tokens(800, 400)
        .provider("claude".to_string())
        .success(true)
        .build();

        persistence.persist_rlm_execution(execution).await.unwrap();
    }

    let final_count = persistence.get_rlm_execution_count().await.unwrap();
    assert!(
        final_count >= initial_count + 3,
        "Count should increase by at least 3"
    );
}